display funciona!
Dependents: 2018_I2C_LCD_03 TBI_FIAT_FEEDFORWARD Ignition Can_between_NUCLEOS_LCD ... more
Fork of TextLCD by
Diff: TextLCD.cpp
- Revision:
- 22:35742ec80c24
- Parent:
- 21:9eb628d9e164
- Child:
- 23:d47f226efb24
--- a/TextLCD.cpp Tue Apr 01 21:30:25 2014 +0000 +++ b/TextLCD.cpp Wed Apr 02 17:49:55 2014 +0000 @@ -7,7 +7,7 @@ * 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 in Derived Classes to deal with mbed lib change regarding 'NC' defined pins + * 2014, v08: WH, Refactored in Base and Derived Classes to deal with mbed lib change regarding 'NC' defined pins * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal @@ -723,9 +723,11 @@ } +///--------- End TextLCD_Base ----------- -///------------------------------------------------------------------- + +///--------- Start TextLCD Bus ----------- /* Create a TextLCD interface for using regular mbed pins * @@ -741,29 +743,56 @@ PinName d4, PinName d5, PinName d6, PinName d7, LCDType type, PinName bl, PinName e2, LCDCtrl ctrl) : TextLCD_Base(type, ctrl), - _rs(rs), _e(e), _bl(bl), _e2(e2), - _d(d4, d5, d6, d7) { + _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(); } -// Set E pin (or E2 pin) -// Used for mbed pins, I2C bus expander or SPI shiftregister +/** 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) - _e2 = 1; // Set E2 bit - else - _e2 = 0; // Reset E2 bit - } + 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 + } + } } @@ -771,50 +800,66 @@ // Used for mbed pins, I2C bus expander or SPI shiftregister void TextLCD::_setRS(bool value) { - if (value) + if (value) { _rs = 1; // Set RS bit - else + } + else { _rs = 0; // Reset RS bit + } } -// Set BL pin -// Used for mbed pins, I2C bus expander or SPI shiftregister +/** 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) - _bl = 1; // Set BL bit - else - _bl = 0; // Reset BL bit + 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 } - +/** Destruct a TextLCD interface for using regular mbed pins + * + * @param none + * @return none + */ +TextLCD::~TextLCD() { + if (_bl != NULL) {delete _bl;} // BL pin + if (_e2 != NULL) {delete _e2;} // E2 pin +} - -///---------------------------------------------------------------------------------------- + +///----------- End TextLCD --------------- -/* Create a TextLCD interface using an I2C PC8574 portexpander - * - * @param i2c I2C Bus - * @param deviceAddress I2C slave address (PCF8574) - * @param type Sets the panel size/addressing mode (default = LCD16x2) - * @param ctrl LCD controller (default = HD44780) - */ +///--------- Start TextLCD_I2C ----------- + +/** Create a TextLCD interface using an I2C PC8574 or PCF8574A portexpander + * + * @param i2c I2C Bus + * @param deviceAddress I2C slave address (PCF8574 or PCF8574A, 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; + _slaveAddress = deviceAddress & 0xFE; // Init the portexpander bus _lcd_bus = D_LCD_BUS_DEF; @@ -830,21 +875,21 @@ // 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(_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 + } - // write the new data to the I2C portexpander - _i2c->write(_slaveAddress, &_lcd_bus, 1); + // write the new data to the I2C portexpander + _i2c->write(_slaveAddress, &_lcd_bus, 1); } @@ -852,13 +897,13 @@ // 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 (value) + _lcd_bus |= D_LCD_RS; // Set RS bit + else + _lcd_bus &= ~D_LCD_RS; // Reset RS bit - // write the new data to the I2C portexpander - _i2c->write(_slaveAddress, &_lcd_bus, 1); + // write the new data to the I2C portexpander + _i2c->write(_slaveAddress, &_lcd_bus, 1); } @@ -882,55 +927,48 @@ // 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 + 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 & 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 & 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 (data & 0x08) + _lcd_bus |= D_LCD_D7; // Set Databit + else + _lcd_bus &= ~D_LCD_D7; // Reset Databit - // write the new data to the I2C portexpander - _i2c->write(_slaveAddress, &_lcd_bus, 1); - + // write the new data to the I2C portexpander + _i2c->write(_slaveAddress, &_lcd_bus, 1); + +} -} +///---------- End TextLCD_I2C ------------ - - -///------------------------------------------------------------------------------------ - - - - - +///--------- Start TextLCD_SPI ----------- -// TextLCD_SPI Implementation - - - /* 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) - */ + /** 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), @@ -959,23 +997,23 @@ // 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 - } + 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); + // write the new data to the SPI portexpander + _setCS(false); + _spi->write(_lcd_bus); + _setCS(true); } @@ -983,10 +1021,12 @@ // Used for mbed pins, I2C bus expander or SPI shiftregister void TextLCD_SPI::_setRS(bool value) { - if (value) + if (value) { _lcd_bus |= D_LCD_RS; // Set RS bit - else + } + else { _lcd_bus &= ~D_LCD_RS; // Reset RS bit + } // write the new data to the SPI portexpander _setCS(false); @@ -999,10 +1039,12 @@ // Used for mbed pins, I2C bus expander or SPI shiftregister void TextLCD_SPI::_setBL(bool value) { - if (value) + if (value) { _lcd_bus |= D_LCD_BL; // Set BL bit - else + } + else { _lcd_bus &= ~D_LCD_BL; // Reset BL bit + } // write the new data to the SPI portexpander _setCS(false); @@ -1017,32 +1059,34 @@ // Used for mbed pins, I2C bus expander or SPI shiftregister void TextLCD_SPI::_setData(int value) { int data; - - 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 + // 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 & 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 (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); + // write the new data to the SPI portexpander + _setCS(false); + _spi->write(_lcd_bus); + _setCS(true); } @@ -1054,18 +1098,17 @@ if (value) { _cs = 1; // Set CS pin } - else + else { _cs = 0; // Reset CS pin - + } } +///---------- End TextLCD_SPI ------------ + + - - - -