main.cpp

00001 #include "mbed.h"
00002 #include "GPS.h"
00003 #include "TextLCD.h"
00004 GPS gps(PA_11,PA_12);
00005 I2C i2c_lcd(D14,D15); 
00006 TextLCD_I2C lcd(&i2c_lcd, 0x4E, TextLCD::LCD16x2); 
00007 Serial esp(D8,D2);
00008 DigitalIn bt(D5);
00009 
00010 uint8_t buffer[0x100];  
00011 uint16_t buffer_head;  
00012 uint16_t buffer_tail;  
00013 
00014 void rxcallback(void) {  
00015     uint8_t chr;  
00016     while (esp.readable()) {  
00017         chr = esp.getc();  
00018         pc.putc(chr);
00019         buffer[buffer_head++] = chr;  
00020         if (buffer_head == BUFFER_SIZE) 
00021         {  
00022             buffer_head = 0;  
00023         }  
00024     }  
00025 }
00026 void flush_fifo(void) 
00027 {  
00028     while (esp.readable()) 
00029     {  
00030         (void)esp.getc();  
00031     }  
00032     buffer_head = 0;  
00033     buffer_tail = 0;  
00034 }  
00035 int find_response(const char *resp) {  
00036     /* Give some delay for buffer to fill up */  
00037     wait_ms(10);  
00038     int timeout = 0xFFFFFF;  
00039     int len = strlen(resp);  
00040     do 
00041     {  
00042         if (buffer_head > (buffer_tail + len)) 
00043         {  
00044             if (!memcmp(&buffer[buffer_tail], resp, len)) 
00045             {  
00046                 flush_fifo();  
00047                 return 0;  
00048             }  
00049             buffer_tail++;  
00050         }  
00051     }while(timeout--);  
00052     flush_fifo();  
00053     return 1;  
00054 }
00055 
00056 int main() 
00057 {
00058     lcd.setMode(TextLCD::DispOn);
00059     lcd.setBacklight(TextLCD::LightOff);
00060     lcd.setCursor(TextLCD::CurOff_BlkOff);
00061     esp.attach(&rxcallback, Serial::RxIrq);
00062     lcd.setAddress(0,0);
00063     lcd.printf("Initial GPS...\n");
00064     esp.printf("AT+RST\r\n");
00065     MBED_ASSERT(find_response("OK") == 0);
00066     esp.printf("AT+CWMODE=1\r\n");
00067     MBED_ASSERT(find_response("OK") == 0);
00068     esp.printf("AT+CWJAP=\"%s\",\"%s\"\r\n","Fookies-One(m8)","12312344");
00069     wait(5);
00070     MBED_ASSERT(find_response("OK") == 0); 
00071     esp.printf("AT+CIPMUX=0\r\n");
00072     MBED_ASSERT(find_response("OK") == 0); 
00073     while(1){
00074         if(gps.sample())
00075         {
00076             lcd.setAddress(0,1);
00077             lcd.printf("%6.3f,%7.3f",gps.latitude,gps.longitude);
00078         }
00079         wait(0.5);
00080         if(bt==1)
00081         {
00082             sprintf(message,"GET /apps/thingtweet/1/statuses/update?key=T5M60A23PDCU6NIH&status=%.3f,%.3f",gps.latitude,gps.longitude);
00083             esp.printf("AT+CIPSTART=\"TCP\",\"%s\",%s\r\n","184.106.153.149","80");
00084             esp.printf("AT+CIPSEND=0,%d\r\n",strlen(message));
00085             if(find_response(">") == 0) 
00086             {
00087                 esp.printf(message);
00088             }
00089             wait(2);  
00090             flush_fifo();
00091             esp.printf("AT+CIPCLOSE\r\n");
00092             wait(0.5);  
00093             flush_fifo();
00094         }
00095     }
00096 }    
00097