Diff: main.cpp

Revision:

0:fdec2a8ac3b2

Child:

1:d6a4b42d6188

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Oct 28 12:20:54 2014 +0000
@@ -0,0 +1,62 @@
+#include "mbed.h"
+#include "FastPWM.h"
+#include "atmegatron.h"
+
+
+uint32_t sample_rate = 64000;
+FastPWM audio1(PTD1,1);
+FastPWM audio2(PTD3,1);
+
+Ticker tick;
+DigitalOut led_green(PTE24);
+DigitalOut led_red(PTB19);
+
+DigitalIn encoder1_a(PTA0); // phase A
+DigitalIn encoder1_b(PTE27); // phase B
+DigitalIn encoder1_k(PTD2); // integrated pushbutton
+
+DigitalIn encoder2_a(PTC4); // phase A
+DigitalIn encoder2_b(PTE25); // phase B
+DigitalIn encoder2_k(PTD0); // integrated pushbutton
+
+AnalogIn pot2(A5);
+AnalogIn pot3(A4);
+AnalogIn pot4(A3);
+AnalogIn pot5(A2);
+AnalogIn pot6(A1);
+AnalogIn pot7(A0);
+
+
+int main(void)
+{
+    // Systick at 1 kHz.
+    tick.attach_us(&SysTick_Handler,1000); 
+
+    // Setup PWM.
+    audio1.period_us(1000000.0/sample_rate);
+    audio1.pulsewidth_us(0.5*1000000.0/sample_rate); // 50%
+    audio2.period_us(1000000.0/sample_rate);
+    audio2.pulsewidth_us(0.5*1000000.0/sample_rate); // 50%
+    
+    // Setup rotary encoders.
+    encoder1_a.mode(PullUp);
+    encoder1_b.mode(PullUp);
+    encoder1_k.mode(PullUp);
+    encoder2_a.mode(PullUp);
+    encoder2_b.mode(PullUp);
+    encoder2_k.mode(PullUp);
+    
+    // Initialize random number generator.
+    randomSeed(0); // TODO: find a better seed.
+
+    // Sound engin setup.
+    setup();
+    
+    while (true) 
+    {
+        loop_priority_low();
+        // The idea is to call loop_priority_high from the systick ISR to
+        // fix the sample calculation rate at a known value (1 kHz).
+        //loop_priority_high();
+    }
+}