FRA221_4449 / Mbed 2 deprecated MCP4922_Sinewave_4449

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Dependencies:   mbed

Fork of MCP4922_Sinewave by FRA221_2015

Files at this revision

API Documentation at this revision

Revision 4:1a2a74472be9, committed 2015-11-05

Comitter:
aimp
Date:
Thu Nov 05 08:02:26 2015 +0000
Parent:
3:863a9b7d417a
Commit message:
lab

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/main.cpp	Thu Nov 05 07:29:03 2015 +0000
+++ b/main.cpp	Thu Nov 05 08:02:26 2015 +0000
@@ -1,4 +1,3 @@
-
 #include "mbed.h"
 #include "MCP4922.h"
 
@@ -8,18 +7,29 @@
 /**** Main Function  ***/
 int main(void)
 {
-    MCP.frequency(1000000);
-    int i;
-    float a,y;
+    MCP.frequency(20000000);
+
+    uint16_t i=0;
+    uint8_t state=0;
     while(1) {
-          
-          
-                  for(a=1;a<=360;a++)
-                  { 
-                     y= sin(a*(6.28/360));
-                    MCP.writeA((y+1)*2000);
-               }
-               
-
+        if(i < 0x0FFF)
+        {
+            i++;
+            
+        }
+        else
+        {
+            i=0;
+            state = ~state;
+        }
+        
+        if(state ==0)
+        {
+            MCP.writeA(i);
+            }
+            else{
+           MCP.writeA( ((~i)+1)&0x0FFF);
+          }
+            wait_us(20);
     }
 }
\ No newline at end of file