Aleksei Gimbitskii
made some changes in config header file to make this library work with 1602A display and PCF8574AT I2C-bus interface
Fork of
TextLCD
by 
Wim Huiskamp
TextLCD.cpp
- Committer:
- wim
- Date:
- 2015-04-18
- Revision:
- 38:cbe275b0b647
- Parent:
- 37:ce348c002929
- Child:
- 39:e9c2319de9c5
File content as of revision 38:cbe275b0b647:
/* mbed TextLCD Library, for LCDs based on HD44780 controllers
* Copyright (c) 2007-2010, sford, http://mbed.org
* 2013, v01: WH, Added LCD types, fixed LCD address issues, added Cursor and UDCs
* 2013, v02: WH, Added I2C and SPI bus interfaces
* 2013, v03: WH, Added support for LCD40x4 which uses 2 controllers
* 2013, v04: WH, Added support for Display On/Off, improved 4bit bootprocess
* 2013, v05: WH, Added support for 8x2B, added some UDCs
* 2013, v06: WH, Added support for devices that use internal DC/DC converters
* 2013, v07: WH, Added support for backlight and include portdefinitions for LCD2004 Module from DFROBOT
* 2014, v08: WH, Refactored in Base and Derived Classes to deal with mbed lib change regarding 'NC' defined pins
* 2014, v09: WH/EO, Added Class for Native SPI controllers such as ST7032
* 2014, v10: WH, Added Class for Native I2C controllers such as ST7032i, Added support for MCP23008 I2C portexpander, Added support for Adafruit module
* 2014, v11: WH, Added support for native I2C controllers such as PCF21XX, Improved the _initCtrl() method to deal with differences between all supported controllers
* 2014, v12: WH, Added support for native I2C controller PCF2119 and native I2C/SPI controllers SSD1803, ST7036, added setContrast method (by JH1PJL) for supported devices (eg ST7032i)
* 2014, v13: WH, Added support for controllers US2066/SSD1311 (OLED), added setUDCBlink() method for supported devices (eg SSD1803), fixed issue in setPower()
* 2014, v14: WH, Added support for PT6314 (VFD), added setOrient() method for supported devices (eg SSD1803, US2066), added Double Height lines for supported devices,
* added 16 UDCs for supported devices (eg PCF2103), moved UDC defines to TextLCD_UDC file, added TextLCD_Config.h for feature and footprint settings.
* 2014, v15: WH, Added AC780 support, added I2C expander modules, fixed setBacklight() for inverted logic modules. Fixed bug in LCD_SPI_N define
* 2014, v16: WH, Added ST7070 and KS0073 support, added setIcon(), clrIcon() and setInvert() method for supported devices
* 2015, v17: WH, Clean up low-level _writeCommand() and _writeData(), Added support for alternative fonttables (eg PCF21XX), Added ST7066_ACM controller for ACM1602 module
* 2015, v18: WH, Performance improvement I2C portexpander
* 2015, v19: WH, Fixed Adafruit I2C/SPI portexpander pinmappings, fixed SYDZ Backlight
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "mbed.h"
#include "TextLCD.h"
#include "TextLCD_UDC.inc"
/** Create a TextLCD_Base interface
*
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param ctrl LCD controller (default = HD44780)
*/
TextLCD_Base::TextLCD_Base(LCDType type, LCDCtrl ctrl) : _type(type), _ctrl(ctrl) {
// Extract LCDType data
// Columns encoded in b7..b0
_nr_cols = (_type & 0xFF);
// Rows encoded in b15..b8
_nr_rows = ((_type >> 8) & 0xFF);
// Addressing mode encoded in b19..b16
_addr_mode = _type & LCD_T_ADR_MSK;
// Font table, encoded in LCDCtrl
_font = _type & LCD_C_FNT_MSK;
}
/** Init the LCD Controller(s)
* Clear display
* @param _LCDDatalength dl sets the datalength of data/commands
* @return none
*/
void TextLCD_Base::_init(_LCDDatalength dl) {
wait_ms(100); // Wait 100ms to ensure powered up
// Select and configure second LCD controller when needed
if(_type==LCD40x4) {
_ctrl_idx=_LCDCtrl_1; // Select 2nd controller
_initCtrl(dl); // Init 2nd controller
}
// Select and configure primary LCD controller
_ctrl_idx=_LCDCtrl_0; // Select primary controller
_initCtrl(dl); // Init primary controller
// Clear whole display and Reset Cursor location
// Note: This will make sure that some 3-line displays that skip topline of a 4-line configuration
// are cleared and init cursor correctly.
cls();
}
/** Init the LCD controller
* Set number of lines, fonttype, no cursor etc
* The controller is accessed in 4-bit parallel mode either directly via mbed pins or through I2C or SPI expander.
* Some controllers also support native I2C or SPI interfaces.
*
* @param _LCDDatalength dl sets the 4 or 8 bit datalength of data/commands. Required for some native serial modes.
* @return none
*
* Note: some configurations are commented out because they have not yet been tested due to lack of hardware
*/
void TextLCD_Base::_initCtrl(_LCDDatalength dl) {
int _bias_lines=0; // Set Bias and lines (Instr Set 1), temporary variable.
int _lines=0; // Set lines (Ext Instr Set), temporary variable.
this->_setRS(false); // command mode
if (dl == _LCD_DL_4) {
// The Controller could be in 8 bit mode (power-on reset) or in 4 bit mode (warm reboot) at this point.
// Follow this procedure to make sure the Controller enters the correct state. The hardware interface
// between the uP and the LCD can only write the 4 most significant bits (Most Significant Nibble, MSN).
// In 4 bit mode the LCD expects the MSN first, followed by the LSN.
//
// Current state: 8 bit mode | 4 bit mode, MSN is next | 4 bit mode, LSN is next
//-------------------------------------------------------------------------------------------------
_writeNibble(0x3); // set 8 bit mode (MSN) and dummy LSN, | set 8 bit mode (MSN), | set dummy LSN,
// remains in 8 bit mode | remains in 4 bit mode | remains in 4 bit mode
wait_ms(15); //
_writeNibble(0x3); // set 8 bit mode (MSN) and dummy LSN, | set dummy LSN, | set 8bit mode (MSN),
// remains in 8 bit mode | change to 8 bit mode | remains in 4 bit mode
wait_ms(15); //
_writeNibble(0x3); // set 8 bit mode (MSN) and dummy LSN, | set 8 bit mode (MSN) and dummy LSN, | set dummy LSN,
// remains in 8 bit mode | remains in 8 bit mode | change to 8 bit mode
wait_ms(15); //
// Controller is now in 8 bit mode
_writeNibble(0x2); // Change to 4-bit mode (MSN), the LSN is undefined dummy
wait_us(40); // most instructions take 40us
// Controller is now in 4-bit mode
// Note: 4/8 bit mode is ignored for most native SPI and I2C devices. They dont use the parallel bus.
// However, _writeNibble() method is void anyway for native SPI and I2C devices.
}
else {
// Reset in 8 bit mode, final Function set will follow
_writeCommand(0x30); // Function set 0 0 1 DL=1 N F x x
}
// Device specific initialisations: DC/DC converter to generate VLCD or VLED, number of lines etc
switch (_ctrl) {
case KS0073:
// Initialise Display configuration
switch (_type) {
case LCD8x1: //8x1 is a regular 1 line display
case LCD12x1:
case LCD16x1:
case LCD20x1:
case LCD24x1:
// case LCD32x1: // EXT pin is High, extension driver needed
// case LCD40x1: // EXT pin is High, extension driver needed
_function = 0x02; // Function set 001 DL N RE(0) DH REV (Std Regs)
// DL=0 (4 bits bus)
// N=0 (1-line mode, N=1 2-line mode)
// RE=0 (Dis. Extended Regs, special mode for KS0073)
// DH=1 (Disp shift enable, special mode for KS0073)
// REV=0 (Reverse normal, special mode for KS0073)
_function_1 = 0x04; // Function set 001 DL N RE(1) BE LP (Ext Regs)
// DL=0 (4 bits bus)
// N=0 (1-line mode, N=1 2-line mode)
// RE=1 (Ena Extended Regs, special mode for KS0073)
// BE=0 (Blink Enable, CG/SEG RAM, special mode for KS0073)
// LP=0 (LP=1 Low power mode, LP=0 Normal)
_function_x = 0x00; // Ext Function set 0000 1 FW BW NW (Ext Regs)
// NW=0 (1,2 line), NW=1 (4 Line, special mode for KS0073)
break;
// case LCD12x3D: // Special mode for KS0073, KS0078 and PCF21XX
// case LCD12x3D1: // Special mode for KS0073, KS0078 and PCF21XX
case LCD12x4D: // Special mode for KS0073, KS0078 and PCF21XX
// case LCD16x3D: // Special mode for KS0073, KS0078
// case LCD16x4D: // Special mode for KS0073, KS0078
case LCD20x4D: // Special mode for KS0073, KS0078
_function = 0x02; // Function set 001 DL N RE(0) DH REV (Std Regs)
// DL=0 (4 bits bus)
// N=0 (dont care for 4 line mode)
// RE=0 (Dis. Extended Regs, special mode for KS0073)
// DH=1 (Disp shift enable, special mode for KS0073)
// REV=0 (Reverse normal, special mode for KS0073)
_function_1 = 0x04; // Function set 001 DL N RE(1) BE LP (Ext Regs)
// DL=0 (4 bits bus)
// N=0 (1-line mode), N=1 (2-line mode)
// RE=1 (Ena Extended Regs, special mode for KS0073)
// BE=0 (Blink Enable, CG/SEG RAM, special mode for KS0073)
// LP=0 (LP=1 Low power mode, LP=0 Normal)
_function_x = 0x01; // Ext Function set 0000 1 FW BW NW (Ext Regs)
// NW=0 (1,2 line), NW=1 (4 Line, special mode for KS0073)
break;
case LCD16x3G: // Special mode for ST7036
// case LCD24x3D: // Special mode for KS0078
// case LCD24x3D1: // Special mode for KS0078
case LCD24x4D: // Special mode for KS0078
error("Error: LCD Controller type does not support this Display type\n\r");
break;
default:
// All other LCD types are initialised as 2 Line displays (including LCD16x1C and LCD40x4)
_function = 0x0A; // Function set 001 DL N RE(0) DH REV (Std Regs)
// DL=0 (4 bits bus)
// N=1 (2-line mode), N=0 (1-line mode)
// RE=0 (Dis. Extended Regs, special mode for KS0073)
// DH=1 (Disp shift enable, special mode for KS0073)
// REV=0 (Reverse normal, special mode for KS0073)
_function_1 = 0x0C; // Function set 001 DL N RE(1) BE LP (Ext Regs)
// DL=0 (4 bits bus)
// N=1 (2 line mode), N=0 (1-line mode)
// RE=1 (Ena Extended Regs, special mode for KS0073)
// BE=0 (Blink Enable, CG/SEG RAM, special mode for KS0073)
// LP=0 (LP=1 Low power mode, LP=0 Normal)
_function_x = 0x00; // Ext Function set 0000 1 FW BW NW (Ext Regs)
// NW=0 (1,2 line), NW=1 (4 Line, special mode for KS0073)
break;
} // switch type
// init special features
_writeCommand(0x20 | _function_1);// Function set 001 DL N RE(1) BE LP (Ext Regs)
// DL=0 (4 bits bus), DL=1 (8 bits mode)
// N=0 (1 line mode), N=1 (2 line mode)
// RE=1 (Ena Extended Regs, special mode for KS0073)
// BE=0 (Blink Enable/Disable, CG/SEG RAM, special mode for KS0073)
// LP=0 (LP=1 Low power mode, LP=0 Normal)
_writeCommand(0x08 | _function_x); // Ext Function set 0000 1 FW BW NW (Ext Regs)
// FW=0 (5-dot font, special mode for KS0073)
// BW=0 (Cur BW invert disable, special mode for KS0073)
// NW=0 (1,2 Line), NW=1 (4 line, special mode for KS0073)
_writeCommand(0x10); // Scroll/Shift set 0001 DS/HS4 DS/HS3 DS/HS2 DS/HS1 (Ext Regs)
// Dotscroll/Display shift enable (Special mode for KS0073)
_writeCommand(0x80); // Scroll Quantity set 1 0 SQ5 SQ4 SQ3 SQ2 SQ1 SQ0 (Ext Regs)
// Scroll quantity (Special mode for KS0073)
_writeCommand(0x20 | _function); // Function set 001 DL N RE(0) DH REV (Std Regs)
// DL=0 (4 bits bus), DL=1 (8 bits mode)
// N=0 (1 line mode), N=1 (2 line mode)
// RE=0 (Dis. Extended Regs, special mode for KS0073)
// DH=1 (Disp shift enable/disable, special mode for KS0073)
// REV=0 (Reverse/Normal, special mode for KS0073)
break; // case KS0073 Controller
case KS0078:
// Initialise Display configuration
switch (_type) {
case LCD8x1: //8x1 is a regular 1 line display
case LCD8x2B: //8x2B is a special case of 16x1
// case LCD12x1:
case LCD16x1:
// case LCD20x1:
case LCD24x1:
_function = 0x02; // Function set 001 DL N RE(0) DH REV (Std Regs)
// DL=0 (4 bits bus)
// N=0 (1 line mode), N=1 (2 line mode)
// RE=0 (Dis. Extended Regs, special mode for KS0078)
// DH=1 (Disp shift enable, special mode for KS0078)
// REV=0 (Reverse normal, special mode for KS0078)
_function_1 = 0x04; // Function set 001 DL N RE(1) BE 0 (Ext Regs)
// DL=0 (4 bits bus)
// N=0 (1 line mode), N=1 (2 line mode)
// RE=1 (Ena Extended Regs, special mode for KS0078)
// BE=0 (Blink Enable, CG/SEG RAM, special mode for KS0078)
// 0
_function_x = 0x00; // Ext Function set 0000 1 FW BW NW (Ext Regs)
// NW=0 (1,2 line), NW=1 (4 Line, special mode for KS0078)
break;
// case LCD12x3D: // Special mode for KS0073, KS0078 and PCF21XX
// case LCD12x3D1: // Special mode for KS0073, KS0078 and PCF21XX
// case LCD12x4D: // Special mode for KS0073, KS0078 and PCF21XX
// case LCD16x3D: // Special mode for KS0073, KS0078
// case LCD16x4D: // Special mode for KS0073, KS0078
// case LCD20x4D: // Special mode for KS0073, KS0078
// case LCD24x3D: // Special mode for KS0078
// case LCD24x3D1: // Special mode for KS0078
case LCD24x4D: // Special mode for KS0078
_function = 0x02; // Function set 001 DL N RE(0) DH REV (Std Regs)
// DL=0 (4 bits bus)
// N=0 (dont care for 4 line mode)
// RE=0 (Dis. Extended Regs, special mode for KS0078)
// DH=1 (Disp shift enable, special mode for KS0078)
// REV=0 (Reverse normal, special mode for KS0078)
_function_1 = 0x04; // Function set 001 DL N RE(1) BE 0 (Ext Regs)
// DL=0 (4 bits bus)
// N=0 (1 line mode), N=1 (2 line mode)
// RE=1 (Ena Extended Regs, special mode for KS0078)
// BE=0 (Blink Enable, CG/SEG RAM, special mode for KS0078)
// 0
_function_x = 0x01; // Ext Function set 0000 1 FW BW NW (Ext Regs)
// NW=0 (1,2 line), NW=1 (4 Line, special mode for KS0078)
break;
case LCD16x3G: // Special mode for ST7036
error("Error: LCD Controller type does not support this Display type\n\r");
break;
default:
// All other LCD types are initialised as 2 Line displays (including LCD16x1C and LCD40x4)
_function = 0x0A; // Function set 001 DL N RE(0) DH REV (Std Regs)
// DL=0 (4 bits bus)
// N=1 (1 line mode), N=1 (2 line mode)
// RE=0 (Dis. Extended Regs, special mode for KS0078)
// DH=1 (Disp shift enable, special mode for KS0078)
// REV=0 (Reverse normal, special mode for KS0078)
_function_1 = 0x0C; // Function set 001 DL N RE(1) BE 0 (Ext Regs)
// DL=0 (4 bits bus)
// N=1 (1 line mode), N=1 (2 line mode)
// RE=1 (Ena Extended Regs, special mode for KS0078)
// BE=0 (Blink Enable, CG/SEG RAM, special mode for KS0078)
// 0
_function_x = 0x00; // Ext Function set 0000 1 FW BW NW (Ext Regs)
// NW=0 (1,2 line), NW=1 (4 Line, special mode for KS0078)
break;
} // switch type
// init special features
_writeCommand(0x20 | _function_1);// Function set 001 DL N RE(1) BE 0 (Ext Regs)
// DL=0 (4 bits bus), DL=1 (8 bits mode)
// N=0 (1 line mode), N=1 (2 line mode)
// RE=1 (Ena Extended Regs, special mode for KS0078)
// BE=0 (Blink Enable/Disable, CG/SEG RAM, special mode for KS0078)
// 0
_writeCommand(0x08 | _function_x); // Ext Function set 0000 1 FW BW NW (Ext Regs)
// FW=0 (5-dot font, special mode for KS0078)
// BW=0 (Cur BW invert disable, special mode for KS0078)
// NW=0 (1,2 Line), NW=1 (4 line, special mode for KS0078)
_writeCommand(0x10); // Scroll/Shift set 0001 DS/HS4 DS/HS3 DS/HS2 DS/HS1 (Ext Regs)
// Dotscroll/Display shift enable (Special mode for KS0078)
_writeCommand(0x80); // Scroll Quantity set 1 0 SQ5 SQ4 SQ3 SQ2 SQ1 SQ0 (Ext Regs)
// Scroll quantity (Special mode for KS0078)
_writeCommand(0x20 | _function); // Function set 001 DL N RE(0) DH REV (Std Regs)
// DL=0 (4 bits bus), DL=1 (8 bits mode)
// N=0 (1 line mode), N=1 (2 line mode)
// RE=0 (Dis. Extended Regs, special mode for KS0078)
// DH=1 (Disp shift enable/disable, special mode for KS0078)
// REV=0 (Reverse/Normal, special mode for KS0078)
break; // case KS0078 Controller
case ST7032_3V3:
// ST7032 controller: Initialise Voltage booster for VLCD. VDD=3V3
case ST7032_5V:
// ST7032 controller: Disable Voltage booster for VLCD. VDD=5V
// Initialise Display configuration
switch (_type) {
case LCD8x1: //8x1 is a regular 1 line display
case LCD8x2B: //8x2B is a special case of 16x1
// case LCD12x1:
case LCD16x1:
// case LCD20x1:
case LCD24x1:
_function = 0x00; // FUNCTION SET 0 0 1 DL=0 (4 bit), N=0 (1-line display mode), F=0 (5*7dot), 0, IS
// Note: 4 bit mode is ignored for native SPI and I2C devices
// Saved to allow switch between Instruction sets at later time
break;
case LCD12x3D: // Special mode for KS0078 and PCF21XX
case LCD12x3D1: // Special mode for KS0078 and PCF21XX
case LCD12x4D: // Special mode for KS0078 and PCF21XX
case LCD16x3G: // Special mode for ST7036
case LCD24x4D: // Special mode for KS0078
error("Error: LCD Controller type does not support this Display type\n\r");
break;
default:
// All other LCD types are initialised as 2 Line displays
_function = 0x08; // FUNCTION SET 0 0 1 DL=0 (4 bit), N=1 (2-line display mode), F=0 (5*7dot), 0, IS
// Note: 4 bit mode is ignored for native SPI and I2C devices
// Saved to allow switch between Instruction sets at later time
break;
} // switch type
// init special features
_writeCommand(0x20 | _function | 0x01); // Set function, 0 0 1 DL N F 0 IS=1 Select Instr Set = 1
_writeCommand(0x1C); // Internal OSC frequency adjustment Framefreq=183HZ, Bias will be 1/4 (Instr Set=1)
_contrast = LCD_ST7032_CONTRAST;
_writeCommand(0x70 | (_contrast & 0x0F)); // Set Contrast Low bits, 0 1 1 1 C3 C2 C1 C0 (IS=1)
if (_ctrl == ST7032_3V3) {
// _icon_power = 0x04; // Icon display off, Booster circuit is turned on (IS=1)
_icon_power = 0x0C; // Icon display on, Booster circuit is turned on (IS=1)
// Saved to allow contrast change at later time
}
else {
// _icon_power = 0x00; // Icon display off, Booster circuit is turned off (IS=1)
_icon_power = 0x08; // Icon display on, Booster circuit is turned off (IS=1)
// Saved to allow contrast change at later time
}
_writeCommand(0x50 | _icon_power | ((_contrast >> 4) & 0x03)); // Set Icon, Booster and Contrast High bits, 0 1 0 1 Ion Bon C5 C4 (IS=1)
wait_ms(10); // Wait 10ms to ensure powered up
_writeCommand(0x68 | (LCD_ST7032_RAB & 0x07)); // Voltage follower, 0 1 1 0 FOn=1, Ampl ratio Rab2=1, Rab1=0, Rab0=0 (IS=1)
wait_ms(10); // Wait 10ms to ensure powered up
_writeCommand(0x20 | _function); // Select Instruction Set = 0
break; // case ST7032_3V3 Controller
// case ST7032_5V Controller
case ST7036_3V3:
// ST7036 controller: Initialise Voltage booster for VLCD. VDD=3V3
// Note: supports 1,2 (LCD_T_A) or 3 lines (LCD_T_G)
case ST7036_5V:
// ST7036 controller: Disable Voltage booster for VLCD. VDD=5V
// Note: supports 1,2 (LCD_T_A) or 3 lines (LCD_T_G)
// Initialise Display configuration
switch (_type) {
case LCD8x1: //8x1 is a regular 1 line display
case LCD8x2B: //8x2D is a special case of 16x1
// case LCD12x1:
case LCD16x1:
case LCD24x1:
_function = 0x00; // Set function, 0 0 1 DL=0 (4-bit Databus), N=0 (1 Line), DH=0 (5x7font), IS2, IS1 (Select Instruction Set)
// Note: 4 bit mode is ignored for native SPI and I2C devices
// Saved to allow switch between Instruction sets at later time
_bias_lines = 0x04; // Bias: 1/5, 1 or 2-Lines LCD
break;
// case LCD12x3G: // Special mode for ST7036
case LCD16x3G: // Special mode for ST7036
_function = 0x08; // Set function, 0 0 1 DL=0 (4-bit Databus), N=1 (2 Line), DH=0 (5x7font), IS2,IS1 (Select Instruction Set)
// Note: 4 bit mode is ignored for native SPI and I2C devices
// Saved to allow switch between Instruction sets at later time
_bias_lines = 0x05; // Bias: 1/5, 3-Lines LCD
break;
// case LCD12x3D1: // Special mode for KS0078 and PCF21XX
// case LCD16x3D1: // Special mode for SSD1803
case LCD12x4D: // Special mode for PCF2116
case LCD24x4D: // Special mode for KS0078
error("Error: LCD Controller type does not support this Display type\n\r");
break;
default:
// All other LCD types are initialised as 2 Line displays (including LCD16x1C and LCD40x4)
_function = 0x08; // Set function, 0 0 1 DL=0 (4-bit Databus), N=1 (2 Line), DH=0 (5x7font), IS2,IS1 (Select Instruction Set)
// Note: 4 bit mode is ignored for native SPI and I2C devices
// Saved to allow switch between Instruction sets at later time
_bias_lines = 0x04; // Bias: 1/5, 1 or 2-Lines LCD
break;
} // switch type
// init special features
_writeCommand(0x20 | _function | 0x01); // Set function, IS2,IS1 = 01 (Select Instr Set = 1)
_writeCommand(0x10 | _bias_lines); // Set Bias and 1,2 or 3 lines (Instr Set 1)
_contrast = LCD_ST7036_CONTRAST;
_writeCommand(0x70 | (_contrast & 0x0F)); // Set Contrast, 0 1 1 1 C3 C2 C1 C0 (Instr Set 1)
if (_ctrl == ST7036_3V3) {
_icon_power = 0x0C; // Set Icon, Booster, Contrast High bits, 0 1 0 1 Ion=1 Bon=1 C5 C4 (Instr Set 1)
// _icon_power = 0x04; // Set Icon, Booster, Contrast High bits, 0 1 0 1 Ion=0 Bon=1 C5 C4 (Instr Set 1)
// Saved to allow contrast change at later time
}
else {
_icon_power = 0x08; // Set Icon, Booster, Contrast High bits, 0 1 0 1 Ion=1 Bon=0 C5 C4 (Instr Set 1)
// _icon_power = 0x00; // Set Icon, Booster, Contrast High bits, 0 1 0 1 Ion=0 Bon=0 C5 C4 (Instr Set 1)
}
_writeCommand(0x50 | _icon_power | ((_contrast >> 4) & 0x03)); // Set Contrast C5, C4 (Instr Set 1)
wait_ms(10); // Wait 10ms to ensure powered up
_writeCommand(0x68 | (LCD_ST7036_RAB & 0x07)); // Voltagefollower On = 1, Ampl ratio Rab2, Rab1, Rab0 = 1 0 1 (Instr Set 1)
wait_ms(10); // Wait 10ms to ensure powered up
_writeCommand(0x20 | _function); // Set function, IS2,IS1 = 00 (Select Instruction Set = 0)
break; // case ST7036_3V3 Controller
// case ST7036_5V Controller
case ST7070:
// Initialise Display configuration
switch (_type) {
case LCD8x1: //8x1 is a regular 1 line display
case LCD8x2B: //8x2D is a special case of 16x1
// case LCD12x1:
case LCD16x1:
case LCD24x1:
_function = dl | 0x00; // Set function, 0 0 1 DL=0 (4-bit Databus), N=0 (1 Line), EXT=0, x, x
// Note: 4 bit mode is NOT ignored for native SPI !
// Saved to allow switch between Instruction sets at later time
break;
// case LCD12x3D1: // Special mode for KS0078 and PCF21XX
// case LCD16x3D1: // Special mode for SSD1803
case LCD12x4D: // Special mode for PCF2116
case LCD24x4D: // Special mode for KS0078
// case LCD12x3G: // Special mode for ST7036
case LCD16x3G: // Special mode for ST7036
error("Error: LCD Controller type does not support this Display type\n\r");
break;
default:
// All other LCD types are initialised as 2 Line displays (including LCD16x1C and LCD40x4)
_function = dl | 0x08; // Set function, 0 0 1 DL, N=1 (2 Line), EXT=0, x, x
// Note: 4 bit mode is NOT ignored for native SPI !
// Saved to allow switch between Instruction sets at later time
break;
} // switch type
// _writeCommand(0x00); // NOP, make sure to sync SPI
// init special features
_writeCommand(0x20 | _function | 0x04); // Set function, 0 0 1 DL N EXT=1 x x (Select Instr Set = 1)
_writeCommand(0x04 | 0x00); // Set Bias resistors 0 0 0 0 0 1 Rb1,Rb0= 0 0 (Extern Res) (Instr Set 1)
_writeCommand(0x40 | 0x00); // COM/SEG directions 0 1 0 0 C1, C2, S1, S2 (Instr Set 1)
// C1=1: Com1-8 -> Com8-1; C2=1: Com9-16 -> Com16-9
// S1=1: Seg1-40 -> Seg40-1; S2=1: Seg41-80 -> Seg80-41
_writeCommand(0x20 | _function); // Set function, EXT=0 (Select Instr Set = 0)
break; // case ST7070 Controller
case SSD1803_3V3:
// SSD1803 controller: Initialise Voltage booster for VLCD. VDD=3V3
// Note: supports 1,2, 3 or 4 lines
// case SSD1803_5V:
// SSD1803 controller: No Voltage booster for VLCD. VDD=5V
// Initialise Display configuration
switch (_type) {
case LCD8x1: //8x1 is a regular 1 line display
case LCD8x2B: //8x2D is a special case of 16x1
// case LCD12x1:
case LCD16x1:
case LCD24x1:
_function = 0x00; // Set function 0 0 1 DL N DH RE(0) IS
// Saved to allow switch between Instruction sets at later time
// DL=0 4-bit Databus,
// Note: 4 bit mode is ignored for native SPI and I2C devices
// N=0 1 Line / 3 Line
// DH=0 Double Height disable
// IS=0
_function_1 = 0x02; // Set function, 0 0 1 DL N BE RE(1) REV
// Saved to allow switch between Instruction sets at later time
// DL=0 4-bit Databus,
// Note: 4 bit mode is ignored for native SPI and I2C devices
// N=0 1 Line / 3 Line
// BE=0 Blink Enable off, special feature of SSD1803
// REV=0 Reverse off, special feature of SSD1803
_lines = 0x00; // Ext function set 0 0 0 0 1 FW BW NW
// NW=0 1-Line LCD (N=0)
break;
case LCD12x3D: // Special mode for KS0078 and PCF21XX
// case LCD12x3D1: // Special mode for KS0078 and PCF21XX
case LCD16x3D: // Special mode for KS0078
// case LCD16x3D1: // Special mode for SSD1803
// case LCD20x3D: // Special mode for SSD1803
_function = 0x00; // Set function 0 0 1 DL N DH RE(0) IS
// Saved to allow switch between Instruction sets at later time
// DL=0 4-bit Databus,
// Note: 4 bit mode is ignored for native SPI and I2C devices
// N=0 1 Line / 3 Line
// DH=0 Double Height disable
// IS=0
_function_1 = 0x02; // Set function, 0 0 1 DL N BE RE(1) REV
// Saved to allow switch between Instruction sets at later time
// DL=0 4-bit Databus,
// Note: 4 bit mode is ignored for native SPI and I2C devices
// N=0 1 Line / 3 Line
// BE=0 Blink Enable off, special feature of SSD1803
// REV=0 Reverse off, special feature of SSD1803
_lines = 0x00; // Ext function set 0 0 0 0 1 FW BW NW
// NW=1 3-Line LCD (N=0)
break;
case LCD20x4D: // Special mode for SSD1803
_function = 0x08; // Set function 0 0 1 DL N DH RE(0) IS
// Saved to allow switch between Instruction sets at later time
// DL=0 4-bit Databus,
// Note: 4 bit mode is ignored for native SPI and I2C devices
// N=1 4 Line
// DH=0 Double Height disable
// IS=0
_function_1 = 0x0A; // Set function, 0 0 1 DL N BE RE(1) REV
// Saved to allow switch between Instruction sets at later time
// DL=0 4-bit Databus,
// Note: 4 bit mode is ignored for native SPI and I2C devices
// N=1 4 Line
// BE=0 Blink Enable off, special feature of SSD1803
// REV=0 Reverse off, special feature of SSD1803
_lines = 0x01; // Ext function set 0 0 0 0 1 FW BW NW
// NW=1 4-Line LCD (N=1)
break;
case LCD16x3G: // Special mode for ST7036
case LCD24x4D: // Special mode for KS0078
error("Error: LCD Controller type does not support this Display type\n\r");
break;
default:
// All other LCD types are initialised as 2 Line displays (including LCD16x1C and LCD40x4)
_function = 0x08; // Set function 0 0 1 DL N DH RE(0) IS
// Saved to allow switch between Instruction sets at later time
// DL=0 4-bit Databus,
// Note: 4 bit mode is ignored for native SPI and I2C devices
// N=1 2 line / 4 Line
// DH=0 Double Height disable
// RE=0
// IS=0
_function_1 = 0x0A; // Set function, 0 0 1 DL N BE RE(1) REV
// Saved to allow switch between Instruction sets at later time
// DL=0 4-bit Databus,
// Note: 4 bit mode is ignored for native SPI and I2C devices
// N=1 2 line / 4 Line
// BE=0 Blink Enable off, special feature of SSD1803
// RE=1
// REV=0 Reverse off, special feature of SSD1803
_lines = 0x00; // Ext function set 0 0 0 0 1 FW BW NW
// NW=0 2-Line LCD (N=1)
break;
} // switch type
// init special features
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 DL N BE RE(1) REV
// Select Extended Instruction Set
_writeCommand(0x06); // Set ext entry mode, 0 0 0 0 0 1 BDC=1 COM1-32, BDS=0 SEG100-1 "Bottom View" (Ext Instr Set)
// _writeCommand(0x05); // Set ext entry mode, 0 0 0 0 0 1 BDC=0 COM32-1, BDS=1 SEG1-100 "Top View" (Ext Instr Set)
wait_ms(5); // Wait to ensure completion or SSD1803 fails to set Top/Bottom after reset..
_writeCommand(0x08 | _lines); // Set ext function 0 0 0 0 1 FW BW NW 1,2,3 or 4 lines (Ext Instr Set)
_writeCommand(0x10); // Double Height and Bias, 0 0 0 1 UD2=0, UD1=0, BS1=0 Bias 1/5, DH=0 (Ext Instr Set)
// _writeCommand(0x76); // Set TC Control, 0 1 1 1 0 1 1 0 (Ext Instr Set)
// _writeData(0x02); // Set TC data, 0 0 0 0 0 TC2,TC1,TC0 = 0 1 0 (Ext Instr Set)
_writeCommand(0x20 | _function | 0x01); // Set function, 0 0 1 DL N DH RE(0) IS=1 Select Instruction Set 1
// Select Std Instr set, Select IS=1
_contrast = LCD_SSD1_CONTRAST;
_writeCommand(0x70 | (_contrast & 0x0F)); // Set Contrast 0 1 1 1 C3, C2, C1, C0 (Instr Set 1)
// _icon_power = 0x04; // Icon off, Booster on (Instr Set 1)
_icon_power = 0x0C; // Icon on, Booster on (Instr Set 1)
// Saved to allow contrast change at later time
_writeCommand(0x50 | _icon_power | ((_contrast >> 4) & 0x03)); // Set Power, Icon and Contrast, 0 1 0 1 Ion Bon C5 C4 (Instr Set 1)
wait_ms(10); // Wait 10ms to ensure powered up
_writeCommand(0x68 | (LCD_SSD1_RAB & 0x07)); // Set Voltagefollower 0 1 1 0 Don = 1, Ampl ratio Rab2, Rab1, Rab0 = 1 1 0 (Instr Set 1)
wait_ms(10); // Wait 10ms to ensure powered up
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 DL N BE RE(1) REV
// Select Extended Instruction Set 1
_writeCommand(0x10); // Shift/Scroll enable, 0 0 0 1 DS4/HS4 DS3/HS3 DS2/HS2 DS1/HS1 (Ext Instr Set 1)
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS=0 Select Instruction Set 0
// Select Std Instr set, Select IS=0
break; // case SSD1803 Controller
// Note1: The PCF21XX family of controllers has several types that dont have an onboard voltage generator for V-LCD.
// You must supply this LCD voltage externally and not try to enable VGen.
// Note2: The early versions of PCF2116 controllers (eg PCF2116C) can not generate sufficiently negative voltage for the LCD at a VDD of 3V3.
// You must supply this voltage externally and not enable VGen or you must use a higher VDD (e.g. 5V) and enable VGen.
// More recent versions of the controller (eg PCF2116K) have an improved VGen that will work with 3V3.
// Note3: See datasheet, PCF2116 and other types provide a V0 pin to control the LCD contrast voltage that is provided by VGen. This pins allows
// contrast control similar to that of pin 3 on the standard 14pin LCD module connector.
// You can disable VGen by connecting Vo to VDD. VLCD will then be used directly as LCD voltage.
// Note4: PCF2113 and PCF2119 are different wrt to VLCD generator! There is no V0 pin. The contrast voltage is software controlled by setting the VA and VB registers.
// Vgen is automatically switched off when the contrast voltage VA or VB is set to 0x00. Note that certain limits apply to allowed values for VA and VB.
// Note5: See datasheet, members of the PCF21XX family support different numbers of rows/columns. Not all can support 3 or 4 rows.
// Note6: See datasheet, the PCF21XX-C and PCF21XX-K use a non-standard character set. This may result is strange looking text when not corrected..
case PCF2103_3V3:
// PCF2103 controller: No Voltage generator for VLCD, VDD=3V3..5V, VLCD input controls contrast voltage.
// Initialise Display configuration
switch (_type) {
case LCD24x1:
_function = 0x00; //FUNCTION SET 0 0 1 DL=0 4-bit, 0, M=0 1-line/24 chars display mode, 0, H=0
//Note: 4 bit mode is ignored for I2C mode
break;
// case LCD12x1D: //Special mode for PCF21XX, Only top line used
case LCD12x2:
_function = 0x04; //FUNCTION SET 0 0 1 DL=0 4-bit, 0, M=1 2-line/12 chars display mode, 0, H=0
//Note: 4 bit mode is ignored for I2C mode
break;
default:
error("Error: LCD Controller type does not support this Display type\n\r");
break;
} // switch type
_writeCommand(0x20 | _function | 0x01); // Set function, Select Instr Set = 1
wait_ms(10); // Wait 10ms to ensure powered up
// Note: Display from GA628 shows 12 chars. This is actually the right half of a 24x1 display. The commons have been connected in reverse order.
_writeCommand(0x05); // Display Conf Set 0000 0, 1, P=0, Q=1 (Instr. Set 1)
_writeCommand(0x02); // Screen Config 0000 001, L=0 (Instr. Set 1)
_writeCommand(0x08); // ICON Conf 0000 1, IM=0 (Char mode), IB=0 (no Icon blink), 0 (Instr. Set 1)
_writeCommand(0x20 | _function); // Set function, Select Instr Set = 0
#if(0)
// Select CG RAM
_writeCommand(0x40); //Set CG-RAM address, 8 sequential locations needed per UDC
// Store UDC/Icon pattern:
// 3 x 8 rows x 5 bits = 120 bits for Normal pattern (UDC 0..2) and
// 3 x 8 rows x 5 bits = 120 bits for Blink pattern (UDC 4..6)
for (int i=0; i<(8 * 8); i++) {
// _writeData(0x1F); // All On
_writeData(0x00); // All Off
}
#endif
break; // case PCF2103_3V3 Controller
case PCF2113_3V3:
// PCF2113 controller: Initialise Voltage booster for VLCD. VDD=3V3. VA and VB control contrast.
// Initialise Display configuration
switch (_type) {
// case LCD12x1:
// _function = 0x02; // FUNCTION SET 0 0 1 DL=0 4 bit, 0, M=0 1-line/12 chars display mode, SL=1, IS=0
// Note: 4 bit mode is ignored for I2C mode
case LCD24x1:
_function = 0x00; // FUNCTION SET 0 0 1 DL=0 4 bit, 0, M=0 1-line/24 chars display mode, SL=0, IS=0
// Note: 4 bit mode is ignored for I2C mode
break;
case LCD12x2:
_function = 0x04; // FUNCTION SET 0 0 1 DL=0 4 bit, 0, M=1 2-line/12 chars display mode, SL=0, IS=0
break;
default:
error("Error: LCD Controller type does not support this Display type\n\r");
break;
} // switch type
// Init special features
_writeCommand(0x20 | _function | 0x01); // Set function, Select Instr Set = 1
_writeCommand(0x04); // Display Conf Set 0000 0, 1, P=0, Q=0 (Instr. Set 1)
_writeCommand(0x10); // Temp Compensation Set 0001 0, 0, TC1=0, TC2=0 (Instr. Set 1)
// _writeCommand(0x42); // HV GEN 0100 S1=1, S2=0 (2x multiplier) (Instr. Set 1)
_writeCommand(0x40 | (LCD_PCF2_S12 & 0x03)); // HV Gen 0100 S1=1, S2=0 (2x multiplier) (Instr. Set 1)
_contrast = LCD_PCF2_CONTRAST;
_writeCommand(0x80 | 0x00 | (_contrast & 0x3F)); // VLCD_set (Instr. Set 1) 1, V=0, VA=contrast
_writeCommand(0x80 | 0x40 | (_contrast & 0x3F)); // VLCD_set (Instr. Set 1) 1, V=1, VB=contrast
wait_ms(10); // Wait 10ms to ensure powered up
_writeCommand(0x02); // Screen Config 0000 001, L=0 (Instr. Set 1)
_writeCommand(0x08); // ICON Conf 0000 1, IM=0 (Char mode), IB=0 (no icon blink) DM=0 (no direct mode) (Instr. Set 1)
_writeCommand(0x20 | _function); // Set function, Select Instr Set = 0
break; // case PCF2113_3V3 Controller
// case PCF2113_5V:
// PCF2113 controller: No Voltage generator for VLCD. VDD=5V. Contrast voltage controlled by VA or VB.
//@TODO
case PCF2116_3V3:
// PCF2116 controller: Voltage generator for VLCD. VDD=5V. V0 controls contrast voltage.
// Initialise Display configuration
switch (_type) {
// case LCD12x1:
// case LCD12x2:
case LCD24x1:
_writeCommand(0x22); //FUNCTION SET 0 0 1 DL=0 4-bit, N=0/M=0 1-line/24 chars display mode, G=1 Vgen on, 0
//Note: 4 bit mode is ignored for I2C mode
wait_ms(10); // Wait 10ms to ensure powered up
break;
case LCD12x3D: // Special mode for KS0078 and PCF21XX
case LCD12x3D1: // Special mode for PCF21XX
case LCD12x4D: // Special mode for PCF21XX:
_writeCommand(0x2E); //FUNCTION SET 0 0 1 DL=0 4-bit, N=1/M=1 4-line/12 chars display mode, G=1 VGen on, 0
//Note: 4 bit mode is ignored for I2C mode
wait_ms(10); // Wait 10ms to ensure powered up
break;
case LCD24x2:
_writeCommand(0x2A); //FUNCTION SET 0 0 1 DL=0 4-bit, N=1/M=0 2-line/24 chars display mode, G=1 VGen on, 0
//Note: 4 bit mode is ignored for I2C mode
wait_ms(10); // Wait 10ms to ensure powered up
break;
default:
error("Error: LCD Controller type does not support this Display type\n\r");
break;
} // switch type
break; // case PCF2116_3V3 Controller
//Experimental for cellphone 3-line display, SA=0x74, No Ack supported, Character set C or K, DL = 8 bit, N=0,M=1 (reserved mode !!), external VLCD -2V5
//@TODO
case PCF2116_5V:
// PCF2116 controller: No Voltage generator for VLCD. VDD=5V. V0 controls contrast voltage.
// Initialise Display configuration
switch (_type) {
// case LCD12x1:
// case LCD12x2:
// case LCD24x1:
// _writeCommand(0x20); //FUNCTION SET 0 0 1 DL=0 4-bit, N=0/M=0 1-line/24 chars display mode, G=0 no Vgen, 0
//Note: 4 bit mode is ignored for I2C mode
// wait_ms(10); // Wait 10ms to ensure powered up
// break;
case LCD12x3D: // Special mode for KS0078 and PCF21XX
case LCD12x3D1: // Special mode for PCF21XX
case LCD12x4D: // Special mode for PCF21XX:
// _writeCommand(0x34); //FUNCTION SET 8 bit, N=0/M=1 4-line/12 chars display mode OK
// _writeCommand(0x24); //FUNCTION SET 4 bit, N=0/M=1 4-line/12 chars display mode OK
_writeCommand(0x2C); //FUNCTION SET 0 0 1 DL=0 4-bit, N=1/M=1 4-line/12 chars display mode, G=0 no Vgen, 0 OK
//Note: 4 bit mode is ignored for I2C mode
wait_ms(10); // Wait 10ms to ensure powered up
break;
// case LCD24x2:
// _writeCommand(0x28); //FUNCTION SET 4 bit, N=1/M=0 2-line/24 chars display mode
//Note: 4 bit mode is ignored for I2C mode
// wait_ms(10); // Wait 10ms to ensure powered up
// break;
default:
error("Error: LCD Controller type does not support this Display type\n\r");
break;
} // switch type
break; // case PCF2116_5V Controller
case PCF2119_3V3:
// PCF2119 controller: Initialise Voltage booster for VLCD. VDD=3V3. VA and VB control contrast.
// Note1: See datasheet, the PCF2119 supports icons and provides separate constrast control for Icons and characters.
// Note2: Vgen is switched off when the contrast voltage VA or VB is set to 0x00.
//POR or Hardware Reset should be applied
wait_ms(10); // Wait 10ms to ensure powered up
// Initialise Display configuration
switch (_type) {
case LCD8x1:
// case LCD12x1:
case LCD16x1:
_function = 0x02; // FUNCTION SET 0 0 1 DL=0 4-bit, 0 , M=0 1-line/16 chars display mode, SL=1
// Note: 4 bit mode is ignored for I2C mode
break;
case LCD24x1:
// case LCD32x1:
_function = 0x00; // FUNCTION SET 0 0 1 DL=0 4-bit, 0 , M=0 1-line/32 chars display mode, SL=0
// Note: 4 bit mode is ignored for I2C mode
break;
case LCD8x2:
// case LCD12x2:
case LCD16x2:
_function = 0x04; // FUNCTION SET 0 0 1 DL=0 4-bit, 0, M=1 2-line/16 chars display mode, SL=0
// Note: 4 bit mode is ignored for I2C mode
break;
default:
error("Error: LCD Controller type does not support this Display type\n\r");
break;
} // switch type
// Init special features
_writeCommand(0x20 | _function | 0x01); // Set function, Select Instruction Set = 1
_writeCommand(0x04); // DISP CONF SET (Instr. Set 1) 0000, 0, 1, P=0, Q=0
_writeCommand(0x10); // TEMP CTRL SET (Instr. Set 1) 0001, 0, 0, TC1=0, TC2=0
// _writeCommand(0x42); // HV GEN (Instr. Set 1) 0100, 0, 0, S1=1, S2=0 (2x multiplier)
_writeCommand(0x40 | (LCD_PCF2_S12 & 0x03)); // HV GEN (Instr. Set 1) 0100, 0, 0, S1=1, S2=0 (2x multiplier)
_contrast = LCD_PCF2_CONTRAST;
_writeCommand(0x80 | 0x00 | (_contrast & 0x3F)); // VLCD_set (Instr. Set 1) V=0, VA=contrast
_writeCommand(0x80 | 0x40 | (_contrast & 0x3F)); // VLCD_set (Instr. Set 1) V=1, VB=contrast
wait_ms(10); // Wait 10ms to ensure powered up
_writeCommand(0x02); // SCRN CONF (Instr. Set 1) L=0
_writeCommand(0x08); // ICON CONF (Instr. Set 1) IM=0 (Char mode) IB=0 (no icon blink) DM=0 (no direct mode)
_writeCommand(0x20 | _function); // Select Instruction Set = 0
break; // case PCF2119_3V3 Controller
// case PCF2119_5V:
// PCF2119 controller: No Voltage booster for VLCD. VDD=3V3. VA and VB control contrast.
// Note1: See datasheet, the PCF2119 supports icons and provides separate constrast control for Icons and characters.
// Note2: Vgen is switched off when the contrast voltage VA or VB is set to 0x00.
//@TODO
case WS0010:
// WS0010 OLED controller: Initialise DC/DC Voltage converter for LEDs
// Note1: Identical to RS0010
// Note2: supports 1 or 2 lines (and 16x100 graphics)
// supports 4 fonts (English/Japanese (default), Western European-I, English/Russian, Western European-II)
// Cursor/Disp shift set 0001 SC RL 0 0
//
// Mode and Power set 0001 GC PWR 1 1
// GC = 0 (Graph Mode=1, Char Mode=0)
// PWR = 1 (DC/DC On/Off)
//@Todo: This may be needed to enable a warm reboot
//_writeCommand(0x13); // Char mode, DC/DC off
//wait_ms(10); // Wait 10ms to ensure powered down
_writeCommand(0x17); // Char mode, DC/DC on
wait_ms(10); // Wait 10ms to ensure powered up
// Initialise Display configuration
switch (_type) {
case LCD8x1: //8x1 is a regular 1 line display
case LCD8x2B: //8x2B is a special case of 16x1
// case LCD12x1:
case LCD16x1:
case LCD24x1:
_writeCommand(0x20); // Function set 001 DL N F FT1 FT0
// DL=0 (4 bits bus)
// N=0 (1 line)
// F=0 (5x7 dots font)
// FT=00 (00 = Engl/Jap, 01 = WestEur1, 10 = Engl/Russian, 11 = WestEur2
break;
case LCD12x3D: // Special mode for KS0078 and PCF21XX
case LCD12x3D1: // Special mode for PCF21XX
case LCD12x4D: // Special mode for PCF21XX:
case LCD16x3G: // Special mode for ST7036
case LCD24x4D: // Special mode for KS0078
error("Error: LCD Controller type does not support this Display type\n\r");
break;
default:
// All other LCD types are initialised as 2 Line displays (including LCD16x1C and LCD40x4)
_writeCommand(0x28); // Function set 001 DL N F FT1 FT0
// DL=0 (4 bits bus)
// N=1 (2 lines)
// F=0 (5x7 dots font)
// FT=00 (00 = Engl/Jap, 01 = WestEur1, 10 = Engl/Russian, 11 = WestEur2
break;
} // switch type
break; // case WS0010 Controller
case US2066_3V3:
// US2066/SSD1311 OLED controller, Initialise for VDD=3V3
// Note: supports 1,2, 3 or 4 lines
// case USS2066_5V:
// US2066 controller, VDD=5V
// Initialise Display configuration
switch (_type) {
case LCD8x1: //8x1 is a regular 1 line display
case LCD8x2B: //8x2D is a special case of 16x1
// case LCD12x1:
case LCD16x1:
// case LCD20x1:
_function = 0x00; // Set function 0 0 1 X N DH RE(0) IS
// Saved to allow switch between Instruction sets at later time
// DL=X bit is ignored for US2066. Uses hardwired pins instead
// N=0 1 Line / 3 Line
// DH=0 Double Height disable
// IS=0
_function_1 = 0x02; // Set function, 0 0 1 X N BE RE(1) REV
// Saved to allow switch between Instruction sets at later time
// DL=X bit is ignored for US2066. Uses hardwired pins instead
// N=0 1 Line / 3 Line
// BE=0 Blink Enable off, special feature of SSD1803, US2066
// REV=0 Reverse off, special feature of SSD1803, US2066
_lines = 0x00; // Ext function set 0 0 0 0 1 FW BW NW
// NW=0 1-Line LCD (N=0)
break;
case LCD16x1C:
case LCD8x2:
case LCD16x2:
case LCD20x2:
_function = 0x08; // Set function 0 0 1 X N DH RE(0) IS
// Saved to allow switch between Instruction sets at later time
// DL=X bit is ignored for US2066. Uses hardwired pins instead
// N=1 2 line / 4 Line
// DH=0 Double Height disable
// IS=0
_function_1 = 0x0A; // Set function, 0 0 1 X N BE RE(1) REV
// Saved to allow switch between Instruction sets at later time
// DL=X bit is ignored for US2066. Uses hardwired pins instead
// N=1 2 line / 4 Line
// BE=0 Blink Enable off, special feature of SSD1803, US2066
// REV=0 Reverse off, special feature of SSD1803, US2066
_lines = 0x00; // Ext function set 0 0 0 0 1 FW BW NW
// NW=0 2-Line LCD (N=1)
break;
case LCD12x3D: // Special mode for KS0078 and PCF21XX
// case LCD12x3D1: // Special mode for KS0078 and PCF21XX
case LCD16x3D: // Special mode for KS0078, SSD1803 and US2066
// case LCD16x3D1: // Special mode for SSD1803, US2066
// case LCD20x3D: // Special mode for SSD1803, US2066
_function = 0x00; // Set function 0 0 1 X N DH RE(0) IS
// Saved to allow switch between Instruction sets at later time
// DL=X bit is ignored for US2066. Uses hardwired pins instead
// N=0 1 Line / 3 Line
// DH=0 Double Height disable
// IS=0
_function_1 = 0x02; // Set function, 0 0 1 X N BE RE(1) REV
// Saved to allow switch between Instruction sets at later time
// DL=X bit is ignored for US2066. Uses hardwired pins instead
// N=0 1 Line / 3 Line
// BE=0 Blink Enable off, special feature of SSD1803, US2066
// REV=0 Reverse off, special feature of SSD1803, US2066
_lines = 0x00; // Ext function set 0 0 0 0 1 FW BW NW
// NW=1 3-Line LCD (N=0)
break;
case LCD20x4D: // Special mode for SSD1803, US2066
_function = 0x08; // Set function 0 0 1 X N DH RE(0) IS
// Saved to allow switch between Instruction sets at later time
// DL=X bit is ignored for US2066. Uses hardwired pins instead
// N=1 2 line / 4 Line
// DH=0 Double Height disable
// IS=0
_function_1 = 0x0A; // Set function, 0 0 1 DL N BE RE(1) REV
// Saved to allow switch between Instruction sets at later time
// DL=0 bit is ignored for US2066. Uses hardwired pins instead
// N=1 2 line / 4 Line
// BE=0 Blink Enable off, special feature of SSD1803, US2066
// REV=0 Reverse off, special feature of SSD1803, US2066
_lines = 0x01; // Ext function set 0 0 0 0 1 FW BW NW
// NW=1 4-Line LCD (N=1)
break;
// case LCD24x1:
// case LCD16x3G: // Special mode for ST7036
// case LCD24x4D: // Special mode for KS0078
default:
error("Error: LCD Controller type does not support this Display type\n\r");
break;
} // switch type
_writeCommand(0x00); // NOP, make sure to sync SPI
// init special features
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 X N BE RE(1) REV
// Select Extended Instruction Set
_writeCommand(0x71); // Function Select A: 0 1 1 1 0 0 0 1 (Ext Instr Set)
_writeData(0x00); // Disable Internal VDD
_writeCommand(0x79); // Function Select OLED: 0 1 1 1 1 0 0 1 (Ext Instr Set)
_writeCommand(0xD5); // Display Clock Divide Ratio: 1 1 0 1 0 1 0 1 (Ext Instr Set, OLED Instr Set)
_writeCommand(0x70); // Display Clock Divide Ratio value: 0 1 1 1 0 0 0 0 (Ext Instr Set, OLED Instr Set)
_writeCommand(0x78); // Function Disable OLED: 0 1 1 1 1 0 0 0 (Ext Instr Set)
// _writeCommand(0x06); // Set ext entry mode, 0 0 0 0 0 1 BDC=1 COM1-32, BDS=0 SEG100-1 "Bottom View" (Ext Instr Set)
_writeCommand(0x05); // Set ext entry mode, 0 0 0 0 0 1 BDC=0 COM32-1, BDS=1 SEG1-100 "Top View" (Ext Instr Set)
_writeCommand(0x08 | _lines); // Set ext function 0 0 0 0 1 FW BW NW 1,2,3 or 4 lines (Ext Instr Set)
// _writeCommand(0x1C); // Double Height, 0 0 0 1 UD2=1, UD1=1, X, DH'=0 (Ext Instr Set)
// // Default
_writeCommand(0x72); // Function Select B: 0 1 1 1 0 0 1 0 (Ext Instr Set)
_writeData(0x01); // Select ROM A (CGRAM 8, CGROM 248)
_writeCommand(0x79); // Function Select OLED: 0 1 1 1 1 0 0 1 (Ext Instr Set)
_writeCommand(0xDA); // Set Segm Pins Config: 1 1 0 1 1 0 1 0 (Ext Instr Set, OLED)
_writeCommand(0x10); // Set Segm Pins Config value: Altern Odd/Even, Disable Remap (Ext Instr Set, OLED)
_writeCommand(0xDC); // Function Select C: 1 1 0 1 1 1 0 0 (Ext Instr Set, OLED)
// _writeCommand(0x00); // Set internal VSL, GPIO pin HiZ (always read low)
_writeCommand(0x80); // Set external VSL, GPIO pin HiZ (always read low)
_contrast = LCD_US20_CONTRAST;
_writeCommand(0x81); // Set Contrast Control: 1 0 0 0 0 0 0 1 (Ext Instr Set, OLED)
_writeCommand((_contrast << 2) | 0x03); // Set Contrast Value: 8 bits, use 6 bits for compatibility
_writeCommand(0xD9); // Set Phase Length: 1 1 0 1 1 0 0 1 (Ext Instr Set, OLED)
_writeCommand(0xF1); // Set Phase Length Value:
_writeCommand(0xDB); // Set VCOMH Deselect Lvl: 1 1 0 1 1 0 1 1 (Ext Instr Set, OLED)
_writeCommand(0x30); // Set VCOMH Deselect Value: 0.83 x VCC
wait_ms(10); // Wait 10ms to ensure powered up
//Test Fade/Blinking. Hard Blink on/off, No fade in/out ??
// _writeCommand(0x23); // Set (Ext Instr Set, OLED)
// _writeCommand(0x3F); // Set interval 128 frames
//End Test Blinking
_writeCommand(0x78); // Function Disable OLED: 0 1 1 1 1 0 0 0 (Ext Instr Set)
_writeCommand(0x20 | _function | 0x01); // Set function, 0 0 1 X N DH RE(0) IS=1 Select Instruction Set 1
// Select Std Instr set, Select IS=1
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 X N BE RE(1) REV
// Select Ext Instr Set, IS=1
_writeCommand(0x10); // Shift/Scroll enable, 0 0 0 1 DS4/HS4 DS3/HS3 DS2/HS2 DS1/HS1 (Ext Instr Set, IS=1)
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS=0 Select Instruction Set 0
// Select Std Instr set, Select IS=0
break; // case US2066/SSD1311 Controller
//not yet tested on hardware
case PT6314 :
// Initialise Display configuration
switch (_type) {
case LCD8x1: //8x1 is a regular 1 line display
case LCD8x2B: //8x2B is a special case of 16x1
// case LCD12x1:
case LCD16x1:
case LCD20x1:
case LCD24x1:
_function = 0x00; // Function set 001 DL N X BR1 BR0
// DL=0 (4 bits bus)
// Note: 4 bit mode is ignored for native SPI and I2C devices
// N=0 (1 line)
// X
// BR1=0 (2 significant bits for brightness
// BR0=0
// 0x0 = 100%
// 0x1 = 75%
// 0x2 = 50%
// 0x3 = 25%
break;
// All other valid LCD types are initialised as 2 Line displays
case LCD8x2:
case LCD16x2:
case LCD20x2:
case LCD24x2:
_function = 0x08; // Function set 001 DL N X BR1 BR2
// DL=0 (4 bits bus)
// Note: 4 bit mode is ignored for native SPI and I2C devices
// N=1 (2 lines)
// X
// BR1=0 (2 significant bits for brightness
// BR0=0
break;
default:
error("Error: LCD Controller type does not support this Display type\n\r");
break;
} // switch type
_contrast = LCD_PT63_CONTRAST;
_writeCommand(0x20 | _function | ((~_contrast) >> 4)); // Invert and shift to use 2 MSBs
break; // case PT6314 Controller (VFD)
case ST7066_ACM: // ST7066 4/8 bit, I2C on ACM1602 using a PIC
default:
// Devices fully compatible to HD44780 that do not use any DC/DC Voltage converters but external VLCD, no icons etc
// Initialise Display configuration
switch (_type) {
case LCD8x1: //8x1 is a regular 1 line display
case LCD8x2B: //8x2B is a special case of 16x1
// case LCD12x1:
case LCD16x1:
// case LCD20x1:
case LCD24x1:
// case LCD40x1:
_function = 0x00; // Function set 001 DL N F - -
// DL=0 (4 bits bus)
// N=0 (1 line)
// F=0 (5x7 dots font)
break;
case LCD12x3D: // Special mode for KS0078 and PCF21XX
case LCD12x3D1: // Special mode for KS0078 and PCF21XX
case LCD12x4D: // Special mode for KS0078 and PCF21XX:
case LCD16x3D: // Special mode for KS0078
// case LCD16x3D1: // Special mode for KS0078
// case LCD24x3D: // Special mode for KS0078
// case LCD24x3D1: // Special mode for KS0078
case LCD24x4D: // Special mode for KS0078
error("Error: LCD Controller type does not support this Display type\n\r");
break;
// All other LCD types are initialised as 2 Line displays (including LCD16x1C and LCD40x4)
default:
_function = 0x08; // Function set 001 DL N F - -
// DL=0 (4 bits bus)
// Note: 4 bit mode is ignored for native SPI and I2C devices
// N=1 (2 lines)
// F=0 (5x7 dots font, only option for 2 line display)
// - (Don't care)
break;
} // switch type
_writeCommand(0x20 | _function);
break; // case default Controller
} // switch Controller specific initialisations
// Controller general initialisations
// _writeCommand(0x01); // cls, and set cursor to 0
// wait_ms(10); // The CLS command takes 1.64 ms.
// // Since we are not using the Busy flag, Lets be safe and take 10 ms
_writeCommand(0x02); // Return Home
// Cursor Home, DDRAM Address to Origin
_writeCommand(0x06); // Entry Mode 0000 0 1 I/D S
// Cursor Direction and Display Shift
// I/D=1 (Cur incr)
// S=0 (No display shift)
_writeCommand(0x14); // Cursor or Display shift 0001 S/C R/L x x
// S/C=0 Cursor moves
// R/L=1 Right
//
// _writeCommand(0x0C); // Display Ctrl 0000 1 D C B
// // Display On, Cursor Off, Blink Off
setCursor(CurOff_BlkOff);
setMode(DispOn);
}
/** Clear the screen, Cursor home.
*/
void TextLCD_Base::cls() {
// Select and configure second LCD controller when needed
if(_type==LCD40x4) {
_ctrl_idx=_LCDCtrl_1; // Select 2nd controller
// Second LCD controller Cursor always Off
_setCursorAndDisplayMode(_currentMode, CurOff_BlkOff);
// Second LCD controller Clearscreen
_writeCommand(0x01); // cls, and set cursor to 0
wait_ms(10); // The CLS command takes 1.64 ms.
// Since we are not using the Busy flag, Lets be safe and take 10 ms
_ctrl_idx=_LCDCtrl_0; // Select primary controller
}
// Primary LCD controller Clearscreen
_writeCommand(0x01); // cls, and set cursor to 0
wait_ms(10); // The CLS command takes 1.64 ms.
// Since we are not using the Busy flag, Lets be safe and take 10 ms
// Restore cursormode on primary LCD controller when needed
if(_type==LCD40x4) {
_setCursorAndDisplayMode(_currentMode,_currentCursor);
}
setAddress(0, 0); // Reset Cursor location
// Note: This is needed because some displays (eg PCF21XX) don't use line 0 in the '3 Line' mode.
}
/** Locate cursor to a screen column and row
*
* @param column The horizontal position from the left, indexed from 0
* @param row The vertical position from the top, indexed from 0
*/
void TextLCD_Base::locate(int column, int row) {
// setAddress() does all the heavy lifting:
// check column and row sanity,
// switch controllers for LCD40x4 if needed
// switch cursor for LCD40x4 if needed
// set the new memory address to show cursor at correct location
setAddress(column, row);
}
/** Write a single character (Stream implementation)
*/
int TextLCD_Base::_putc(int value) {
int addr;
if (value == '\n') {
//No character to write
//Update Cursor
_column = 0;
_row++;
if (_row >= rows()) {
_row = 0;
}
}
else {
//Character to write
#if (LCD_DEFAULT_FONT == 1)
_writeData(value);
#else
_writeData(ASCII_2_LCD(value));
#endif
//Update Cursor
_column++;
if (_column >= columns()) {
_column = 0;
_row++;
if (_row >= rows()) {
_row = 0;
}
}
} //else
//Set next memoryaddress, make sure cursor blinks at next location
addr = getAddress(_column, _row);
_writeCommand(0x80 | addr);
return value;
}
// get a single character (Stream implementation)
int TextLCD_Base::_getc() {
return -1;
}
/** Convert ASCII character code to the LCD fonttable code
*
* @param c The character to write to the display
* @return The character code for the specific fonttable of the controller
*/
int TextLCD_Base::ASCII_2_LCD (int c) {
//LCD_C_FT0 is default for HD44780 and compatible series
if (_font == LCD_C_FT0) return c;
//LCD_C_FT1 for PCF21XXC series
//Used code from Suga koubou library for PCF2119
if (((c >= ' ') && (c <= '?')) || ((c >= 'A') && (c <= 'Z')) || ((c >= 'a') && (c <= 'z'))) {
c |= 0x80;
} else if (c >= 0xf0 && c <= 0xff) {
c &= 0x0f;
}
return c;
//LCD_C_FT2 ...
//@TODO add more, eg cyrillic
//@TODO add method to switch between fonts for controllers that support this
}
#if(LCD_PRINTF != 1)
/** Write a character to the LCD
*
* @param c The character to write to the display
*/
int TextLCD_Base::putc(int c){
return _putc(c);
}
/** Write a raw string to the LCD
*
* @param string text, may be followed by variables to emulate formatting the string.
* However, printf formatting is NOT supported and variables will be ignored!
*/
int TextLCD_Base::printf(const char* text, ...) {
while (*text !=0) {
_putc(*text);
text++;
}
return 0;
}
#endif
// Write a nibble using the 4-bit interface
void TextLCD_Base::_writeNibble(int value) {
// Enable is Low
this->_setEnable(true);
this->_setData(value); // Low nibble of value on D4..D7
wait_us(1); // Data setup time
this->_setEnable(false);
wait_us(1); // Datahold time
// Enable is Low
}
// Write a byte using the 4-bit interface
void TextLCD_Base::_writeByte(int value) {
// Enable is Low
this->_setEnable(true);
this->_setData(value >> 4); // High nibble
wait_us(1); // Data setup time
this->_setEnable(false);
wait_us(1); // Data hold time
this->_setEnable(true);
this->_setData(value); // Low nibble
wait_us(1); // Data setup time
this->_setEnable(false);
wait_us(1); // Datahold time
// Enable is Low
}
// Write a command byte to the LCD controller
void TextLCD_Base::_writeCommand(int command) {
this->_setRS(false);
wait_us(1); // Data setup time for RS
this->_writeByte(command);
wait_us(40); // most instructions take 40us
}
// Write a data byte to the LCD controller
void TextLCD_Base::_writeData(int data) {
this->_setRS(true);
wait_us(1); // Data setup time for RS
this->_writeByte(data);
wait_us(40); // data writes take 40us
}
// This replaces the original _address() method.
// It is confusing since it returns the memoryaddress or-ed with the set memorycommand 0x80.
// Left it in here for compatibility with older code. New applications should use getAddress() instead.
int TextLCD_Base::_address(int column, int row) {
return 0x80 | getAddress(column, row);
}
// This is new method to return the memory address based on row, column and displaytype.
//
/** Return the memoryaddress of screen column and row location
*
* @param column The horizontal position from the left, indexed from 0
* @param row The vertical position from the top, indexed from 0
* @return The memoryaddress of screen column and row location
*
*/
int TextLCD_Base::getAddress(int column, int row) {
switch (_addr_mode) {
case LCD_T_A:
//Default addressing mode for 1, 2 and 4 rows (except 40x4)
//The two available rows are split and stacked on top of eachother. Addressing for 3rd and 4th line continues where lines 1 and 2 were split.
//Displays top rows when less than four are used.
switch (row) {
case 0:
return 0x00 + column;
case 1:
return 0x40 + column;
case 2:
return 0x00 + _nr_cols + column;
case 3:
return 0x40 + _nr_cols + column;
// Should never get here.
default:
return 0x00;
}
case LCD_T_B:
// LCD8x2B is a special layout of LCD16x1
if (row==0)
return 0x00 + column;
else
// return _nr_cols + column;
return 0x08 + column;
case LCD_T_C:
// LCD16x1C is a special layout of LCD8x2
// LCD32x1C is a special layout of LCD16x2
// LCD40x1C is a special layout of LCD20x2
#if(0)
if (column < 8)
return 0x00 + column;
else
return 0x40 + (column - 8);
#else
if (column < (_nr_cols >> 1))
return 0x00 + column;
else
return 0x40 + (column - (_nr_cols >> 1));
#endif
// Not sure about this one, seems wrong.
// Left in for compatibility with original library
// case LCD16x2B:
// return 0x00 + (row * 40) + column;
case LCD_T_D:
//Alternate addressing mode for 3 and 4 row displays (except 40x4). Used by PCF21XX, KS0073, KS0078, SSD1803
//The 4 available rows start at a hardcoded address.
//Displays top rows when less than four are used.
switch (row) {
case 0:
return 0x00 + column;
case 1:
return 0x20 + column;
case 2:
return 0x40 + column;
case 3:
return 0x60 + column;
// Should never get here.
default:
return 0x00;
}
case LCD_T_D1:
//Alternate addressing mode for 3 row displays. Used by PCF21XX, KS0073, KS0078, SSD1803
//The 4 available rows start at a hardcoded address.
//Skips top row of 4 row display and starts display at row 1
switch (row) {
case 0:
return 0x20 + column;
case 1:
return 0x40 + column;
case 2:
return 0x60 + column;
// Should never get here.
default:
return 0x00;
}
case LCD_T_E:
// LCD40x4 is a special case since it has 2 controllers.
// Each controller is configured as 40x2 (Type A)
if (row<2) {
// Test to see if we need to switch between controllers
if (_ctrl_idx != _LCDCtrl_0) {
// Second LCD controller Cursor Off
_setCursorAndDisplayMode(_currentMode, CurOff_BlkOff);
// Select primary controller
_ctrl_idx = _LCDCtrl_0;
// Restore cursormode on primary LCD controller
_setCursorAndDisplayMode(_currentMode, _currentCursor);
}
return 0x00 + (row * 0x40) + column;
}
else {
// Test to see if we need to switch between controllers
if (_ctrl_idx != _LCDCtrl_1) {
// Primary LCD controller Cursor Off
_setCursorAndDisplayMode(_currentMode, CurOff_BlkOff);
// Select secondary controller
_ctrl_idx = _LCDCtrl_1;
// Restore cursormode on secondary LCD controller
_setCursorAndDisplayMode(_currentMode, _currentCursor);
}
return 0x00 + ((row-2) * 0x40) + column;
}
case LCD_T_F:
//Alternate addressing mode for 3 row displays.
//The first half of 3rd row continues from 1st row, the second half continues from 2nd row.
switch (row) {
case 0:
return 0x00 + column;
case 1:
return 0x40 + column;
case 2:
if (column < (_nr_cols >> 1)) // check first or second half of line
return (0x00 + _nr_cols + column);
else
return (0x40 + _nr_cols + (column - (_nr_cols >> 1)));
// Should never get here.
default:
return 0x00;
}
case LCD_T_G:
//Alternate addressing mode for 3 row displays. Used by ST7036
switch (row) {
case 0:
return 0x00 + column;
case 1:
return 0x10 + column;
case 2:
return 0x20 + column;
// Should never get here.
default:
return 0x00;
}
// Should never get here.
default:
return 0x00;
} // switch _addr_mode
}
/** Set the memoryaddress of screen column and row location
*
* @param column The horizontal position from the left, indexed from 0
* @param row The vertical position from the top, indexed from 0
*/
void TextLCD_Base::setAddress(int column, int row) {
// Sanity Check column
if (column < 0) {
_column = 0;
}
else if (column >= _nr_cols) {
_column = _nr_cols - 1;
} else _column = column;
// Sanity Check row
if (row < 0) {
_row = 0;
}
else if (row >= _nr_rows) {
_row = _nr_rows - 1;
} else _row = row;
// Compute the memory address
// For LCD40x4: switch controllers if needed
// switch cursor if needed
int addr = getAddress(_column, _row);
_writeCommand(0x80 | addr);
}
/** Return the number of columns
*
* @return The number of columns
*
* Note: some configurations are commented out because they have not yet been tested due to lack of hardware
*/
int TextLCD_Base::columns() {
// Columns encoded in b7..b0
//return (_type & 0xFF);
return _nr_cols;
}
/** Return the number of rows
*
* @return The number of rows
*
* Note: some configurations are commented out because they have not yet been tested due to lack of hardware
*/
int TextLCD_Base::rows() {
// Rows encoded in b15..b8
//return ((_type >> 8) & 0xFF);
return _nr_rows;
}
/** Set the Cursormode
*
* @param cursorMode The Cursor mode (CurOff_BlkOff, CurOn_BlkOff, CurOff_BlkOn, CurOn_BlkOn)
*/
void TextLCD_Base::setCursor(LCDCursor cursorMode) {
// Save new cursor mode, needed when 2 controllers are in use or when display is switched off/on
_currentCursor = cursorMode;
// Configure only current LCD controller
_setCursorAndDisplayMode(_currentMode, _currentCursor);
}
/** Set the Displaymode
*
* @param displayMode The Display mode (DispOff, DispOn)
*/
void TextLCD_Base::setMode(LCDMode displayMode) {
// Save new displayMode, needed when 2 controllers are in use or when cursor is changed
_currentMode = displayMode;
// Select and configure second LCD controller when needed
if(_type==LCD40x4) {
if (_ctrl_idx==_LCDCtrl_0) {
// Configure primary LCD controller
_setCursorAndDisplayMode(_currentMode, _currentCursor);
// Select 2nd controller
_ctrl_idx=_LCDCtrl_1;
// Configure secondary LCD controller
_setCursorAndDisplayMode(_currentMode, CurOff_BlkOff);
// Restore current controller
_ctrl_idx=_LCDCtrl_0;
}
else {
// Select primary controller
_ctrl_idx=_LCDCtrl_0;
// Configure primary LCD controller
_setCursorAndDisplayMode(_currentMode, CurOff_BlkOff);
// Restore current controller
_ctrl_idx=_LCDCtrl_1;
// Configure secondary LCD controller
_setCursorAndDisplayMode(_currentMode, _currentCursor);
}
}
else {
// Configure primary LCD controller
_setCursorAndDisplayMode(_currentMode, _currentCursor);
}
}
/** Low level method to restore the cursortype and display mode for current controller
*/
void TextLCD_Base::_setCursorAndDisplayMode(LCDMode displayMode, LCDCursor cursorType) {
// Configure current LCD controller
switch (_ctrl) {
case ST7070:
//ST7070 does not support Cursorblink. The P bit selects the font instead !
_writeCommand(0x08 | displayMode | (cursorType & 0x02));
break;
default:
_writeCommand(0x08 | displayMode | cursorType);
break;
} //switch
}
/** Set the Backlight mode
*
* @param backlightMode The Backlight mode (LightOff, LightOn)
*/
void TextLCD_Base::setBacklight(LCDBacklight backlightMode) {
#if (BACKLIGHT_INV==0)
// Positive Backlight control pin logic
if (backlightMode == LightOn) {
this->_setBL(true);
}
else {
this->_setBL(false);
}
#else
// Inverted Backlight control pin logic
if (backlightMode == LightOn) {
this->_setBL(false);
}
else {
this->_setBL(true);
}
#endif
}
/** Set User Defined Characters
*
* @param unsigned char c The Index of the UDC (0..7) for HD44780 or clones and (0..15) for some more advanced controllers
* @param char *udc_data The bitpatterns for the UDC (8 bytes of 5 significant bits for bitpattern and 3 bits for blinkmode (advanced types))
*/
void TextLCD_Base::setUDC(unsigned char c, char *udc_data) {
// Select and configure second LCD controller when needed
if(_type==LCD40x4) {
_LCDCtrl_Idx current_ctrl_idx = _ctrl_idx; // Temp save current controller
// Select primary controller
_ctrl_idx=_LCDCtrl_0;
// Configure primary LCD controller
_setUDC(c, udc_data);
// Select 2nd controller
_ctrl_idx=_LCDCtrl_1;
// Configure secondary LCD controller
_setUDC(c, udc_data);
// Restore current controller
_ctrl_idx=current_ctrl_idx;
}
else {
// Configure primary LCD controller
_setUDC(c, udc_data);
}
}
/** Low level method to store user defined characters for current controller
*
* @param unsigned char c The Index of the UDC (0..7) for HD44780 clones and (0..15) for some more advanced controllers
* @param char *udc_data The bitpatterns for the UDC (8 bytes of 5 significant bits for bitpattern and 3 bits for blinkmode (advanced types))
*/
void TextLCD_Base::_setUDC(unsigned char c, char *udc_data) {
switch (_ctrl) {
case PCF2103_3V3 : // Some UDCs may be used for Icons
case PCF2113_3V3 : // Some UDCs may be used for Icons
case PCF2116_3V3 :
case PCF2116_5V :
case PCF2119_3V3 : // Some UDCs may be used for Icons
c = c & 0x0F; // mask down to valid range
break;
default:
c = c & 0x07; // mask down to valid range
break;
} //switch _ctrl
// Select DD RAM for current LCD controller
// This is needed to correctly set Bit 6 of the addresspointer for controllers that support 16 UDCs
_writeCommand(0x80 | ((c << 3) & 0x40)) ;
// Select CG RAM for current LCD controller
_writeCommand(0x40 | ((c << 3) & 0x3F)); //Set CG-RAM address, (note that Bit 6 is retained and can not be set by this command !)
//8 sequential locations needed per UDC
// Store UDC pattern
for (int i=0; i<8; i++) {
_writeData(*udc_data++);
}
//Select DD RAM again for current LCD controller and restore the addresspointer
int addr = getAddress(_column, _row);
_writeCommand(0x80 | addr);
}
/** Set UDC Blink and Icon blink
* setUDCBlink method is supported by some compatible devices (eg SSD1803)
*
* @param blinkMode The Blink mode (BlinkOff, BlinkOn)
*/
void TextLCD_Base::setUDCBlink(LCDBlink blinkMode){
// Blinking UDCs (and icons) are enabled when a specific controlbit (BE) is set.
// The blinking pixels in the UDC and icons can be controlled by setting additional bits in the UDC or icon bitpattern.
// UDCs are defined by an 8 byte bitpattern. The P0..P4 form the character pattern.
// P7 P6 P5 P4 P3 P2 P1 P0
// 0 B1 B0 x 0 1 1 1 0
// 1 B1 B0 x 1 0 0 0 1
// .............
// 7 B1 B0 x 1 0 0 0 1
//
// Bit 6 and Bit 7 in the pattern will control the blinking mode when Blink is enabled through BE.
// B1 B0 Mode
// 0 0 No Blinking in this row of the UDC
// 0 1 Enabled pixels in P4 will blink
// 1 x Enabled pixels in P0..P4 will blink
//
// Note: the PCF2103 and PCF2113 use UDCs to set Icons
// 3 x 8 rows x 5 bits = 120 bits Icons for Normal pattern (UDC 0..2) and
// 3 x 8 rows x 5 bits = 120 bits Icons for Blink pattern (UDC 4..6)
// Note: the PCF2119 uses UDCs to set Icons
// 4 x 8 rows x 5 bits = 160 bits Icons for Normal pattern (UDC 0..3) and
// 4 x 8 rows x 5 bits = 160 bits Icons for Blink pattern (UDC 4..7)
switch (blinkMode) {
case BlinkOn:
// Controllers that support UDC/Icon Blink
switch (_ctrl) {
case KS0073 :
case KS0078 :
_function_1 |= 0x02; // Enable UDC/Icon Blink
_writeCommand(0x20 | _function_1); // Function set 0 0 1 DL N RE(1) BE 0/LP (Ext Regs)
_writeCommand(0x20 | _function); // Function set 0 0 1 DL N RE(0) DH REV (Std Regs)
break; // case KS0073, KS0078 Controller
case US2066_3V3 :
case SSD1803_3V3 :
_function_1 |= 0x04; // Enable UDC/Icon Blink
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 DL N BE RE(1) REV
// Select Ext Instr Set
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS=0 Select Instruction Set 0
// Select Std Instr set, Select IS=0
break; // case SSD1803, US2066
case PCF2103_3V3 :
case PCF2113_3V3 :
case PCF2119_3V3 :
// Enable Icon Blink
_writeCommand(0x20 | _function | 0x01); // Set function, Select Instr Set = 1
_writeCommand(0x08 | 0x02); // ICON Conf 0000 1, IM=0 (Char mode), IB=1 (Icon blink), 0 (Instr. Set 1)
_writeCommand(0x20 | _function); // Set function, Select Instr Set = 0
break;
default:
//Unsupported feature for other controllers
break;
} //switch _ctrl
break; // BlinkOn
case BlinkOff:
// Controllers that support UDC Blink
switch (_ctrl) {
case KS0073 :
case KS0078 :
_function_1 &= ~0x02; // Disable UDC/Icon Blink
_writeCommand(0x20 | _function_1); // Function set 0 0 1 DL N RE(1) BE 0/LP (Ext Regs)
_writeCommand(0x20 | _function); // Function set 0 0 1 DL N RE(0) DH REV (Std Regs)
break; // case KS0073, KS0078 Controller
case US2066_3V3 :
case SSD1803_3V3 :
_function_1 &= ~0x04; // Disable UDC/Icon Blink
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 DL N BE RE(1) REV
// Select Ext Instr Set
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS=0 Select Instruction Set 0
// Select Std Instr set, Select IS=0
break; // case SSD1803, US2066
case PCF2103_3V3 :
case PCF2113_3V3 :
case PCF2119_3V3 :
// Disable Icon Blink
_writeCommand(0x20 | _function | 0x01); // Set function, Select Instr Set = 1
_writeCommand(0x08); // ICON Conf 0000 1, IM=0 (Char mode), IB=1 (Icon blink), 0 (Instr. Set 1)
_writeCommand(0x20 | _function); // Set function, Select Instr Set = 0
break;
default:
//Unsupported feature for other controllers
break;
} //switch _ctrl
break; //BlinkOff
default:
break;
} // blinkMode
} // setUDCBlink()
/** Set Contrast
* setContrast method is supported by some compatible devices (eg ST7032i) that have onboard LCD voltage generation
* Initial code for ST70XX imported from fork by JH1PJL
*
* @param unsigned char c contrast data (6 significant bits, valid range 0..63, Value 0 will disable the Vgen)
* @return none
*/
//@TODO Add support for 40x4 dual controller
void TextLCD_Base::setContrast(unsigned char c) {
// Function set mode stored during Init. Make sure we dont accidentally switch between 1-line and 2-line mode!
// Icon/Booster mode stored during Init. Make sure we dont accidentally change this!
_contrast = c & 0x3F; // Sanity check
switch (_ctrl) {
case PCF2113_3V3 :
case PCF2119_3V3 :
if (_contrast < 5) _contrast = 0; // See datasheet. Sanity check for PCF2113/PCF2119
if (_contrast > 55) _contrast = 55;
_writeCommand(0x20 | _function | 0x01); // Set function, Select Instruction Set = 1
_writeCommand(0x80 | 0x00 | (_contrast & 0x3F)); // VLCD_set (Instr. Set 1) V=0, VA=contrast
_writeCommand(0x80 | 0x40 | (_contrast & 0x3F)); // VLCD_set (Instr. Set 1) V=1, VB=contrast
_writeCommand(0x20 | _function); // Select Instruction Set = 0
break;
case ST7032_3V3 :
case ST7032_5V :
case ST7036_3V3 :
// case ST7036_5V :
case SSD1803_3V3 :
_writeCommand(0x20 | _function | 0x01); // Select Instruction Set = 1
_writeCommand(0x70 | (_contrast & 0x0F)); // Contrast Low bits
_writeCommand(0x50 | _icon_power | ((_contrast >> 4) & 0x03)); // Contrast High bits
_writeCommand(0x20 | _function); // Select Instruction Set = 0
break;
case US2066_3V3 :
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 DL N BE RE(1) REV
// Select Extended Instruction Set
_writeCommand(0x79); // Function Select OLED: 0 1 1 1 1 0 0 1 (Ext Instr Set)
_writeCommand(0x81); // Set Contrast Control: 1 0 0 0 0 0 0 1 (Ext Instr Set, OLED)
_writeCommand((_contrast << 2) | 0x03); // Set Contrast Value: 8 bits. Use 6 bits for compatibility
_writeCommand(0x78); // Function Disable OLED: 0 1 1 1 1 0 0 0 (Ext Instr Set)
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS=0 Select Instruction Set 0
// Select Std Instr set, Select IS=0
break;
//not yet tested on hardware
case PT6314 :
// Only 2 significant bits
// 0x00 = 100%
// 0x01 = 75%
// 0x02 = 50%
// 0x03 = 25%
_writeCommand(0x20 | _function | ((~_contrast) >> 4)); // Invert and shift to use 2 MSBs
break;
default:
//Unsupported feature for other controllers
break;
} // end switch
} // end setContrast()
/** Set Power
* setPower method is supported by some compatible devices (eg SSD1803) that have power down modes
*
* @param bool powerOn Power on/off
* @return none
*/
//@TODO Add support for 40x4 dual controller
void TextLCD_Base::setPower(bool powerOn) {
if (powerOn) {
// Switch on
setMode(DispOn);
// Controllers that supports specific Power Down mode
switch (_ctrl) {
// case PCF2113_3V3 :
// case PCF2119_3V3 :
// case ST7032_3V3 :
//@todo
// enable Booster Bon
case WS0010:
_writeCommand(0x17); // Char mode, DC/DC on
wait_ms(10); // Wait 10ms to ensure powered up
break;
case KS0073:
case KS0078:
case SSD1803_3V3 :
// case SSD1803_5V :
_writeCommand(0x20 | _function_1); // Select Ext Instr Set
_writeCommand(0x02); // Power On
_writeCommand(0x20 | _function); // Select Std Instr Set
break;
default:
//Unsupported feature for other controllers
break;
} // end switch
}
else {
// Switch off
setMode(DispOff);
// Controllers that support specific Power Down mode
switch (_ctrl) {
// case PCF2113_3V3 :
// case PCF2119_3V3 :
// case ST7032_3V3 :
//@todo
// disable Booster Bon
case WS0010:
_writeCommand(0x13); // Char mode, DC/DC off
break;
case KS0073:
case KS0078:
case SSD1803_3V3 :
// case SSD1803_5V :
_writeCommand(0x20 | _function_1); // Select Ext Instr Set
_writeCommand(0x03); // Power Down
_writeCommand(0x20 | _function); // Select Std Instr Set
break;
default:
//Unsupported feature for other controllers
break;
} // end switch
}
} // end setPower()
/** Set Orient
* setOrient method is supported by some compatible devices (eg SSD1803, US2066) that have top/bottom view modes
*
* @param LCDOrient orient Orientation
* @return none
*/
void TextLCD_Base::setOrient(LCDOrient orient){
switch (orient) {
case Top:
switch (_ctrl) {
case PCF2103_3V3:
case PCF2116_3V3:
case PCF2116_5V:
case PCF2119_3V3:
_writeCommand(0x20 | _function | 0x01); // Set function, Select Instr Set = 1
_writeCommand(0x05); // Display Conf Set 0000 0, 1, P=0, Q=1 (Instr. Set 1)
_writeCommand(0x20 | _function); // Set function, Select Instr Set = 0
break;
case SSD1803_3V3 :
// case SSD1803_5V :
case US2066_3V3 :
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 X N BE RE(1) REV
// Select Extended Instruction Set
// _writeCommand(0x06); // Set ext entry mode, 0 0 0 0 0 1 BDC=1 COM1-32, BDS=0 SEG100-1 "Bottom View" (Ext Instr Set)
_writeCommand(0x05); // Set ext entry mode, 0 0 0 0 0 1 BDC=0 COM32-1, BDS=1 SEG1-100 "Top View" (Ext Instr Set)
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS=0 Select Instruction Set 0
// Select Std Instr set, Select IS=0
break;
case ST7070:
_writeCommand(0x20 | _function | 0x04); // Set function, 0 0 1 DL, N, EXT=1, x, x (Select Instr Set = 1)
_writeCommand(0x40 | 0x00); // COM/SEG directions 0 1 0 0 C1, C2, S1, S2 (Instr Set 1)
// C1=1: Com1-8 -> Com8-1; C2=1: Com9-16 -> Com16-9
// S1=1: Seg1-40 -> Seg40-1; S2=1: Seg41-80 -> Seg80-41
wait_ms(5); // Wait to ensure completion or ST7070 fails to set Top/Bottom after reset..
_writeCommand(0x20 | _function); // Set function, EXT=0 (Select Instr Set = 0)
break; // case ST7070 Controller
default:
//Unsupported feature for other controllers
break;
} // end switch _ctrl
break; // end Top
case Bottom:
switch (_ctrl) {
case PCF2103_3V3:
case PCF2116_3V3:
case PCF2116_5V:
case PCF2119_3V3:
_writeCommand(0x20 | _function | 0x01); // Set function, Select Instr Set = 1
_writeCommand(0x06); // Display Conf Set 0000 0, 1, P=1, Q=0 (Instr. Set 1)
_writeCommand(0x20 | _function); // Set function, Select Instr Set = 0
break;
case SSD1803_3V3 :
// case SSD1803_5V :
case US2066_3V3 :
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 X N BE RE(1) REV
// Select Extended Instruction Set
_writeCommand(0x06); // Set ext entry mode, 0 0 0 0 0 1 BDC=1 COM1-32, BDS=0 SEG100-1 "Bottom View" (Ext Instr Set)
// _writeCommand(0x05); // Set ext entry mode, 0 0 0 0 0 1 BDC=0 COM32-1, BDS=1 SEG1-100 "Top View" (Ext Instr Set)
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS=0 Select Instruction Set 0
// Select Std Instr set, Select IS=0
break;
case ST7070:
//Note: this does not result in correct top/bottom view.
//The left and right half of each row are reversed and the addressing of both rows is also incorrect:
//Top/bottomline when orientation is flipped:
// 0x48...0x4F 0x40...0x47
// 0x08...0x0F 0x00...0x07
_writeCommand(0x20 | _function | 0x04); // Set function, 0 0 1 DL N EXT=1 x x (Select Instr Set = 1)
_writeCommand(0x40 | 0x0F); // COM/SEG directions 0 1 0 0 C1, C2, S1, S2 (Instr Set 1)
// C1=1: Com1-8 -> Com8-1; C2=1: Com9-16 -> Com16-9
// S1=1: Seg1-40 -> Seg40-1; S2=1: Seg41-80 -> Seg80-41
wait_ms(5); // Wait to ensure completion or ST7070 fails to set Top/Bottom after reset..
_writeCommand(0x20 | _function); // Set function, EXT=0 (Select Instr Set = 0)
break; // case ST7070 Controller
default:
//Unsupported feature for other controllers
break;
} // end switch _ctrl
break; // end Bottom
} // end switch orient
} // end setOrient()
/** Set Big Font
* setBigFont method is supported by some compatible devices (eg SSD1803, US2066)
*
* @param lines The selected Big Font lines (None, TopLine, CenterLine, BottomLine, TopBottomLine)
* Double height characters can be shown on lines 1+2, 2+3, 3+4 or 1+2 and 3+4
* Valid double height lines depend on the LCDs number of rows.
*/
void TextLCD_Base::setBigFont(LCDBigFont lines) {
switch (lines) {
case None:
switch (_ctrl) {
case SSD1803_3V3 :
case US2066_3V3 :
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 X N BE RE(1) REV
// Select Extended Instruction Set
_writeCommand(0x1C); // Double Height, 0 0 0 1 UD2=1, UD1=1, X, DH'=0 (Ext Instr Set)
// Default
_function = _function & ~0x04; // Set function, 0 0 1 DL N DH=0 RE(0) IS=0 Select Instruction Set 0
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS=0 Select Instruction Set 0
// Select Std Instr set, Select IS=0
break; // end US2066
default:
break; // end default
} // end switch _ctrl
break; // end None
case TopLine:
if (_nr_rows < 2) return; //Sanity check
switch (_ctrl) {
case SSD1803_3V3 :
case US2066_3V3 :
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 X N BE RE(1) REV
// Select Extended Instruction Set
_writeCommand(0x1C); // Double Height, 0 0 0 1 UD2=1, UD1=1, X, DH'=0 (Ext Instr Set)
// Default
_function = _function | 0x04; // Set function, 0 0 1 DL N DH=1 RE(0) IS=0 Select Instruction Set 0
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS=0 Select Instruction Set 0
// Select Std Instr set, Select IS=0
break; // end US2066, SSD1803
default:
break; // end default
} // end switch _ctrl
break; // end TopLine
case CenterLine:
if (_nr_rows != 4) return; //Sanity check
switch (_ctrl) {
case SSD1803_3V3 :
case US2066_3V3 :
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 X N BE RE(1) REV
// Select Extended Instruction Set
_writeCommand(0x14); // Double Height, 0 0 0 1 UD2=0, UD1=1, X, DH'=0 (Ext Instr Set)
// Default
_function = _function | 0x04; // Set function, 0 0 1 DL N DH=1 RE(0) IS=0 Select Instruction Set 0
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS=0 Select Instruction Set 0
// Select Std Instr set, Select IS=0
break; // end US2066, SSD1803
default:
break; // end default
} // end switch _ctrl
break; // end CenterLine
case BottomLine:
if (_nr_rows < 3) return; //Sanity check
switch (_ctrl) {
case SSD1803_3V3 :
case US2066_3V3 :
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 X N BE RE(1) REV
// Select Extended Instruction Set
if (_nr_rows == 3) {
_writeCommand(0x14); // Double Height, 0 0 0 1 UD2=0, UD1=1, X, DH'=0 (Ext Instr Set)
}
else {
_writeCommand(0x10); // Double Height, 0 0 0 1 UD2=0, UD1=0, X, DH'=0 (Ext Instr Set)
}
_function = _function | 0x04; // Set function, 0 0 1 DL N DH=1 RE(0) IS=0 Select Instruction Set 0
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS=0 Select Instruction Set 0
// Select Std Instr set, Select IS=0
break; // end US2066, SSD1803
default:
break; // end default
} // end switch _ctrl
break; // end BottomLine
case TopBottomLine:
if (_nr_rows != 4) return; //Sanity check
switch (_ctrl) {
case SSD1803_3V3 :
case US2066_3V3 :
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 X N BE RE(1) REV
// Select Extended Instruction Set
_writeCommand(0x18); // Double Height, 0 0 0 1 UD2=1, UD1=0, X, DH'=0 (Ext Instr Set)
// Default
_function = _function | 0x04; // Set function, 0 0 1 DL N DH=1 RE(0) IS=0 Select Instruction Set 0
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS=0 Select Instruction Set 0
// Select Std Instr set, Select IS=0
break; // end US2066, SSD1803
default:
break; // end default
} // end switch _ctrl
break; // end TopBottomLine
} // end switch lines
} // end setBigFont()
/** Set Icons
*
* @param unsigned char idx The Index of the icon pattern (0..15) for KS0073 and similar controllers
* and Index (0..31) for PCF2103 and similar controllers
* @param unsigned char data The bitpattern for the icons (6 lsb for KS0073 bitpattern (5 lsb for KS0078) and 2 msb for blinkmode)
* The bitpattern for the PCF2103 icons is 5 lsb (UDC 0..2) and 5 lsb for blinkmode (UDC 4..6)
*/
void TextLCD_Base::setIcon(unsigned char idx, unsigned char data) {
// Blinking icons are enabled when a specific controlbit (BE) is set.
// The blinking pixels in the icons can be controlled by setting additional bits in the icon bitpattern.
// Icons are defined by a byte bitpattern. The P0..P5 form the Icon pattern for KS0073, and P0..P4 for KS0078
// P7 P6 P5 P4 P3 P2 P1 P0
// 0 B1 B0 0 0 1 1 1 0
// 1 B1 B0 1 1 0 0 0 1
// .............
// 15 B1 B0 1 1 0 0 0 1
//
// Bit 6 and Bit 7 in the pattern will control the blinking mode when Blink is enabled through BE.
// B1 B0 Mode
// 0 0 No Blinking for this icon row
// 0 1 Enabled pixels in P5 will blink
// 1 x Enabled pixels in P0..P5 will blink
//
// Note: the PCF2103 and PCF2113 use UDCs to set Icons
// 3 x 8 rows x 5 bits = 120 bits Icons for Normal pattern (UDC 0..2) and
// 3 x 8 rows x 5 bits = 120 bits Icons for Blink pattern (UDC 4..6)
// Note: the PCF2119 uses UDCs to set Icons
// 4 x 8 rows x 5 bits = 160 bits Icons for Normal pattern (UDC 0..3) and
// 4 x 8 rows x 5 bits = 160 bits Icons for Blink pattern (UDC 4..7)
switch (_ctrl) {
case KS0073:
case KS0078:
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 DL N RE(1) BE LP
// Select Extended Instruction Set
_writeCommand(0x40 | (idx & 0x0F)); // Set Icon Address, mask Address to valid range (Ext Instr Set)
_writeData(data); // Set Icon pattern (Ext Instr Set)
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N RE(0) DH REV Select Instruction Set 0
// Select Std Instr set, Select IS=0
break; // end KS0073, KS0078
case ST7032_3V3:
case ST7032_5V:
_writeCommand(0x20 | _function | 0x01); // Set function, 0 0 1 DL N F 0 IS=1 Select Instr Set = 1
_writeCommand(0x40 | (idx & 0x0F)); // Set Icon Address, mask Address to valid range (Instr Set 1)
_writeData(data & 0x1F); // Set Icon pattern, no blink support (Instr Set 1)
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N RE(0) DH REV Select Instruction Set 0
// Select Std Instr set, Select IS=0
break; // end ST7032
case ST7036_3V3:
case ST7036_5V:
_writeCommand(0x20 | _function | 0x01); // Set function, 0 0 1 DL N DH IS2,IS1 = 01 (Select Instr Set = 1)
_writeCommand(0x40 | (idx & 0x0F)); // Set Icon Address, mask Address to valid range (Instr Set 1)
_writeData(data & 0x1F); // Set Icon pattern, no blink support (Instr Set 1)
_writeCommand(0x20 | _function); // Set function, IS2,IS1 = 00 (Select Instr Set = 0)
// Select Std Instr set, Select IS=0
break; // end ST7036
case SSD1803_3V3:
// case SSD1803_5V:
_writeCommand(0x20 | _function | 0x01); // Set function, 0 0 1 DL N DH RE(0) IS
// Select Instruction Set 1
_writeCommand(0x40 | (idx & 0x0F)); // Set Icon Address, mask Address to valid range (Instr Set = 1)
_writeData(data); // Set Icon pattern (Instr Set = 1)
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS
// Select IS=0
break; // end SSD1803
case PCF2103_3V3:
case PCF2113_3V3:
case PCF2119_3V3:
// Store UDC/Icon pattern for PCF2103 and PCF2113:
// 3 x 8 rows x 5 bits = 120 bits for Normal pattern (UDC 0..2) and
// 3 x 8 rows x 5 bits = 120 bits for Blink pattern (UDC 4..6)
// Store UDC/Icon pattern for PCF2119:
// 4 x 8 rows x 5 bits = 160 bits for Normal pattern (UDC 0..3) and
// 4 x 8 rows x 5 bits = 160 bits for Blink pattern (UDC 4..7)
_writeCommand(0x40 | (idx & 0x3F)); //Set CG-RAM address, 8 sequential locations needed per UDC
_writeData(data); // Set Icon pattern (Instr Set = 1)
break; // case PCF2103_3V3 Controller
default:
break; // end default
} // end switch _ctrl
//Select DD RAM again for current LCD controller and restore the addresspointer
int addr = getAddress(_column, _row);
_writeCommand(0x80 | addr);
} // end setIcon()
/** Clear Icons
*
* @param none
* @return none
*/
//@TODO Add support for 40x4 dual controller
void TextLCD_Base::clrIcon() {
// Icons are defined by a byte bitpattern. The P0..P5 form the Icon pattern for KS0073, and P0..P4 for KS0078
// P7 P6 P5 P4 P3 P2 P1 P0
// 0 B1 B0 0 0 0 0 0 0
// 1 B1 B0 0 0 0 0 0 0
// .............
// 15 B1 B0 0 0 0 0 0 0
//
// Bit 6 and Bit 7 in the pattern will control the blinking mode when Blink is enabled through BE.
// B1 B0 Mode
// 0 0 No Blinking for this icon row
// 0 1 Enabled pixels in P5 will blink
// 1 x Enabled pixels in P0..P5 will blink
//
// Note: the PCF2103 and PCF2113 use UDCs to set Icons
// 3 x 8 rows x 5 bits = 120 bits Icons for Normal pattern (UDC 0..2) and
// 3 x 8 rows x 5 bits = 120 bits Icons for Blink pattern (UDC 4..6)
// Note: the PCF2119 uses UDCs to set Icons
// 4 x 8 rows x 5 bits = 160 bits Icons for Normal pattern (UDC 0..3) and
// 4 x 8 rows x 5 bits = 160 bits Icons for Blink pattern (UDC 4..7)
int idx;
switch (_ctrl) {
case KS0073:
case KS0078:
_writeCommand(0x20 | _function_1); // Set function, 0 0 1 DL N RE(1) BE LP
// Select Extended Instruction Set
for (idx=0; idx<16; idx++) {
_writeCommand(0x40 | idx); // Set Icon Address, mask Address to valid range (Ext Instr Set)
_writeData(0x00); // Clear Icon pattern (Ext Instr Set)
}
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N RE(0) DH REV Select Std Instruction Set
// Select Std Instr set
break; // end KS0073, KS0078
case ST7032_3V3:
case ST7032_5V:
_writeCommand(0x20 | _function | 0x01); // Set function, 0 0 1 DL N F 0 IS=1 Select Instr Set = 1
for (idx=0; idx<16; idx++) {
_writeCommand(0x40 | idx); // Set Icon Address, mask Address to valid range (Instr Set 1)
_writeData(0x00); // Clear Icon pattern (Instr Set 1)
}
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N RE(0) DH REV Select Instruction Set 0
// Select Std Instr set, Select IS=0
break; // end ST7032
case ST7036_3V3:
case ST7036_5V:
_writeCommand(0x20 | _function | 0x01); // Set function, 0 0 1 DL N DH IS2,IS1 = 01 (Select Instr Set = 1)
for (idx=0; idx<16; idx++) {
_writeCommand(0x40 | idx); // Set Icon Address, mask Address to valid range (Instr Set 1)
_writeData(0x00); // Clear Icon pattern (Instr Set 1)
}
_writeCommand(0x20 | _function); // Set function, IS2,IS1 = 00 (Select Instr Set = 0)
// Select Std Instr set, Select IS=0
break; // end ST7036
case SSD1803_3V3:
// case SSD1803_5V:
_writeCommand(0x20 | _function | 0x01); // Set function, 0 0 1 DL N DH RE(0) IS
// Select Instruction Set 1
for (idx=0; idx<16; idx++) {
_writeCommand(0x40 | idx); // Set Icon Address, mask Address to valid range (Ext Instr Set)
_writeData(0x00); // Clear Icon pattern (Ext Instr Set)
}
_writeCommand(0x20 | _function); // Set function, 0 0 1 DL N DH RE(0) IS
// Select IS=0
break; // end SSD1803
case PCF2103_3V3:
case PCF2113_3V3:
// PCF2103 and PCF2113 use part of the UDC RAM to control Icons
// Select CG RAM
_writeCommand(0x40 | (0 * 8)); //Set CG-RAM address, 8 sequential locations needed per UDC
// Store UDC/Icon pattern:
// 3 x 8 rows x 5 bits = 120 bits for Normal pattern (UDC 0..2) and
for (int i=0; i<(3 * 8); i++) {
// _writeData(0x1F); // All On
_writeData(0x00); // All Off
}
_writeCommand(0x40 | (4 * 8)); //Set CG-RAM address, 8 sequential locations needed per UDC
// 3 x 8 rows x 5 bits = 120 bits for Blink pattern (UDC 4..6)
for (int i=0; i<(3 * 8); i++) {
// _writeData(0x1F); // All On
_writeData(0x00); // All Off
}
break; // case PCF2103_3V3 Controller
case PCF2119_3V3:
// PCF2119 uses part of the UDC RAM to control Icons
// Select CG RAM
_writeCommand(0x40 | (0 * 8)); //Set CG-RAM address, 8 sequential locations needed per UDC
// Store UDC/Icon pattern:
// 4 x 8 rows x 5 bits = 160 bits for Normal pattern (UDC 0..3) and
for (int i=0; i<(4 * 8); i++) {
// _writeData(0x1F); // All On
_writeData(0x00); // All Off
}
_writeCommand(0x40 | (4 * 8)); //Set CG-RAM address, 8 sequential locations needed per UDC
// 4 x 8 rows x 5 bits = 160 bits for Blink pattern (UDC 4..7)
for (int i=0; i<(4 * 8); i++) {
// _writeData(0x1F); // All On
_writeData(0x00); // All Off
}
break; // case PCF2119_3V3 Controller
default:
break; // end default
} // end switch _ctrl
//Select DD RAM again for current LCD controller and restore the addresspointer
int addr = getAddress(_column, _row);
_writeCommand(0x80 | addr);
} //end clrIcon()
/** Set Invert
* setInvert method is supported by some compatible devices (eg KS0073) to swap between black and white
*
* @param bool invertOn Invert on/off
* @return none
*/
//@TODO Add support for 40x4 dual controller
void TextLCD_Base::setInvert(bool invertOn) {
if (invertOn) {
// Controllers that support Invert
switch (_ctrl) {
case KS0073:
case KS0078:
_function = _function | 0x01; // Enable Invert
_writeCommand(0x20 | _function); // Activate Invert (Std Instr Set)
break;
case SSD1803_3V3 :
// case SSD1803_5V :
case US2066_3V3:
// case USS2066_5V:
_function_1 = _function_1 | 0x01; // Enable Invert
// Set function, 0 0 1 DL N BE RE(1) REV (SSD1803)
// Set function, 0 0 1 X N BE RE(1) REV (US2066)
_writeCommand(0x20 | _function_1); // Activate Invert (Ext Instr Set)
_writeCommand(0x20 | _function); // Return to Std Instr Set
break;
default:
//Unsupported feature for other controllers
break;
} // end switch
}
else {
// Controllers that support Invert
switch (_ctrl) {
case KS0073:
case KS0078:
_function = _function & ~0x01; // Disable Invert
_writeCommand(0x20 | _function); // Disable Invert (Std Instr Set)
break;
case SSD1803_3V3 :
// case SSD1803_5V :
case US2066_3V3:
// case USS2066_5V:
_function_1 = _function_1 & ~0x01; // Disable Invert
// Set function, 0 0 1 DL N BE RE(1) REV (SSD1803)
// Set function, 0 0 1 X N BE RE(1) REV (US2066)
_writeCommand(0x20 | _function_1); // Activate Invert (Ext Instr Set)
_writeCommand(0x20 | _function); // Return to Std Instr Set
break;
default:
//Unsupported feature for other controllers
break;
} // end switch
}
} // end setInvert()
//--------- End TextLCD_Base -----------
//--------- Start TextLCD Bus -----------
/* Create a TextLCD interface for using regular mbed pins
*
* @param rs Instruction/data control line
* @param e Enable line (clock)
* @param d4-d7 Data lines for using as a 4-bit interface
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param bl Backlight control line (optional, default = NC)
* @param e2 Enable2 line (clock for second controller, LCD40x4 only)
* @param ctrl LCD controller (default = HD44780)
*/
TextLCD::TextLCD(PinName rs, PinName e,
PinName d4, PinName d5, PinName d6, PinName d7,
LCDType type, PinName bl, PinName e2, LCDCtrl ctrl) :
TextLCD_Base(type, ctrl),
_rs(rs), _e(e), _d(d4, d5, d6, d7) {
// The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
if (bl != NC) {
_bl = new DigitalOut(bl); //Construct new pin
_bl->write(0); //Deactivate
}
else {
// No Hardware Backlight pin
_bl = NULL; //Construct dummy pin
}
// The hardware Enable2 pin is only needed for LCD40x4. Test and make sure whether it exists or not to prevent illegal access.
if (e2 != NC) {
_e2 = new DigitalOut(e2); //Construct new pin
_e2->write(0); //Deactivate
}
else {
// No Hardware Enable pin
_e2 = NULL; //Construct dummy pin
}
_init(_LCD_DL_4); // Set Datalength to 4 bit for mbed bus interfaces
}
/** Destruct a TextLCD interface for using regular mbed pins
*
* @param none
* @return none
*/
TextLCD::~TextLCD() {
if (_bl != NULL) {delete _bl;} // BL pin
if (_e2 != NULL) {delete _e2;} // E2 pin
}
/** Set E pin (or E2 pin)
* Used for mbed pins, I2C bus expander or SPI shiftregister
* Default PinName value for E2 is NC, must be used as pointer to avoid issues with mbed lib and DigitalOut pins
* @param value true or false
* @return none
*/
void TextLCD::_setEnable(bool value) {
if(_ctrl_idx==_LCDCtrl_0) {
if (value) {
_e = 1; // Set E bit
}
else {
_e = 0; // Reset E bit
}
}
else {
if (value) {
if (_e2 != NULL) {_e2->write(1);} //Set E2 bit
}
else {
if (_e2 != NULL) {_e2->write(0);} //Reset E2 bit
}
}
}
// Set RS pin
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD::_setRS(bool value) {
if (value) {
_rs = 1; // Set RS bit
}
else {
_rs = 0; // Reset RS bit
}
}
/** Set BL pin
* Used for mbed pins, I2C bus expander or SPI shiftregister
* Default PinName value is NC, must be used as pointer to avoid issues with mbed lib and DigitalOut pins
* @param value true or false
* @return none
*/
void TextLCD::_setBL(bool value) {
if (value) {
if (_bl != NULL) {_bl->write(1);} //Set BL bit
}
else {
if (_bl != NULL) {_bl->write(0);} //Reset BL bit
}
}
// Place the 4bit data on the databus
// Used for mbed pins, I2C bus expander or SPI shifregister
void TextLCD::_setData(int value) {
_d = value & 0x0F; // Write Databits
}
//----------- End TextLCD ---------------
//--------- Start TextLCD_I2C -----------
#if(LCD_I2C == 1) /* I2C Expander PCF8574/MCP23008 */
/** Create a TextLCD interface using an I2C PC8574 (or PCF8574A) or MCP23008 portexpander
*
* @param i2c I2C Bus
* @param deviceAddress I2C slave address (PCF8574, PCF8574A or MCP23008, default = 0x40)
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param ctrl LCD controller (default = HD44780)
*/
TextLCD_I2C::TextLCD_I2C(I2C *i2c, char deviceAddress, LCDType type, LCDCtrl ctrl) :
TextLCD_Base(type, ctrl),
_i2c(i2c){
_slaveAddress = deviceAddress & 0xFE;
// Setup the I2C bus
// The max bitrate for PCF8574 is 100kbit, the max bitrate for MCP23008 is 400kbit,
_i2c->frequency(100000);
#if (MCP23008==1)
// MCP23008 portexpander Init
_writeRegister(IODIR, 0x00); // All pins are outputs
_writeRegister(IPOL, 0x00); // No reverse polarity on inputs
_writeRegister(GPINTEN, 0x00); // No interrupt on change of input pins
_writeRegister(DEFVAL, 0x00); // Default value to compare against for interrupts
_writeRegister(INTCON, 0x00); // No interrupt on changes, compare against previous pin value
_writeRegister(IOCON, 0x20); // b1=0 - Interrupt polarity active low
// b2=0 - Interrupt pin active driver output
// b4=0 - Slew rate enable on SDA
// b5=0 - Auto-increment on registeraddress
// b5=1 - No auto-increment on registeraddress => needed for performance improved I2C expander mode
_writeRegister(GPPU, 0x00); // No Pullup
// INTF // Interrupt flags read (Read-Only)
// INTCAP // Captured inputpins at time of interrupt (Read-Only)
// _writeRegister(GPIO, 0x00); // Output/Input pins
// _writeRegister(OLAT, 0x00); // Output Latch
// Init the portexpander bus
_lcd_bus = LCD_BUS_I2C_DEF;
// write the new data to the portexpander
_writeRegister(GPIO, _lcd_bus);
#else
// PCF8574 of PCF8574A portexpander
// Init the portexpander bus
_lcd_bus = LCD_BUS_I2C_DEF;
// write the new data to the portexpander
_i2c->write(_slaveAddress, &_lcd_bus, 1);
#endif
_init(_LCD_DL_4); // Set Datalength to 4 bit for all serial expander interfaces
}
// Set E bit (or E2 bit) in the databus shadowvalue
// Used for mbed I2C bus expander
void TextLCD_I2C::_setEnableBit(bool value) {
if(_ctrl_idx==_LCDCtrl_0) {
if (value) {
_lcd_bus |= LCD_BUS_I2C_E; // Set E bit
}
else {
_lcd_bus &= ~LCD_BUS_I2C_E; // Reset E bit
}
}
else {
if (value) {
_lcd_bus |= LCD_BUS_I2C_E2; // Set E2 bit
}
else {
_lcd_bus &= ~LCD_BUS_I2C_E2; // Reset E2bit
}
}
}
// Set E pin (or E2 pin)
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_I2C::_setEnable(bool value) {
// Place the E or E2 bit data on the databus shadowvalue
_setEnableBit(value);
#if (MCP23008==1)
// MCP23008 portexpander
// write the new data to the portexpander
_writeRegister(GPIO, _lcd_bus);
#else
// PCF8574 of PCF8574A portexpander
// write the new data to the I2C portexpander
_i2c->write(_slaveAddress, &_lcd_bus, 1);
#endif
}
// Set RS pin
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_I2C::_setRS(bool value) {
if (value) {
_lcd_bus |= LCD_BUS_I2C_RS; // Set RS bit
}
else {
_lcd_bus &= ~LCD_BUS_I2C_RS; // Reset RS bit
}
#if (MCP23008==1)
// MCP23008 portexpander
// write the new data to the portexpander
_writeRegister(GPIO, _lcd_bus);
#else
// PCF8574 of PCF8574A portexpander
// write the new data to the I2C portexpander
_i2c->write(_slaveAddress, &_lcd_bus, 1);
#endif
}
// Set BL pin
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_I2C::_setBL(bool value) {
if (value) {
_lcd_bus |= LCD_BUS_I2C_BL; // Set BL bit
}
else {
_lcd_bus &= ~LCD_BUS_I2C_BL; // Reset BL bit
}
#if (MCP23008==1)
// MCP23008 portexpander
// write the new data to the portexpander
_writeRegister(GPIO, _lcd_bus);
#else
// PCF8574 of PCF8574A portexpander
// write the new data to the I2C portexpander
_i2c->write(_slaveAddress, &_lcd_bus, 1);
#endif
}
#if(0)
// New optimized v018
// Test faster _writeByte 0.11s vs 0.27s for a 20x4 fillscreen (PCF8574), same as v018
// Place the 4bit data in the databus shadowvalue
// Used for mbed I2C bus expander
const char _LCD_DATA_BITS[16] = {
0x00,
( LCD_BUS_I2C_D4),
( LCD_BUS_I2C_D5 ),
( LCD_BUS_I2C_D5 | LCD_BUS_I2C_D4),
( LCD_BUS_I2C_D6 ),
( LCD_BUS_I2C_D6 | LCD_BUS_I2C_D4),
( LCD_BUS_I2C_D6 | LCD_BUS_I2C_D5 ),
( LCD_BUS_I2C_D6 | LCD_BUS_I2C_D5 | LCD_BUS_I2C_D4),
(LCD_BUS_I2C_D7 ),
(LCD_BUS_I2C_D7 | LCD_BUS_I2C_D4),
(LCD_BUS_I2C_D7 | LCD_BUS_I2C_D5 ),
(LCD_BUS_I2C_D7 | LCD_BUS_I2C_D5 | LCD_BUS_I2C_D4),
(LCD_BUS_I2C_D7 | LCD_BUS_I2C_D6 ),
(LCD_BUS_I2C_D7 | LCD_BUS_I2C_D6 | LCD_BUS_I2C_D4),
(LCD_BUS_I2C_D7 | LCD_BUS_I2C_D6 | LCD_BUS_I2C_D5 ),
(LCD_BUS_I2C_D7 | LCD_BUS_I2C_D6 | LCD_BUS_I2C_D5 | LCD_BUS_I2C_D4)
};
void TextLCD_I2C::_setDataBits(int value) {
//Clear all databits
_lcd_bus &= ~LCD_BUS_I2C_MSK;
// Set bit by bit to support any mapping of expander portpins to LCD pins
_lcd_bus |= _LCD_DATA_BITS[value & 0x0F];
}
#else
//orig v017
// Test faster _writeByte 0.11s vs 0.27s for a 20x4 fillscreen (PCF8574)
// Place the 4bit data in the databus shadowvalue
// Used for mbed I2C bus expander
void TextLCD_I2C::_setDataBits(int value) {
// Set bit by bit to support any mapping of expander portpins to LCD pins
if (value & 0x01){
_lcd_bus |= LCD_BUS_I2C_D4; // Set Databit
}
else {
_lcd_bus &= ~LCD_BUS_I2C_D4; // Reset Databit
}
if (value & 0x02){
_lcd_bus |= LCD_BUS_I2C_D5; // Set Databit
}
else {
_lcd_bus &= ~LCD_BUS_I2C_D5; // Reset Databit
}
if (value & 0x04) {
_lcd_bus |= LCD_BUS_I2C_D6; // Set Databit
}
else {
_lcd_bus &= ~LCD_BUS_I2C_D6; // Reset Databit
}
if (value & 0x08) {
_lcd_bus |= LCD_BUS_I2C_D7; // Set Databit
}
else {
_lcd_bus &= ~LCD_BUS_I2C_D7; // Reset Databit
}
}
#endif
// Place the 4bit data on the databus
// Used for mbed pins, I2C bus expander or SPI shifregister
void TextLCD_I2C::_setData(int value) {
// Place the 4bit data on the databus shadowvalue
_setDataBits(value);
// Place the 4bit data on the databus
#if (MCP23008==1)
// MCP23008 portexpander
// write the new data to the portexpander
_writeRegister(GPIO, _lcd_bus);
#else
// PCF8574 of PCF8574A portexpander
// write the new data to the I2C portexpander
_i2c->write(_slaveAddress, &_lcd_bus, 1);
#endif
}
// Write data to MCP23008 I2C portexpander
// Used for mbed I2C bus expander
void TextLCD_I2C::_writeRegister (int reg, int value) {
char data[] = {reg, value};
_i2c->write(_slaveAddress, data, 2);
}
//New optimized
//Test faster _writeByte 0.11s vs 0.27s for a 20x4 fillscreen (PCF8574)
//Test faster _writeByte 0.14s vs 0.34s for a 20x4 fillscreen (MCP23008)
// Write a byte using I2C
void TextLCD_I2C::_writeByte(int value) {
char data[6];
#if (MCP23008==1)
// MCP23008 portexpander
data[0] = GPIO; // set registeraddres
// Note: auto-increment is disabled so all data will go to GPIO register
_setEnableBit(true); // set E
_setDataBits(value >> 4); // set data high
data[1] = _lcd_bus;
_setEnableBit(false); // clear E
data[2] = _lcd_bus;
_setEnableBit(true); // set E
_setDataBits(value); // set data low
data[3] = _lcd_bus;
_setEnableBit(false); // clear E
data[4] = _lcd_bus;
// write the packed data to the I2C portexpander
_i2c->write(_slaveAddress, data, 5);
#else
// PCF8574 of PCF8574A portexpander
_setEnableBit(true); // set E
_setDataBits(value >> 4); // set data high
data[0] = _lcd_bus;
_setEnableBit(false); // clear E
data[1] = _lcd_bus;
_setEnableBit(true); // set E
_setDataBits(value); // set data low
data[2] = _lcd_bus;
_setEnableBit(false); // clear E
data[3] = _lcd_bus;
// write the packed data to the I2C portexpander
_i2c->write(_slaveAddress, data, 4);
#endif
}
#endif /* I2C Expander PCF8574/MCP23008 */
//---------- End TextLCD_I2C ------------
//--------- Start TextLCD_SPI -----------
#if(LCD_SPI == 1) /* SPI Expander SN74595 */
/** Create a TextLCD interface using an SPI 74595 portexpander
*
* @param spi SPI Bus
* @param cs chip select pin (active low)
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param ctrl LCD controller (default = HD44780)
*/
TextLCD_SPI::TextLCD_SPI(SPI *spi, PinName cs, LCDType type, LCDCtrl ctrl) :
TextLCD_Base(type, ctrl),
_spi(spi),
_cs(cs) {
// Init cs
_cs = 1;
// Setup the spi for 8 bit data, low steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
_spi->format(8,0);
_spi->frequency(500000);
//_spi.frequency(1000000);
wait_ms(100); // Wait 100ms to ensure LCD powered up
// Init the portexpander bus
_lcd_bus = LCD_BUS_SPI_DEF;
// write the new data to the portexpander
_cs = 0;
_spi->write(_lcd_bus);
_cs = 1;
_init(_LCD_DL_4); // Set Datalength to 4 bit for all serial expander interfaces
}
// Set E pin (or E2 pin)
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_SPI::_setEnable(bool value) {
if(_ctrl_idx==_LCDCtrl_0) {
if (value) {
_lcd_bus |= LCD_BUS_SPI_E; // Set E bit
}
else {
_lcd_bus &= ~LCD_BUS_SPI_E; // Reset E bit
}
}
else {
if (value) {
_lcd_bus |= LCD_BUS_SPI_E2; // Set E2 bit
}
else {
_lcd_bus &= ~LCD_BUS_SPI_E2; // Reset E2 bit
}
}
// write the new data to the SPI portexpander
_cs = 0;
_spi->write(_lcd_bus);
_cs = 1;
}
// Set RS pin
// Used for mbed pins, I2C bus expander or SPI shiftregister and SPI_N
void TextLCD_SPI::_setRS(bool value) {
if (value) {
_lcd_bus |= LCD_BUS_SPI_RS; // Set RS bit
}
else {
_lcd_bus &= ~LCD_BUS_SPI_RS; // Reset RS bit
}
// write the new data to the SPI portexpander
_cs = 0;
_spi->write(_lcd_bus);
_cs = 1;
}
// Set BL pin
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_SPI::_setBL(bool value) {
if (value) {
_lcd_bus |= LCD_BUS_SPI_BL; // Set BL bit
}
else {
_lcd_bus &= ~LCD_BUS_SPI_BL; // Reset BL bit
}
// write the new data to the SPI portexpander
_cs = 0;
_spi->write(_lcd_bus);
_cs = 1;
}
// Place the 4bit data on the databus
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_SPI::_setData(int value) {
// Set bit by bit to support any mapping of expander portpins to LCD pins
if (value & 0x01) {
_lcd_bus |= LCD_BUS_SPI_D4; // Set Databit
}
else {
_lcd_bus &= ~LCD_BUS_SPI_D4; // Reset Databit
}
if (value & 0x02) {
_lcd_bus |= LCD_BUS_SPI_D5; // Set Databit
}
else {
_lcd_bus &= ~LCD_BUS_SPI_D5; // Reset Databit
}
if (value & 0x04) {
_lcd_bus |= LCD_BUS_SPI_D6; // Set Databit
}
else {
_lcd_bus &= ~LCD_BUS_SPI_D6; // Reset Databit
}
if (value & 0x08) {
_lcd_bus |= LCD_BUS_SPI_D7; // Set Databit
}
else {
_lcd_bus &= ~LCD_BUS_SPI_D7; // Reset Databit
}
// write the new data to the SPI portexpander
_cs = 0;
_spi->write(_lcd_bus);
_cs = 1;
}
#endif /* SPI Expander SN74595 */
//---------- End TextLCD_SPI ------------
//--------- Start TextLCD_I2C_N ---------
#if(LCD_I2C_N == 1) /* Native I2C */
/** Create a TextLCD interface using a controller with native I2C interface
*
* @param i2c I2C Bus
* @param deviceAddress I2C slave address (default = 0x7C)
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param bl Backlight control line (optional, default = NC)
* @param ctrl LCD controller (default = ST7032_3V3)
*/
TextLCD_I2C_N::TextLCD_I2C_N(I2C *i2c, char deviceAddress, LCDType type, PinName bl, LCDCtrl ctrl) :
TextLCD_Base(type, ctrl),
_i2c(i2c){
_slaveAddress = deviceAddress & 0xFE;
// Setup the I2C bus
// The max bitrate for ST7032i is 400kbit, lets stick to default here
_i2c->frequency(100000);
// The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
if (bl != NC) {
_bl = new DigitalOut(bl); //Construct new pin
_bl->write(0); //Deactivate
}
else {
// No Hardware Backlight pin
_bl = NULL; //Construct dummy pin
}
//Sanity check
if (_ctrl & LCD_C_I2C) {
_init(_LCD_DL_8); // Set Datalength to 8 bit for all native serial interfaces
}
else {
error("Error: LCD Controller type does not support native I2C interface\n\r");
}
}
TextLCD_I2C_N::~TextLCD_I2C_N() {
if (_bl != NULL) {delete _bl;} // BL pin
}
// Not used in this mode
void TextLCD_I2C_N::_setEnable(bool value) {
}
// Set RS pin
// Used for mbed pins, I2C bus expander or SPI shiftregister and native I2C or SPI
void TextLCD_I2C_N::_setRS(bool value) {
// The controlbyte defines the meaning of the next byte. This next byte can either be data or command.
// Start Slaveaddress+RW b7 b6 b5 b4 b3 b2 b1 b0 b7...........b0 Stop
// Co RS RW 0 0 0 0 0 command or data
//
// C0=1 indicates that another controlbyte will follow after the next data or command byte
// RS=1 means that next byte is data, RS=0 means that next byte is command
// RW=0 means write to controller. RW=1 means that controller will be read from after the next command.
// Many native I2C controllers dont support this option and it is not used by this lib.
//
if (value) {
_controlbyte = 0x40; // Next byte is data, No more control bytes will follow
}
else {
_controlbyte = 0x00; // Next byte is command, No more control bytes will follow
}
}
// Set BL pin
void TextLCD_I2C_N::_setBL(bool value) {
if (_bl) {
_bl->write(value);
}
}
// Not used in this mode
void TextLCD_I2C_N::_setData(int value) {
}
// Write a byte using I2C
void TextLCD_I2C_N::_writeByte(int value) {
// The controlbyte defines the meaning of the next byte. This next byte can either be data or command.
// Start Slaveaddress+RW b7 b6 b5 b4 b3 b2 b1 b0 b7...........b0 Stop
// Co RS RW 0 0 0 0 0 command or data
//
// C0=1 indicates that another controlbyte will follow after the next data or command byte
// RS=1 means that next byte is data, RS=0 means that next byte is command
// RW=0 means write to controller. RW=1 means that controller will be read from after the next command.
// Many native I2C controllers dont support this option and it is not used by this lib.
//
char data[] = {_controlbyte, value};
#if(LCD_I2C_ACK==1)
//Controllers that support ACK
_i2c->write(_slaveAddress, data, 2);
#else
//Controllers that dont support ACK
//Note: This may be issue with some mbed platforms that dont fully/correctly support I2C byte operations.
_i2c->start();
_i2c->write(_slaveAddress);
_i2c->write(data[0]);
_i2c->write(data[1]);
_i2c->stop();
#endif
}
#endif /* Native I2C */
//-------- End TextLCD_I2C_N ------------
//--------- Start TextLCD_SPI_N ---------
#if(LCD_SPI_N == 1) /* Native SPI bus */
/** Create a TextLCD interface using a controller with a native SPI4 interface
*
* @param spi SPI Bus
* @param cs chip select pin (active low)
* @param rs Instruction/data control line
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param bl Backlight control line (optional, default = NC)
* @param ctrl LCD controller (default = ST7032_3V3)
*/
TextLCD_SPI_N::TextLCD_SPI_N(SPI *spi, PinName cs, PinName rs, LCDType type, PinName bl, LCDCtrl ctrl) :
TextLCD_Base(type, ctrl),
_spi(spi),
_cs(cs),
_rs(rs) {
// Init CS
_cs = 1;
// Setup the spi for 8 bit data, high steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
// _spi->format(8,3);
// _spi->frequency(500000);
// _spi->frequency(1000000);
// Setup the spi for 8 bit data, low steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
_spi->format(8,0);
// _spi->frequency(500000);
_spi->frequency(1000000);
// The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
if (bl != NC) {
_bl = new DigitalOut(bl); //Construct new pin
_bl->write(0); //Deactivate
}
else {
// No Hardware Backlight pin
_bl = NULL; //Construct dummy pin
}
//Sanity check
if (_ctrl & LCD_C_SPI4) {
_init(_LCD_DL_8); // Set Datalength to 8 bit for all native serial interfaces
// ST7070 must set datalength to 8 bits!
}
else {
error("Error: LCD Controller type does not support native SPI4 interface\n\r");
}
}
TextLCD_SPI_N::~TextLCD_SPI_N() {
if (_bl != NULL) {delete _bl;} // BL pin
}
// Not used in this mode
void TextLCD_SPI_N::_setEnable(bool value) {
}
// Set RS pin
// Used for mbed pins, I2C bus expander or SPI shiftregister, SPI_N
void TextLCD_SPI_N::_setRS(bool value) {
_rs = value;
}
// Set BL pin
void TextLCD_SPI_N::_setBL(bool value) {
if (_bl) {
_bl->write(value);
}
}
// Not used in this mode
void TextLCD_SPI_N::_setData(int value) {
}
// Write a byte using SPI
void TextLCD_SPI_N::_writeByte(int value) {
_cs = 0;
wait_us(1);
_spi->write(value);
wait_us(1);
_cs = 1;
}
#endif /* Native SPI bus */
//-------- End TextLCD_SPI_N ------------
//-------- Start TextLCD_SPI_N_3_8 --------
#if(LCD_SPI_N_3_8 == 1) /* Native SPI bus */
/** Create a TextLCD interface using a controller with a native SPI3 8 bits interface
* This mode is supported by ST7070. Note that implementation in TexTLCD is not very efficient due to
* structure of the TextLCD library: each databyte is written separately and requires a separate 'count command' set to 1 byte.
*
* @param spi SPI Bus
* @param cs chip select pin (active low)
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param bl Backlight control line (optional, default = NC)
* @param ctrl LCD controller (default = ST7070)
*/
TextLCD_SPI_N_3_8::TextLCD_SPI_N_3_8(SPI *spi, PinName cs, LCDType type, PinName bl, LCDCtrl ctrl) :
TextLCD_Base(type, ctrl),
_spi(spi),
_cs(cs) {
// Init CS
_cs = 1;
// Setup the spi for 8 bit data, high steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
// _spi->format(8,3);
// _spi->frequency(500000);
// _spi->frequency(1000000);
// Setup the spi for 8 bit data, low steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
_spi->format(8,0);
// _spi->frequency(500000);
_spi->frequency(1000000);
// The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
if (bl != NC) {
_bl = new DigitalOut(bl); //Construct new pin
_bl->write(0); //Deactivate
}
else {
// No Hardware Backlight pin
_bl = NULL; //Construct dummy pin
}
//Sanity check
if (_ctrl & LCD_C_SPI3_8) {
_init(_LCD_DL_8); // Set Datalength to 8 bit for all native serial interfaces
}
else {
error("Error: LCD Controller type does not support native SPI3 8 bits interface\n\r");
}
}
TextLCD_SPI_N_3_8::~TextLCD_SPI_N_3_8() {
if (_bl != NULL) {delete _bl;} // BL pin
}
// Not used in this mode
void TextLCD_SPI_N_3_8::_setEnable(bool value) {
}
// Used for mbed pins, I2C bus expander or SPI shiftregister, SPI_N
// RS=1 means that next byte is data, RS=0 means that next byte is command
void TextLCD_SPI_N_3_8::_setRS(bool value) {
if (value) {
_controlbyte = 0x01; // Next byte is data, No more control bytes will follow
}
else {
_controlbyte = 0x00; // Next byte is command, No more control bytes will follow
}
}
// Set BL pin
void TextLCD_SPI_N_3_8::_setBL(bool value) {
if (_bl) {
_bl->write(value);
}
}
// Not used in this mode
void TextLCD_SPI_N_3_8::_setData(int value) {
}
// Write a byte using SPI3 8 bits mode (ST7070)
void TextLCD_SPI_N_3_8::_writeByte(int value) {
if (_controlbyte == 0x00) { // Byte is command
_cs = 0;
wait_us(1);
_spi->write(value);
wait_us(1);
_cs = 1;
}
else { // Byte is data
// Select Extended Instr Set
_cs = 0;
wait_us(1);
_spi->write(0x20 | _function | 0x04); // Set function, 0 0 1 DL N EXT=1 x x (Select Instr Set = 1));
wait_us(1);
_cs = 1;
wait_us(40); // Wait until command has finished...
// Set Count to 1 databyte
_cs = 0;
wait_us(1);
_spi->write(0x80); // Set display data length, 1 L6 L5 L4 L3 L2 L1 L0 (Instr Set = 1)
wait_us(1);
_cs = 1;
wait_us(40);
// Write 1 databyte
_cs = 0;
wait_us(1);
_spi->write(value); // Write data (Instr Set = 1)
wait_us(1);
_cs = 1;
wait_us(40);
// Select Standard Instr Set
_cs = 0;
wait_us(1);
_spi->write(0x20 | _function); // Set function, 0 0 1 DL N EXT=0 x x (Select Instr Set = 0));
wait_us(1);
_cs = 1;
}
}
#endif /* Native SPI bus */
//------- End TextLCD_SPI_N_3_8 -----------
//-------- Start TextLCD_SPI_N_3_9 --------
#if(LCD_SPI_N_3_9 == 1) /* Native SPI bus */
//Code checked out on logic analyser. Not yet tested on hardware..
/** Create a TextLCD interface using a controller with a native SPI3 9 bits interface
*
* @param spi SPI Bus
* @param cs chip select pin (active low)
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param bl Backlight control line (optional, default = NC)
* @param ctrl LCD controller (default = AIP31068)
*/
TextLCD_SPI_N_3_9::TextLCD_SPI_N_3_9(SPI *spi, PinName cs, LCDType type, PinName bl, LCDCtrl ctrl) :
TextLCD_Base(type, ctrl),
_spi(spi),
_cs(cs) {
// Init CS
_cs = 1;
// Setup the spi for 9 bit data, high steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
_spi->format(9,3);
_spi->frequency(1000000);
// The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
if (bl != NC) {
_bl = new DigitalOut(bl); //Construct new pin
_bl->write(0); //Deactivate
}
else {
// No Hardware Backlight pin
_bl = NULL; //Construct dummy pin
}
//Sanity check
if (_ctrl & LCD_C_SPI3_9) {
_init(_LCD_DL_8); // Set Datalength to 8 bit for all native serial interfaces
}
else {
error("Error: LCD Controller type does not support native SPI3 9 bits interface\n\r");
}
}
TextLCD_SPI_N_3_9::~TextLCD_SPI_N_3_9() {
if (_bl != NULL) {delete _bl;} // BL pin
}
// Not used in this mode
void TextLCD_SPI_N_3_9::_setEnable(bool value) {
}
// Set RS pin
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_SPI_N_3_9::_setRS(bool value) {
// The controlbits define the meaning of the next byte. This next byte can either be data or command.
// b8 b7...........b0
// RS command or data
//
// RS=1 means that next byte is data, RS=0 means that next byte is command
//
if (value) {
_controlbyte = 0x01; // Next byte is data
}
else {
_controlbyte = 0x00; // Next byte is command
}
}
// Set BL pin
void TextLCD_SPI_N_3_9::_setBL(bool value) {
if (_bl) {
_bl->write(value);
}
}
// Not used in this mode
void TextLCD_SPI_N_3_9::_setData(int value) {
}
// Write a byte using SPI3 9 bits mode
void TextLCD_SPI_N_3_9::_writeByte(int value) {
_cs = 0;
wait_us(1);
_spi->write( (_controlbyte << 8) | (value & 0xFF));
wait_us(1);
_cs = 1;
}
#endif /* Native SPI bus */
//------- End TextLCD_SPI_N_3_9 -----------
//------- Start TextLCD_SPI_N_3_10 --------
#if(LCD_SPI_N_3_10 == 1) /* Native SPI bus */
/** Create a TextLCD interface using a controller with a native SPI3 10 bits interface
*
* @param spi SPI Bus
* @param cs chip select pin (active low)
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param bl Backlight control line (optional, default = NC)
* @param ctrl LCD controller (default = AIP31068)
*/
TextLCD_SPI_N_3_10::TextLCD_SPI_N_3_10(SPI *spi, PinName cs, LCDType type, PinName bl, LCDCtrl ctrl) :
TextLCD_Base(type, ctrl),
_spi(spi),
_cs(cs) {
// Init CS
_cs = 1;
// Setup the spi for 10 bit data, low steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
_spi->format(10,0);
_spi->frequency(1000000);
// The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
if (bl != NC) {
_bl = new DigitalOut(bl); //Construct new pin
_bl->write(0); //Deactivate
}
else {
// No Hardware Backlight pin
_bl = NULL; //Construct dummy pin
}
//Sanity check
if (_ctrl & LCD_C_SPI3_10) {
_init(_LCD_DL_8); // Set Datalength to 8 bit for all native serial interfaces
}
else {
error("Error: LCD Controller type does not support native SPI3 10 bits interface\n\r");
}
}
TextLCD_SPI_N_3_10::~TextLCD_SPI_N_3_10() {
if (_bl != NULL) {delete _bl;} // BL pin
}
// Not used in this mode
void TextLCD_SPI_N_3_10::_setEnable(bool value) {
}
// Set RS pin
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_SPI_N_3_10::_setRS(bool value) {
// The controlbits define the meaning of the next byte. This next byte can either be data or command.
// b9 b8 b7...........b0
// RS RW command or data
//
// RS=1 means that next byte is data, RS=0 means that next byte is command
// RW=0 means that next byte is writen, RW=1 means that next byte is read (not used in this lib)
//
if (value) {
_controlbyte = 0x02; // Next byte is data
}
else {
_controlbyte = 0x00; // Next byte is command
}
}
// Set BL pin
void TextLCD_SPI_N_3_10::_setBL(bool value) {
if (_bl) {
_bl->write(value);
}
}
// Not used in this mode
void TextLCD_SPI_N_3_10::_setData(int value) {
}
// Write a byte using SPI3 10 bits mode
void TextLCD_SPI_N_3_10::_writeByte(int value) {
_cs = 0;
wait_us(1);
_spi->write( (_controlbyte << 8) | (value & 0xFF));
wait_us(1);
_cs = 1;
}
#endif /* Native SPI bus */
//------- End TextLCD_SPI_N_3_10 ----------
//------- Start TextLCD_SPI_N_3_16 --------
#if(LCD_SPI_N_3_16 == 1) /* Native SPI bus */
/** Create a TextLCD interface using a controller with a native SPI3 16 bits interface
*
* @param spi SPI Bus
* @param cs chip select pin (active low)
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param bl Backlight control line (optional, default = NC)
* @param ctrl LCD controller (default = PT6314)
*/
TextLCD_SPI_N_3_16::TextLCD_SPI_N_3_16(SPI *spi, PinName cs, LCDType type, PinName bl, LCDCtrl ctrl) :
TextLCD_Base(type, ctrl),
_spi(spi),
_cs(cs) {
// Init CS
_cs = 1;
// Setup the spi for 8 bit data, low steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
_spi->format(8,0);
_spi->frequency(1000000);
// The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
if (bl != NC) {
_bl = new DigitalOut(bl); //Construct new pin
_bl->write(0); //Deactivate
}
else {
// No Hardware Backlight pin
_bl = NULL; //Construct dummy pin
}
//Sanity check
if (_ctrl & LCD_C_SPI3_16) {
_init(_LCD_DL_8); // Set Datalength to 8 bit for all native serial interfaces
}
else {
error("Error: LCD Controller type does not support native SPI3 16 bits interface\n\r");
}
}
TextLCD_SPI_N_3_16::~TextLCD_SPI_N_3_16() {
if (_bl != NULL) {delete _bl;} // BL pin
}
// Not used in this mode
void TextLCD_SPI_N_3_16::_setEnable(bool value) {
}
// Set RS pin
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_SPI_N_3_16::_setRS(bool value) {
// The 16bit mode is split in 2 bytes. The first byte is for synchronisation and controlbits. The controlbits define the meaning of the next byte.
// The 8 actual bits represent either a data or a command byte.
// b15 b14 b13 b12 b11 b10 b9 b8 - b7 b6 b5 b4 b3 b2 b1 b0
// 1 1 1 1 1 RW RS 0 d7 d6 d5 d4 d3 d2 d1 d0
//
// RS=1 means that next byte is data, RS=0 means that next byte is command
// RW=0 means that next byte is writen, RW=1 means that next byte is read (not used in this lib)
//
if (value) {
_controlbyte = 0xFA; // Next byte is data
}
else {
_controlbyte = 0xF8; // Next byte is command
}
}
// Set BL pin
void TextLCD_SPI_N_3_16::_setBL(bool value) {
if (_bl) {
_bl->write(value);
}
}
// Not used in this mode
void TextLCD_SPI_N_3_16::_setData(int value) {
}
// Write a byte using SPI3 16 bits mode
void TextLCD_SPI_N_3_16::_writeByte(int value) {
_cs = 0;
wait_us(1);
_spi->write(_controlbyte);
_spi->write(value);
wait_us(1);
_cs = 1;
}
#endif /* Native SPI bus */
//------- End TextLCD_SPI_N_3_16 ----------
//------- Start TextLCD_SPI_N_3_24 --------
#if(LCD_SPI_N_3_24 == 1) /* Native SPI bus */
/** Create a TextLCD interface using a controller with a native SPI3 24 bits interface
*
* @param spi SPI Bus
* @param cs chip select pin (active low)
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param bl Backlight control line (optional, default = NC)
* @param ctrl LCD controller (default = SSD1803)
*/
TextLCD_SPI_N_3_24::TextLCD_SPI_N_3_24(SPI *spi, PinName cs, LCDType type, PinName bl, LCDCtrl ctrl) :
TextLCD_Base(type, ctrl),
_spi(spi),
_cs(cs) {
// Init CS
_cs = 1;
// Setup the spi for 8 bit data, high steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
_spi->format(8,3);
_spi->frequency(1000000);
// The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
if (bl != NC) {
_bl = new DigitalOut(bl); //Construct new pin
_bl->write(0); //Deactivate
}
else {
// No Hardware Backlight pin
_bl = NULL; //Construct dummy pin
}
//Sanity check
if (_ctrl & LCD_C_SPI3_24) {
_init(_LCD_DL_8); // Set Datalength to 8 bit for all native serial interfaces
}
else {
error("Error: LCD Controller type does not support native SPI3 24 bits interface\n\r");
}
}
TextLCD_SPI_N_3_24::~TextLCD_SPI_N_3_24() {
if (_bl != NULL) {delete _bl;} // BL pin
}
// Not used in this mode
void TextLCD_SPI_N_3_24::_setEnable(bool value) {
}
// Set RS pin
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_SPI_N_3_24::_setRS(bool value) {
// The 24bit mode is split in 3 bytes. The first byte is for synchronisation and controlbits. The controlbits define the meaning of the next two bytes.
// Each byte encodes 4 actual bits. The 8 actual bits represent either a data or a command byte.
// b23 b22 b21 b20 b19 b18 b17 b16 - b15 b14 b13 b12 b11 b10 b9 b8 - b7 b6 b5 b4 b3 b2 b1 b0
// 1 1 1 1 1 RW RS 0 d0 d1 d2 d3 0 0 0 0 d4 d5 d6 d7 0 0 0 0
//
// RS=1 means that next byte is data, RS=0 means that next byte is command
// RW=0 means that next byte is writen, RW=1 means that next byte is read (not used in this lib)
//
// Note: SPI3_24 expects LSB first. This is inconsistent with regular SPI convention (and hardware) that sends MSB first.
if (value) {
_controlbyte = 0xFA; // Next byte is data
}
else {
_controlbyte = 0xF8; // Next byte is command
}
}
// Set BL pin
void TextLCD_SPI_N_3_24::_setBL(bool value) {
if (_bl) {
_bl->write(value);
}
}
// Not used in this mode
void TextLCD_SPI_N_3_24::_setData(int value) {
}
//Mapping table to flip the bits around cause SPI3_24 expects LSB first.
const uint8_t map3_24[16] = {0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0};
// Write a byte using SPI3 24 bits mode
void TextLCD_SPI_N_3_24::_writeByte(int value) {
_cs = 0;
wait_us(1);
_spi->write(_controlbyte);
//Map and send the LSB nibble
_spi->write( map3_24[value & 0x0F]);
//Map and send the MSB nibble
_spi->write( map3_24[(value >> 4) & 0x0F]);
wait_us(1);
_cs = 1;
}
#endif /* Native SPI bus */
//------- End TextLCD_SPI_N_3_24 ----------