Add BGR byte order for WS2812 drivers (#11562)

* add byte order bgr for ws2812

* update docs for driver change

* Update ws2812_driver.md

* Update docs/ws2812_driver.md

Co-authored-by: Ryan <fauxpark@gmail.com>

Co-authored-by: Ryan <fauxpark@gmail.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/drivers/chibios/ws2812_pwm.c b/drivers/chibios/ws2812_pwm.c
index 3af922c06..140120d48 100644
--- a/drivers/chibios/ws2812_pwm.c
+++ b/drivers/chibios/ws2812_pwm.c
@@ -180,6 +180,43 @@
  * @return                          The bit index
  */
 #    define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 2, (bit))
+
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_BGR)
+/**
+ * @brief   Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given red bit
+ *
+ * @note    The red byte is the middle byte in the color packet
+ *
+ * @param[in] led:                  The led index [0, @ref RGBLED_NUM)
+ * @param[in] bit:                  The bit number [0, 7]
+ *
+ * @return                          The bit index
+ */
+#    define WS2812_RED_BIT(led, bit) WS2812_BIT((led), 2, (bit))
+
+/**
+ * @brief   Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given green bit
+ *
+ * @note    The red byte is the first byte in the color packet
+ *
+ * @param[in] led:                  The led index [0, @ref RGBLED_NUM)
+ * @param[in] bit:                  The bit number [0, 7]
+ *
+ * @return                          The bit index
+ */
+#    define WS2812_GREEN_BIT(led, bit) WS2812_BIT((led), 1, (bit))
+
+/**
+ * @brief   Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given blue bit
+ *
+ * @note    The red byte is the last byte in the color packet
+ *
+ * @param[in] led:                  The led index [0, @ref RGBLED_NUM)
+ * @param[in] bit:                  The bit index [0, 7]
+ *
+ * @return                          The bit index
+ */
+#    define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 0, (bit))
 #endif
 
 /* --- PRIVATE VARIABLES ---------------------------------------------------- */