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-rw-r--r--docs/ws2812_driver.md11
-rw-r--r--drivers/chibios/ws2812.c7
-rw-r--r--drivers/chibios/ws2812_pwm.c45
-rw-r--r--drivers/chibios/ws2812_spi.c6
-rw-r--r--quantum/color.h20
5 files changed, 85 insertions, 4 deletions
diff --git a/docs/ws2812_driver.md b/docs/ws2812_driver.md
index c1b96329e9..da5db01dbd 100644
--- a/docs/ws2812_driver.md
+++ b/docs/ws2812_driver.md
@@ -28,6 +28,17 @@ The default setting is 280 µs, which should work for most cases, but this can b
#define WS2812_TRST_US 80
```
+#### Byte Order
+
+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 |
+
+
### Bitbang
Default driver, the absence of configuration assumes this driver. To configure it, add this to your rules.mk:
diff --git a/drivers/chibios/ws2812.c b/drivers/chibios/ws2812.c
index 0440cac755..504fb4f074 100644
--- a/drivers/chibios/ws2812.c
+++ b/drivers/chibios/ws2812.c
@@ -89,9 +89,16 @@ void ws2812_setleds(LED_TYPE *ledarray, uint16_t leds) {
for (uint8_t i = 0; i < leds; i++) {
// WS2812 protocol dictates grb order
+#if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB)
sendByte(ledarray[i].g);
sendByte(ledarray[i].r);
sendByte(ledarray[i].b);
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_RGB)
+ sendByte(ledarray[i].r);
+ sendByte(ledarray[i].g);
+ sendByte(ledarray[i].b);
+#endif
+
#ifdef RGBW
sendByte(ledarray[i].w);
#endif
diff --git a/drivers/chibios/ws2812_pwm.c b/drivers/chibios/ws2812_pwm.c
index bfb44ce4a4..14be0a9edc 100644
--- a/drivers/chibios/ws2812_pwm.c
+++ b/drivers/chibios/ws2812_pwm.c
@@ -107,6 +107,7 @@
*/
#define WS2812_BIT(led, byte, bit) (24 * (led) + 8 * (byte) + (7 - (bit)))
+#if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB)
/**
* @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given red bit
*
@@ -117,7 +118,7 @@
*
* @return The bit index
*/
-#define WS2812_RED_BIT(led, bit) WS2812_BIT((led), 1, (bit))
+# define WS2812_RED_BIT(led, bit) WS2812_BIT((led), 1, (bit))
/**
* @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given green bit
@@ -129,7 +130,7 @@
*
* @return The bit index
*/
-#define WS2812_GREEN_BIT(led, bit) WS2812_BIT((led), 0, (bit))
+# define WS2812_GREEN_BIT(led, bit) WS2812_BIT((led), 0, (bit))
/**
* @brief Determine the index in @ref ws2812_frame_buffer "the frame buffer" of a given blue bit
@@ -141,7 +142,45 @@
*
* @return The bit index
*/
-#define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 2, (bit))
+# define WS2812_BLUE_BIT(led, bit) WS2812_BIT((led), 2, (bit))
+
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_RGB)
+/**
+ * @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), 0, (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), 2, (bit))
+#endif
/* --- PRIVATE VARIABLES ---------------------------------------------------- */
diff --git a/drivers/chibios/ws2812_spi.c b/drivers/chibios/ws2812_spi.c
index 7a1d2f05da..1dec1f5167 100644
--- a/drivers/chibios/ws2812_spi.c
+++ b/drivers/chibios/ws2812_spi.c
@@ -62,9 +62,15 @@ static uint8_t get_protocol_eq(uint8_t data, int pos) {
static void set_led_color_rgb(LED_TYPE color, int pos) {
uint8_t* tx_start = &txbuf[PREAMBLE_SIZE];
+#if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB)
for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + j] = get_protocol_eq(color.g, j);
for (int j = 0; j < 4; j++) tx_start[BYTES_FOR_LED * pos + BYTES_FOR_LED_BYTE + j] = get_protocol_eq(color.r, 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_RGB)
+ 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);
+#endif
}
void ws2812_init(void) {
diff --git a/quantum/color.h b/quantum/color.h
index 5c5a0f0ebd..f0ee782757 100644
--- a/quantum/color.h
+++ b/quantum/color.h
@@ -36,20 +36,38 @@
# define LED_TYPE RGB
#endif
-// WS2812 specific layout
+#define WS2812_BYTE_ORDER_RGB 0
+#define WS2812_BYTE_ORDER_GRB 1
+
+#ifndef WS2812_BYTE_ORDER
+# define WS2812_BYTE_ORDER WS2812_BYTE_ORDER_GRB
+#endif
+
typedef struct PACKED {
+#if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB)
uint8_t g;
uint8_t r;
uint8_t b;
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_RGB)
+ uint8_t r;
+ uint8_t g;
+ uint8_t b;
+#endif
} cRGB;
typedef cRGB RGB;
// WS2812 specific layout
typedef struct PACKED {
+#if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB)
uint8_t g;
uint8_t r;
uint8_t b;
+#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_RGB)
+ uint8_t r;
+ uint8_t g;
+ uint8_t b;
+#endif
uint8_t w;
} cRGBW;