Add crude ws2812b driver.

This driver can run lights! However it is very crude and does not
provide a great API. It does work though! Currently lights up 5 leds of
different colors.

Right now this does synchronous writes, which is not the best. It would
be better to be async, but I think that sholud not be a problem and will
shortly be done.

1 files changed, 13 insertions, 15 deletions

diff --git a/main/main.c b/main/main.c
index b4c744f..cffa6f5 100644
--- a/main/main.c
+++ b/main/main.c
@@ -5,6 +5,8 @@
 #include "esp_spi_flash.h"
 #include "driver/spi_master.h"
 
+#include "drv/ws2812b.h"
+
 #ifdef CONFIG_IDF_TARGET_ESP32
 #define LCD_HOST    HSPI_HOST
 
@@ -82,23 +84,19 @@ void app_main(void)
 
   printf("Configuration complete!!\n");
 
-  for (int i = 0; i < sizeof(buffer); ++ i) {
-    buffer[i] = 0xfa;
-  }
-
-  spi_transaction_t t = {0};
-  t.tx_buffer = buffer;
-  t.length = sizeof(buffer) * 8;
+  ws2812b_t* drv = ws2812b_init(spi);
+  ws2812b_buffer_t* buffer = ws2812b_new_buffer(5);
 
-  spi_transaction_t* rt;
+  ws2812b_buffer_set_rgb(buffer, 0, 255, 0, 0);
+  ws2812b_buffer_set_rgb(buffer, 1, 0, 255, 0);
+  ws2812b_buffer_set_rgb(buffer, 2, 0, 0, 255);
+  ws2812b_buffer_set_rgb(buffer, 3, 255, 255, 0);
+  ws2812b_buffer_set_rgb(buffer, 4, 255, 0, 255);
 
   while (1) {
-    error = spi_device_queue_trans(spi, &t, portMAX_DELAY);
-    assert(error == ESP_OK);
-    printf("SPI Transaction Equeued!!\n");
-
-    error = spi_device_get_trans_result(spi, &rt, portMAX_DELAY);
-    assert(error == ESP_OK);
-    printf("SPI Transaction Sent!!\n");
+    ws2812b_write_sync(drv, buffer);
+    // TODO(rahm) push this into the sync write, or otherwise make this better
+    // to deal with.
+    vTaskDelay(10 / portTICK_PERIOD_MS);
   }
 }