Diff: main.cpp

Revision:

0:7185c344a97f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Dec 23 17:05:40 2018 +0000
@@ -0,0 +1,89 @@
+//Cecilia Schneider
+//OCE 360 HW #5 October 18,2018
+
+#include "mbed.h"
+#define mV_Volt 3300
+#define TMP36_calib 500
+
+Serial pc(USBTX, USBRX); //comms to host PC
+BusOut Seg1(p12,p13,p14,p15,p16,p17,p18,p19); // A,B,C,D,E,F,G,DP (tens place)
+BusOut Seg2(p21,p22,p23,p24,p25,p26,p27,p28); // A,B,C,D,E,F,G,DP (ones place)
+AnalogIn TMP36(p20); // temperature sensor input on p20
+DigitalIn s1(p11); // switch on p11
+
+char SegConvert(char SegValue); // function to convert a number to a 7-segment byte
+float temp = TMP36; // converts analog input to float
+int tempmV = (temp*(mV_Volt))-TMP36_calib; // float in volts to int in mV
+int tempC = tempmV / 10; // int in mV to degrees C
+
+int main()
+{
+    while (1) {
+        float temp1 = TMP36; //new analog input to float
+        int tempmV1 =(temp1*(mV_Volt))-TMP36_calib; // float (V) to int (mV)
+        int tempC1 = tempmV1 / 10; // int in mV to degrees C
+        int voltdiff = tempmV - tempmV1;
+        int tempdiff = tempC - tempC1;
+        
+        if (s1 == 1){
+            int ones = voltdiff % 10; // find the remainder for units column
+            int tens = voltdiff / 10; // find the remainder for tens column
+            Seg2=SegConvert(abs(ones)); // units column
+            Seg1=SegConvert(abs(tens)); // tens column
+            // Continuously Output to the Terminal
+            pc.printf("Original mV: %d \r\n",tempmV); 
+            pc.printf("New mV: %d \r\n",tempmV1); 
+            pc.printf("Difference mV: %d \r\n",voltdiff);
+            wait(1);
+        }
+        else {
+            int ones = tempdiff % 10; // find the remainder for units column
+            int tens = tempdiff / 10; // find the remainder for tens column
+            Seg2=SegConvert(abs(ones)); // units column
+            Seg1=SegConvert(abs(tens)); // tens column
+            // Continuously Output to the Terminal
+            pc.printf("Original Temp: %d \r\n",tempC); 
+            pc.printf("New Temp: %d \r\n",tempC1); 
+            pc.printf("Temp Diff: %d \r\n",tempdiff);
+            wait(1);
+        }
+
+    }
+}
+char SegConvert(char SegValue)   // function 'SegConvert'
+{
+    char SegByte=0x00;
+    switch (SegValue) {                // DPGFEDCBA
+        case 0 :
+            SegByte = 0xC0;
+            break; // 00111111 binary
+        case 1 :
+            SegByte = 0xF9;
+            break; // 00000110 binary
+        case 2 :
+            SegByte = 0xA4;
+            break; // 01011011 binary
+        case 3 :
+            SegByte = 0xB0;
+            break; // 01001111 binary
+        case 4 :
+            SegByte = 0x99;
+            break; // 01100110 binary
+        case 5 :
+            SegByte = 0x92;
+            break; // 01101101 binary
+        case 6 :
+            SegByte = 0x82;
+            break; // 01111101 binary
+        case 7 :
+            SegByte = 0xF8;
+            break; // 00000111 binary
+        case 8 :
+            SegByte = 0x80;
+            break; // 01111111 binary
+        case 9 :
+            SegByte = 0x90;
+            break; // 01101111 binary
+    }
+    return SegByte;
+}