Mercurial > mbsePi-apps / file comparison
comparison: thermferm/lcd-buffer.c
thermferm/lcd-buffer.c
- changeset 108
- 50d2187fdb74
- parent 106
- 1bd9a16f5061
- child 200
- a215ddaabbe2
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| 107:f2f201b7cb48 | 108:50d2187fdb74 |
|---|---|
| 1 /***************************************************************************** | 1 /***************************************************************************** |
| 2 * Copyright (C) 2008-2014 | 2 * Copyright (C) 2014 |
| 3 * | 3 * |
| 4 * Michiel Broek <mbroek at mbse dot eu> | 4 * Michiel Broek <mbroek at mbse dot eu> |
| 5 * | 5 * |
| 6 * This file is part of the mbsePi-apps | 6 * This file is part of the mbsePi-apps |
| 7 * | 7 * |
| 20 * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | 20 * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 21 *****************************************************************************/ | 21 *****************************************************************************/ |
| 22 | 22 |
| 23 #include "thermferm.h" | 23 #include "thermferm.h" |
| 24 #include "lcd-buffer.h" | 24 #include "lcd-buffer.h" |
| 25 #include "lcd-pcf8574.h" | |
| 26 | |
| 25 | 27 |
| 26 #ifdef HAVE_WIRINGPI_H | 28 #ifdef HAVE_WIRINGPI_H |
| 27 | 29 |
| 30 int current_lines = 0; | |
| 31 int current_offset = 0; | |
| 32 int current_second = 0; | |
| 33 lcd_rows *my_lcd_rows = NULL; | |
| 34 | |
| 35 extern int lcdHandle; | |
| 36 extern sys_config Config; | |
| 37 | |
| 38 | |
| 39 | |
| 40 /* | |
| 41 * Write to buffer array. Allocate more lines if needed. | |
| 42 */ | |
| 43 void lcd_buf_write(int row, const char *format, ...) | |
| 44 { | |
| 45 char buf[21 * sizeof(char)]; | |
| 46 va_list va_ptr; | |
| 47 lcd_rows *tmp, *newrow; | |
| 48 int i = 0; | |
| 49 | |
| 50 va_start(va_ptr, format); | |
| 51 vsnprintf(buf, 20 * sizeof(char), format, va_ptr); | |
| 52 va_end(va_ptr); | |
| 53 | |
| 54 /* | |
| 55 * Check if the line in row is allocated. If not, do it | |
| 56 * and make sure the chain is valid. | |
| 57 */ | |
| 58 while (row > current_lines) { | |
| 59 | |
| 60 newrow = (lcd_rows *)malloc(sizeof(lcd_rows)); | |
| 61 newrow->next = NULL; | |
| 62 snprintf(newrow->row, 21 * sizeof(char), " "); | |
| 63 | |
| 64 if (my_lcd_rows == NULL) { | |
| 65 my_lcd_rows = newrow; | |
| 66 } else { | |
| 67 for (tmp = my_lcd_rows; tmp; tmp = tmp->next) { | |
| 68 if (tmp->next == NULL) { | |
| 69 tmp->next = newrow; | |
| 70 current_lines++; | |
| 71 break; | |
| 72 } | |
| 73 } | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 /* | |
| 78 * Now update the text | |
| 79 */ | |
| 80 for (tmp = my_lcd_rows; tmp; tmp = tmp->next) { | |
| 81 i++; | |
| 82 if (i == row) { | |
| 83 snprintf(tmp->row, Config.lcd_cols + 1, "%s", buf); | |
| 84 break; | |
| 85 } | |
| 86 } | |
| 87 } | |
| 88 | |
| 89 | |
| 90 | |
| 91 /* | |
| 92 * This will be called each second. | |
| 93 */ | |
| 94 void lcd_buf_show(void) | |
| 95 { | |
| 96 int i = 0, r = 0; | |
| 97 lcd_rows *tmp; | |
| 98 | |
| 99 for (tmp = my_lcd_rows; tmp; tmp = tmp->next) { | |
| 100 if (i == current_offset) | |
| 101 break; | |
| 102 i++; | |
| 103 } | |
| 104 | |
| 105 lcdPosition(lcdHandle, 0, r); | |
| 106 mb_lcdPuts(lcdHandle, tmp->row); | |
| 107 | |
| 108 r++; | |
| 109 if (r < Config.lcd_rows) { | |
| 110 if (tmp->next != NULL) | |
| 111 tmp = tmp->next; | |
| 112 else | |
| 113 tmp = my_lcd_rows; | |
| 114 lcdPosition(lcdHandle, 0, r); | |
| 115 mb_lcdPuts(lcdHandle, tmp->row); | |
| 116 } | |
| 117 | |
| 118 current_second++; | |
| 119 if (current_second < 5) | |
| 120 return; | |
| 121 | |
| 122 /* | |
| 123 * Wrap display | |
| 124 */ | |
| 125 current_second = 0; | |
| 126 if (current_offset < (current_lines - Config.lcd_rows)) | |
| 127 current_offset = current_offset + Config.lcd_rows; | |
| 128 else | |
| 129 current_offset = 0; | |
| 130 } | |
| 28 | 131 |
| 29 | 132 |
| 30 | 133 |
| 31 #endif | 134 #endif |
