From 48e30b3030dcde8f4016d080b0f3f868c4a08d8e Mon Sep 17 00:00:00 2001
From: JohSchneider <JohSchneider@googlemail.com>
Date: Thu, 14 May 2020 03:24:47 +0000
Subject: [PATCH] Audio enable corrections (Part 4) (#8974)

* audio-configuration: throw a compile error on AUDIO_ENABLE=yes with no output pin configured

relevant for avr boards, arm currently implicitly uses A4/A5

* audio-configuration: add Changelog entry

* audio-configuration: remove stray newline
---
 docs/ChangeLog/20200530/PR8974.md | 2 ++
 quantum/audio/audio_avr.c         | 5 +++++
 2 files changed, 7 insertions(+)
 create mode 100644 docs/ChangeLog/20200530/PR8974.md

diff --git a/docs/ChangeLog/20200530/PR8974.md b/docs/ChangeLog/20200530/PR8974.md
new file mode 100644
index 000000000000..269636d1b1be
--- /dev/null
+++ b/docs/ChangeLog/20200530/PR8974.md
@@ -0,0 +1,2 @@
+## fixing wrong configuration of AUDIO feature
+add a compile-time error to alert the user to a missing pin-configuration (on AVR boards) when AUDIO_ENABLE=yes is set
diff --git a/quantum/audio/audio_avr.c b/quantum/audio/audio_avr.c
index 781378788c63..5a96bf64393c 100644
--- a/quantum/audio/audio_avr.c
+++ b/quantum/audio/audio_avr.c
@@ -110,6 +110,11 @@
 #    define TIMER_1_DUTY_CYCLE OCR1C
 #    define TIMER1_AUDIO_vect TIMER1_COMPC_vect
 #endif
+
+#if !defined(BPIN_AUDIO) && !defined(CPIN_AUDIO)
+#    error "Audio feature enabled, but no suitable pin selected - see docs/feature_audio.md under the AVR settings for available options."
+#endif
+
 // -----------------------------------------------------------------------------
 
 int   voices        = 0;