Very early cut of xua_lite app. Builds (4 threads + I2C) but not functional

examples/xua_lite_example/src/audio_hub.xc

@@ -0,0 +1,44 @@
+#include "i2s.h"
+#include "i2c.h"
+#include "gpio.h"
+#include "xua.h"
+
+[[distributable]]
+void AudioHub(server i2s_frame_callback_if i2s,
+                  chanend c_aud,
+                  client i2c_master_if i2c,
+                  client output_gpio_if dac_reset)
+{
+  int32_t samples[8] = {0}; // Array used for looping back samples
+  while (1) {
+    select {
+    case i2s.init(i2s_config_t &?i2s_config, tdm_config_t &?tdm_config):
+      i2s_config.mode = I2S_MODE_I2S;
+      i2s_config.mclk_bclk_ratio = (MCLK_48/DEFAULT_FREQ)/64;
+
+      // Set CODECs in reset
+      dac_reset.output(0);
+
+      // Allow reset to assert
+      delay_milliseconds(1);
+
+      // Take CODECs out of reset
+      dac_reset.output(1);
+
+      //reset_codecs(i2c);
+      break;
+
+    case i2s.receive(size_t n_chans, int32_t in_samps[n_chans]):
+    for (int i = 0; i < n_chans; i++) samples[i] = in_samps[i]; // copy samples
+      break;
+
+    case i2s.send(size_t n_chans, int32_t out_samps[n_chans]):
+      for (int i = 0; i < n_chans; i++) out_samps[i] = samples[i]; // copy samples
+      break;
+
+    case i2s.restart_check() -> i2s_restart_t restart:
+      restart = I2S_NO_RESTART; // Keep on looping
+      break;
+    }
+  }
+}