Katsushi Ogawa
I2cLCD.cpp@0:8a9ac3d4afdf, 2012-05-29 (annotated)
- Committer:
- KatsushiOgawa
- Date:
- Tue May 29 09:25:22 2012 +0000
- Revision:
- 0:8a9ac3d4afdf
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| KatsushiOgawa | 0:8a9ac3d4afdf | 1 | #include "I2cLCD.h" |
| KatsushiOgawa | 0:8a9ac3d4afdf | 2 | #include "mbed.h" |
| KatsushiOgawa | 0:8a9ac3d4afdf | 3 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 4 | #define I2CLCD_ADDR 0x7C |
| KatsushiOgawa | 0:8a9ac3d4afdf | 5 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 6 | #define RS_CMD 0x00 |
| KatsushiOgawa | 0:8a9ac3d4afdf | 7 | #define RS_DATA 0x40 |
| KatsushiOgawa | 0:8a9ac3d4afdf | 8 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 9 | #define FUNC_SET1 0x38 |
| KatsushiOgawa | 0:8a9ac3d4afdf | 10 | #define FUNC_SET2 0x39 |
| KatsushiOgawa | 0:8a9ac3d4afdf | 11 | #define INT_OSC 0x14 |
| KatsushiOgawa | 0:8a9ac3d4afdf | 12 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 13 | #define CNTR_DEF 0x20 |
| KatsushiOgawa | 0:8a9ac3d4afdf | 14 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 15 | unsigned char icon_data[]= |
| KatsushiOgawa | 0:8a9ac3d4afdf | 16 | { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 17 | 0x00, 0x10, |
| KatsushiOgawa | 0:8a9ac3d4afdf | 18 | 0x02, 0x10, |
| KatsushiOgawa | 0:8a9ac3d4afdf | 19 | 0x04, 0x10, |
| KatsushiOgawa | 0:8a9ac3d4afdf | 20 | 0x06, 0x10, |
| KatsushiOgawa | 0:8a9ac3d4afdf | 21 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 22 | 0x07, 0x10, |
| KatsushiOgawa | 0:8a9ac3d4afdf | 23 | 0x07, 0x08, |
| KatsushiOgawa | 0:8a9ac3d4afdf | 24 | 0x09, 0x10, |
| KatsushiOgawa | 0:8a9ac3d4afdf | 25 | 0x0B, 0x10, |
| KatsushiOgawa | 0:8a9ac3d4afdf | 26 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 27 | 0x0D, 0x08, |
| KatsushiOgawa | 0:8a9ac3d4afdf | 28 | 0x0D, 0x04, |
| KatsushiOgawa | 0:8a9ac3d4afdf | 29 | 0x0D, 0x02, |
| KatsushiOgawa | 0:8a9ac3d4afdf | 30 | 0x0D, 0x10, |
| KatsushiOgawa | 0:8a9ac3d4afdf | 31 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 32 | 0x0F, 0x10, |
| KatsushiOgawa | 0:8a9ac3d4afdf | 33 | }; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 34 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 35 | I2cLCD::I2cLCD(PinName sda, PinName scl, PinName rp) : _rs( rp ) , _i2c( sda , scl ){ |
| KatsushiOgawa | 0:8a9ac3d4afdf | 36 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 37 | contrast = CNTR_DEF; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 38 | icon = 0; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 39 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 40 | wait(0.015); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 41 | // reset LOW->HIGH |
| KatsushiOgawa | 0:8a9ac3d4afdf | 42 | _rs = 0; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 43 | wait(0.01); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 44 | _rs = 1; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 45 | wait(0.05); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 46 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 47 | writeCommand(FUNC_SET1); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 48 | writeCommand(FUNC_SET2); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 49 | writeCommand(INT_OSC); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 50 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 51 | writeCommand(0x70 | (contrast & 0xF)); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 52 | writeCommand(0x5C | ((contrast >> 4) & 0x3)); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 53 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 54 | writeCommand(0x6C); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 55 | wait(0.3); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 56 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 57 | writeCommand(0x38); // function set |
| KatsushiOgawa | 0:8a9ac3d4afdf | 58 | writeCommand(0x0C); // Display On |
| KatsushiOgawa | 0:8a9ac3d4afdf | 59 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 60 | cls(); // Clear Display |
| KatsushiOgawa | 0:8a9ac3d4afdf | 61 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 62 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 63 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 64 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 65 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 66 | void I2cLCD::character(int column, int row, int c) { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 67 | int a = address(column, row); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 68 | writeCommand(a); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 69 | writeData(c); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 70 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 71 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 72 | void I2cLCD::cls() { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 73 | writeCommand(0x01); // cls, and set cursor to 0 |
| KatsushiOgawa | 0:8a9ac3d4afdf | 74 | wait(0.00164f); // This command takes 1.64 ms |
| KatsushiOgawa | 0:8a9ac3d4afdf | 75 | locate(0, 0); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 76 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 77 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 78 | void I2cLCD::locate(int column, int row) { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 79 | _column = column; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 80 | _row = row; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 81 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 82 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 83 | int I2cLCD::_putc(int value) { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 84 | if (value == '\n') { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 85 | _column = 0; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 86 | _row++; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 87 | if (_row >= rows()) { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 88 | _row = 0; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 89 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 90 | } else { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 91 | character(_column, _row, value); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 92 | _column++; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 93 | if (_column >= columns()) { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 94 | _column = 0; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 95 | _row++; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 96 | if (_row >= rows()) { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 97 | _row = 0; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 98 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 99 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 100 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 101 | return value; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 102 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 103 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 104 | int I2cLCD::_getc() { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 105 | return -1; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 106 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 107 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 108 | void I2cLCD::writeCommand( int cmd ) |
| KatsushiOgawa | 0:8a9ac3d4afdf | 109 | { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 110 | char cmds[2]; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 111 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 112 | cmds[0] = RS_CMD; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 113 | cmds[1] = cmd; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 114 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 115 | _i2c.write(I2CLCD_ADDR, cmds, 2); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 116 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 117 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 118 | void I2cLCD::writeData( int data ) |
| KatsushiOgawa | 0:8a9ac3d4afdf | 119 | { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 120 | char cmd[2]; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 121 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 122 | cmd[0] = RS_DATA; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 123 | cmd[1] = data; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 124 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 125 | _i2c.write(I2CLCD_ADDR, cmd, 2); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 126 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 127 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 128 | int I2cLCD::address(int column, int row) { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 129 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 130 | return 0x80 + (row * 0x40) + column; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 131 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 132 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 133 | int I2cLCD::columns() { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 134 | return 16; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 135 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 136 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 137 | int I2cLCD::rows() { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 138 | return 2; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 139 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 140 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 141 | void I2cLCD::seticon(IconType type) |
| KatsushiOgawa | 0:8a9ac3d4afdf | 142 | { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 143 | icon |= type; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 144 | puticon( icon ); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 145 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 146 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 147 | void I2cLCD::clearicon(IconType type) |
| KatsushiOgawa | 0:8a9ac3d4afdf | 148 | { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 149 | icon &= ~type; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 150 | puticon( icon ); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 151 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 152 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 153 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 154 | void I2cLCD::puticon(int flg) |
| KatsushiOgawa | 0:8a9ac3d4afdf | 155 | { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 156 | static unsigned char icon_buff[16]; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 157 | unsigned char i; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 158 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 159 | for(i=0;i<sizeof(icon_data)/2;i++) |
| KatsushiOgawa | 0:8a9ac3d4afdf | 160 | { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 161 | if(flg & (0x1000>>i)) |
| KatsushiOgawa | 0:8a9ac3d4afdf | 162 | { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 163 | icon_buff[icon_data[i*2]] |= icon_data[i*2+1]; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 164 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 165 | else |
| KatsushiOgawa | 0:8a9ac3d4afdf | 166 | { |
| KatsushiOgawa | 0:8a9ac3d4afdf | 167 | icon_buff[icon_data[i*2]] &= ~icon_data[i*2+1]; |
| KatsushiOgawa | 0:8a9ac3d4afdf | 168 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 169 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 170 | |
| KatsushiOgawa | 0:8a9ac3d4afdf | 171 | for(i=0;i<16;i++){ |
| KatsushiOgawa | 0:8a9ac3d4afdf | 172 | writeCommand(0x39); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 173 | writeCommand(0x40+i); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 174 | writeData(icon_buff[i]); |
| KatsushiOgawa | 0:8a9ac3d4afdf | 175 | } |
| KatsushiOgawa | 0:8a9ac3d4afdf | 176 | } |