Diff: main.cpp

Revision:

0:b3cb4a71da01

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Oct 20 14:23:48 2011 +0000
@@ -0,0 +1,62 @@
+#include "mbed.h"
+#include "TextLCD.h"
+
+TextLCD mylcd(p24, p26, p27, p28, p29, p30); // rs, e, d4-d7
+
+volatile int n;
+int Raw_data[52];
+
+DigitalOut REQUEST(p20);
+DigitalIn DATA(p9);
+InterruptIn CLOCK(p17);
+
+void trigger() {                    //interrupt  when CLOCK falled 
+    Raw_data[n] = DATA.read();
+    n++;
+}
+
+
+int main() {
+    int Y;              
+    int Measured_Data[6];
+    int Decimal_point;
+    double temp_data , Indicate;
+
+ while(1){
+    wait(0.03);
+    n=0;
+
+    REQUEST.write(1);
+    CLOCK.fall(&trigger);
+
+    while(1){
+        if(n>52) break;         //number of data 
+    }
+
+    CLOCK.fall(NULL);
+    REQUEST.write(0);
+
+    Y=20;
+    for(int i=0;i<=5;i++){          //Raw_data[20]-[43] is Measured_Data
+        Measured_Data[i] =  Raw_data[Y+3]*pow(2.0,3) + Raw_data[Y+2]*pow(2.0,2) + Raw_data[Y+1]*pow(2.0,1) + Raw_data[Y];
+        Y=Y+4;
+    }
+
+    Decimal_point =  Raw_data[Y+3]*pow(2.0,3)+ Raw_data[Y+2]*pow(2.0,2) +Raw_data[Y+1]*pow(2.0,1)+ Raw_data[Y];     ///Raw_data[44]-[47] is Decimal_point
+   
+    temp_data  = Measured_Data[0]*100000 + Measured_Data[1]*10000 + Measured_Data[2]*1000 + Measured_Data[3]*100 + Measured_Data[4]*10 + Measured_Data[5];
+ 
+    if (Raw_data[19]==1)                //19 is Sign. 0 is '+'  ,  1 is '-'
+        temp_data  = -1* temp_data;
+
+    Indicate = temp_data /pow(10.0,Decimal_point);
+
+    mylcd.cls();
+    mylcd.printf("%7.2f", Indicate);
+   
+    if(Raw_data[48]==0)
+        mylcd.printf("mm");
+    else
+        mylcd.printf("inch");
+ }
+}