Joachim Andersen
1
TextLCD.h
- Committer:
- wim
- Date:
- 2014-06-29
- Revision:
- 31:ef31cd8a00d1
- Parent:
- 30:033048611c01
- Child:
- 32:59c4b8f648d4
File content as of revision 31:ef31cd8a00d1:
/* mbed TextLCD Library, for a 4-bit LCD based on HD44780
* 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 DigitalOut 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
* 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.
*/
#ifndef MBED_TEXTLCD_H
#define MBED_TEXTLCD_H
#include "mbed.h"
/** A TextLCD interface for driving 4-bit HD44780-based LCDs
*
* Currently supports 8x1, 8x2, 12x3, 12x4, 16x1, 16x2, 16x4, 20x2, 20x4, 24x1, 24x2, 24x4, 40x2 and 40x4 panels
* Interface options include direct mbed pins, I2C portexpander (PCF8474/PCF8574A or MCP23008) or SPI bus shiftregister (74595).
* Supports some controllers with native I2C or SP interface. Supports some controllers that provide internal DC/DC converters for VLCD or VLED.
*
* @code
* #include "mbed.h"
* #include "TextLCD.h"
*
* // I2C Communication
* I2C i2c_lcd(p28,p27); // SDA, SCL
*
* // SPI Communication
* SPI spi_lcd(p5, NC, p7); // MOSI, MISO, SCLK
*
* //TextLCD lcd(p15, p16, p17, p18, p19, p20); // RS, E, D4-D7, LCDType=LCD16x2, BL=NC, E2=NC, LCDTCtrl=HD44780
* //TextLCD_SPI lcd(&spi_lcd, p8, TextLCD::LCD40x4); // SPI bus, 74595 expander, CS pin, LCD Type
* TextLCD_I2C lcd(&i2c_lcd, 0x42, TextLCD::LCD20x4); // I2C bus, PCF8574 Slaveaddress, LCD Type
* //TextLCD_I2C lcd(&i2c_lcd, 0x42, TextLCD::LCD16x2, TextLCD::WS0010); // I2C bus, PCF8574 Slaveaddress, LCD Type, Device Type
* //TextLCD_SPI_N lcd(&spi_lcd, p8, p9); // SPI bus, CS pin, RS pin, LCDType=LCD16x2, BL=NC, LCDTCtrl=ST7032_3V3
* //TextLCD_I2C_N lcd(&i2c_lcd, ST7032_SA, TextLCD::LCD16x2, NC, TextLCD::ST7032_3V3); // I2C bus, Slaveaddress, LCD Type, BL=NC, LCDTCtrl=ST7032_3V3
*
* int main() {
* lcd.printf("Hello World!\n");
* }
* @endcode
*/
//Pin Defines for I2C PCF8574/PCF8574A or MCP23008 and SPI 74595 bus expander interfaces
//LCD and serial portexpanders should be wired accordingly
//
//Select Hardware module (one option only)
#define DEFAULT 1
#define ADAFRUIT 0
#define DFROBOT 0
#if (DEFAULT==1)
//Definitions for default (WH) mapping between serial port expander pins and LCD controller
//This hardware supports the I2C bus expander (PCF8574/PCF8574A or MCP23008) and SPI bus expander (74595) interfaces
//See https://mbed.org/cookbook/Text-LCD-Enhanced
//
//Note: LCD RW pin must be connected to GND
// E2 is used for LCD40x4 (second controller)
// BL may be used to control backlight
#define D_LCD_PIN_D4 0
#define D_LCD_PIN_D5 1
#define D_LCD_PIN_D6 2
#define D_LCD_PIN_D7 3
#define D_LCD_PIN_RS 4
#define D_LCD_PIN_E 5
#define D_LCD_PIN_E2 6
#define D_LCD_PIN_BL 7
#define D_LCD_PIN_RW D_LCD_PIN_E2
//Select I2C Portexpander type (one option only)
#define PCF8574 1
#define MCP23008 0
#endif
#if (ADAFRUIT==1)
//Definitions for Adafruit i2cspilcdbackpack mapping between serial port expander pins and LCD controller
//This hardware supports both an I2C expander (MCP23008) and an SPI expander (74595) selectable by a jumper.
//See http://www.ladyada.net/products/i2cspilcdbackpack
//
//Note: LCD RW pin must be kept LOW
// E2 is not available on this hardware and so it does not support LCD40x4 (second controller)
// BL is used to control backlight
#define D_LCD_PIN_0 0
#define D_LCD_PIN_RS 1
#define D_LCD_PIN_E 2
#define D_LCD_PIN_D4 3
#define D_LCD_PIN_D5 4
#define D_LCD_PIN_D6 5
#define D_LCD_PIN_D7 6
#define D_LCD_PIN_BL 7
#define D_LCD_PIN_E2 D_LCD_PIN_0
//Force I2C portexpander type
#define PCF8574 0
#define MCP23008 1
#endif
#if (DFROBOT==1)
//Definitions for DFROBOT LCD2004 Module mapping between serial port expander pins and LCD controller
//This hardware uses PCF8574 and is different from earlier/different Arduino I2C LCD displays
//See http://arduino-info.wikispaces.com/LCD-Blue-I2C
//
//Note: LCD RW pin must be kept LOW
// E2 is not available on default Arduino hardware and so it does not support LCD40x4 (second controller)
// BL is used to control backlight
#define D_LCD_PIN_RS 0
#define D_LCD_PIN_RW 1
#define D_LCD_PIN_E 2
#define D_LCD_PIN_BL 3
#define D_LCD_PIN_D4 4
#define D_LCD_PIN_D5 5
#define D_LCD_PIN_D6 6
#define D_LCD_PIN_D7 7
#define D_LCD_PIN_E2 D_LCD_PIN_RW
//Force I2C portexpander type
#define PCF8574 1
#define MCP23008 0
#endif
//Bitpattern Defines for I2C PCF8574/PCF8574A, MCP23008 and SPI 74595 Bus expanders
//
#define D_LCD_D4 (1<<D_LCD_PIN_D4)
#define D_LCD_D5 (1<<D_LCD_PIN_D5)
#define D_LCD_D6 (1<<D_LCD_PIN_D6)
#define D_LCD_D7 (1<<D_LCD_PIN_D7)
#define D_LCD_RS (1<<D_LCD_PIN_RS)
#define D_LCD_E (1<<D_LCD_PIN_E)
#define D_LCD_E2 (1<<D_LCD_PIN_E2)
#define D_LCD_BL (1<<D_LCD_PIN_BL)
//#define D_LCD_RW (1<<D_LCD_PIN_RW)
#define D_LCD_BUS_MSK (D_LCD_D4 | D_LCD_D5 | D_LCD_D6 | D_LCD_D7)
#define D_LCD_BUS_DEF 0x00
/* PCF8574/PCF8574A I2C portexpander slave address */
#define PCF8574_SA0 0x40
#define PCF8574_SA1 0x42
#define PCF8574_SA2 0x44
#define PCF8574_SA3 0x46
#define PCF8574_SA4 0x48
#define PCF8574_SA5 0x4A
#define PCF8574_SA6 0x4C
#define PCF8574_SA7 0x4E
#define PCF8574A_SA0 0x70
#define PCF8574A_SA1 0x72
#define PCF8574A_SA2 0x74
#define PCF8574A_SA3 0x76
#define PCF8574A_SA4 0x78
#define PCF8574A_SA5 0x7A
#define PCF8574A_SA6 0x7C
#define PCF8574A_SA7 0x7E
/* MCP23008 I2C portexpander slave address */
#define MCP23008_SA0 0x40
#define MCP23008_SA1 0x42
#define MCP23008_SA2 0x44
#define MCP23008_SA3 0x46
#define MCP23008_SA4 0x48
#define MCP23008_SA5 0x4A
#define MCP23008_SA6 0x4C
#define MCP23008_SA7 0x4E
/* MCP23008 I2C portexpander internal registers */
#define IODIR 0x00
#define IPOL 0x01
#define GPINTEN 0x02
#define DEFVAL 0x03
#define INTCON 0x04
#define IOCON 0x05
#define GPPU 0x06
#define INTF 0x07
#define INTCAP 0x08
#define GPIO 0x09
#define OLAT 0x0A
/* ST7032I I2C slave address */
#define ST7032_SA 0x7C
/* PCF21XX I2C slave address */
#define PCF21XX_SA0 0x74
#define PCF21XX_SA1 0x76
/* AIP31068 I2C slave address */
#define AIP31068_SA 0x7C
/* LCD Type information on Rows, Columns and Variant. This information is encoded in
* an int and used for the LCDType enumerators in order to simplify code maintenance */
// Columns encoded in b7..b0
#define LCD_T_COL_MSK 0x000000FF
#define LCD_T_C8 0x00000008
#define LCD_T_C10 0x0000000A
#define LCD_T_C12 0x0000000C
#define LCD_T_C16 0x00000010
#define LCD_T_C20 0x00000014
#define LCD_T_C24 0x00000018
#define LCD_T_C32 0x00000020
#define LCD_T_C40 0x00000028
// Rows encoded in b15..b8
#define LCD_T_ROW_MSK 0x0000FF00
#define LCD_T_R1 0x00000100
#define LCD_T_R2 0x00000200
#define LCD_T_R3 0x00000300
#define LCD_T_R4 0x00000400
// Addressing mode encoded in b19..b16
#define LCD_T_ADR_MSK 0x000F0000
#define LCD_T_A 0x00000000 /*Mode A (Default), 1, 2 or 4 line display */
#define LCD_T_B 0x00010000 /*Mode B, Alternate 8x2 (actually 16x1 display) */
#define LCD_T_C 0x00020000 /*Mode C, Alternate 16x1 (actually 8x2 display) */
#define LCD_T_D 0x00030000 /*Mode D, Alternate 3 or 4 line display (12x4, 24x4) */
#define LCD_T_D1 0x00040000 /*Mode D1, Alternate 3 or 4 line display (12x4, 24x4) */
#define LCD_T_E 0x00050000 /*Mode E, 4x40 display (actually two 40x2) */
/* LCD Ctrl information on interface support and features. This information is encoded in
* an int and used for the LCDCtrl enumerators in order to simplify code maintenance */
// Interface encoded in b31..b24
#define LCD_C_BUS_MSK 0xFF000000
#define LCD_C_PAR 0x01000000 /*Parallel 4 or 8 bit data, E pin */
#define LCD_C_SPI3_9 0x02000000 /*SPI 3 line (MOSI, SCL, CS pins), 9 bits (RS + 8 Data) */
#define LCD_C_SPI3_10 0x04000000 /*SPI 3 line (MOSI, SCL, CS pins), 10 bits (RS, RW + 8 Data) */
#define LCD_C_SPI4 0x08000000 /*SPI 4 line (MOSI, SCL, CS, RS pin) */
#define LCD_C_I2C 0x10000000 /*I2C (SDA, SCL pin) */
// Features encoded in b23..b16
#define LCD_C_FTR_MSK 0x00FF0000
#define LCD_C_BST 0x00010000 /*Booster */
#define LCD_C_CTR 0x00010000 /*Contrast Control */
#define LCD_C_ICN 0x00020000 /*Icons */
/** Some sample User Defined Chars 5x7 dots */
extern const char udc_ae[]; //æ
extern const char udc_0e[]; //ø
extern const char udc_ao[]; //å
extern const char udc_AE[]; //Æ
extern const char udc_0E[]; //Ø
extern const char udc_Ao[]; //Å
extern const char udc_PO[]; //Padlock Open
extern const char udc_PC[]; //Padlock Closed
extern const char udc_0[]; // |>
extern const char udc_1[]; // <|
extern const char udc_2[]; // |
extern const char udc_3[]; // ||
extern const char udc_4[]; // |||
extern const char udc_5[]; // =
extern const char udc_6[]; // checkerboard
extern const char udc_7[]; // \
extern const char udc_degr[]; // Degree symbol
extern const char udc_TM_T[]; // Trademark T
extern const char udc_TM_M[]; // Trademark M
//extern const char udc_Bat_Hi[]; // Battery Full
//extern const char udc_Bat_Ha[]; // Battery Half
//extern const char udc_Bat_Lo[]; // Battery Low
extern const char udc_Bat_Hi[]; // Battery Full
extern const char udc_Bat_Ha[]; // Battery Half
extern const char udc_Bat_Lo[]; // Battery Low
extern const char udc_AC[]; // AC Power
//extern const char udc_smiley[]; // Smiley
//extern const char udc_droopy[]; // Droopey
//extern const char udc_note[]; // Note
//extern const char udc_bar_1[]; // Bar 1
//extern const char udc_bar_2[]; // Bar 11
//extern const char udc_bar_3[]; // Bar 111
//extern const char udc_bar_4[]; // Bar 1111
//extern const char udc_bar_5[]; // Bar 11111
//extern const char udc_ch_1[]; // Hor bars 4
//extern const char udc_ch_2[]; // Hor bars 4 (inverted)
//extern const char udc_ch_3[]; // Ver bars 3
//extern const char udc_ch_4[]; // Ver bars 3 (inverted)
//extern const char udc_ch_yr[]; // Year (kana)
//extern const char udc_ch_mo[]; // Month (kana)
//extern const char udc_ch_dy[]; // Day (kana)
//extern const char udc_ch_mi[]; // minute (kana)
/** A TextLCD interface for driving 4-bit HD44780-based LCDs
*
* @brief Currently supports 8x1, 8x2, 12x2, 12x4, 16x1, 16x2, 16x4, 20x2, 20x4, 24x2, 24x4, 40x2 and 40x4 panels
* Interface options include direct mbed pins, I2C portexpander (PCF8474/PCF8574A or MCP23008) or SPI bus shiftregister (74595) and some native I2C or SPI devices
*
*/
class TextLCD_Base : public Stream {
public:
/** LCD panel format */
enum LCDType {
LCD8x1 = (LCD_T_A | LCD_T_C8 | LCD_T_R1), /**< 8x1 LCD panel */
LCD8x2 = (LCD_T_A | LCD_T_C8 | LCD_T_R2), /**< 8x2 LCD panel */
LCD8x2B = (LCD_T_D | LCD_T_C8 | LCD_T_R2), /**< 8x2 LCD panel (actually 16x1) */
// LCD12x1 = (LCD_T_A | LCD_T_C12 | LCD_T_R1), /**< 12x1 LCD panel */
LCD12x2 = (LCD_T_A | LCD_T_C12 | LCD_T_R2), /**< 12x2 LCD panel */
LCD12x3D = (LCD_T_D | LCD_T_C12 | LCD_T_R3), /**< 12x3 LCD panel, special mode PCF21XX */
LCD12x3D1 = (LCD_T_D1 | LCD_T_C12 | LCD_T_R3), /**< 12x3 LCD panel, special mode PCF21XX */
LCD12x4 = (LCD_T_A | LCD_T_C12 | LCD_T_R4), /**< 12x4 LCD panel */
LCD12x4D = (LCD_T_B | LCD_T_C12 | LCD_T_R4), /**< 12x4 LCD panel, special mode PCF21XX */
LCD16x1 = (LCD_T_A | LCD_T_C16 | LCD_T_R1), /**< 16x1 LCD panel */
LCD16x1C = (LCD_T_C | LCD_T_C16 | LCD_T_R1), /**< 16x1 LCD panel (actually 8x2) */
LCD16x2 = (LCD_T_A | LCD_T_C16 | LCD_T_R2), /**< 16x2 LCD panel (default) */
// LCD16x2B = (LCD_T_B | LCD_T_C16 | LCD_T_R2), /**< 16x2 LCD panel, alternate addressing, wrong.. */
// LCD16x3D = (LCD_T_D | LCD_T_C16 | LCD_T_R3), /**< 16x3 LCD panel, special mode ST7036 */
LCD16x4 = (LCD_T_A | LCD_T_C16 | LCD_T_R4), /**< 16x4 LCD panel */
// LCD20x1 = (LCD_T_A | LCD_T_C20 | LCD_T_R1), /**< 20x1 LCD panel */
LCD20x2 = (LCD_T_A | LCD_T_C20 | LCD_T_R2), /**< 20x2 LCD panel */
LCD20x4 = (LCD_T_A | LCD_T_C20 | LCD_T_R4), /**< 20x4 LCD panel */
LCD24x1 = (LCD_T_A | LCD_T_C24 | LCD_T_R1), /**< 24x1 LCD panel */
LCD24x2 = (LCD_T_A | LCD_T_C24 | LCD_T_R2), /**< 24x2 LCD panel */
LCD24x4D = (LCD_T_D | LCD_T_C24 | LCD_T_R4), /**< 24x4 LCD panel, special mode KS0078 */
// LCD40x1 = (LCD_T_A | LCD_T_C40 | LCD_T_R1), /**< 40x1 LCD panel */
LCD40x2 = (LCD_T_A | LCD_T_C40 | LCD_T_R2), /**< 40x2 LCD panel */
LCD40x4 = (LCD_T_E | LCD_T_C40 | LCD_T_R4) /**< 40x4 LCD panel, Two controller version */
};
/** LCD Controller Device */
enum LCDCtrl {
HD44780 = 0, /**< HD44780 (default) */
WS0010 = 1 | (LCD_C_SPI3_10 | LCD_C_BST), /**< WS0010 OLED Controller, 4/8 bit, SPI3 */
ST7036 = 2 | (LCD_C_SPI4 | LCD_C_BST), /**< ST7036 3V3 with Booster, 4/8 bit, SPI4 */
ST7032_3V3 = 3 | (LCD_C_SPI4 | LCD_C_I2C | LCD_C_BST), /**< ST7032 3V3 with Booster, 4/8 bit, SPI4, I2C */
ST7032_5V = 4 | (LCD_C_SPI4 | LCD_C_I2C), /**< ST7032 5V no Booster, 4/8 bit, SPI4, I2C */
KS0078 = 5, /**< KS0078 24x4 support, 4/8 bit */
PCF2113_3V3 = 6 | (LCD_C_I2C | LCD_C_BST), /**< PCF2113 3V3 with Booster, 4/8 bit, I2C */
PCF2116_3V3 = 7 | (LCD_C_I2C | LCD_C_BST), /**< PCF2116 3V3 with Booster, 4/8 bit, I2C */
// PCF2116_5V = 8 | (LCD_C_I2C), /**< PCF2116 5V no Booster, 4/8 bit, I2C */
AIP31068 = 9 | (LCD_C_SPI3_9 | LCD_C_I2C | LCD_C_BST) /**< AIP31068 I2C, SPI3 */
};
/** LCD Cursor control */
enum LCDCursor {
CurOff_BlkOff = 0x00, /**< Cursor Off, Blinking Char Off */
CurOn_BlkOff = 0x02, /**< Cursor On, Blinking Char Off */
CurOff_BlkOn = 0x01, /**< Cursor Off, Blinking Char On */
CurOn_BlkOn = 0x03 /**< Cursor On, Blinking Char On */
};
/** LCD Display control */
enum LCDMode {
DispOff = 0x00, /**< Display Off */
DispOn = 0x04 /**< Display On */
};
/** LCD Backlight control */
enum LCDBacklight {
LightOff, /**< Backlight Off */
LightOn /**< Backlight On */
};
#if DOXYGEN_ONLY
/** Write a character to the LCD
*
* @param c The character to write to the display
*/
int putc(int c);
/** Write a formated string to the LCD
*
* @param format A printf-style format string, followed by the
* variables to use in formating the string.
*/
int printf(const char* format, ...);
#endif
/** 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 locate(int column, int row);
/** 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 getAddress(int column, int row);
/** 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 setAddress(int column, int row);
/** Clear the screen and locate to 0,0
*/
void cls();
/** Return the number of rows
*
* @param return The number of rows
*/
int rows();
/** Return the number of columns
*
* @param return The number of columns
*/
int columns();
/** Set the Cursormode
*
* @param cursorMode The Cursor mode (CurOff_BlkOff, CurOn_BlkOff, CurOff_BlkOn, CurOn_BlkOn)
*/
void setCursor(LCDCursor cursorMode);
/** Set the Displaymode
*
* @param displayMode The Display mode (DispOff, DispOn)
*/
void setMode(LCDMode displayMode);
/** Set the Backlight mode
*
* @param backlightMode The Backlight mode (LightOff, LightOn)
*/
void setBacklight(LCDBacklight backlightMode);
/** 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 setUDC(unsigned char c, char *udc_data);
//test
// void _initCtrl();
protected:
/** LCD controller select, mainly used for LCD40x4
*/
enum _LCDCtrl_Idx {
_LCDCtrl_0, /*< Primary */
_LCDCtrl_1, /*< Secondary */
};
/** Create a TextLCD_Base interface
* @brief Base class, can not be instantiated
*
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param ctrl LCD controller (default = HD44780)
*/
TextLCD_Base(LCDType type = LCD16x2, LCDCtrl ctrl = HD44780);
// Stream implementation functions
virtual int _putc(int value);
virtual int _getc();
/** Low level method for LCD controller
*/
void _init();
/** Low level initialisation method for LCD controller
*/
void _initCtrl();
/** Low level character address set method
*/
int _address(int column, int row);
/** Low level cursor enable or disable method
*/
void _setCursor(LCDCursor show);
/** Low level method to store user defined characters for current controller
*/
void _setUDC(unsigned char c, char *udc_data);
/** Low level method to restore the cursortype and display mode for current controller
*/
void _setCursorAndDisplayMode(LCDMode displayMode, LCDCursor cursorType);
/** Low level nibble write operation to LCD controller (serial or parallel)
*/
void _writeNibble(int value);
/** Low level command byte write operation to LCD controller.
* Methods resets the RS bit and provides the required timing for the command.
*/
void _writeCommand(int command);
/** Low level data byte write operation to LCD controller (serial or parallel).
* Methods sets the RS bit and provides the required timing for the data.
*/
void _writeData(int data);
/** Pure Virtual Low level writes to LCD Bus (serial or parallel)
* Set the Enable pin.
*/
virtual void _setEnable(bool value) = 0;
/** Pure Virtual Low level writes to LCD Bus (serial or parallel)
* Set the RS pin ( 0 = Command, 1 = Data).
*/
virtual void _setRS(bool value) = 0;
/** Pure Virtual Low level writes to LCD Bus (serial or parallel)
* Set the BL pin (0 = Backlight Off, 1 = Backlight On).
*/
virtual void _setBL(bool value) = 0;
/** Pure Virtual Low level writes to LCD Bus (serial or parallel)
* Set the databus value (4 bit).
*/
virtual void _setData(int value) = 0;
/** Low level byte write operation to LCD controller (serial or parallel)
* Depending on the RS pin this byte will be interpreted as data or command
*/
virtual void _writeByte(int value);
//Display type
LCDType _type;
int _nr_cols;
int _nr_rows;
int _addr_mode;
//Display mode
LCDMode _currentMode;
//Controller type
LCDCtrl _ctrl;
//Controller select, mainly used for LCD40x4
_LCDCtrl_Idx _ctrl_idx;
// Cursor
int _column;
int _row;
LCDCursor _currentCursor;
};
//--------- End TextLCD_Base -----------
//--------- Start TextLCD Bus -----------
/** Create a TextLCD interface for using regular mbed pins
*
*/
class TextLCD : public TextLCD_Base {
public:
/** 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(PinName rs, PinName e, PinName d4, PinName d5, PinName d6, PinName d7, LCDType type = LCD16x2, PinName bl = NC, PinName e2 = NC, LCDCtrl ctrl = HD44780);
/** Destruct a TextLCD interface for using regular mbed pins
*
* @param none
* @return none
*/
virtual ~TextLCD();
private:
/** Implementation of pure Virtual Low level writes to LCD Bus (parallel)
* Set the Enable pin.
*/
virtual void _setEnable(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (parallel)
* Set the RS pin ( 0 = Command, 1 = Data).
*/
virtual void _setRS(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (parallel)
* Set the BL pin (0 = Backlight Off, 1 = Backlight On).
*/
virtual void _setBL(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (parallel)
* Set the databus value (4 bit).
*/
virtual void _setData(int value);
/** Regular mbed pins bus
*/
DigitalOut _rs, _e;
BusOut _d;
/** Optional Hardware pins for the Backlight and LCD40x4 device
* Default PinName value is NC, must be used as pointer to avoid issues with mbed lib and DigitalOut pins
*/
DigitalOut *_bl, *_e2;
};
//----------- End TextLCD ---------------
//--------- Start TextLCD_I2C -----------
/** Create a TextLCD interface using an I2C PCF8574 (or PCF8574A) or MCP23008 portexpander
*
*/
class TextLCD_I2C : public TextLCD_Base {
public:
/** Create a TextLCD interface using an I2C PCF8574 (or PCF8574A) or MCP23008 portexpander
*
* @param i2c I2C Bus
* @param deviceAddress I2C slave address (PCF8574 or PCF8574A, default = PCF8574_SA0 = 0x40)
* @param type Sets the panel size/addressing mode (default = LCD16x2)
* @param ctrl LCD controller (default = HD44780)
*/
TextLCD_I2C(I2C *i2c, char deviceAddress = PCF8574_SA0, LCDType type = LCD16x2, LCDCtrl ctrl = HD44780);
private:
/** Implementation of pure Virtual Low level writes to LCD Bus (serial expander)
* Set the Enable pin.
*/
virtual void _setEnable(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial expander)
* Set the RS pin ( 0 = Command, 1 = Data).
*/
virtual void _setRS(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial expander)
* Set the BL pin (0 = Backlight Off, 1 = Backlight On).
*/
virtual void _setBL(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial expander)
* Set the databus value (4 bit).
*/
virtual void _setData(int value);
/** Write data to MCP23008 I2C portexpander
* @param reg register to write
* @param value data to write
* @return none
*
*/
void _write_register (int reg, int value);
//I2C bus
I2C *_i2c;
char _slaveAddress;
// Internal bus mirror value for serial bus only
char _lcd_bus;
};
//---------- End TextLCD_I2C ------------
//--------- Start TextLCD_SPI -----------
/** Create a TextLCD interface using an SPI 74595 portexpander
*
*/
class TextLCD_SPI : public TextLCD_Base {
public:
/** 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(SPI *spi, PinName cs, LCDType type = LCD16x2, LCDCtrl ctrl = HD44780);
private:
/** Implementation of pure Virtual Low level writes to LCD Bus (serial expander)
* Set the Enable pin.
*/
virtual void _setEnable(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial expander)
* Set the RS pin ( 0 = Command, 1 = Data).
*/
virtual void _setRS(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial expander)
* Set the BL pin (0 = Backlight Off, 1 = Backlight On).
*/
virtual void _setBL(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial expander)
* Set the databus value (4 bit).
*/
virtual void _setData(int value);
/** Implementation of Low level writes to LCD Bus (serial expander)
* Set the CS pin (0 = select, 1 = deselect).
*/
virtual void _setCS(bool value);
///** Low level writes to LCD serial bus only (serial expander)
// */
// void _writeBus();
// SPI bus
SPI *_spi;
DigitalOut _cs;
// Internal bus mirror value for serial bus only
char _lcd_bus;
};
//---------- End TextLCD_SPI ------------
//--------- Start TextLCD_SPI_N -----------
/** Create a TextLCD interface using a controller with native SPI4 interface
*
*/
class TextLCD_SPI_N : public TextLCD_Base {
public:
/** Create a TextLCD interface using a controller with 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(SPI *spi, PinName cs, PinName rs, LCDType type = LCD16x2, PinName bl = NC, LCDCtrl ctrl = ST7032_3V3);
virtual ~TextLCD_SPI_N(void);
private:
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the Enable pin.
*/
virtual void _setEnable(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the RS pin ( 0 = Command, 1 = Data).
*/
virtual void _setRS(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the BL pin (0 = Backlight Off, 1 = Backlight On).
*/
virtual void _setBL(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the databus value (4 bit).
*/
virtual void _setData(int value);
/** Low level writes to LCD serial bus only (serial native)
*/
virtual void _writeByte(int value);
// SPI bus
SPI *_spi;
DigitalOut _cs;
DigitalOut _rs;
//Backlight
DigitalOut *_bl;
};
//---------- End TextLCD_SPI_N ------------
#if(0)
//Code checked out on logic analyser. Not yet tested on hardware..
//------- Start TextLCD_SPI_N_3_9 ---------
/** Create a TextLCD interface using a controller with native SPI3 9 bits interface
* Note: current mbed libs only support SPI 9 bit mode for NXP platforms
*
*/
class TextLCD_SPI_N_3_9 : public TextLCD_Base {
public:
/** Create a TextLCD interface using a controller with native SPI3 9 bits interface
* Note: current mbed libs only support SPI 9 bit mode for NXP platforms
*
* @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(SPI *spi, PinName cs, LCDType type = LCD16x2, PinName bl = NC, LCDCtrl ctrl = AIP31068);
virtual ~TextLCD_SPI_N_3_9(void);
private:
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the Enable pin.
*/
virtual void _setEnable(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the RS pin ( 0 = Command, 1 = Data).
*/
virtual void _setRS(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the BL pin (0 = Backlight Off, 1 = Backlight On).
*/
virtual void _setBL(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the databus value (4 bit).
*/
virtual void _setData(int value);
/** Low level writes to LCD serial bus only (serial native)
*/
virtual void _writeByte(int value);
// SPI bus
SPI *_spi;
DigitalOut _cs;
// controlbyte to select between data and command. Internal value for serial bus only
char _controlbyte;
//Backlight
DigitalOut *_bl;
};
//-------- End TextLCD_SPI_N_3_9 ----------
#endif
#if(0)
//Code checked out on logic analyser. Not yet tested on hardware..
//------- Start TextLCD_SPI_N_3_10 ---------
/** Create a TextLCD interface using a controller with native SPI3 10 bits interface
* Note: current mbed libs only support SPI 10 bit mode for NXP platforms
*
*/
class TextLCD_SPI_N_3_10 : public TextLCD_Base {
public:
/** Create a TextLCD interface using a controller with native SPI3 10 bits interface
* Note: current mbed libs only support SPI 10 bit mode for NXP platforms
*
* @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(SPI *spi, PinName cs, LCDType type = LCD16x2, PinName bl = NC, LCDCtrl ctrl = AIP31068);
virtual ~TextLCD_SPI_N_3_10(void);
private:
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the Enable pin.
*/
virtual void _setEnable(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the RS pin ( 0 = Command, 1 = Data).
*/
virtual void _setRS(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the BL pin (0 = Backlight Off, 1 = Backlight On).
*/
virtual void _setBL(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the databus value (4 bit).
*/
virtual void _setData(int value);
/** Low level writes to LCD serial bus only (serial native)
*/
virtual void _writeByte(int value);
// SPI bus
SPI *_spi;
DigitalOut _cs;
// controlbyte to select between data and command. Internal value for serial bus only
char _controlbyte;
//Backlight
DigitalOut *_bl;
};
//-------- End TextLCD_SPI_N_3_10 ----------
#endif
//--------- Start TextLCD_I2C_N -----------
/** Create a TextLCD interface using a controller with native I2C interface
*
*/
class TextLCD_I2C_N : public TextLCD_Base {
public:
/** Create a TextLCD interface using a controller with native I2C interface
*
* @param i2c I2C Bus
* @param deviceAddress I2C slave address (default = ST7032_SA = 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(I2C *i2c, char deviceAddress = ST7032_SA, LCDType type = LCD16x2, PinName bl = NC, LCDCtrl ctrl = ST7032_3V3);
virtual ~TextLCD_I2C_N(void);
private:
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the Enable pin.
*/
virtual void _setEnable(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the RS pin ( 0 = Command, 1 = Data).
*/
virtual void _setRS(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the BL pin (0 = Backlight Off, 1 = Backlight On).
*/
virtual void _setBL(bool value);
/** Implementation of pure Virtual Low level writes to LCD Bus (serial native)
* Set the databus value (4 bit).
*/
virtual void _setData(int value);
/** Low level writes to LCD serial bus only (serial native)
*/
virtual void _writeByte(int value);
//I2C bus
I2C *_i2c;
char _slaveAddress;
// controlbyte to select between data and command. Internal value for serial bus only
char _controlbyte;
//Backlight
DigitalOut *_bl;
};
//---------- End TextLCD_I2C_N ------------
#endif