From 2b9367322d537a28f373d5338702aaf95fd1b842 Mon Sep 17 00:00:00 2001
From: Ross Owen <ross@xmos.com>
Date: Tue, 1 Dec 2015 13:10:28 +0000
Subject: [PATCH] Added build error if NUM_USB_CHAN_IN/OUT_FS >
 NUM_USB_CHAN_IN/OUT

---
 module_usb_audio/warnings.xc | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/module_usb_audio/warnings.xc b/module_usb_audio/warnings.xc
index e85973a6..5cbab76f 100644
--- a/module_usb_audio/warnings.xc
+++ b/module_usb_audio/warnings.xc
@@ -61,4 +61,13 @@ Warnings relating to configuration defines located in this XC source file rather
 #warning AUDIO_CLASS_FALLBACK not defined, using 0 (i.e. disabled)
 #endif
 
+/* Sanity check on FS channel counts */
+#if (NUM_USB_CHAN_OUT_FS > NUM_USB_CHAN_OUT)
+#error NUM_USB_CHAN_OUT expected to be less than or equal to NUM_USB_CHAN_OUT
+#endif
+
+#if (NUM_USB_CHAN_IN_FS > NUM_USB_CHAN_IN)
+#error NUM_USB_CHAN_IN expected to be less than or equal to NUM_USB_CHAN_IN
+#endif
+