main.cpp

00001 #include "mbed.h"
00002 #include "SDFileSystem.h"
00003  
00004 SDFileSystem sd(p5, p6, p7, p8, "sd"); // the pinout on the mbed Cool Components workshop board
00005 DigitalIn enable(p30);
00006 AnalogIn inpt(p20);
00007 DigitalOut myled(LED1);
00008  
00009 //float Log[16]={};
00010  
00011  Timer SDspeed;
00012 
00013 void SD(int num, float btry, float time, float stack_time){
00014     myled = 1;
00015     
00016 //    printf("Hello World!\n");   
00017  
00018     mkdir("/sd/mydir", 0777);
00019 
00020     
00021     SDspeed.start();
00022     
00023     FILE *fp_csv = fopen("/sd/mydir/SDtestSpeed.csv", "a");
00024     if(fp_csv == NULL) {
00025         error("Could not open file for write\n");
00026     }
00027     
00028     fprintf(fp_csv, "%d,%f,%.5f, %.5f\n", num, btry, time, stack_time);
00029     
00030     fclose(fp_csv); 
00031     
00032     SDspeed.stop();
00033 
00034 
00035     /////////////////
00036     
00037 //    FILE *fp_txt = fopen("/sd/mydir/sdtest.txt", "a");
00038 //    if(fp_txt == NULL) {
00039 //        error("Could not open file for write\n");
00040 //    }
00041 //    fprintf(fp_txt, "Hello fun SD Card World!\n");
00042 //    fprintf(fp_txt, "Hello fun SD Card World!\n");
00043 //    fprintf(fp_txt, "%f,%f\n", btry, (float)num);
00044 //    
00045 //    fclose(fp_txt); 
00046     
00047     
00048     printf("Goodbye World!\n");
00049     myled = 0;
00050 }
00051  
00052 int main() {
00053     float btry_lg = 0;
00054     int nmbr_lg = 0;
00055     float wrt_SD_time = 0;
00056     float sec = 0;
00057     
00058     FILE *fp_csv = fopen("/sd/mydir/SDtestSpeed.csv", "w");
00059     if(fp_csv == NULL) {
00060         error("Could not open file for write\n");
00061     }
00062     fprintf(fp_csv, "number, battery, time\n");
00063     fclose(fp_csv); 
00064     
00065     while(1){
00066         // test the voltage on the initialized analog pin
00067         //  and if greater than 0.3 * VCC set the digital pin
00068         //  to a logic 1 otherwise a logic 0
00069         btry_lg = inpt.read()*3.3;
00070         
00071         //if(ain > 0.3f) {    
00072         //} else {
00073         //}
00074         
00075         // print the percentage and 16 bit normalized values
00076         //printf("percentage: %3.3f%%\n", ain.read()*100.0f);
00077         //printf("normalized: 0x%04X \n", ain.read_u16());
00078         //wait(0.2f);
00079         
00080         nmbr_lg++;
00081    
00082         SD(nmbr_lg, btry_lg, wrt_SD_time, sec);
00083         wrt_SD_time = SDspeed.read();
00084         sec += wrt_SD_time;
00085         
00086         wait_us(10);
00087     }
00088 }