Change config file suit LCD used
Fork of TextLCD by
Diff: TextLCD.cpp
- Revision:
- 20:e0da005a777f
- Parent:
- 19:c747b9e2e7b8
- Child:
- 21:9eb628d9e164
diff -r c747b9e2e7b8 -r e0da005a777f TextLCD.cpp --- a/TextLCD.cpp Fri Apr 19 19:36:37 2013 +0000 +++ b/TextLCD.cpp Mon May 13 19:29:13 2013 +0000 @@ -6,6 +6,7 @@ * 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 * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal @@ -36,16 +37,17 @@ * @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 e2, LCDCtrl ctrl) : _rs(rs), _e(e), _e2(e2), - _d(d4, d5, d6, d7), - _cs(NC), - _type(type), - _ctrl(ctrl) { + LCDType type, PinName bl, PinName e2, LCDCtrl ctrl) : _rs(rs), _e(e), _bl(bl), _e2(e2), + _d(d4, d5, d6, d7), + _cs(NC), + _type(type), + _ctrl(ctrl) { _busType = _PinBus; @@ -61,7 +63,7 @@ * @param ctrl LCD controller (default = HD44780) */ TextLCD::TextLCD(I2C *i2c, char deviceAddress, LCDType type, LCDCtrl ctrl) : - _rs(NC), _e(NC), _e2(NC), + _rs(NC), _e(NC), _bl(NC), _e2(NC), _d(NC), _i2c(i2c), _cs(NC), @@ -90,7 +92,7 @@ * @param ctrl LCD controller (default = HD44780) */ TextLCD::TextLCD(SPI *spi, PinName cs, LCDType type, LCDCtrl ctrl) : - _rs(NC), _e(NC), _e2(NC), + _rs(NC), _e(NC), _bl(NC), _e2(NC), _d(NC), _spi(spi), _cs(cs), @@ -163,7 +165,7 @@ // 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 + wait_ms(15); // This command takes 1.64ms, so wait for it } _writeNibble(0x2); // 4-bit mode wait_us(40); // most instructions take 40us @@ -173,19 +175,19 @@ // Device specific initialisations for DC/DC converter to generate VLCD or VLED switch (_ctrl) { - case ST7063: + case ST7036: // ST7036 controller: Initialise Voltage booster for VLCD. VDD=5V // Note: supports 1,2 or 3 lines _writeByte( 0x29 ); // 4-bit Databus, 2 Lines, Select Instruction table 1 - wait_us(27); // > 26,3ms + wait_ms(30); // > 26,3ms _writeByte( 0x14 ); // Bias: 1/5, 2-Lines LCD - wait_us(30); // > 26,3ms + wait_ms(30); // > 26,3ms _writeByte( 0x55 ); // Icon off, Booster on, Set Contrast C5, C4 - wait_us(30); // > 26,3ms + wait_ms(30); // > 26,3ms _writeByte( 0x6d ); // Voltagefollower On, Ampl ratio Rab2, Rab1, Rab0 wait_ms(200); // > 200ms! _writeByte( 0x78 ); // Set Contrast C3, C2, C1, C0 - wait_us(30); // > 26,3ms + wait_ms(30); // > 26,3ms _writeByte( 0x28 ); // Return to Instruction table 0 wait_ms(50); @@ -472,6 +474,48 @@ } +// Set BL pin +// Used for mbed pins, I2C bus expander or SPI shifregister +void TextLCD::_setBL(bool value) { + + switch(_busType) { + case _PinBus : + if (value) + _bl = 1; // Set BL bit + else + _bl = 0; // Reset BL bit + + break; + + case _I2CBus : + 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 I2C portexpander + _i2c->write(_slaveAddress, &_lcd_bus, 1); + + break; + + case _SPIBus : + 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); + + break; + } + +} + + + // Place the 4bit data on the databus // Used for mbed pins, I2C bus expander or SPI shifregister void TextLCD::_setData(int value) { @@ -931,6 +975,17 @@ _writeCommand(0x08 | displayMode | cursorType); } +// Set the Backlight mode (Off/On) +void TextLCD::setBacklight(TextLCD::LCDBacklight backlightMode) { + + if (backlightMode == LightOn) { + _setBL(true); + } + else { + _setBL(false); + } +} + void TextLCD::setUDC(unsigned char c, char *udc_data) {