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@1:6ad3406d5912, 2014-12-11 (annotated)
- Committer:
- Ellor1
- Date:
- Thu Dec 11 08:59:57 2014 +0000
- Revision:
- 1:6ad3406d5912
- Parent:
- 0:473988c75437
Library to include 16x4 LCD
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Ellor1 | 1:6ad3406d5912 | 1 | /*********************************************************************************************************************** |
Ellor1 | 1:6ad3406d5912 | 2 | This library is based upon the original TextLCD library. This library has been modified so it can be used with a 16x4 LCD |
Ellor1 | 1:6ad3406d5912 | 3 | 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 |
Ellor1 | 1:6ad3406d5912 | 4 | usually in the mbed library. The reason for this change is so that the new wait function and this library could be used |
Ellor1 | 1:6ad3406d5912 | 5 | alongside a PulseWidthCapture program which needs to use the 32 bit timer. |
Ellor1 | 1:6ad3406d5912 | 6 | |
Ellor1 | 1:6ad3406d5912 | 7 | This program requires Library 'LCD_Wait' to work |
Ellor1 | 1:6ad3406d5912 | 8 | Callum Ellor |
Ellor1 | 1:6ad3406d5912 | 9 | **************************************************************************************************************************/ |
Ellor1 | 0:473988c75437 | 10 | |
Ellor1 | 0:473988c75437 | 11 | #ifndef MBED_TEXTLCD_H |
Ellor1 | 0:473988c75437 | 12 | #define MBED_TEXTLCD_H |
Ellor1 | 0:473988c75437 | 13 | |
Ellor1 | 0:473988c75437 | 14 | #include "mbed.h" |
Ellor1 | 0:473988c75437 | 15 | |
Ellor1 | 0:473988c75437 | 16 | /** A TextLCD interface for driving 4-bit HD44780-based LCDs |
Ellor1 | 0:473988c75437 | 17 | * |
Ellor1 | 0:473988c75437 | 18 | * Currently supports 16x2, 20x2 and 20x4 panels |
Ellor1 | 0:473988c75437 | 19 | * |
Ellor1 | 0:473988c75437 | 20 | * @code |
Ellor1 | 0:473988c75437 | 21 | * #include "mbed.h" |
Ellor1 | 0:473988c75437 | 22 | * #include "TextLCD.h" |
Ellor1 | 0:473988c75437 | 23 | * |
Ellor1 | 0:473988c75437 | 24 | * TextLCD lcd(p10, p12, p15, p16, p29, p30); // rs, e, d4-d7 |
Ellor1 | 0:473988c75437 | 25 | * |
Ellor1 | 0:473988c75437 | 26 | * int main() { |
Ellor1 | 0:473988c75437 | 27 | * lcd.printf("Hello World!\n"); |
Ellor1 | 0:473988c75437 | 28 | * } |
Ellor1 | 0:473988c75437 | 29 | * @endcode |
Ellor1 | 0:473988c75437 | 30 | */ |
Ellor1 | 0:473988c75437 | 31 | class TextLCD : public Stream { |
Ellor1 | 0:473988c75437 | 32 | public: |
Ellor1 | 0:473988c75437 | 33 | |
Ellor1 | 0:473988c75437 | 34 | /** LCD panel format */ |
Ellor1 | 0:473988c75437 | 35 | enum LCDType { |
Ellor1 | 0:473988c75437 | 36 | LCD16x2 /**< 16x2 LCD panel (default) */ |
Ellor1 | 0:473988c75437 | 37 | , LCD16x2B /**< 16x2 LCD panel alternate addressing */ |
Ellor1 | 0:473988c75437 | 38 | , LCD20x2 /**< 20x2 LCD panel */ |
Ellor1 | 0:473988c75437 | 39 | , LCD20x4 /**< 20x4 LCD panel */ |
Ellor1 | 1:6ad3406d5912 | 40 | , LCD16x4 /**< 16x4 LCD panel */ //added to work with 16x4 |
Ellor1 | 0:473988c75437 | 41 | }; |
Ellor1 | 0:473988c75437 | 42 | |
Ellor1 | 0:473988c75437 | 43 | /** Create a TextLCD interface |
Ellor1 | 0:473988c75437 | 44 | * |
Ellor1 | 0:473988c75437 | 45 | * @param rs Instruction/data control line |
Ellor1 | 0:473988c75437 | 46 | * @param e Enable line (clock) |
Ellor1 | 0:473988c75437 | 47 | * @param d4-d7 Data lines for using as a 4-bit interface |
Ellor1 | 0:473988c75437 | 48 | * @param type Sets the panel size/addressing mode (default = LCD16x2) |
Ellor1 | 0:473988c75437 | 49 | */ |
Ellor1 | 0:473988c75437 | 50 | TextLCD(PinName rs, PinName e, PinName d4, PinName d5, PinName d6, PinName d7, LCDType type = LCD16x2); |
Ellor1 | 0:473988c75437 | 51 | |
Ellor1 | 0:473988c75437 | 52 | #if DOXYGEN_ONLY |
Ellor1 | 0:473988c75437 | 53 | /** Write a character to the LCD |
Ellor1 | 0:473988c75437 | 54 | * |
Ellor1 | 0:473988c75437 | 55 | * @param c The character to write to the display |
Ellor1 | 0:473988c75437 | 56 | */ |
Ellor1 | 0:473988c75437 | 57 | int putc(int c); |
Ellor1 | 0:473988c75437 | 58 | |
Ellor1 | 0:473988c75437 | 59 | /** Write a formated string to the LCD |
Ellor1 | 0:473988c75437 | 60 | * |
Ellor1 | 0:473988c75437 | 61 | * @param format A printf-style format string, followed by the |
Ellor1 | 0:473988c75437 | 62 | * variables to use in formating the string. |
Ellor1 | 0:473988c75437 | 63 | */ |
Ellor1 | 0:473988c75437 | 64 | int printf(const char* format, ...); |
Ellor1 | 0:473988c75437 | 65 | #endif |
Ellor1 | 0:473988c75437 | 66 | |
Ellor1 | 0:473988c75437 | 67 | /** Locate to a screen column and row |
Ellor1 | 0:473988c75437 | 68 | * |
Ellor1 | 0:473988c75437 | 69 | * @param column The horizontal position from the left, indexed from 0 |
Ellor1 | 0:473988c75437 | 70 | * @param row The vertical position from the top, indexed from 0 |
Ellor1 | 0:473988c75437 | 71 | */ |
Ellor1 | 0:473988c75437 | 72 | void locate(int column, int row); |
Ellor1 | 0:473988c75437 | 73 | |
Ellor1 | 0:473988c75437 | 74 | /** Clear the screen and locate to 0,0 */ |
Ellor1 | 0:473988c75437 | 75 | void cls(); |
Ellor1 | 0:473988c75437 | 76 | |
Ellor1 | 0:473988c75437 | 77 | int rows(); |
Ellor1 | 0:473988c75437 | 78 | int columns(); |
Ellor1 | 0:473988c75437 | 79 | |
Ellor1 | 0:473988c75437 | 80 | protected: |
Ellor1 | 0:473988c75437 | 81 | |
Ellor1 | 0:473988c75437 | 82 | // Stream implementation functions |
Ellor1 | 0:473988c75437 | 83 | virtual int _putc(int value); |
Ellor1 | 0:473988c75437 | 84 | virtual int _getc(); |
Ellor1 | 0:473988c75437 | 85 | |
Ellor1 | 0:473988c75437 | 86 | int address(int column, int row); |
Ellor1 | 0:473988c75437 | 87 | void character(int column, int row, int c); |
Ellor1 | 0:473988c75437 | 88 | void writeByte(int value); |
Ellor1 | 0:473988c75437 | 89 | void writeCommand(int command); |
Ellor1 | 0:473988c75437 | 90 | void writeData(int data); |
Ellor1 | 0:473988c75437 | 91 | int wait_n; |
Ellor1 | 0:473988c75437 | 92 | |
Ellor1 | 0:473988c75437 | 93 | DigitalOut _rs, _e; |
Ellor1 | 0:473988c75437 | 94 | BusOut _d; |
Ellor1 | 0:473988c75437 | 95 | LCDType _type; |
Ellor1 | 0:473988c75437 | 96 | |
Ellor1 | 0:473988c75437 | 97 | int _column; |
Ellor1 | 0:473988c75437 | 98 | int _row; |
Ellor1 | 0:473988c75437 | 99 | |
Ellor1 | 0:473988c75437 | 100 | }; |
Ellor1 | 0:473988c75437 | 101 | |
Ellor1 | 0:473988c75437 | 102 | #endif |