Revision 1:cad368af277b, committed 2016-10-09

Comitter:

eddienuel

Date:

Sun Oct 09 01:45:12 2016 +0000

Parent:

0:79c0c4cd1ab3

Commit message:

implemented auto calibration

Changed in this revision

--- a/main.cpp	Mon Aug 15 03:58:02 2016 +0000
+++ b/main.cpp	Sun Oct 09 01:45:12 2016 +0000
@@ -1,18 +1,70 @@
 #include "mbed.h"
 
+
+float _scale;
 DigitalOut myled(LED_BLUE);
+
+DigitalIn HX_DOUT(PTC3);
+DigitalOut HX_PD_SCK(PTC5);
+
 Serial pc(USBTX, USBRX);
+long offset = 0;
+long ReadWeight(void);
+//double getGram();
+uint16_t getGram();
+long getAverageValue(int times);
 
 int main()
 {
+    offset = getAverageValue(20);
     int i = 0;
     pc.printf("Hello World!\n");
-
     while (true) {
         wait(0.5f); // wait a small period of time
-        pc.printf("%d \n", i); // print the value of variable i
+        pc.printf("%d \n", getGram()); // print the value of variable i
         i++; // increment the variable
         myled = !myled; // toggle a led
     }
 }
 
+long ReadWeight(void)
+{
+        long Count;
+        unsigned char i;
+        HX_PD_SCK.write(0);
+        Count = 0;
+        while(HX_DOUT.read() == 1);
+        for (i=0;i<24;i++)
+        {
+                HX_PD_SCK.write(1);
+                Count=Count<<1;
+                HX_PD_SCK.write(0);
+                if(HX_DOUT.read() == 1) Count++;
+        }
+        HX_PD_SCK.write(1);
+        Count=Count^0x800000;
+        HX_PD_SCK.write(0);
+        return(Count);
+}
+
+//double getGram(){
+//    return ((getAverageValue(20) - offset)*0.0000407059);//8409088
+//    //return getAverageValue(20);// - offset)*0.00793457031);//8409088
+//
+//}
+
+uint16_t getGram(){
+    return ((getAverageValue(20) - offset))/1000;//*0.0000407059);//8409088
+    //return getAverageValue(20);// - offset)*0.00793457031);//8409088
+
+}
+
+long getAverageValue(int times){
+    long sum = 0;
+    for (int i = 0; i < times; i++)
+    {
+        sum += ReadWeight();
+    }
+    return sum / times;
+}
+