display.cpp

00001 /*
00002  * Weather Station - mbed Weather Platform
00003  * Copyright (c) 2011 Hiroshi Suga
00004  * Released under the MIT License: http://mbed.org/license/mit
00005  */
00006 
00007 /** @file
00008  * @brief Weather Station
00009  */
00010 
00011 #include "mbed.h"
00012 #include "weather.h"
00013 #ifdef USE_DISPLAY
00014 #include "I2CLEDDisp.h"
00015 #include "I2CLCD.h"
00016 
00017 static I2CLEDDisp *leddisp;
00018 static I2CLCD *lcd;
00019 static volatile int leddisp_freq = 0, leddisp_pos = -4;
00020 static char leddisp_buf[FORMAT_STR_SIZE];
00021 #endif
00022 
00023 void update_display () {
00024 #ifdef USE_DISPLAY
00025     char buf[FORMAT_STR_SIZE];
00026 
00027     if (conf.leddisp_mesg[0]) {
00028         format_str(conf.leddisp_mesg, leddisp_buf, sizeof_1(leddisp_buf));
00029     }
00030 
00031     if (conf.lcd_mesg[0]) {
00032         format_str(conf.lcd_mesg, buf, sizeof_1(buf));
00033         lcd->cls();
00034         lcd->puts(buf);
00035     }
00036 #endif
00037 }
00038 
00039 void pool_display () {
00040 #ifdef USE_DISPLAY
00041     int i, addr, len;
00042 
00043     // LED Display scroll
00044     if (conf.leddisp_mesg[0]) {
00045         leddisp_freq ++;
00046         if (leddisp_freq > LED_FREQ) {
00047 
00048             len = strlen(leddisp_buf);
00049             leddisp->locate(0, 0);
00050             for (i = 0; i < 4; i ++) {
00051                 addr = leddisp_pos + i;
00052                 if (addr >= 0 && addr < len) {
00053                     leddisp->putc(leddisp_buf[addr]);
00054                 } else {
00055                     leddisp->putc(' ');
00056                 }
00057             }
00058 
00059             leddisp_pos ++;
00060             if (leddisp_pos >= len + 4) {
00061                 leddisp_pos = -4;
00062             }
00063 
00064             leddisp_freq = 0;
00065         }
00066     }
00067 #endif
00068 }
00069 
00070 int init_display () {
00071 #ifdef USE_DISPLAY
00072 
00073     if (conf.lcd_mesg[0]) {
00074         lcd = new I2CLCD(i2c, I2CLCD_ADDR, conf.lcdtype, conf.lcdconf);
00075 #ifdef DEBUG
00076         printf("LCD: %s\r\n", conf.lcd_mesg);
00077 #endif
00078     }
00079 
00080     if (conf.leddisp_mesg[0]) {
00081         leddisp = new I2CLEDDisp(i2c);
00082         strncpy(leddisp_buf, VERSION, sizeof_1(leddisp_buf));
00083 #ifdef DEBUG
00084         printf("LED disp: %s\r\n", conf.leddisp_mesg);
00085 #endif
00086     }
00087 
00088 #endif
00089     return 0;
00090 }