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
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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
Diff: TextLCD.h
- Revision:
- 40:d3496c3ea301
- Parent:
- 39:e9c2319de9c5
- Child:
- 41:111ca62e8a59
--- a/TextLCD.h Tue May 19 18:13:00 2015 +0000 +++ b/TextLCD.h Wed May 20 18:46:51 2015 +0000 @@ -21,7 +21,7 @@ * 2015, v18: WH, Performance improvement I2C portexpander * 2015, v19: WH, Added 10x2D and 10x4D type for SSD1803 * 2015, v20: WH, Fixed occasional Init fail caused by insufficient wait time after ReturnHome command (0x02), Added defines to reduce memory footprint (eg LCD_ICON), - * Fixed and Added more fonttable support for PCF2119K, Added HD66712 controller. + * Fixed and Added more fonttable support for PCF2119R_3V3, Added HD66712 controller. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal