jim herd
Set of routines to access 16*32character LCD display on WattBob I board.
Dependents: Assignment_2_herpe Final_V1 ass2 ass2 ... more
WattBob_TextLCD.h@3:9c142edbfae8, 2010-11-29 (annotated)
- Committer:
- jimherd
- Date:
- Mon Nov 29 14:51:07 2010 +0000
- Revision:
- 3:9c142edbfae8
- Parent:
- 2:1cba2dd23d65
- Child:
- 4:f06e69c4c7f3
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| jimherd | 0:e5b7c70254ac | 1 | /* draft mbed TextLCD |
| jimherd | 0:e5b7c70254ac | 2 | * (c) 2007/8, sford |
| jimherd | 0:e5b7c70254ac | 3 | */ |
| jimherd | 0:e5b7c70254ac | 4 | |
| jimherd | 0:e5b7c70254ac | 5 | #ifndef WATTBOB_TEXTLCD_H |
| jimherd | 0:e5b7c70254ac | 6 | #define WATTBOB_TEXTLCD_H |
| jimherd | 0:e5b7c70254ac | 7 | |
| jimherd | 0:e5b7c70254ac | 8 | #include "mbed.h" |
| jimherd | 0:e5b7c70254ac | 9 | #include "Stream.h" |
| jimherd | 0:e5b7c70254ac | 10 | #include "MCP23017.h" |
| jimherd | 0:e5b7c70254ac | 11 | |
| jimherd | 0:e5b7c70254ac | 12 | #define RS_BIT 7 |
| jimherd | 0:e5b7c70254ac | 13 | #define RW_BIT 6 |
| jimherd | 0:e5b7c70254ac | 14 | #define E_BIT 5 |
| jimherd | 0:e5b7c70254ac | 15 | #define BL_BIT 4 |
| jimherd | 0:e5b7c70254ac | 16 | |
| jimherd | 1:190b705fb9e1 | 17 | /** Class to access 16*2 LCD display connected to an MCP23017 I/O extender chip |
| jimherd | 1:190b705fb9e1 | 18 | * |
| jimherd | 1:190b705fb9e1 | 19 | * Derived from the "stream" class to be able to use methods such as "printf" |
| jimherd | 1:190b705fb9e1 | 20 | * |
| jimherd | 1:190b705fb9e1 | 21 | * Example : |
| jimherd | 1:190b705fb9e1 | 22 | * @code |
| jimherd | 1:190b705fb9e1 | 23 | * MCP23017 *par_port; |
| jimherd | 1:190b705fb9e1 | 24 | * WattBob_TextLCD *lcd; |
| jimherd | 1:190b705fb9e1 | 25 | * ..... |
| jimherd | 3:9c142edbfae8 | 26 | * int main() |
| jimherd | 3:9c142edbfae8 | 27 | * par_port = new MCP23017(p9, p10, 0x40); |
| jimherd | 3:9c142edbfae8 | 28 | * par_port->config(0x0F00, 0x0F00, 0x0F00); // configure MCP23017 chip on WattBob |
| jimherd | 3:9c142edbfae8 | 29 | * lcd = new WattBob_TextLCD(par_port); |
| jimherd | 3:9c142edbfae8 | 30 | * |
| jimherd | 1:190b705fb9e1 | 31 | * par_port->write_bit(1,BL_BIT); // turn LCD backlight ON |
| jimherd | 1:190b705fb9e1 | 32 | * lcd->cls(); lcd->locate(0,0); |
| jimherd | 1:190b705fb9e1 | 33 | * lcd->printf("%s", message); |
| jimherd | 1:190b705fb9e1 | 34 | * lcd->locate(1,0);lcd->printf("press 1 to cont"); |
| jimherd | 1:190b705fb9e1 | 35 | * @endcode |
| jimherd | 1:190b705fb9e1 | 36 | */ |
| jimherd | 0:e5b7c70254ac | 37 | class WattBob_TextLCD : public Stream { |
| jimherd | 0:e5b7c70254ac | 38 | |
| jimherd | 0:e5b7c70254ac | 39 | public: |
| jimherd | 1:190b705fb9e1 | 40 | /** Create TextLCD object connected to a MCP23017 device |
| jimherd | 1:190b705fb9e1 | 41 | * |
| jimherd | 1:190b705fb9e1 | 42 | * @param port pointer to MCP23017 object |
| jimherd | 1:190b705fb9e1 | 43 | */ |
| jimherd | 1:190b705fb9e1 | 44 | WattBob_TextLCD(MCP23017 *port); |
| jimherd | 1:190b705fb9e1 | 45 | |
| jimherd | 1:190b705fb9e1 | 46 | /** Set cursor to a known point |
| jimherd | 1:190b705fb9e1 | 47 | * |
| jimherd | 1:190b705fb9e1 | 48 | * Virtual function for stream class |
| jimherd | 1:190b705fb9e1 | 49 | * |
| jimherd | 1:190b705fb9e1 | 50 | * @param row integer row number (0 or 1) |
| jimherd | 1:190b705fb9e1 | 51 | * @param col integer column number (0 or 15) |
| jimherd | 1:190b705fb9e1 | 52 | */ |
| jimherd | 0:e5b7c70254ac | 53 | virtual void locate(int row, int column); |
| jimherd | 1:190b705fb9e1 | 54 | |
| jimherd | 1:190b705fb9e1 | 55 | /** clear display |
| jimherd | 1:190b705fb9e1 | 56 | * |
| jimherd | 1:190b705fb9e1 | 57 | * Virtual function for stream class |
| jimherd | 1:190b705fb9e1 | 58 | */ |
| jimherd | 1:190b705fb9e1 | 59 | virtual void cls(); |
| jimherd | 1:190b705fb9e1 | 60 | |
| jimherd | 1:190b705fb9e1 | 61 | /** reset the display |
| jimherd | 1:190b705fb9e1 | 62 | * |
| jimherd | 1:190b705fb9e1 | 63 | * Virtual function for stream class |
| jimherd | 1:190b705fb9e1 | 64 | */ |
| jimherd | 0:e5b7c70254ac | 65 | virtual void reset(); |
| jimherd | 0:e5b7c70254ac | 66 | |
| jimherd | 0:e5b7c70254ac | 67 | protected: |
| jimherd | 0:e5b7c70254ac | 68 | |
| jimherd | 1:190b705fb9e1 | 69 | virtual int _putc(int c); |
| jimherd | 1:190b705fb9e1 | 70 | virtual int _getc(); |
| jimherd | 1:190b705fb9e1 | 71 | virtual void newline(); |
| jimherd | 1:190b705fb9e1 | 72 | |
| jimherd | 0:e5b7c70254ac | 73 | void clock(); |
| jimherd | 0:e5b7c70254ac | 74 | void writeData(int data); |
| jimherd | 0:e5b7c70254ac | 75 | void writeCommand(int command); |
| jimherd | 0:e5b7c70254ac | 76 | void writeByte(int value); |
| jimherd | 0:e5b7c70254ac | 77 | void writeNibble(int value); |
| jimherd | 0:e5b7c70254ac | 78 | |
| jimherd | 0:e5b7c70254ac | 79 | void _rs (int data); |
| jimherd | 0:e5b7c70254ac | 80 | void _rw (int data); |
| jimherd | 0:e5b7c70254ac | 81 | void _e (int data); |
| jimherd | 0:e5b7c70254ac | 82 | void _d (int data); |
| jimherd | 1:190b705fb9e1 | 83 | |
| jimherd | 0:e5b7c70254ac | 84 | int _rows; |
| jimherd | 0:e5b7c70254ac | 85 | int _columns; |
| jimherd | 0:e5b7c70254ac | 86 | int _row; |
| jimherd | 0:e5b7c70254ac | 87 | int _column; |
| jimherd | 0:e5b7c70254ac | 88 | |
| jimherd | 0:e5b7c70254ac | 89 | private: |
| jimherd | 0:e5b7c70254ac | 90 | MCP23017 *par_port; |
| jimherd | 0:e5b7c70254ac | 91 | }; |
| jimherd | 0:e5b7c70254ac | 92 | |
| jimherd | 0:e5b7c70254ac | 93 | #endif |