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>

docs/ws2812_driver.md

@@ -33,10 +33,11 @@ The default setting is 280 µs, which should work for most cases, but this can b
 Some variants of the WS2812 may have their color components in a different physical or logical order. For example, the WS2812B-2020 has physically swapped red and green LEDs, which causes the wrong color to be displayed, because the default order of the bytes sent over the wire is defined as GRB.
 In this case, you can change the byte order by defining `WS2812_BYTE_ORDER` as one of the following values:
 
-| Byte order                        | Known devices                 |
-|-----------------------------------|-------------------------------|
-| `WS2812_BYTE_ORDER_GRB` (default) | Most WS2812's, SK6812, SK6805 |
-| `WS2812_BYTE_ORDER_RGB`           | WS2812B-2020                  |
+|Byte order                       |Known devices                |
+|---------------------------------|-----------------------------|
+|`WS2812_BYTE_ORDER_GRB` (default)|Most WS2812's, SK6812, SK6805|
+|`WS2812_BYTE_ORDER_RGB`          |WS2812B-2020                 |
+|`WS2812_BYTE_ORDER_BGR`          |TM1812                       |
 
 
 ### Bitbang

drivers/chibios/ws2812.c

@@ -97,6 +97,10 @@ void ws2812_setleds(LED_TYPE *ledarray, uint16_t leds) {
         sendByte(ledarray[i].r);
         sendByte(ledarray[i].g);
         sendByte(ledarray[i].b);
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_BGR)
+        sendByte(ledarray[i].b);
+        sendByte(ledarray[i].g);
+        sendByte(ledarray[i].r);
 #endif
 
 #ifdef RGBW

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 ---------------------------------------------------- */

drivers/chibios/ws2812_spi.c

@@ -70,6 +70,10 @@ static void set_led_color_rgb(LED_TYPE color, int pos) {
     for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + j] = get_protocol_eq(color.r, j);
     for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE + j] = get_protocol_eq(color.g, j);
     for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE * 2 + j] = get_protocol_eq(color.b, j);
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_BGR)
+    for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + j] = get_protocol_eq(color.b, j);
+    for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE + j] = get_protocol_eq(color.g, j);
+    for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE * 2 + j] = get_protocol_eq(color.r, j);
 #endif
 }
 

quantum/color.h

@@ -37,6 +37,7 @@
 
 #define WS2812_BYTE_ORDER_RGB 0
 #define WS2812_BYTE_ORDER_GRB 1
+#define WS2812_BYTE_ORDER_BGR 2
 
 #ifndef WS2812_BYTE_ORDER
 #    define WS2812_BYTE_ORDER WS2812_BYTE_ORDER_GRB
@@ -51,6 +52,10 @@ typedef struct PACKED {
     uint8_t r;
     uint8_t g;
     uint8_t b;
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_BGR)
+    uint8_t b;
+    uint8_t g;
+    uint8_t r;
 #endif
 } cRGB;
 
@@ -66,6 +71,10 @@ typedef struct PACKED {
     uint8_t r;
     uint8_t g;
     uint8_t b;
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_BGR)
+    uint8_t b;
+    uint8_t g;
+    uint8_t r;
 #endif
     uint8_t w;
 } cRGBW;