Teerapong Apiraungpituk / Mbed 2 deprecated MCP4922_Sinewave_p

lab sine wave

Dependencies:   mbed

Fork of MCP4922_Sinewave by FRA221_2015

Files at this revision

API Documentation at this revision

Revision 3:a4a98380e07b, committed 2015-11-16

Comitter:
57340500039
Date:
Mon Nov 16 13:51:42 2015 +0000
Parent:
2:2244c8986987
Commit message:
test

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
diff -r 2244c8986987 -r a4a98380e07b main.cpp
--- a/main.cpp	Mon Aug 24 12:36:59 2015 +0000
+++ b/main.cpp	Mon Nov 16 13:51:42 2015 +0000
@@ -1,17 +1,15 @@
 
 #include "mbed.h"
 #include "MCP4922.h"
-
 MCP4922 MCP(SPI_MOSI, SPI_SCK,SPI_CS);  // MOSI, SCLK, CS
 
 
 /**** Main Function  ***/
 int main(void)
 {
-    MCP.frequency(20000000);
-
-    uint16_t i=0;
-    uint8_t state=0;
+    MCP.frequency(1000000);
+    
+    uint16_t i=0,sent=0;
     while(1) {
         if(i < 0x0FFF)
         {
@@ -21,16 +19,11 @@
         else
         {
             i=0;
-            state = ~state;
         }
+        sent = (int) (sin((double)(i)*(3.14/2047.0))*2047);
         
-        if(state ==0)
-        {
-            MCP.writeA(i);
-            }
-            else{
-           MCP.writeA( ((~i)+1)&0x0FFF);
-          }
-            wait_us(20);
+        MCP.writeA(2047+sent);  
+            
+        wait_us(20);
     }
-}
\ No newline at end of file
+}