Diff: main.cpp

Revision:

1:291cc733b64a

Parent:

0:879aa9d0247b

Child:

2:091e7846d11a

--- a/main.cpp	Tue Feb 12 17:39:05 2013 +0000
+++ b/main.cpp	Thu Apr 28 10:26:00 2016 +0000
@@ -1,10 +1,114 @@
 #include "mbed.h"
+
+#define mBED2
+
+#define VCC 3.3
+#define B 3984
+#define K 273
+#define T0 (K+25)
+#define R0 10000
+#define TEMP_LIMIT 25
+
+#ifdef mBED1
+    #define R1A 10037
+    #define R1B 10056
+    #define R2A 10047
+    #define R2B 10012
+    #define R3A 10041
+    #define R3B 10048
+#else
+    #define R1A 10033
+    #define R1B 10023
+    #define R2A 9988
+    #define R2B 10036
+    #define R3A 10070
+    #define R3B 10067
+#endif
  
 Serial pc(USBTX, USBRX); // tx, rx
+DigitalOut buzzer(p22);
+LocalFileSystem local("local");
+
+float res_to_temp(float res);
+float volt_to_temp(int batteryA, float volt);
+float volt_to_res(int batteryA, float volt);
  
 int main() {
-    pc.printf("Hello World!\n");
-    while(1) {
-        pc.putc(pc.getc() + 1);
+    
+    char myname[64];
+    float voltageA = .0, voltageB = .0;
+    float tempA = .0, tempB = .0;
+    float resA = .0, resB = .0;
+    int i;
+    FILE *fp;
+    #ifdef mBED1
+        int mBed = 1;
+    #else
+        int mBed = 2;
+    #endif
+    
+    buzzer = 0;
+    
+    pc.printf("\n\n\n");
+    for (i = 0; i < 1000; i++) {
+        sprintf(myname, "/local/log%04d.csv", i);
+        pc.printf("Try file: <%s>\n", myname);    
+        if ((fp = fopen(myname, "r")) == 0) {
+            pc.printf("File not found: <%s>\n", myname);
+            break;
+        } else {
+            pc.printf("File exists: <%s>\n", myname);
+            fclose(fp);
+        }
     }
-}
\ No newline at end of file
+    
+    pc.printf("Creating File: <%s>\n", myname);
+    fp = fopen(myname, "w");   
+    fprintf(fp, "VA, resA, tempA, VB, resB, tempB\n");
+    
+    AnalogIn va1(p17);
+    AnalogIn va2(p18);
+    AnalogIn vb1(p19);
+    AnalogIn vb2(p20);
+    
+    DigitalIn run(p21);
+    
+    while(run) {
+        wait_ms(5000);
+        voltageA = (va1.read() - va2.read())*3.3;
+        voltageB = (vb1.read() - vb2.read())*3.3;
+        resA = volt_to_res(1, voltageA);
+        resB = volt_to_res(0, voltageB);
+        tempA = volt_to_temp(1, voltageA);
+        tempB = volt_to_temp(0, voltageB);
+        pc.printf("mBed%i: VA: %f, resA: %f, tempA: %f, VB: %f, resB: %f, tempB: %f\n", mBed, voltageA, resA, tempA-K, voltageB, resB, tempB-K);
+        fprintf(fp, "%f, %f, %f, %f, %f, %f\n", mBed, voltageA, resA, tempA-K, voltageB, resB, tempB-K);
+        
+        if(((tempA-K) > TEMP_LIMIT) || ((tempB-K) > TEMP_LIMIT)){
+            buzzer = 1;
+        }        
+    }
+    
+    fclose(fp); 
+    
+}
+
+float volt_to_temp(int batteryA, float volt){
+    float res = volt_to_res(batteryA, volt);
+    return res_to_temp(res);
+}
+
+float volt_to_res(int batteryA, float volt){
+    if(batteryA){
+        return R3A * ((VCC * R2A - volt * (R1A + R2A)) / (VCC * R1A + volt * (R1A + R2A)));
+    }else{
+        return R3B * ((VCC * R2B - volt * (R1B + R2B)) / (VCC * R1B + volt * (R1B + R2B)));
+    }
+}
+
+float res_to_temp(float Rt){
+    
+    return (B * T0) / (B + (T0 * log(Rt / R0)));
+    
+}
+