main.cpp

00001 #include "mbed.h"
00002 #include "GPS.h"
00003 #include "TextLCD.h"
00004 #define BUFFER_SIZE 100
00005 
00006 GPS gps(PA_11,PA_12);
00007 I2C i2c_lcd(D14,D15); 
00008 TextLCD_I2C lcd(&i2c_lcd, 0x4E, TextLCD::LCD16x2); 
00009 Serial esp(D8,D2);
00010 DigitalIn bt(D5,PullUp);
00011 Serial pc(USBTX, USBRX);
00012 char message[400];
00013 
00014 uint8_t buffer[0x100];  
00015 uint16_t buffer_head;  
00016 uint16_t buffer_tail;  
00017 char s1[100];
00018 
00019 
00020 void rxcallback(void) {  
00021     uint8_t chr;  
00022     while (esp.readable()) {  
00023         chr = esp.getc();  
00024         pc.putc(chr);
00025         buffer[buffer_head++] = chr;  
00026         if (buffer_head == BUFFER_SIZE) 
00027         {  
00028             buffer_head = 0;  
00029         }  
00030     }  
00031 }
00032 void flush_fifo(void) 
00033 {  
00034     while (esp.readable()) 
00035     {  
00036         (void)esp.getc();  
00037     }  
00038     buffer_head = 0;  
00039     buffer_tail = 0;  
00040 }  
00041 int find_response(const char *resp) {  
00042     /* Give some delay for buffer to fill up */  
00043     wait_ms(10);  
00044     int timeout = 0xFFFFFF;  
00045     int len = strlen(resp);  
00046     do 
00047     {  
00048         if (buffer_head > (buffer_tail + len)) 
00049         {  
00050             if (!memcmp(&buffer[buffer_tail], resp, len)) 
00051             {  
00052                 flush_fifo();  
00053                 return 0;  
00054             }  
00055             buffer_tail++;  
00056         }  
00057     }while(timeout--);  
00058     flush_fifo();  
00059     return 1;  
00060 }
00061 
00062 int main() 
00063 {
00064     lcd.setMode(TextLCD::DispOn);
00065     lcd.setBacklight(TextLCD::LightOff);
00066     lcd.setCursor(TextLCD::CurOff_BlkOff);
00067     esp.attach(&rxcallback, Serial::RxIrq);
00068     lcd.setAddress(0,0);
00069     lcd.printf("Initial GPS...\n");
00070     esp.printf("AT+RST\r\n");
00071     //lcd.printf("1\n");
00072     MBED_ASSERT(find_response("OK") == 0);
00073     //lcd.printf("2\n");
00074     esp.printf("AT+CWMODE=1\r\n");
00075     //MBED_ASSERT(find_response("OK") == 0);
00076     //lcd.printf("3\n");
00077     esp.printf("AT+CWJAP=\"%s\",\"%s\"\r\n","Fookies-One(m8)","12312344");
00078     wait(5);
00079     //MBED_ASSERT(find_response("OK") == 0); 
00080     //lcd.printf("4\n");
00081     esp.printf("AT+CIPMUX=0\r\n");
00082     //MBED_ASSERT(find_response("OK") == 0); 
00083     //lcd.printf("5\n");
00084     while(1){
00085         if(gps.sample())
00086         {
00087             lcd.cls();
00088             lcd.printf("LAT:%6.3f\nLON:%7.3f",gps.latitude,gps.longitude);
00089         }
00090         wait(0.5);
00091         if(bt==0)
00092         {
00093             lcd.cls();
00094             lcd.printf("Sending to twitter");
00095             
00096             sprintf(s1,"api_key=GRMKGK1CTUU7L5RD&status=LAT:%.3f,LON:%.3f",gps.latitude,gps.longitude);
00097             sprintf(message,"POST /apps/thingtweet/1/statuses/update HTTP/1.1\nHost: api.thingspeak.com\nConnection: close\nContent-Type: application/x-www-form-urlencoded\nContent-Length: %d\n\n%s",strlen(s1),s1);
00098             esp.printf("AT+CIPSTART=\"TCP\",\"%s\",%s\r\n","184.106.153.149","80");
00099                 //lcd.cls();
00100                 //lcd.printf("AT+CIPSTART=\"TCP\",\"%s\",%s\r\n","184.106.153.149","80");
00101             wait(2);
00102             esp.printf("AT+CIPSEND=%d\r\n",strlen(message));
00103                 //lcd.cls();
00104                 //lcd.printf("AT+CIPSEND=%d\r\n",strlen(message));
00105                 wait(2);
00106             if(find_response(">") == 0) 
00107             {
00108                 //lcd.cls();
00109                 //lcd.printf(message);
00110                 esp.printf(message);
00111             }
00112             wait(2);  
00113             flush_fifo();
00114             esp.printf("AT+CIPCLOSE\r\n");
00115             wait(0.5);  
00116             flush_fifo();
00117             lcd.cls();
00118             lcd.printf("Send Completed\n");
00119         }
00120     }
00121 }    
00122