Traditional LCD library that has been modified to be used with a 16x4 LCD display along with using the 16bit Timer wait function used in the 'LCD_Wait' library to measure Pulsewidth
Dependents: PulseWidthCapture_Program
TextLCD_16x4.h
- Committer:
- Ellor1
- Date:
- 2014-12-11
- Revision:
- 1:6ad3406d5912
- Parent:
- 0:473988c75437
File content as of revision 1:6ad3406d5912:
/*********************************************************************************************************************** This library is based upon the original TextLCD library. This library has been modified so it can be used with a 16x4 LCD The traditional 'wait' function has been chnaged to use 16 bit Timer 1 rather than 32 bit Timer 0 which is what is set up usually in the mbed library. The reason for this change is so that the new wait function and this library could be used alongside a PulseWidthCapture program which needs to use the 32 bit timer. This program requires Library 'LCD_Wait' to work Callum Ellor **************************************************************************************************************************/ #ifndef MBED_TEXTLCD_H #define MBED_TEXTLCD_H #include "mbed.h" /** A TextLCD interface for driving 4-bit HD44780-based LCDs * * Currently supports 16x2, 20x2 and 20x4 panels * * @code * #include "mbed.h" * #include "TextLCD.h" * * TextLCD lcd(p10, p12, p15, p16, p29, p30); // rs, e, d4-d7 * * int main() { * lcd.printf("Hello World!\n"); * } * @endcode */ class TextLCD : public Stream { public: /** LCD panel format */ enum LCDType { LCD16x2 /**< 16x2 LCD panel (default) */ , LCD16x2B /**< 16x2 LCD panel alternate addressing */ , LCD20x2 /**< 20x2 LCD panel */ , LCD20x4 /**< 20x4 LCD panel */ , LCD16x4 /**< 16x4 LCD panel */ //added to work with 16x4 }; /** Create a TextLCD interface * * @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) */ TextLCD(PinName rs, PinName e, PinName d4, PinName d5, PinName d6, PinName d7, LCDType type = LCD16x2); #if DOXYGEN_ONLY /** Write a character to the LCD * * @param c The character to write to the display */ int putc(int c); /** Write a formated string to the LCD * * @param format A printf-style format string, followed by the * variables to use in formating the string. */ int printf(const char* format, ...); #endif /** Locate 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 locate(int column, int row); /** Clear the screen and locate to 0,0 */ void cls(); int rows(); int columns(); protected: // Stream implementation functions virtual int _putc(int value); virtual int _getc(); int address(int column, int row); void character(int column, int row, int c); void writeByte(int value); void writeCommand(int command); void writeData(int data); int wait_n; DigitalOut _rs, _e; BusOut _d; LCDType _type; int _column; int _row; }; #endif