Wim Huiskamp
Updated for more display types. Fixed memoryaddress confusion in address() method. Added new getAddress() method. Added support for UDCs, Backlight control and other features such as control through I2C and SPI port expanders and controllers with native I2C and SPI interfaces. Refactored to fix issue with pins that are default declared as NC.
Dependents: GPSDevice TestTextLCD SD to Flash Data Transfer DrumMachine ... more
Fork of
TextLCD
by 
Simon Ford
Example
Hello World! for the TextLCD
#include "mbed.h"
#include "TextLCD.h"
// Host PC Communication channels
Serial pc(USBTX, USBRX); // tx, rx
// 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() {
pc.printf("LCD Test. Columns=%d, Rows=%d\n\r", lcd.columns(), lcd.rows());
for (int row=0; row<lcd.rows(); row++) {
int col=0;
pc.printf("MemAddr(Col=%d, Row=%d)=0x%02X\n\r", col, row, lcd.getAddress(col, row));
// lcd.putc('-');
lcd.putc('0' + row);
for (col=1; col<lcd.columns()-1; col++) {
lcd.putc('*');
}
pc.printf("MemAddr(Col=%d, Row=%d)=0x%02X\n\r", col, row, lcd.getAddress(col, row));
lcd.putc('+');
}
// Show cursor as blinking character
lcd.setCursor(TextLCD::CurOff_BlkOn);
// Set and show user defined characters. A maximum of 8 UDCs are supported by the HD44780.
// They are defined by a 5x7 bitpattern.
lcd.setUDC(0, (char *) udc_0); // Show |>
lcd.putc(0);
lcd.setUDC(1, (char *) udc_1); // Show <|
lcd.putc(1);
}
Handbook page
More info is here
TextLCD.cpp
- Committer:
- wim
- Date:
- 2014-06-28
- Revision:
- 30:033048611c01
- Parent:
- 29:a3663151aa65
- Child:
- 31:ef31cd8a00d1
File content as of revision 30:033048611c01:
/* 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 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.
*/
#include "TextLCD.h"
#include "mbed.h"
//For Testing only
//DigitalOut led1(LED1);
//DigitalOut led2(LED2);
// led2=!led2;
/** Some sample User Defined Chars 5x7 dots */
const char udc_ae[] = {0x00, 0x00, 0x1B, 0x05, 0x1F, 0x14, 0x1F, 0x00}; //æ
const char udc_0e[] = {0x00, 0x00, 0x0E, 0x13, 0x15, 0x19, 0x0E, 0x00}; //ø
const char udc_ao[] = {0x0E, 0x0A, 0x0E, 0x01, 0x0F, 0x11, 0x0F, 0x00}; //å
const char udc_AE[] = {0x0F, 0x14, 0x14, 0x1F, 0x14, 0x14, 0x17, 0x00}; //Æ
const char udc_0E[] = {0x0E, 0x13, 0x15, 0x15, 0x15, 0x19, 0x0E, 0x00}; //Ø
const char udc_Ao[] = {0x0E, 0x0A, 0x0E, 0x11, 0x1F, 0x11, 0x11, 0x00}; //Å
const char udc_PO[] = {0x04, 0x0A, 0x0A, 0x1F, 0x1B, 0x1B, 0x1F, 0x00}; //Padlock Open
const char udc_PC[] = {0x1C, 0x10, 0x08, 0x1F, 0x1B, 0x1B, 0x1F, 0x00}; //Padlock Closed
const char udc_0[] = {0x18, 0x14, 0x12, 0x11, 0x12, 0x14, 0x18, 0x00}; // |>
const char udc_1[] = {0x03, 0x05, 0x09, 0x11, 0x09, 0x05, 0x03, 0x00}; // <|
const char udc_2[] = {0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00}; // |
const char udc_3[] = {0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x00}; // ||
const char udc_4[] = {0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x00}; // |||
const char udc_5[] = {0x00, 0x1f, 0x00, 0x1f, 0x00, 0x1f, 0x00, 0x00}; // =
const char udc_6[] = {0x15, 0x0a, 0x15, 0x0a, 0x15, 0x0a, 0x15, 0x00}; // checkerboard
const char udc_7[] = {0x10, 0x08, 0x04, 0x02, 0x01, 0x00, 0x10, 0x00}; // \
const char udc_degr[] = {0x06, 0x09, 0x09, 0x06, 0x00, 0x00, 0x00, 0x00}; // Degree symbol
const char udc_TM_T[] = {0x1F, 0x04, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00}; // Trademark T
const char udc_TM_M[] = {0x11, 0x1B, 0x15, 0x11, 0x00, 0x00, 0x00, 0x00}; // Trademark M
//const char udc_Bat_Hi[] = {0x0E, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x00}; // Battery Full
//const char udc_Bat_Ha[] = {0x0E, 0x11, 0x13, 0x17, 0x1F, 0x1F, 0x1F, 0x00}; // Battery Half
//const char udc_Bat_Lo[] = {0x0E, 0x11, 0x11, 0x11, 0x11, 0x11, 0x1F, 0x00}; // Battery Low
const char udc_Bat_Hi[] = {0x0E, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x00}; // Battery Full
const char udc_Bat_Ha[] = {0x0E, 0x11, 0x11, 0x1F, 0x1F, 0x1F, 0x1F, 0x00}; // Battery Half
const char udc_Bat_Lo[] = {0x0E, 0x11, 0x11, 0x11, 0x11, 0x1F, 0x1F, 0x00}; // Battery Low
const char udc_AC[] = {0x0A, 0x0A, 0x1F, 0x11, 0x0E, 0x04, 0x04, 0x00}; // AC Power
//const char udc_smiley[] = {0x00, 0x0A, 0x00, 0x04, 0x11, 0x0E, 0x00, 0x00}; // Smiley
//const char udc_droopy[] = {0x00, 0x0A, 0x00, 0x04, 0x00, 0x0E, 0x11, 0x00}; // Droopey
//const char udc_note[] = {0x01, 0x03, 0x05, 0x09, 0x0B, 0x1B, 0x18, 0x00}; // Note
//const char udc_bar_1[] = {0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x00}; // Bar 1
//const char udc_bar_2[] = {0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00}; // Bar 11
//const char udc_bar_3[] = {0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x1C, 0x00}; // Bar 111
//const char udc_bar_4[] = {0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x17, 0x00}; // Bar 1111
//const char udc_bar_5[] = {0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x00}; // Bar 11111
//const char udc_ch_1[] = {0x1f, 0x00, 0x1f, 0x00, 0x1f, 0x00, 0x1f, 0x00}; // Hor bars 4
//const char udc_ch_2[] = {0x00, 0x1f, 0x00, 0x1f, 0x00, 0x1f, 0x00, 0x1f}; // Hor bars 4 (inverted)
//const char udc_ch_3[] = {0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15, 0x15}; // Ver bars 3
//const char udc_ch_4[] = {0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a}; // Ver bars 3 (inverted)
//const char udc_ch_yr[] = {0x08, 0x0f, 0x12, 0x0f, 0x0a, 0x1f, 0x02, 0x02}; // Year (kana)
//const char udc_ch_mo[] = {0x0f, 0x09, 0x0f, 0x09, 0x0f, 0x09, 0x09, 0x13}; // Month (kana)
//const char udc_ch_dy[] = {0x1f, 0x11, 0x11, 0x1f, 0x11, 0x11, 0x11, 0x1F}; // Day (kana)
//const char udc_ch_mi[] = {0x0C, 0x0a, 0x11, 0x1f, 0x09, 0x09, 0x09, 0x13}; // minute (kana)
/** 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;
}
/** Init the LCD Controller(s)
* Clear display
*/
void TextLCD_Base::_init() {
// Select and configure second LCD controller when needed
if(_type==LCD40x4) {
_ctrl_idx=_LCDCtrl_1; // Select 2nd controller
_initCtrl(); // Init 2nd controller
}
// Select and configure primary LCD controller
_ctrl_idx=_LCDCtrl_0; // Select primary controller
_initCtrl(); // Init primary controller
// Reset Cursor location
_row=0;
_column=0;
}
/** Init the LCD controller
* 4-bit mode, number of lines, fonttype, no cursor etc
*
* Note: some configurations are commented out because they have not yet been tested due to lack of hardware
*/
void TextLCD_Base::_initCtrl() {
this->_setRS(false); // command mode
wait_ms(20); // Wait 20ms to ensure powered up
// send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
for (int i=0; i<3; i++) {
_writeNibble(0x3);
wait_ms(15); // This command takes 1.64ms, so wait for it
}
_writeNibble(0x2); // 4-bit mode
wait_us(40); // most instructions take 40us
// Display is now in 4-bit mode
// Note: 4 bit mode is ignored for native SPI and I2C devices
// Device specific initialisations: DC/DC converter to generate VLCD or VLED, number of lines etc
switch (_ctrl) {
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:
_writeCommand(0x20); // Function set 001 DL N RE(0) DH REV
// DL=0 (4 bits bus)
// N=0 (1 line)
// RE=0 (Dis. Extended Regs, special mode for KS0078)
// DH=0 (Disp shift=disable, special mode for KS0078)
// REV=0 (Reverse=Normal, special mode for KS0078)
break;
// case LCD12x3D: // Special mode for KS0078
// case LCD12x3D1: // Special mode for KS0078
// case LCD12x4D: // Special mode for KS0078
// case LCD16x3D:
// case LCD16x4D:
// case LCD24x3D: // Special mode for KS0078
// case LCD24x3D1: // Special mode for KS0078
case LCD24x4D: // Special mode for KS0078
_writeCommand(0x2A); // Function set 001 DL N RE(0) DH REV
// DL=0 (4 bits bus)
// N=1 (Dont care for KS0078 in 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)
_writeCommand(0x2E); // Function set 001 DL N RE(1) BE 0
// DL=0 (4 bits bus)
// N=1 (Dont care for KS0078 in 4-line mode)
// RE=1 (Ena Extended Regs, special mode for KS0078)
// BE=1 (Blink Enable, CG/SEG RAM, special mode for KS0078)
// X=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(0) DH REV
// DL=0 (4 bits bus)
// N=1 (Dont care for KS0078 in 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)
break;
default:
// All other LCD types are initialised as 2 Line displays (including LCD16x1C and LCD40x4)
_writeCommand(0x28); // Function set 001 DL N RE(0) DH REV
// DL=0 (4 bits bus)
// Note: 4 bit mode is ignored for native SPI and I2C devices
// N=1 (2 lines)
// RE=0 (Dis. Extended Regs, special mode for KS0078)
// DH=0 (Disp shift=disable, special mode for KS0078)
// REV=0 (Reverse=Normal, special mode for KS0078)
break;
} // switch type
break; // case KS0078 Controller
case ST7032_3V3:
// ST7032 controller: Initialise Voltage booster for VLCD. VDD=3V3
// 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:
_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(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(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;
case LCD12x3D: // Special mode for PCF2116
case LCD12x3D1: // Special mode for PCF2116
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
_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(0x6C); //Follower control
wait_ms(10); // Wait 10ms to ensure powered up
_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
// 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:
_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(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(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;
case LCD12x3D: // Special mode for PCF2116
case LCD12x3D1: // Special mode for PCF2116
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
_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(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
case ST7036:
// ST7036 controller: Initialise Voltage booster for VLCD. VDD=5V
// Note: supports 1,2 or 3 lines
// 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:
_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
case LCD12x3D: // Special mode for PCF2116
case LCD12x3D1: // Special mode for PCF2116
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)
_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 PCF2113_3V3:
// PCF2113 controller: Initialise Voltage booster for VLCD. VDD=3V3
// 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 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, members of the PCF21XX family support different numbers of rows/columns. Not all can support 3 or 4 rows.
// Note4: See datasheet, you can also disable VGen by connecting Vo to VDD. VLCD will then be used directly as LCD voltage.
// Note5: PCF2113 is different wrt to VLCD generator !
// Note6: See datasheet, the PCF21XX-C and PCF21XX-K use a non-standard character set. This may result is strange text when not corrected..
// Initialise Display configuration
switch (_type) {
// case LCD12x1:
case LCD24x1:
_writeCommand(0x21); //FUNCTION SET 4 bit, M=0 1-line/24 chars display mode, extended IS
//Note: 4 bit mode is ignored for I2C mode
_writeCommand(0x9F); //Set VLCD A : VGen for Chars and Icons
_writeCommand(0xDF); //Set VLCD B : VGen for Icons Only
_writeCommand(0x20); //FUNCTION SET 4 bit, M=0 1-line/24 chars display mode
// _writeCommand(0x24); //FUNCTION SET 4 bit, M=1 2-line/12 chars display mode, standard IS
wait_ms(10); // Wait 10ms to ensure powered up
break;
//Tested OK for PCF2113
//Note: PCF2113 is different wrt to VLCD generator !
case LCD12x2:
_writeCommand(0x21); //FUNCTION SET 4 bit, M=0 1-line/24 chars display mode, extended IS
//Note: 4 bit mode is ignored for I2C mode
_writeCommand(0x9F); //Set VLCD A : VGen for Chars and Icons
_writeCommand(0xDF); //Set VLCD B : VGen for Icons Only
// _writeCommand(0x20); //FUNCTION SET 4 bit, M=0 1-line/24 chars display mode
_writeCommand(0x24); //FUNCTION SET 4 bit, M=1 2-line/12 chars display mode, standard IS
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 PCF2113_3V3 Controller
case PCF2116_3V3:
// PCF2116 controller: Initialise Voltage booster for VLCD. VDD=3V3
// 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 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, members of the PCF21XX family support different numbers of rows/columns. Not all can support 3 or 4 rows.
// Note4: See datasheet, you can also disable VGen by connecting Vo to VDD. VLCD will then be used directly as LCD voltage.
// Note5: PCF2113 is different wrt to VLCD generator !
// Note6: See datasheet, the PCF21XX-C and PCF21XX-K use a non-standard character set. This may result is strange text when not corrected..
// Initialise Display configuration
switch (_type) {
// case LCD12x1:
// case LCD12x2:
case LCD24x1:
_writeCommand(0x22); //FUNCTION SET 4 bit, N=0/M=0 1-line/24 chars display mode, G=1 VGen on
//Note: 4 bit mode is ignored for I2C mode
wait_ms(10); // Wait 10ms to ensure powered up
break;
case LCD12x3D:
case LCD12x3D1:
case LCD12x4D:
_writeCommand(0x2E); //FUNCTION SET 4 bit, N=1/M=1 4-line/12 chars display mode, G=1 VGen on
//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 4 bit, N=1/M=0 2-line/24 chars display mode, G=1 VGen on
//Note: 4 bit mode is ignored for I2C mode
wait_ms(10); // Wait 10ms to ensure powered up
default:
error("Error: LCD Controller type does not support this Display type\n\r");
break;
} // switch type
break; // case PCF2116_3V3 Controller
// case PCF21XX_5V:
// PCF21XX controller: No Voltage generator for VLCD. VDD=5V
//@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); // DC/DC off
//wait_ms(10); // Wait 10ms to ensure powered down
_writeCommand(0x17); // 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 PCF2116
case LCD12x3D1: // Special mode for PCF2116
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)
_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 WS0100 Controller
default:
// Devices fully compatible to HD44780 that do not use any DC/DC Voltage converters but external VLCD
// 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:
_writeCommand(0x20); // 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 PCF2116
// case LCD12x3D1: // Special mode for PCF2116
// case LCD12x4D: // Special mode for PCF2116
// case LCD24x3D: // 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:
_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 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
_writeData(value);
//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;
}
// Write a nibble using the 4-bit interface
void TextLCD_Base::_writeNibble(int value) {
// Enable is Low
this->_setEnable(true);
this->_setData(value & 0x0F); // Low nibble
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 >> 0); // 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
}
#if (0)
// This is 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) {
switch (_type) {
case LCD20x4:
switch (row) {
case 0:
return 0x80 + column;
case 1:
return 0xc0 + column;
case 2:
return 0x94 + column;
case 3:
return 0xd4 + column;
}
case LCD16x2B:
return 0x80 + (row * 40) + column;
case LCD16x2:
case LCD20x2:
default:
return 0x80 + (row * 0x40) + column;
}
}
#endif
// This replaces the original _address() method.
// 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);
}
#if(0)
// 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
*
* Note: some configurations are commented out because they have not yet been tested due to lack of hardware
*/
int TextLCD_Base::getAddress(int column, int row) {
switch (_type) {
case LCD8x1:
// case LCD12x1:
// case LCD16x1B:
// case LCD20x1:
case LCD24x1:
// case LCD40x1:
return 0x00 + column;
case LCD16x1:
// LCD16x1 is a special layout of LCD8x2
if (column<8)
return 0x00 + column;
else
return 0x40 + (column - 8);
case LCD8x2D:
// LCD8x2B is a special layout of LCD16x1
if (row==0)
return 0x00 + column;
else
return 0x08 + column;
case LCD8x2:
case LCD12x2:
case LCD16x2:
case LCD20x2:
case LCD24x2:
case LCD40x2:
return 0x00 + (row * 0x40) + column;
// 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
case LCD12x3B:
//Display bottom three rows of four
switch (row) {
case 0:
return 0x20 + column;
case 1:
return 0x40 + column;
case 2:
return 0x60 + column;
}
#if(0)
case LCD12x3C:
//Display top three rows of four
switch (row) {
case 0:
return 0x00 + column;
case 1:
return 0x20 + column;
case 2:
return 0x40 + 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;
}
// Special mode for PCF2116 (and KS0078)
case LCD12x4B:
switch (row) {
case 0:
return 0x00 + column;
case 1:
return 0x20 + column;
case 2:
return 0x40 + column;
case 3:
return 0x60 + column;
}
case LCD16x4:
switch (row) {
case 0:
return 0x00 + column;
case 1:
return 0x40 + column;
case 2:
return 0x10 + column;
case 3:
return 0x50 + column;
}
case LCD20x4:
switch (row) {
case 0:
return 0x00 + column;
case 1:
return 0x40 + column;
case 2:
return 0x14 + column;
case 3:
return 0x54 + column;
}
// Special mode for KS0078
case LCD24x4B:
switch (row) {
case 0:
return 0x00 + column;
case 1:
return 0x20 + column;
case 2:
return 0x40 + column;
case 3:
return 0x60 + column;
}
case LCD40x4:
// LCD40x4 is a special case since it has 2 controllers
// Each controller is configured as 40x2
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;
}
// Should never get here.
default:
return 0x00;
}
}
#else
//Test of Addressing Mode encoded in LCDType
// 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
*
* Note: some configurations are commented out because they have not yet been tested due to lack of hardware
*/
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
if (column<8)
return 0x00 + column;
else
return 0x40 + (column - 8);
// 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, KS0078
//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, KS0078
//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;
}
// Should never get here.
default:
return 0x00;
}
}
#endif
/** 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 >= columns()) {
_column = columns() - 1;
} else _column = column;
// Sanity Check row
if (row < 0) {
_row = 0;
}
else if (row >= rows()) {
_row = 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
*
* @param 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;
#if(0)
switch (_type) {
case LCD8x1:
case LCD8x2:
case LCD8x2B:
return 8;
case LCD12x2:
case LCD12x3B:
// case LCD12x3C:
case LCD12x4:
case LCD12x4B:
return 12;
case LCD16x1:
case LCD16x2:
case LCD16x2B:
// case LCD16x3:
case LCD16x4:
return 16;
// case LCD20x1:
case LCD20x2:
case LCD20x4:
return 20;
case LCD24x1:
case LCD24x2:
// case LCD24x3B:
case LCD24x4B:
return 24;
// case LCD40x1:
case LCD40x2:
case LCD40x4:
return 40;
// Should never get here.
default:
return 0;
}
#endif
}
/** Return the number of rows
*
* @param 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;
#if(0)
switch (_type) {
case LCD8x1:
case LCD16x1:
// case LCD20x1:
case LCD24x1:
// case LCD40x1:
return 1;
case LCD8x2:
case LCD8x2B:
case LCD12x2:
case LCD16x2:
case LCD16x2B:
case LCD20x2:
case LCD24x2:
case LCD40x2:
return 2;
case LCD12x3B:
// case LCD12x3C:
// case LCD16x3:
// case LCD24x3B:
return 3;
case LCD12x4:
case LCD12x4B:
case LCD16x4:
case LCD20x4:
case LCD24x4B:
case LCD40x4:
return 4;
// Should never get here.
default:
return 0;
}
#endif
}
/** 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
_writeCommand(0x08 | displayMode | cursorType);
}
/** Set the Backlight mode
*
* @param backlightMode The Backlight mode (LightOff, LightOn)
*/
void TextLCD_Base::setBacklight(LCDBacklight backlightMode) {
if (backlightMode == LightOn) {
this->_setBL(true);
}
else {
this->_setBL(false);
}
}
/** 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
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
*/
void TextLCD_Base::_setUDC(unsigned char c, char *udc_data) {
// Select CG RAM for current LCD controller
_writeCommand(0x40 + ((c & 0x07) << 3)); //Set CG-RAM address,
//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
int addr = getAddress(_column, _row);
_writeCommand(0x80 | addr);
}
//--------- 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();
}
/** 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 -----------
/** 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
_write_register(IODIR, 0x00); // All outputs
_write_register(IPOL, 0x00); // No reverse polarity
_write_register(GPINTEN, 0x00); // No interrupt
_write_register(DEFVAL, 0x00); // Default value to compare against for interrupts
_write_register(INTCON, 0x00); // No interrupt on changes
_write_register(IOCON, 0x00); // Interrupt polarity
_write_register(GPPU, 0x00); // No Pullup
_write_register(INTF, 0x00); //
_write_register(INTCAP, 0x00); //
_write_register(GPIO, 0x00); // Output/Input pins
_write_register(OLAT, 0x00); // Output Latch
// Init the portexpander bus
_lcd_bus = D_LCD_BUS_DEF;
// write the new data to the portexpander
_write_register(GPIO, _lcd_bus);
#else
// PCF8574 of PCF8574A portexpander
// Init the portexpander bus
_lcd_bus = D_LCD_BUS_DEF;
// write the new data to the portexpander
_i2c->write(_slaveAddress, &_lcd_bus, 1);
#endif
_init();
}
// Set E pin (or E2 pin)
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_I2C::_setEnable(bool value) {
if(_ctrl_idx==_LCDCtrl_0) {
if (value) {
_lcd_bus |= D_LCD_E; // Set E bit
}
else {
_lcd_bus &= ~D_LCD_E; // Reset E bit
}
}
else {
if (value) {
_lcd_bus |= D_LCD_E2; // Set E2 bit
}
else {
_lcd_bus &= ~D_LCD_E2; // Reset E2bit
}
}
#if (MCP23008==1)
// MCP23008 portexpander
// write the new data to the portexpander
_write_register(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 |= D_LCD_RS; // Set RS bit
}
else {
_lcd_bus &= ~D_LCD_RS; // Reset RS bit
}
#if (MCP23008==1)
// MCP23008 portexpander
// write the new data to the portexpander
_write_register(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 |= D_LCD_BL; // Set BL bit
}
else {
_lcd_bus &= ~D_LCD_BL; // Reset BL bit
}
#if (MCP23008==1)
// MCP23008 portexpander
// write the new data to the portexpander
_write_register(GPIO, _lcd_bus);
#else
// PCF8574 of PCF8574A portexpander
// write the new data to the I2C portexpander
_i2c->write(_slaveAddress, &_lcd_bus, 1);
#endif
}
// Place the 4bit data on the databus
// Used for mbed pins, I2C bus expander or SPI shifregister
void TextLCD_I2C::_setData(int value) {
int data;
// Set bit by bit to support any mapping of expander portpins to LCD pins
data = value & 0x0F;
if (data & 0x01){
_lcd_bus |= D_LCD_D4; // Set Databit
}
else {
_lcd_bus &= ~D_LCD_D4; // Reset Databit
}
if (data & 0x02){
_lcd_bus |= D_LCD_D5; // Set Databit
}
else {
_lcd_bus &= ~D_LCD_D5; // Reset Databit
}
if (data & 0x04) {
_lcd_bus |= D_LCD_D6; // Set Databit
}
else {
_lcd_bus &= ~D_LCD_D6; // Reset Databit
}
if (data & 0x08) {
_lcd_bus |= D_LCD_D7; // Set Databit
}
else {
_lcd_bus &= ~D_LCD_D7; // Reset Databit
}
#if (MCP23008==1)
// MCP23008 portexpander
// write the new data to the portexpander
_write_register(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
void TextLCD_I2C::_write_register (int reg, int value) {
char data[] = {reg, value};
_i2c->write(_slaveAddress, data, 2);
}
//---------- End TextLCD_I2C ------------
//--------- Start TextLCD_I2C_N ---------
/** 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);
// _i2c->frequency(50000);
// 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
}
#if(0)
//Sanity check
switch (_ctrl) {
case ST7032_3V3:
case ST7032_5V:
case PCF21XX_3V3:
// case PCF21XX_5V:
_init();
break;
default:
error("Error: LCD Controller type does not support native I2C interface\n\r");
}
#endif
//Sanity check
if (_ctrl & LCD_C_I2C) {
_init();
}
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};
_i2c->write(_slaveAddress, data, 2);
}
//-------- End TextLCD_I2C_N ------------
//--------- Start TextLCD_SPI -----------
/** 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) {
// 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);
// Init the portexpander bus
_lcd_bus = D_LCD_BUS_DEF;
// write the new data to the portexpander
_setCS(false);
_spi->write(_lcd_bus);
_setCS(true);
_init();
}
// 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 |= D_LCD_E; // Set E bit
}
else {
_lcd_bus &= ~D_LCD_E; // Reset E bit
}
}
else {
if (value) {
_lcd_bus |= D_LCD_E2; // Set E2 bit
}
else {
_lcd_bus &= ~D_LCD_E2; // Reset E2 bit
}
}
// write the new data to the SPI portexpander
_setCS(false);
_spi->write(_lcd_bus);
_setCS(true);
}
// Set RS pin
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_SPI::_setRS(bool value) {
if (value) {
_lcd_bus |= D_LCD_RS; // Set RS bit
}
else {
_lcd_bus &= ~D_LCD_RS; // Reset RS bit
}
// write the new data to the SPI portexpander
_setCS(false);
_spi->write(_lcd_bus);
_setCS(true);
}
// Set BL pin
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_SPI::_setBL(bool value) {
if (value) {
_lcd_bus |= D_LCD_BL; // Set BL bit
}
else {
_lcd_bus &= ~D_LCD_BL; // Reset BL bit
}
// write the new data to the SPI portexpander
_setCS(false);
_spi->write(_lcd_bus);
_setCS(true);
}
// Place the 4bit data on the databus
// Used for mbed pins, I2C bus expander or SPI shiftregister
void TextLCD_SPI::_setData(int value) {
int data;
// Set bit by bit to support any mapping of expander portpins to LCD pins
data = value & 0x0F;
if (data & 0x01) {
_lcd_bus |= D_LCD_D4; // Set Databit
}
else {
_lcd_bus &= ~D_LCD_D4; // Reset Databit
}
if (data & 0x02) {
_lcd_bus |= D_LCD_D5; // Set Databit
}
else {
_lcd_bus &= ~D_LCD_D5; // Reset Databit
}
if (data & 0x04) {
_lcd_bus |= D_LCD_D6; // Set Databit
}
else {
_lcd_bus &= ~D_LCD_D6; // Reset Databit
}
if (data & 0x08) {
_lcd_bus |= D_LCD_D7; // Set Databit
}
else {
_lcd_bus &= ~D_LCD_D7; // Reset Databit
}
// write the new data to the SPI portexpander
_setCS(false);
_spi->write(_lcd_bus);
_setCS(true);
}
// Set CS line.
// Only used for SPI bus
void TextLCD_SPI::_setCS(bool value) {
if (value) {
_cs = 1; // Set CS pin
}
else {
_cs = 0; // Reset CS pin
}
}
//---------- End TextLCD_SPI ------------
//--------- Start TextLCD_SPI_N ---------
/** 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) {
// 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
}
#if(0)
//Sanity check
switch (_ctrl) {
case ST7032_3V3:
case ST7032_5V:
case WS0010:
_init();
break;
default:
error("Error: LCD Controller type does not support native SPI4 interface\n\r");
}
#endif
//Sanity check
if (_ctrl & LCD_C_SPI4) {
_init();
}
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
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;
}
//-------- 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 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) {
// Setup the spi for 9 bit data, low steady state clock,
// rising edge capture, with a 500KHz or 1MHz clock rate
_spi->format(9,0);
_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_9) {
_init();
}
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;
}
//------- 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 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) {
// 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();
}
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;
}
//------- End TextLCD_SPI_N_3_10 ----------
#endif
HD44780 and compatible Text LCD controllers (4bit, I2C or SPI I/F)