Diff: main.cpp

Revision:

3:19bb7c30c354

Parent:

2:4834d4483ea6

Child:

4:b242f4206894

--- a/main.cpp	Mon Jul 23 17:34:47 2018 +0000
+++ b/main.cpp	Mon Jul 23 17:47:22 2018 +0000
@@ -22,7 +22,7 @@
 #endif
 
 // Parameter
-double drate = 1000.0;         // initial output rate (Hz)
+double drate = 440.0;         // initial output rate (Hz)
 const double refclk = 200000;  // Hz
 
 // Interruput
@@ -37,13 +37,21 @@
 //
 
 // param
+//   channel: 1 or 2
 //   val: 0 .. 4095
-void InternalDacWrite(uint16_t val)
+void InternalDacWrite(int ch, uint16_t val)
 {
     // avoid distortion of built-in DAC
     uint16_t v = ((val + 1024) << 3);
     
-    Dac2.write_u16(v);
+    switch(ch) {
+    case 1:
+        Dac1.write_u16(v);
+        break;
+    case 2:
+        Dac2.write_u16(v);
+        break;
+    }
 }
 
 void update()
@@ -55,7 +63,8 @@
     phaccu = phaccu + tword_m;
     uint16_t idx = phaccu >> 17;  // use upper 15 bits
     
-    InternalDacWrite(sin_12bit_32k[idx]);
+    InternalDacWrite(1, sin_12bit_32k[idx]);
+    InternalDacWrite(2, sin_12bit_32k[idx]);
 
 #if (PIN_CHECK)
     CheckPin.write(0);