Digital B14 / Mbed 2 deprecated MCP4922_Sinewave

Lab Week 11 (Sine Wave)

Dependencies:   mbed

Fork of MCP4922_Sinewave by FRA221_2015

Files at this revision

API Documentation at this revision

Revision 3:095b3ca4c0f9, committed 2015-11-16

Comitter:
ParinyaT
Date:
Mon Nov 16 19:45:38 2015 +0000
Parent:
2:2244c8986987
Commit message:
Lab week 11 (sine wave)

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/main.cpp	Mon Aug 24 12:36:59 2015 +0000
+++ b/main.cpp	Mon Nov 16 19:45:38 2015 +0000
@@ -2,35 +2,24 @@
 #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);
+    MCP.frequency(1000000);
 
-    uint16_t i=0;
-    uint8_t state=0;
-    while(1) {
-        if(i < 0x0FFF)
-        {
-            i++;
-            
-        }
-        else
-        {
-            i=0;
-            state = ~state;
-        }
-        
-        if(state ==0)
-        {
+    int16_t i=0;
+    int T=0;
+    while(1) 
+    {
+            i = 0x07FF*sin(0.1*T);
+            i = i+0x07FF;
+            T++;
+
             MCP.writeA(i);
-            }
-            else{
-           MCP.writeA( ((~i)+1)&0x0FFF);
-          }
             wait_us(20);
     }
 }
\ No newline at end of file