From 392aed44a06d27887c3404261942913157cd8f38 Mon Sep 17 00:00:00 2001
From: Ross Owen <ross@xmos.com>
Date: Tue, 15 Sep 2015 15:02:04 +0100
Subject: [PATCH] Initial changes for PDM outline

---
 module_usb_audio/audio.xc | 10 ++++++++++
 module_usb_audio/main.xc  | 24 +++++++++++++++++++++++-
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/module_usb_audio/audio.xc b/module_usb_audio/audio.xc
index 30e705ee..2d1f36db 100755
--- a/module_usb_audio/audio.xc
+++ b/module_usb_audio/audio.xc
@@ -433,6 +433,10 @@ unsigned static deliver(chanend c_out, chanend ?c_spd_out,
 #if(defined(SPDIF_RX) || defined(ADAT_RX))
     chanend c_dig_rx,
 #endif
+#ifdef PDM_PCM_IN
+    streaming chanend c_pdm_pcm,
+#endif
+
     chanend ?c_adc)
 {
 
@@ -924,6 +928,9 @@ chanend ?c_config, chanend ?c
 #if XUD_TILE != 0
 , server interface i_dfu dfuInterface
 #endif
+#ifdef PDM_PCM_IN
+, streaming chanend c_pdm_in
+#endif
 )
 {
 #if defined (SPDIF_TX) && (SPDIF_TX_TILE == AUDIO_IO_TILE)
@@ -1190,6 +1197,9 @@ chanend ?c_config, chanend ?c
                    divide, curSamFreq,
 #if defined (ADAT_RX) || defined (SPDIF_RX)
                    c_dig_rx,
+#endif
+#ifdef PDM_PCM_IN
+                   c_pdm_in,
 #endif
                    c);
 
diff --git a/module_usb_audio/main.xc b/module_usb_audio/main.xc
index a73b8150..a6bba8d0 100755
--- a/module_usb_audio/main.xc
+++ b/module_usb_audio/main.xc
@@ -43,6 +43,8 @@
 
 #include "clocking.h"
 
+void genclock();
+
 [[distributable]]
 void DFUHandler(server interface i_dfu i, chanend ?c_user_cmd);
 
@@ -262,6 +264,14 @@ void xscope_user_init()
 }
 #endif
 
+#ifdef PDM_PCM_IN
+void dummy_pdm_code(streaming chanend c)
+{
+    while(1)
+        c <: 0xff00ff00;
+}
+#endif
+
 /* Core USB Audio functions - must be called on the Tile connected to the USB Phy */
 void usb_audio_core(chanend c_mix_out
 #ifdef MIDI
@@ -416,6 +426,10 @@ void usb_audio_io(chanend c_aud_in, chanend ?c_adc,
     #define c_dig_rx null
 #endif
 
+#ifdef PDM_PCM_IN
+    streaming chan c_pdm_pcm
+#endif
+
     par
     {
 #ifdef MIXER
@@ -442,7 +456,10 @@ void usb_audio_io(chanend c_aud_in, chanend ?c_adc,
 #endif
                 c_aud_cfg, c_adc
 #if XUD_TILE != 0
-                ,dfuInterface
+                , dfuInterface
+#endif
+#ifdef PDM_PCM_IN
+                , c_pdm_pcm
 #endif
             );
         }
@@ -455,6 +472,11 @@ void usb_audio_io(chanend c_aud_in, chanend ?c_adc,
 
         }
 #endif
+
+#ifdef PDM_PCM_IN
+        dummy_pdm_code(c_pdm_pcm);
+#endif
+
         //:
     }
 }