main.cpp

00001 /*
00002 
00003 mbed Can-Bus demo
00004 
00005 This program is to demonstrate the CAN-bus capability of the mbed module.
00006 
00007 http://www.skpang.co.uk/catalog/product_info.php?products_id=741
00008 
00009 v1.0 July 2010
00010 
00011 ********************************************************************************
00012 
00013 WARNING: Use at your own risk, sadly this software comes with no guarantees.
00014 This software is provided 'free' and in good faith, but the author does not
00015 accept liability for any damage arising from its use.
00016 
00017 ********************************************************************************
00018 
00019 
00020 */
00021 
00022 #include "mbed.h"
00023 #include "ecu_reader.h"
00024 #include "globals.h"
00025 #include "TextLCD.h"
00026 #include "GPS.h"
00027 #include "SDFileSystem.h"
00028 
00029 GPS gps(p28, p27);
00030 TextLCD lcd(p18, p19, p20, p17, p16, p15, p14); // rs, rw, e, d0, d1, d2, d3
00031 SDFileSystem sd(p5, p6, p7, p13, "sd");
00032 
00033 DigitalIn click(p21);   // Joystick inputs
00034 DigitalIn right(p22);
00035 DigitalIn down(p23);
00036 DigitalIn left(p24);
00037 DigitalIn up(p25);
00038 Serial pc(USBTX, USBRX);
00039 
00040 
00041 ecu_reader obdii(CANSPEED_500);     //Create object and set CAN speed
00042 void gps_demo(void);
00043 void sd_demo(void);
00044 
00045 int main() {
00046     pc.baud(115200);
00047     char buffer[20];
00048     
00049     //Enable Pullup 
00050     click.mode(PullUp);
00051     right.mode(PullUp);
00052     down.mode(PullUp);
00053     left.mode(PullUp);
00054     up.mode(PullUp);
00055     
00056     printf("ECU Reader \n"); 
00057     lcd.locate(0,0);                // Set LCD cursor position
00058     lcd.printf("CAN-Bus demo");
00059     
00060     lcd.locate(0,1);
00061     lcd.printf("www.skpang.co.uk");
00062        
00063     pc.printf("\n\rCAN-bus demo...");
00064     
00065     wait(3);
00066     lcd.cls();
00067     lcd.printf("Use joystick");
00068 
00069     lcd.locate(0,1);
00070     lcd.printf("U-CAN:D-GPS:L-SD");
00071     
00072     pc.printf("\nU-CAN:D-GPS:L-SD");
00073 
00074     while(1)    // Wait until option is selected by the joystick
00075     {
00076    
00077         if(down == 0) gps_demo();
00078         if(left == 0) sd_demo();
00079                
00080         if(up == 0) break;
00081         
00082     }
00083     lcd.cls();
00084 
00085     while(1) {  // Main CAN loop
00086         led2 = 1;
00087         wait(0.1);
00088         led2 = 0;
00089         wait(0.1);
00090         
00091         if(obdii.request(ENGINE_RPM,buffer) == 1)   // Get engine rpm and display on LCD
00092         {
00093             lcd.locate(0,0);
00094             lcd.printf(buffer);
00095               pc.printf(buffer);
00096         }   
00097          
00098         if(obdii.request(ENGINE_COOLANT_TEMP,buffer) == 1)
00099         {
00100             lcd.locate(9,0);
00101             lcd.printf(buffer);
00102         }
00103         
00104         if(obdii.request(VEHICLE_SPEED,buffer) == 1)
00105         {
00106             lcd.locate(0,1);
00107             lcd.printf(buffer);
00108         }
00109      
00110         if(obdii.request(THROTTLE,buffer) ==1 )
00111         {
00112             lcd.locate(9,1);
00113             lcd.printf(buffer);          
00114         }   
00115        
00116     }
00117 }
00118 
00119 void gps_demo(void)
00120 {
00121     lcd.cls();
00122     lcd.printf("GPS demo");
00123     lcd.locate(0,1);
00124     lcd.printf("Waiting for lock");
00125  
00126     wait(3);    
00127     lcd.cls();
00128    
00129     while(1)
00130     {
00131       if(gps.sample()) {
00132          lcd.cls();
00133         lcd.printf("Long:%f", gps.longitude);
00134            lcd.locate(0,1);
00135         lcd.printf("Lat:%f", gps.latitude);
00136             pc.printf("I'm at %f, %f\n", gps.longitude, gps.latitude);
00137         } else {
00138             pc.printf("Oh Dear! No lock :(\n");
00139             lcd.cls();
00140             lcd.printf("Waiting for lock");
00141    
00142         }
00143     }
00144  
00145 }
00146 
00147 void sd_demo(void)
00148 {
00149     lcd.cls();
00150      printf("\nSD demo");
00151     lcd.printf("SD demo");
00152     wait(2);      
00153     lcd.cls();
00154     
00155     FILE *fp = fopen("/sd/sdtest2.txt", "w");
00156     if(fp == NULL) {
00157         lcd.cls();
00158         lcd.printf("Could not open file for write\n");
00159          pc.printf("\nCould not open file for write");
00160     }
00161     fprintf(fp, "Hello fun SD Card World! testing 1234");
00162     fclose(fp); 
00163     lcd.locate(0,1);
00164     lcd.printf("Writtern to SD card");
00165     pc.printf("\nWrittern to SD card");
00166         
00167     while(1)
00168     {
00169         led2 = 1;
00170         wait(0.1);
00171         led2 = 0;
00172         wait(0.1);
00173    
00174     }
00175  
00176 }