Diff: SignalProcessing.cpp

Revision:

2:3771b3195c7b

Child:

3:a85b742be262

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SignalProcessing.cpp	Thu Oct 29 17:15:20 2015 +0000
@@ -0,0 +1,23 @@
+
+
+#define pre_compute_length 4000
+#define DMA_PERIOD .00001
+#define DMA_FREQUENCY 100000
+#define CARRIERFREQUENCY 10000
+float i_mod_pre[pre_compute_length];
+float q_mod_pre[pre_compute_length];
+int out_val_pre[pre_compute_length]; 
+
+float twopi = 3.14159265359 * 2;
+
+void pre_compute_tables() {
+  /*
+  // This function will precompute the cos and sin tables used in the rest of the program
+  for(int precompute_counter = 0; precompute_counter < pre_compute_length; precompute_counter++){
+    out_val_pre[precompute_counter] = (int) (cos(twopi * CarrierFrequency * DMA_PERIOD * precompute_counter) * 4965.0 + 49650.0);
+    i_mod_pre[precompute_counter] = (cos(twopi * CarrierFrequency * TimerInterruptInMicroSeconds * 1e-6 * precompute_counter));
+    q_mod_pre[precompute_counter] = (-sin(twopi * CarrierFrequency * TimerInterruptInMicroSeconds * 1e-6 * precompute_counter));
+    
+  }
+  */
+}
\ No newline at end of file