From 12aa3a714a3479ecb141b03eba751546108cbc70 Mon Sep 17 00:00:00 2001
From: rkcf <rkcf@rkcf.me>
Date: Sat, 25 Feb 2023 04:30:45 -0600
Subject: [PATCH] Feat: add ledc driver initialization

Refs: #14
---
 src/main/CMakeLists.txt           |  2 +-
 src/main/esp32_eurorack_generic.c |  5 ++-
 src/main/led.c                    | 54 +++++++++++++++++++++++++++++++
 3 files changed, 59 insertions(+), 2 deletions(-)
 create mode 100644 src/main/led.c

diff --git a/src/main/CMakeLists.txt b/src/main/CMakeLists.txt
index b48d63e..113bbe9 100644
--- a/src/main/CMakeLists.txt
+++ b/src/main/CMakeLists.txt
@@ -1,2 +1,2 @@
-idf_component_register(SRCS "esp32_eurorack_generic.c"
+idf_component_register(SRCS "esp32_eurorack_generic.c" "led.c"
                     INCLUDE_DIRS ".")
diff --git a/src/main/esp32_eurorack_generic.c b/src/main/esp32_eurorack_generic.c
index 7b66f33..b420cae 100644
--- a/src/main/esp32_eurorack_generic.c
+++ b/src/main/esp32_eurorack_generic.c
@@ -1,6 +1,9 @@
 #include <stdio.h>
 
+#include "led.h"
+
 void app_main(void)
 {
-
+  /* Initialize LEDC driver */
+  ledc_init();
 }
diff --git a/src/main/led.c b/src/main/led.c
new file mode 100644
index 0000000..c3195b1
--- /dev/null
+++ b/src/main/led.c
@@ -0,0 +1,54 @@
+#include <stdio.h>
+
+#include "esp_log.h"
+#include "esp_err.h"
+#include "driver/ledc.h"
+#include "hal/ledc_types.h"
+
+/* Rotary Encoder LED Pins */
+#define R1B_PIN 18 /* Rotary Encoder 1 Blue Pin */
+#define R1G_PIN 8 /* Rotary Encoder 1 Green Pin */
+#define R2B_PIN 45 /* Rotary Encoder 2 Blue Pin */
+#define R2G_PIN 0 /* Rotary Encoder 2 Green Pin */
+
+static const char *TAG = "ledc";
+
+
+void ledc_init(void)
+{
+  ESP_LOGI(TAG, "Initializing LEDC driver");
+
+  /* Configure and initialize ledc PWM timer */
+  ledc_timer_config_t timer_config = {
+    .speed_mode = LEDC_LOW_SPEED_MODE,
+    .timer_num = LEDC_TIMER_0,
+    .duty_resolution = LEDC_TIMER_12_BIT,
+    .clk_cfg = LEDC_AUTO_CLK,
+    .freq_hz = 5000
+  };
+  ESP_ERROR_CHECK(ledc_timer_config(&timer_config));
+
+  /* Configure Rotary Encoder 1 B chan */
+  ledc_channel_config_t R1B_config = {
+    .channel = LEDC_CHANNEL_0,
+    .gpio_num = R1B_PIN,
+    .speed_mode = LEDC_LOW_SPEED_MODE,
+    .timer_sel = LEDC_TIMER_0,
+    .intr_type = LEDC_INTR_DISABLE,
+    .duty = 2048,
+    .hpoint = 0
+  };
+  ESP_ERROR_CHECK(ledc_channel_config(&R1B_config));
+
+  /* Configure Rotary Encoder 1 G chan */
+  ledc_channel_config_t R1G_config = {
+    .channel = LEDC_CHANNEL_1,
+    .gpio_num = R1G_PIN,
+    .speed_mode = LEDC_LOW_SPEED_MODE,
+    .timer_sel = LEDC_TIMER_0,
+    .intr_type = LEDC_INTR_DISABLE,
+    .duty = 2048,
+    .hpoint = 0
+  };
+  ESP_ERROR_CHECK(ledc_channel_config(&R1G_config));
+}