led driver

main/drivers/leds.cpp

@@ -1,7 +1,27 @@
 #include "leds.h"
 
+led_strip_handle_t leds;
 
+void init_leds(void) {
+    led_strip_config_t strip_config = {
+        .strip_gpio_num = NEOPIXEL_PIN,
+        .max_leds = PIXEL_COUNT,
+        .led_pixel_format = LED_PIXEL_FORMAT_GRB,
+        .led_model = LED_MODEL_WS2812
+    };
 
-#define PIXEL_COUNT 21
-#define NEOPIXEL_PIN GPIO_NUM_7
+    led_strip_rmt_config_t rmt_config = {
+        .clk_src = RMT_CLK_SRC_DEFAULT,
+        .resolution_hz = LED_STRIP_RMT_RES_HZ,
+    };
+    rmt_config.flags.with_dma = false;
 
+    ESP_ERROR_CHECK(led_strip_new_rmt_device(&strip_config, &rmt_config, &leds));
+}
+
+void example_leds(void) {
+    for (int i = 0; i < PIXEL_COUNT; i++) {
+        ESP_ERROR_CHECK(led_strip_set_pixel(leds, i, i, PIXEL_COUNT-i, 0));
+    }
+    ESP_ERROR_CHECK(led_strip_refresh(leds));
+}

main/drivers/leds.h

@@ -1,5 +1,20 @@
 #ifndef LEDS_H
 #define LEDS_H
 
+#include "led_strip.h"
+
+#define PIXEL_COUNT 21
+#define NEOPIXEL_PIN GPIO_NUM_7
+// 10MHz resolution, 1 tick = 0.1us (led strip needs a high resolution)
+#define LED_STRIP_RMT_RES_HZ  (10 * 1000 * 1000)
+
+extern led_strip_handle_t leds;
+
+typedef enum {
+
+} Led;
+
+void init_leds(void);
+void example_leds(void);
 
 #endif /* LEDS_H */