From c4cc897319f4edfe6b16552ba747d071aef39598 Mon Sep 17 00:00:00 2001
From: Stephen Crane <jscrane@gmail.com>
Date: Sun, 25 Nov 2018 13:21:05 +0000
Subject: [PATCH] warn if no sound configured

---
 sound_dac.cpp | 2 ++
 sound_pwm.cpp | 6 ++++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/sound_dac.cpp b/sound_dac.cpp
index 975c562..06fd796 100644
--- a/sound_dac.cpp
+++ b/sound_dac.cpp
@@ -55,6 +55,8 @@ const uint8_t *DAC::play(const uint8_t *bytes, unsigned size) {
 }
 
 #else
+#pragma message "No DAC"
+
 // does nothing by default
 void DAC::begin(unsigned channel, unsigned freq) {
 }
diff --git a/sound_pwm.cpp b/sound_pwm.cpp
index d032880..f4d4972 100644
--- a/sound_pwm.cpp
+++ b/sound_pwm.cpp
@@ -2,7 +2,7 @@
 #include "sound_pwm.h"
 #include "hardware.h"
 
-#if defined(ESP32)
+#if defined(PWM_SOUND) && defined(ESP32)
 #include <driver/ledc.h>
 
 #define CHANNEL		LEDC_CHANNEL_0
@@ -40,7 +40,7 @@ void PWM::set_freq(unsigned freq) {
       ESP_ERROR_CHECK(::ledc_set_freq(SPEED_MODE, TIMER, freq));
 }
 
-#elif defined(ESP8266)
+#elif defined(PWM_SOUND) && defined(ESP8266)
 #include <core_esp8266_waveform.h>
 
 static unsigned gpio, duty;
@@ -66,6 +66,8 @@ void PWM::set_freq(unsigned freq) {
 }
 
 #else
+#pragma message "No PWM"
+
 void PWM::begin(unsigned gpio) {
 }