From 77c3d5e2b669a01a94a9f183c75d69286783d5df Mon Sep 17 00:00:00 2001
From: Arkin Solomon <arkinsolomon@gmail.com>
Date: Wed, 2 Apr 2025 11:34:34 -0400
Subject: [PATCH] Allow overriding of default config (#92)

---
 src/rp2_common/pico_audio_pwm/audio_pwm.c     | 12 +++++-----
 .../pico_audio_pwm/include/pico/audio_pwm.h   | 24 +++++++++++++++++++
 2 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/src/rp2_common/pico_audio_pwm/audio_pwm.c b/src/rp2_common/pico_audio_pwm/audio_pwm.c
index 3a58011..d29d756 100644
--- a/src/rp2_common/pico_audio_pwm/audio_pwm.c
+++ b/src/rp2_common/pico_audio_pwm/audio_pwm.c
@@ -68,8 +68,8 @@ const audio_pwm_channel_config_t default_left_channel_config =
         {
                 .core = {
                         .base_pin = PICO_AUDIO_PWM_L_PIN,
-                        .pio_sm = 0,
-                        .dma_channel = 0
+                        .pio_sm = PICO_AUDIO_PWM_L_PIO_SM,
+                        .dma_channel = PICO_AUDIO_PWM_L_DMA_CH
                 },
                 .pattern = 1,
         };
@@ -78,8 +78,8 @@ const audio_pwm_channel_config_t default_right_channel_config =
         {
                 .core = {
                         .base_pin = PICO_AUDIO_PWM_R_PIN,
-                        .pio_sm = 1,
-                        .dma_channel = 1
+                        .pio_sm = PICO_AUDIO_PWM_R_PIO_SM,
+                        .dma_channel = PICO_AUDIO_PWM_R_DMA_CH,
                 },
                 .pattern = 1,
         };
@@ -88,8 +88,8 @@ const audio_pwm_channel_config_t default_mono_channel_config =
         {
                 .core = {
                         .base_pin = PICO_AUDIO_PWM_MONO_PIN,
-                        .pio_sm = 0,
-                        .dma_channel = 0
+                        .pio_sm = PICO_AUDIO_PWM_MONO_PIO_SM,
+                        .dma_channel = PICO_AUDIO_PWM_MONO_DMA_CH
                 },
                 .pattern = 3,
         };
diff --git a/src/rp2_common/pico_audio_pwm/include/pico/audio_pwm.h b/src/rp2_common/pico_audio_pwm/include/pico/audio_pwm.h
index 08d4f2b..decf1ff 100644
--- a/src/rp2_common/pico_audio_pwm/include/pico/audio_pwm.h
+++ b/src/rp2_common/pico_audio_pwm/include/pico/audio_pwm.h
@@ -84,14 +84,38 @@ extern "C" {
 #define PICO_AUDIO_PWM_L_PIN 0
 #endif
 
+#ifndef PICO_AUDIO_PWM_L_PIO_SM
+#define PICO_AUDIO_PWM_L_PIO_SM 0
+#endif
+
+#ifndef PICO_AUDIO_PWM_L_DMA_CH
+#define PICO_AUDIO_PWM_L_DMA_CH 0
+#endif
+
 #ifndef PICO_AUDIO_PWM_R_PIN
 #define PICO_AUDIO_PWM_R_PIN 1
 #endif
 
+#ifndef PICO_AUDIO_PWM_R_PIO_SM
+#define PICO_AUDIO_PWM_R_PIO_SM 0
+#endif
+
+#ifndef PICO_AUDIO_PWM_R_DMA_CH
+#define PICO_AUDIO_PWM_R_DMA_CH 1
+#endif
+
 #ifndef PICO_AUDIO_PWM_MONO_PIN
 #define PICO_AUDIO_PWM_MONO_PIN PICO_AUDIO_PWM_L_PIN
 #endif
 
+#ifndef PICO_AUDIO_PWM_MONO_PIO_SM
+#define PICO_AUDIO_PWM_MONO_PIO_SM PICO_AUDIO_PWM_L_PIO_SM
+#endif
+
+#ifndef PICO_AUDIO_PWM_MONO_DMA_CH
+#define PICO_AUDIO_PWM_MONO_DMA_CH PICO_AUDIO_PWM_L_DMA_CH
+#endif
+
 #ifndef PIO_AUDIO_PWM_INTERP_SAVE
 #define PIO_AUDIO_PWM_INTERP_SAVE 1
 #endif