Refactor: Separate XUA lite and app code

examples/xua_lite_example/src/audio_hub.xc

@@ -8,6 +8,7 @@
 #include "mic_array.h"
 #include "audio_config.h"
 #include "pdm_mic.h"
+#include "xua_buffer_lite.h"
 
 //Globally declared for 64b alignment
 int mic_decimator_fir_data_array[8][THIRD_STAGE_COEFS_PER_STAGE * PDM_MAX_DECIMATION] = {{0}};
@@ -35,8 +36,6 @@ void AudioHub(server i2s_frame_callback_if i2s,
   mic_array_decimator_configure(c_ds_output, decimatorCount, dc);
   mic_array_init_time_domain_frame(c_ds_output, decimatorCount, buffer, mic_audio_frame, dc);
 
-  UserBufferManagementInit();
-
   // Used for debug
   //int saw = 0;
 
@@ -63,12 +62,7 @@ void AudioHub(server i2s_frame_callback_if i2s,
       restart = I2S_NO_RESTART; // Keep on looping
       timer tmr; int t0, t1; tmr :> t0;
 
-      UserBufferManagement((unsigned *) raw_mics, (unsigned *) samples_out);
-
-      //Transfer samples. Takes about 25 ticks
-      for (int i = 0; i < NUM_USB_CHAN_OUT; i++) c_audio :> samples_out[i];
-      if (XUA_ADAPTIVE) c_audio :> clock_nudge;
-      for (int i = 0; i < NUM_USB_CHAN_IN; i++) c_audio <: raw_mics[i];
+      XUA_transfer_samples(c_audio, (unsigned *) samples_out, (unsigned *) raw_mics, (clock_nudge, int));
 
       //Grab mics. Takes about 200 ticks currently
       current = mic_array_get_next_time_domain_frame(c_ds_output, decimatorCount, buffer, mic_audio_frame, dc);

examples/xua_lite_example/wscript

@@ -9,7 +9,7 @@ def configure(conf):
 
 def build(bld):
 	target_path = 'bin/' + bld.options.target
-	bld.env.TARGET_ARCH ='src/RPI_HAT_60QFN.xn'
+	bld.env.TARGET_ARCH ='config/RPI_HAT_60QFN.xn'
 	bld.env.XSCOPE = bld.path.find_resource('config.xscope')
 	depends_on = ['lib_xua','lib_i2s','lib_xud','lib_mic_array', 'lib_i2c']
 	#bld.env.XCC_FLAGS = ['-O2', '-g', '-Wall', '-fcmdline-buffer-bytes=512', '-report', '-DDISABLE_STAGE_C']
@@ -20,5 +20,7 @@ def build(bld):
 	if bld.options.debug:
 		bld.env.XCC_FLAGS.append('-DDEBUG')
 
-	source = bld.path.ant_glob(['src/**/*.xc', 'src/**/*.c'])
-	bld.program(source=source, depends_on=depends_on,target=target_path)
+	source = bld.path.ant_glob(['src/**/*.xc', 'src/**/*.c',
+                                    'xua_lite/**/*.xc', 'xua_lite/**/*.c'])
+        includes = ['config']
+	bld.program(source=source, includes=includes, depends_on=depends_on,target=target_path)

examples/xua_lite_example/xua_lite/xua_buffer_lite.h

@@ -22,4 +22,14 @@
 
 unsafe void XUA_Buffer_lite(chanend c_ep0_out, chanend c_ep0_in, chanend c_aud_out, chanend ?c_feedback, chanend c_aud_in, chanend c_sof, in port p_for_mclk_count, streaming chanend c_audio_hub);
 [[combinable]]
-unsafe void XUA_Buffer_lite2(server ep0_control_if i_ep0_ctl, chanend c_aud_out, chanend ?c_feedback, chanend c_aud_in, chanend c_sof, in port p_for_mclk_count, streaming chanend c_audio_hub);
+unsafe void XUA_Buffer_lite2(server ep0_control_if i_ep0_ctl, chanend c_aud_out, chanend ?c_feedback, chanend c_aud_in, chanend c_sof, in port p_for_mclk_count, streaming chanend c_audio_hub);
+
+static inline void XUA_transfer_samples(streaming chanend c_audio,
+                                        unsigned sampsFromUsbToAudio[],
+                                        unsigned sampsFromAudioToUsb[],
+                                        int &clock_nudge) {
+    //Transfer samples. Takes about 25 ticks
+    for (int i = 0; i < NUM_USB_CHAN_OUT; i++) c_audio :> sampsFromUsbToAudio[i];
+    if (XUA_ADAPTIVE) c_audio :> clock_nudge;
+    for (int i = 0; i < NUM_USB_CHAN_IN; i++) c_audio <: sampsFromAudioToUsb[i];
+}