diff options
Diffstat (limited to 'main/display.c')
| -rw-r--r-- | main/display.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/main/display.c b/main/display.c index c37ea52..13babdb 100644 --- a/main/display.c +++ b/main/display.c @@ -424,13 +424,17 @@ esp_err_t display_wake(void) return err; } -// RGB565 → RGB888 in R,G,B byte order. TC358762's LCDCTRL = RGB888 path -// expects channel-order matching the DSI 24bpp packing. +// RGB565 → RGB888 in B,G,R byte order. The ESP32-P4 DSI engine + TC358762 +// bridge pipeline expects BGR on the wire for the panel's RGB channels — +// writing R first paints pure blue as solid red on the panel (verified +// with the M5 self-test: decoded buffer holds 0x001F, panel showed red). +// Symmetric pixels (white text on black) don't expose this; saturated +// channel inputs do. static inline void rgb565_to_rgb888(uint16_t px, uint8_t *out) { - out[0] = (uint8_t)(((px >> 11) & 0x1F) * 255 / 31); // R + out[0] = (uint8_t)(( px & 0x1F) * 255 / 31); // B out[1] = (uint8_t)(((px >> 5) & 0x3F) * 255 / 63); // G - out[2] = (uint8_t)(( px & 0x1F) * 255 / 31); // B + out[2] = (uint8_t)(((px >> 11) & 0x1F) * 255 / 31); // R } esp_err_t display_fill(uint16_t rgb565) |