16*2Lcd Display
Diff: TextLCD.h
- Revision:
- 22:35742ec80c24
- Parent:
- 21:9eb628d9e164
- Child:
- 23:d47f226efb24
diff -r 9eb628d9e164 -r 35742ec80c24 TextLCD.h --- a/TextLCD.h Tue Apr 01 21:30:25 2014 +0000 +++ b/TextLCD.h Wed Apr 02 17:49:55 2014 +0000 @@ -37,7 +37,7 @@ /** A TextLCD interface for driving 4-bit HD44780-based LCDs * * Currently supports 8x1, 8x2, 12x4, 16x1, 16x2, 16x4, 20x2, 20x4, 24x2, 24x4, 40x2 and 40x4 panels - * Interface options include direct mbed pins, I2C portexpander (PCF8474) or SPI bus shiftregister (74595) + * Interface options include direct mbed pins, I2C portexpander (PCF8474, PCF8574A) or SPI bus shiftregister (74595) * Supports some controllers that provide internal DC/DC converters for VLCD or VLED. * * @code @@ -50,9 +50,9 @@ * // 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, CS pin, LCD Type - * //TextLCD_I2C lcd(&i2c_lcd, 0x42, TextLCD::LCD20x4); // I2C bus, PCF8574 Slaveaddress, LCD Type + * //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, 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 * * int main() { @@ -161,7 +161,8 @@ /** A TextLCD interface for driving 4-bit HD44780-based LCDs * - * Currently supports 8x1, 8x2, 12x2, 12x4, 16x1, 16x2, 16x4, 20x2, 20x4, 24x2, 24x4, 40x2 and 40x4 panels + * @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 SPI bus shiftregister (74595) * */ class TextLCD_Base : public Stream { @@ -194,8 +195,6 @@ }; - - /** LCD Cursor control */ enum LCDCursor { CurOff_BlkOff = 0x00, /**< Cursor Off, Blinking Char Off */ @@ -258,7 +257,8 @@ void setAddress(int column, int row); - /** Clear the screen and locate to 0,0 */ + /** Clear the screen and locate to 0,0 + */ void cls(); /** Return the number of rows @@ -365,6 +365,11 @@ LCDCursor _currentCursor; }; +///--------- End TextLCD_Base ----------- + + + +///--------- Start TextLCD Bus ----------- /** Create a TextLCD interface for using regular mbed pins * @@ -383,6 +388,14 @@ */ 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: //Low level writes to LCD Bus (serial or parallel) virtual void _setEnable(bool value); @@ -390,26 +403,37 @@ virtual void _setBL(bool value); virtual void _setData(int value); -// Regular mbed pins bus - DigitalOut _rs, _e, _bl, _e2; - BusOut _d; +/** 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 --------------- -/** Create a TextLCD interface using an I2C PC8574 portexpander +///--------- Start TextLCD_I2C ----------- + + +/** Create a TextLCD interface using an I2C PC8574 or PCF8574A portexpander * */ class TextLCD_I2C : public TextLCD_Base { public: - /** Create a TextLCD interface using an I2C PC8574 portexpander + /** Create a TextLCD interface using an I2C PC8574 or PCF8574A portexpander * * @param i2c I2C Bus - * @param deviceAddress I2C slave address (PCF8574) + * @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(I2C *i2c, char deviceAddress, LCDType type = LCD16x2, LCDCtrl ctrl = HD44780); + TextLCD_I2C(I2C *i2c, char deviceAddress = 0x40, LCDType type = LCD16x2, LCDCtrl ctrl = HD44780); private: //Low level writes to LCD Bus (serial or parallel) @@ -428,6 +452,12 @@ }; +///---------- End TextLCD_I2C ------------ + + + +///--------- Start TextLCD_SPI ----------- + /** Create a TextLCD interface using an SPI 74595 portexpander * @@ -464,5 +494,6 @@ }; +///---------- End TextLCD_SPI ------------ #endif