Diff: main.cpp

Revision:

0:63b7102aab3e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Sep 19 13:18:12 2012 +0000
@@ -0,0 +1,85 @@
+#include "mbed.h"
+#include "sinelookup.h"
+#include "TLV320.h"
+#include "I2S.h"
+
+#define SAMPLERATE 48000
+
+
+TLV320 codec(p9, p10);
+I2S i2s(I2S_TRANSMIT, p5, p6, p7);
+
+AnalogIn aIn(p19);
+AnalogIn vol(p20);
+
+float phase_l;
+float phase_r;
+int minibuf[16];
+float skipper;
+float volume;
+float phase_kill;
+
+
+extern "C" void HardFault_Handler()
+{
+    error("Hard Fault!\n");
+}
+
+
+void play(void)
+{   
+    int to_write = i2s.max_fifo_points() - (i2s.fifo_points());
+    for(int i = 0; i < to_write; i+=2) {
+        minibuf[i] = int(float(sine16lookup[int(phase_l)])*volume);
+        //minibuf[i] = int(sine16lookup[int(phase_l)]);
+        minibuf[i+1] = int(float(sine16lookup[int(phase_r)])*volume);
+        phase_l+=skipper;
+        phase_r = phase_l + phase_kill;
+        while(phase_l >= SINE16LENGTH) {
+            phase_l -= SINE16LENGTH;
+        }
+        
+        while(phase_r >= SINE16LENGTH) {
+            phase_r -= SINE16LENGTH;
+        }
+        while(phase_r< 0) phase_r += SINE16LENGTH;
+    }
+    i2s.write(minibuf, to_write);
+}
+
+/* main */
+int main()
+{
+    skipper = (aIn*49)+1;
+    
+    codec.power(true);
+    codec.frequency(SAMPLERATE);
+    codec.wordsize(16);  
+    codec.master(false);
+    codec.headphone_volume(0.5);
+    codec.start();
+    
+    i2s.frequency(SAMPLERATE);
+    i2s.wordsize(16);
+    i2s.stereomono(I2S_STEREO);
+    i2s.masterslave(I2S_MASTER);
+    i2s.attach(&play);
+    i2s.start();
+    
+    while(1)
+    {
+        skipper = (aIn*30)+1;
+
+        volume = 1;
+        phase_kill = (vol-0.5)*400;
+
+        //printf("Skipper:%f, %i, %i\n\r",skipper, to_write,i2s.fifo_level());
+        
+        /*if(flag)
+        {
+        printf(".");
+        flag = false;
+        }*/
+    }
+
+}
\ No newline at end of file