Mercurial > mbsePi-apps / file comparison
comparison: thermferm/lcd-pcf8574.c
thermferm/lcd-pcf8574.c
- changeset 223
- 14700edd2a67
- parent 213
- 2317b8d644fa
- child 420
- 644a6106d712
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| 222:6519fc50f543 | 223:14700edd2a67 |
|---|---|
| 28 | 28 |
| 29 | 29 |
| 30 #ifdef HAVE_WIRINGPI_H | 30 #ifdef HAVE_WIRINGPI_H |
| 31 | 31 |
| 32 int lcdHandle; | 32 int lcdHandle; |
| 33 unsigned char lcdbuf[MAX_LCDS][21][4]; | |
| 34 | 33 |
| 35 struct lcdDataStruct | 34 struct lcdDataStruct |
| 36 { | 35 { |
| 37 int bits, rows, cols ; | 36 int bits, rows, cols ; |
| 38 int rsPin, strbPin ; | 37 int rsPin, strbPin ; |
| 41 }; | 40 }; |
| 42 | 41 |
| 43 extern struct lcdDataStruct *lcds [MAX_LCDS]; | 42 extern struct lcdDataStruct *lcds [MAX_LCDS]; |
| 44 extern sys_config Config; | 43 extern sys_config Config; |
| 45 | 44 |
| 46 | |
| 47 | |
| 48 /* | |
| 49 * Some LCD functions are extended shadow copies of the wiringPi functions. | |
| 50 * The difference is that the lcdbuf will be updated with the contents on | |
| 51 * the hardware display. This copy can then be used for a remote display | |
| 52 */ | |
| 53 | 45 |
| 54 | 46 |
| 55 /* | 47 /* |
| 56 * setBacklight: | 48 * setBacklight: |
| 57 ********************************************************************************* | 49 ********************************************************************************* |
| 70 ********************************************************************************* | 62 ********************************************************************************* |
| 71 */ | 63 */ |
| 72 | 64 |
| 73 int initLCD (int cols, int rows) | 65 int initLCD (int cols, int rows) |
| 74 { | 66 { |
| 75 int x, y; | |
| 76 | |
| 77 if (!((rows == 1) || (rows == 2) || (rows == 4))) { | 67 if (!((rows == 1) || (rows == 2) || (rows == 4))) { |
| 78 fprintf (stderr, "rows must be 1, 2 or 4\n") ; | 68 fprintf (stderr, "rows must be 1, 2 or 4\n") ; |
| 79 return EXIT_FAILURE ; | 69 return EXIT_FAILURE ; |
| 80 } | 70 } |
| 81 | 71 |
| 96 fprintf (stderr, "lcdInit failed\n") ; | 86 fprintf (stderr, "lcdInit failed\n") ; |
| 97 return -1 ; | 87 return -1 ; |
| 98 } | 88 } |
| 99 | 89 |
| 100 lcdClear (lcdHandle) ; | 90 lcdClear (lcdHandle) ; |
| 101 for (x = 0; x < Config.lcd_cols; x++) | |
| 102 for (y = 0; y < Config.lcd_rows; y++) | |
| 103 lcdbuf[lcdHandle][x][y] = ' '; | |
| 104 | |
| 105 setBacklight (1) ; | 91 setBacklight (1) ; |
| 106 | 92 |
| 107 return 0 ; | 93 return 0 ; |
| 108 } | 94 } |
| 109 | 95 |
| 110 | 96 |
| 111 | |
| 112 void mb_lcdPutchar(const int fd, unsigned char data) | |
| 113 { | |
| 114 struct lcdDataStruct *lcd = lcds[fd]; | |
| 115 | |
| 116 /* | |
| 117 * Write to our buffer first, then to the wiringPi driver. | |
| 118 * Writing to wiringPi updates the cursor position. | |
| 119 */ | |
| 120 lcdbuf[fd][lcd->cx][lcd->cy] = data; | |
| 121 lcdPutchar(fd, data); | |
| 122 } | |
| 123 | |
| 124 | |
| 125 | |
| 126 void mb_lcdPuts(const int fd, const char *string) | |
| 127 { | |
| 128 while (*string) | |
| 129 mb_lcdPutchar (fd, *string++); | |
| 130 } | |
| 131 | |
| 132 | |
| 133 | |
| 134 void mb_lcdClear(const int fd) | |
| 135 { | |
| 136 int x, y; | |
| 137 | |
| 138 lcdClear(fd); | |
| 139 for (x = 0; x < Config.lcd_cols; x++) | |
| 140 for (y = 0; y < Config.lcd_rows; y++) | |
| 141 lcdbuf[fd][x][y] = ' '; | |
| 142 } | |
| 143 | |
| 144 | |
| 145 | |
| 146 #endif | 97 #endif |
| 147 |
