Fix: add missing led.h

Refs: #14

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 ".")

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();
 }

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));
+}

src/main/led.h

@@ -0,0 +1,7 @@
+#ifndef LED_H_
+#define LED_H_
+
+/* Configuration and initialization of ledc driver */
+void ledc_init(void);
+
+#endif