Nathanaël Semhoun
A TextLCD interface for driving 4-bit HD44780-based LCDs.
Fork of
TextLCD
by 
Wim Huiskamp
Diff: TextLCD.cpp
- Revision:
- 29:a3663151aa65
- Parent:
- 28:30fa94f7341c
- Child:
- 30:033048611c01
--- a/TextLCD.cpp Sat Jun 14 17:04:25 2014 +0000
+++ b/TextLCD.cpp Tue Jun 17 17:41:47 2014 +0000
@@ -10,6 +10,7 @@
* 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
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
@@ -33,6 +34,11 @@
#include "TextLCD.h"
#include "mbed.h"
+
+DigitalOut led1(LED1);
+DigitalOut led2(LED2);
+
+
/** Create a TextLCD_Base interface
*
* @param type Sets the panel size/addressing mode (default = LCD16x2)
@@ -86,76 +92,281 @@
// Display is now in 4-bit mode
// Note: 4 bit mode is ignored for native SPI and I2C devices
- // Device specific initialisations for DC/DC converter to generate VLCD or VLED
+ // Device specific initialisations: DC/DC converter to generate VLCD or VLED, number of lines etc
switch (_ctrl) {
- case ST7036:
- // ST7036 controller: Initialise Voltage booster for VLCD. VDD=5V
- // Note: supports 1,2 or 3 lines
- _writeCommand(0x29); // 4-bit Databus, 2 Lines, Select Instruction Set = 1
- wait_ms(30); // > 26,3ms
- _writeCommand(0x14); // Bias: 1/5, 2-Lines LCD
-// _writeCommand(0x15); // Bias: 1/5, 3-Lines LCD
- wait_ms(30); // > 26,3ms
- _writeCommand(0x55); // Icon off, Booster on, Set Contrast C5, C4
- wait_ms(30); // > 26,3ms
- _writeCommand(0x6D); // Voltagefollower On, Ampl ratio Rab2, Rab1, Rab0
- wait_ms(200); // > 200ms!
- _writeCommand(0x78); // Set Contrast C3, C2, C1, C0
- wait_ms(30); // > 26,3ms
- _writeCommand(0x28); // Return to Instruction Set = 0
- wait_ms(50);
- break;
-
+ 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 LCD24x1:
+//@TODO check config
+ _writeCommand(0x20); // Function set 001 DL N F - -
+ // DL=0 (4 bits bus)
+ // N=0 (1 line)
+ // F=0 (5x7 dots font)
+ break;
+
+ case LCD24x4B:
+ // Special mode for KS0078
+ _writeCommand(0x2A); // Function set 001 DL N RE DH REV
+ // DL=0 (4 bits bus)
+ // N=1 (Dont care for KS0078)
+ // RE=0 (Dis. Extended Regs, special mode for KS0078)
+ // DH=1 (Disp shift, special mode for KS0078)
+ // REV=0 (Reverse, special mode for KS0078)
+
+ _writeCommand(0x2E); // Function set 001 DL N RE DH REV
+ // DL=0 (4 bits bus)
+ // N=1 (Dont care for KS0078)
+ // RE=1 (Ena Extended Regs, special mode for KS0078)
+ // DH=1 (Disp shift, special mode for KS0078)
+ // REV=0 (Reverse, special mode for KS0078)
+
+ _writeCommand(0x09); // Ext Function set 0000 1 FW BW NW
+ // FW=0 (5-dot font, special mode for KS0078)
+ // BW=0 (Cur BW invert disable, special mode for KS0078)
+ // NW=1 (4 Line, special mode for KS0078)
+
+ _writeCommand(0x2A); // Function set 001 DL N RE DH REV
+ // DL=0 (4 bits bus)
+ // N=1 (Dont care for KS0078)
+ // RE=0 (Dis. Extended Regs, special mode for KS0078)
+ // DH=1 (Disp shift, special mode for KS0078)
+ // REV=0 (Reverse, special mode for KS0078)
+
+ // All other LCD types are initialised as 2 Line displays (including LCD40x4)
+ default:
+//@TODO check config
+ _writeCommand(0x28); // 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
+
+ break; // case KS0078 Controller
+
case ST7032_3V3:
// ST7032 controller: Initialise Voltage booster for VLCD. VDD=3V3
-// _writeCommand(0x39); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Select Instruction Set = 1
- _writeCommand(0x29); //FUNCTION SET 4 bit, N=1 2-line display mode, 5*7dot, Select Instruction Set = 1
- //Note: 4 bit mode is ignored for native SPI and I2C devices
+ // 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(0x1C); //Internal OSC frequency adjustment Framefreq=183HZ, bias will be 1/4
+// _writeCommand(0x31); //FUNCTION SET 8 bit,N=0 1-line display mode,5*7dot, Select Instruction Set = 1
+ _writeCommand(0x21); //FUNCTION SET 4 bit, N=0 1-line display mode, 5*7dot, Select Instruction Set = 1
+ //Note: 4 bit mode is ignored for native SPI and I2C devices
+
+ _writeCommand(0x1C); //Internal OSC frequency adjustment Framefreq=183HZ, bias will be 1/4
- _writeCommand(0x73); //Contrast control low byte
+ _writeCommand(0x73); //Contrast control low byte
- _writeCommand(0x57); //booster circuit is turned on. /ICON display off. /Contrast control high byte
- wait_ms(10); // Wait 10ms to ensure powered up
+ _writeCommand(0x57); //booster circuit is turned on. /ICON display off. /Contrast control high byte
+ wait_ms(10); // Wait 10ms to ensure powered up
+
+ _writeCommand(0x6C); //Follower control
+ wait_ms(10); // Wait 10ms to ensure powered up
- _writeCommand(0x6C); //Follower control
- wait_ms(10); // Wait 10ms to ensure powered up
+// _writeCommand(0x30); //FUNCTION SET 8 bit,N=0 1-line display mode,5*7dot, Return to Instruction Set = 0
+ _writeCommand(0x20); //FUNCTION SET 4 bit, N=0 1-line display mode, 5*7dot, Return to Instruction Set = 0
+ //Note: 4 bit mode is ignored for native SPI and I2C devices
+
+ break;
+
+ default:
+ // All other LCD types are initialised as 2 Line displays
+
+// _writeCommand(0x39); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Select Instruction Set = 1
+ _writeCommand(0x29); //FUNCTION SET 4 bit, N=1 2-line display mode, 5*7dot, Select Instruction Set = 1
+ //Note: 4 bit mode is ignored for native SPI and I2C devices
+
+ _writeCommand(0x1C); //Internal OSC frequency adjustment Framefreq=183HZ, bias will be 1/4
+
+ _writeCommand(0x73); //Contrast control low byte
+
+ _writeCommand(0x57); //booster circuit is turned on. /ICON display off. /Contrast control high byte
+ wait_ms(10); // Wait 10ms to ensure powered up
-// _writeCommand(0x38); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Return to Instruction Set = 0
- _writeCommand(0x28); //FUNCTION SET 4 bit, N=1 2-line display mode, 5*7dot, Return to Instruction Set = 0
- //Note: 4 bit mode is ignored for native SPI and I2C devices
-
- _writeCommand(0x14); // Cursor or Display shift 0001 S/C R/L x x
- // S/C=0 Cursor moves
- // R/L=1 Right
- //
- break;
+ _writeCommand(0x6C); //Follower control
+ wait_ms(10); // Wait 10ms to ensure powered up
+
+// _writeCommand(0x38); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Return to Instruction Set = 0
+ _writeCommand(0x28); //FUNCTION SET 4 bit, N=1 2-line display mode, 5*7dot, Return to Instruction Set = 0
+ //Note: 4 bit mode is ignored for native SPI and I2C devices
+ } // switch type
+
+ break; // case ST7032_3V3 Controller
case ST7032_5V:
// ST7032 controller: Disable Voltage booster for VLCD. VDD=5V
-// _writeCommand(0x39); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Instruction Set = 1
- _writeCommand(0x29); //FUNCTION SET 4 bit, N=1 2-line display mode, 5*7dot, Select Instruction Set = 1
- //Note: 4 bit mode is ignored for native SPI and I2C devices
+
+ // 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(0x31); //FUNCTION SET 8 bit,N=0 1-line display mode,5*7dot, Select Instruction Set = 1
+ _writeCommand(0x21); //FUNCTION SET 4 bit, N=0 1-line display mode, 5*7dot, Select Instruction Set = 1
+ //Note: 4 bit mode is ignored for native SPI and I2C devices
+
+ _writeCommand(0x1C); //Internal OSC frequency adjustment Framefreq=183HZ, bias will be 1/4
+
+ _writeCommand(0x73); //Contrast control low byte
- _writeCommand(0x1C); //Internal OSC frequency adjustment 183HZ, bias will be 1/4
+ _writeCommand(0x53); //booster circuit is turned off. /ICON display off. /Contrast control high byte
+ wait_ms(10); // Wait 10ms to ensure powered up
+
+ _writeCommand(0x6C); //Follower control
+ wait_ms(10); // Wait 10ms to ensure powered up
+
+// _writeCommand(0x30); //FUNCTION SET 8 bit,N=0 1-line display mode,5*7dot, Return to Instruction Set = 0
+ _writeCommand(0x20); //FUNCTION SET 4 bit, N=0 1-line display mode, 5*7dot, Return to Instruction Set = 0
+ //Note: 4 bit mode is ignored for native SPI and I2C devices
+
+ break;
- _writeCommand(0x73); //Contrast control low byte
+ default:
+ // All other LCD types are initialised as 2 Line displays
+
+// _writeCommand(0x39); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Select Instruction Set = 1
+ _writeCommand(0x29); //FUNCTION SET 4 bit, N=1 2-line display mode, 5*7dot, Select Instruction Set = 1
+ //Note: 4 bit mode is ignored for native SPI and I2C devices
+
+ _writeCommand(0x1C); //Internal OSC frequency adjustment Framefreq=183HZ, bias will be 1/4
+
+ _writeCommand(0x73); //Contrast control low byte
+
+ _writeCommand(0x53); //booster circuit is turned off. /ICON display off. /Contrast control high byte
+ wait_ms(10); // Wait 10ms to ensure powered up
+
+ _writeCommand(0x6C); //Follower control
+ wait_ms(10); // Wait 10ms to ensure powered up
+
+// _writeCommand(0x38); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Return to Instruction Set = 0
+ _writeCommand(0x28); //FUNCTION SET 4 bit, N=1 2-line display mode, 5*7dot, Return to Instruction Set = 0
+ //Note: 4 bit mode is ignored for native SPI and I2C devices
+ } // switch type
+
+ break; // case ST7032_5V Controller
- _writeCommand(0x53); //booster circuit is turned off. /ICON display off. /Contrast control high byte
- wait_ms(10); // Wait 10ms to ensure powered up
-
- _writeCommand(0x6C); //Follower control
- wait_ms(10); // Wait 10ms to ensure powered up
+ case ST7036:
+ // ST7036 controller: Initialise Voltage booster for VLCD. VDD=5V
+ // Note: supports 1,2 or 3 lines
-// _writeCommand(0x38); //FUNCTION SET 8 bit,N=1 2-line display mode,5*7dot, Instruction Set = 0
- _writeCommand(0x28); //FUNCTION SET 4 bit, N=1 2-line display mode, 5*7dot, Return to Instruction Set = 0
- //Note: 4 bit mode is ignored for native SPI and I2C devices
+ // 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(0x21); // 4-bit Databus, N=0 1 Line, DH=0 5x7font, IS2,IS1 = 01 Select Instruction Set = 1
+ wait_ms(30); // > 26,3ms
+ _writeCommand(0x14); // Bias: 1/5, 1 or 2-Lines LCD
+// _writeCommand(0x15); // Bias: 1/5, 3-Lines LCD
+ wait_ms(30); // > 26,3ms
+ _writeCommand(0x55); // Icon off, Booster on, Set Contrast C5, C4
+ wait_ms(30); // > 26,3ms
+ _writeCommand(0x6D); // Voltagefollower On, Ampl ratio Rab2, Rab1, Rab0
+ wait_ms(200); // > 200ms!
+ _writeCommand(0x78); // Set Contrast C3, C2, C1, C0
+ wait_ms(30); // > 26,3ms
+ _writeCommand(0x20); // Return to Instruction Set = 0
+ wait_ms(50);
+ break;
+#if(0)
+// case LCD12x3:
+ case LCD16x3:
+ _writeCommand(0x29); // 4-bit Databus, N=1 2 Line, DH=0 5x7font, IS2,IS1 = 01 Select Instruction Set = 1
+ wait_ms(30); // > 26,3ms
+// _writeCommand(0x14); // Bias: 1/5, 1 or 2-Lines LCD
+ _writeCommand(0x15); // Bias: 1/5, 3-Lines LCD
+ wait_ms(30); // > 26,3ms
+ _writeCommand(0x55); // Icon off, Booster on, Set Contrast C5, C4
+ wait_ms(30); // > 26,3ms
+ _writeCommand(0x6D); // Voltagefollower On, Ampl ratio Rab2, Rab1, Rab0
+ wait_ms(200); // > 200ms!
+ _writeCommand(0x78); // Set Contrast C3, C2, C1, C0
+ wait_ms(30); // > 26,3ms
+ _writeCommand(0x28); // Return to Instruction Set = 0
+ wait_ms(50);
+ break;
+#endif
+ default:
+ // All other LCD types are initialised as 2 Line displays
+ _writeCommand(0x29); // 4-bit Databus, N=1 2 Line, DH=0 5x7font, IS2,IS1 = 01 Select Instruction Set = 1
+ wait_ms(30); // > 26,3ms
+ _writeCommand(0x14); // Bias: 1/5, 2-Lines LCD
+// _writeCommand(0x15); // Bias: 1/5, 3-Lines LCD
+ wait_ms(30); // > 26,3ms
+ _writeCommand(0x55); // Icon off, Booster on, Set Contrast C5, C4
+ wait_ms(30); // > 26,3ms
+ _writeCommand(0x6D); // Voltagefollower On, Ampl ratio Rab2, Rab1, Rab0
+ wait_ms(200); // > 200ms!
+ _writeCommand(0x78); // Set Contrast C3, C2, C1, C0
+ wait_ms(30); // > 26,3ms
+ _writeCommand(0x28); // Return to Instruction Set = 0
+ wait_ms(50);
+ } // switch type
+
+ break; // case ST7036 Controller
+
+ case PCF21XX_3V3:
+ // PCF21XX controller: Initialise Voltage booster for VLCD. VDD=3V3
- break;
-
+ // 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(0x22); //FUNCTION SET 4 bit, N=0/M=0 1-line/24 chars display mode, G=1 Booster on
+ //Note: 4 bit mode is ignored for I2C mode
+ wait_ms(10); // Wait 10ms to ensure powered up
+ break;
+
+ case LCD12x3B:
+ case LCD12x4B:
+ _writeCommand(0x2E); //FUNCTION SET 4 bit, N=1/M=1 4-line/12 chars display mode, G=1 Booster on
+ //Note: 4 bit mode is ignored for I2C mode
+ wait_ms(10); // Wait 10ms to ensure powered up
+ break;
+
+ default:
+ // All other LCD types are initialised as 2 Line displays
+ _writeCommand(0x2A); //FUNCTION SET 4 bit, N=1/M=0 2-line/24 chars display mode, G=1 Booster on
+ //Note: 4 bit mode is ignored for I2C mode
+
+ wait_ms(10); // Wait 10ms to ensure powered up
+
+
+ led1=!led1;
+ } // switch type
+
+
+ break; // case PCF21XX_3V3 Controller
+
+
+// case PCF21XX_5V:
+ // PCF21XX controller: No Voltage booster for VLCD. VDD=5V
+
+
case WS0010:
// WS0010 OLED controller: Initialise DC/DC Voltage converter for LEDs
// Note: supports 1 or 2 lines (and 16x100 graphics)
@@ -170,66 +381,68 @@
_writeCommand(0x17); // DC/DC on
wait_ms(10); // Wait 10ms to ensure powered up
- break;
-
+
+ // 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 - -
+ // DL=0 (4 bits bus)
+ // N=0 (1 line)
+ // F=0 (5x7 dots font)
+ break;
+
+ default:
+ // All other LCD types are initialised as 2 Line displays (including LCD40x4)
+ _writeCommand(0x28); // Function set 001 DL N F - -
+ // DL=0 (4 bits bus)
+ // N=1 (2 lines)
+ // F=0 (5x7 dots font, only option for 2 line display)
+ // - (Don't care)
+
+ break;
+ } // switch type
+
+ break; // case WS0100 Controller
+
default:
- // Devices that do not use DC/DC Voltage converters but external VLCD
- break;
- }
-
- // Initialise Display configuration
- switch (_type) {
- case LCD8x1:
- case LCD8x2B:
- //8x1 is a regular 1 line display
- //8x2B is a special case of 16x1
- _writeCommand(0x20); // Function set 001 DL N F - -
- // DL=0 (4 bits bus)
- // N=0 (1 line)
- // F=0 (5x7 dots font)
- break;
-
- case LCD24x4:
- // Special mode for KS0078
- _writeCommand(0x2A); // Function set 001 DL N RE DH REV
- // DL=0 (4 bits bus)
- // N=1 (Dont care for KS0078)
- // RE=0 (Extended Regs, special mode for KS0078)
- // DH=1 (Disp shift, special mode for KS0078)
- // REV=0 (Reverse, special mode for KS0078)
+ // Devices fully compatible to HD44780 that do not use any DC/DC Voltage converters but external VLCD
- _writeCommand(0x2E); // Function set 001 DL N RE DH REV
- // DL=0 (4 bits bus)
- // N=1 (Dont care for KS0078)
- // RE=1 (Ena Extended Regs, special mode for KS0078)
- // DH=1 (Disp shift, special mode for KS0078)
- // REV=0 (Reverse, special mode for KS0078)
-
- _writeCommand(0x09); // Ext Function set 0000 1 FW BW NW
- // FW=0 (5-dot font, special mode for KS0078)
- // BW=0 (Cur BW invert disable, special mode for KS0078)
- // NW=1 (4 Line, special mode for 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 LCD24x1:
+ _writeCommand(0x20); // Function set 001 DL N F - -
+ // DL=0 (4 bits bus)
+ // N=0 (1 line)
+ // F=0 (5x7 dots font)
+ break;
+
+ // All other LCD types are initialised as 2 Line displays (including LCD40x4)
+ default:
+ _writeCommand(0x28); // 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(0x2A); // Function set 001 DL N RE DH REV
- // DL=0 (4 bits bus)
- // N=1 (Dont care for KS0078)
- // RE=0 (Dis. Extended Regs, special mode for KS0078)
- // DH=1 (Disp shift, special mode for KS0078)
- // REV=0 (Reverse, special mode for KS0078)
- break;
-
-// All other LCD types are initialised as 2 Line displays (including LCD40x4)
- default:
- _writeCommand(0x28); // 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;
- }
+ 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
@@ -242,10 +455,17 @@
// 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);
+ led2=!led2;
}
@@ -262,28 +482,31 @@
// 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
+ 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
+ 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);
}
- _row=0; // Reset Cursor location
- _column=0;
+ setAddress(0, 0); // Reset Cursor location
+ // Note: this is needed because some rare displays (eg PCF21XX) don't use line 0 in the '3 Line' mode.
}
-/** Move cursor to selected row and column
- */
+/** 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:
@@ -433,12 +656,26 @@
// 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
+ * @param return The memoryaddress of screen column and row location
+ */
int TextLCD_Base::getAddress(int column, int row) {
switch (_type) {
case LCD8x1:
+ case LCD24x1:
return 0x00 + column;
+ case LCD16x1:
+ // LCD16x1 is a special layout of LCD8x2
+ if (column<8)
+ return 0x00 + column;
+ else
+ return 0x40 + (column - 8);
+
case LCD8x2B:
// LCD8x2B is a special layout of LCD16x1
if (row==0)
@@ -446,26 +683,44 @@
else
return 0x08 + column;
- case LCD16x1:
- // LCD16x1 is a special layout of LCD8x2
- if (column<8)
- return 0x00 + column;
- else
- return 0x40 + (column - 8);
+ case LCD8x2:
+ case LCD12x2:
+ case LCD16x2:
+ case LCD20x2:
+ case LCD24x2:
+ case LCD40x2:
+ return 0x00 + (row * 0x40) + column;
-#if(0)
+// Not sure about this one, seems wrong.
+// Left in for compatibility with original library
+ case LCD16x2B:
+ return 0x00 + (row * 40) + column;
+
+
// Special mode for ST7036
// case LCD16x3:
-// Special mode for PCF2116 (and KS0078)
- case LCD12x3:
+// Special mode for PCF2116
+ case LCD12x3B:
+ switch (row) {
+ case 0:
+ return 0x20 + column;
+ case 1:
+ return 0x40 + column;
+ case 2:
+ return 0x60 + column;
+ }
+
+ case LCD12x4:
switch (row) {
case 0:
return 0x00 + column;
case 1:
- return 0x20 + column;
+ return 0x40 + column;
case 2:
- return 0x40 + column;
+ return 0x0C + column;
+ case 3:
+ return 0x4C + column;
}
// Special mode for PCF2116 (and KS0078)
@@ -481,20 +736,6 @@
return 0x60 + column;
}
-#endif
-
- case LCD12x4:
- switch (row) {
- case 0:
- return 0x00 + column;
- case 1:
- return 0x40 + column;
- case 2:
- return 0x0C + column;
- case 3:
- return 0x4C + column;
- }
-
case LCD16x4:
switch (row) {
case 0:
@@ -520,7 +761,7 @@
}
// Special mode for KS0078
- case LCD24x4:
+ case LCD24x4B:
switch (row) {
case 0:
return 0x00 + column;
@@ -532,19 +773,6 @@
return 0x60 + column;
}
-// Not sure about this one, seems wrong.
-// Left in for compatibility with original library
- case LCD16x2B:
- return 0x00 + (row * 40) + column;
-
- case LCD8x2:
- case LCD12x2:
- case LCD16x2:
- case LCD20x2:
- case LCD24x2:
- case LCD40x2:
- return 0x00 + (row * 0x40) + column;
-
case LCD40x4:
// LCD40x4 is a special case since it has 2 controllers
// Each controller is configured as 40x2
@@ -588,8 +816,11 @@
}
-// Set row, column and update memoryaddress.
-//
+/** 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
@@ -617,6 +848,11 @@
_writeCommand(0x80 | addr);
}
+
+/** Return the number of columns
+ *
+ * @param return The number of columns
+ */
int TextLCD_Base::columns() {
switch (_type) {
case LCD8x1:
@@ -625,9 +861,9 @@
return 8;
case LCD12x2:
-// case LCD12x3:
+ case LCD12x3B:
case LCD12x4:
-// case LCD12x4B:
+ case LCD12x4B:
return 12;
case LCD16x1:
@@ -641,8 +877,9 @@
case LCD20x4:
return 20;
+ case LCD24x1:
case LCD24x2:
- case LCD24x4:
+ case LCD24x4B:
return 24;
case LCD40x2:
@@ -655,10 +892,15 @@
}
}
+/** Return the number of rows
+ *
+ * @param return The number of rows
+ */
int TextLCD_Base::rows() {
switch (_type) {
case LCD8x1:
case LCD16x1:
+ case LCD24x1:
return 1;
case LCD8x2:
@@ -671,15 +913,15 @@
case LCD40x2:
return 2;
-// case LCD12x3:
+ case LCD12x3B:
// case LCD16x3:
-// return 3;
+ return 3;
case LCD12x4:
-// case LCD12x4B:
+ case LCD12x4B:
case LCD16x4:
case LCD20x4:
- case LCD24x4:
+ case LCD24x4B:
case LCD40x4:
return 4;
@@ -689,8 +931,10 @@
}
}
-
-// Set the Cursor Mode (Cursor Off & Blink Off, Cursor On & Blink Off, Cursor Off & Blink On, Cursor On & Blink On
+/** 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
@@ -701,7 +945,10 @@
}
-// Set the Displaymode (On/Off)
+/** 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
@@ -745,14 +992,19 @@
}
-// Set the Displaymode (On/Off) and Cursortype for current controller
+/** 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
_writeCommand(0x08 | displayMode | cursorType);
}
-// Set the Backlight mode (Off/On)
+
+/** Set the Backlight mode
+ *
+ * @param backlightMode The Backlight mode (LightOff, LightOn)
+ */
void TextLCD_Base::setBacklight(LCDBacklight backlightMode) {
if (backlightMode == LightOn) {
@@ -763,7 +1015,11 @@
}
}
-
+/** Set User Defined Characters
+ *
+ * @param unsigned char c The Index of the UDC (0..7)
+ * @param char *udc_data The bitpatterns for the UDC (8 bytes of 5 significant bits)
+ */
void TextLCD_Base::setUDC(unsigned char c, char *udc_data) {
// Select and configure second LCD controller when needed
@@ -792,6 +1048,8 @@
}
+/** Low level method to store user defined characters for current controller
+ */
void TextLCD_Base::_setUDC(unsigned char c, char *udc_data) {
// Select CG RAM for current LCD controller
@@ -854,6 +1112,18 @@
}
+
+/** 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
@@ -917,16 +1187,6 @@
_d = value & 0x0F; // Write Databits
}
-/** 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
-}
-
//----------- End TextLCD ---------------
@@ -1150,10 +1410,10 @@
_slaveAddress = deviceAddress & 0xFE;
-
// Setup the I2C bus
- // The max bitrate for ST7032 is 400kbit,
-// _i2c->frequency(100000);
+ // The max bitrate for ST7032i is 400kbit, lets stick to default here
+ _i2c->frequency(100000);
+// _i2c->frequency(50000);
// The hardware Backlight pin is optional. Test and make sure whether it exists or not to prevent illegal access.
@@ -1196,6 +1456,12 @@
}
}
+
+// Not used in this mode
+void TextLCD_I2C_N::_setData(int value) {
+}
+
+
// Write a byte using I2C
void TextLCD_I2C_N::_writeByte(int value) {
@@ -1204,10 +1470,6 @@
_i2c->write(_slaveAddress, data, 2);
}
-
-// Not used in this mode
-void TextLCD_I2C_N::_setData(int value) {
-}
//-------- End TextLCD_I2C_N ------------
@@ -1313,7 +1575,6 @@
}
-
// Place the 4bit data on the databus
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_SPI::_setData(int value) {
@@ -1429,6 +1690,11 @@
}
}
+// 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;
@@ -1438,9 +1704,6 @@
_cs = 1;
}
-// Not used in this mode
-void TextLCD_SPI_N::_setData(int value) {
-}
//-------- End TextLCD_SPI_N ------------