ART-Pi DMA2D LVGL显示颜色不正常

发布于 2022-03-03 18:56:12 浏览：2487 订阅该版

RTT 4.0.3
LVGL 8.3
RTT Ltdc驱动  RGB888模式

使用DMA2D,显示的图颜色不正常，数字显示是虚的，渐变色成了色块，请问这一般是什么情况
lvgl使用 RGB565和ARGB888 都是一样的效果

dma2d配置：
```
   hdma2d.Init.Mode       = DMA2D_M2M_PFC;
    hdma2d.Init.ColorMode  = DMA2D_OUTPUT_RGB888;
    hdma2d.Init.OutputOffset = (LV_HOR_RES - w);

hdma2d.LayerCfg[1].AlphaMode   = DMA2D_NO_MODIF_ALPHA;
    hdma2d.LayerCfg[1].InputAlpha  = 0;
    hdma2d.LayerCfg[1].InputColorMode = DMA2D_OUTPUT_RGB565;
    hdma2d.LayerCfg[1].InputOffset  =0;
    hdma2d.LayerCfg[1].RedBlueSwap   = DMA2D_RB_REGULAR;
    hdma2d.LayerCfg[1].AlphaInverted = DMA2D_REGULAR_ALPHA;
```

使用下面的手动刷屏正常
```
for(y = area->y1; y <= area->y2; y++) {
            row = y * LCD_WIDTH;
            for(x = area->x1; x <= area->x2; x++) {
                pos = row  + x;

lcd->lcd_info.framebuffer[3 * pos]     = color_p->ch.blue;     //B
                lcd->lcd_info.framebuffer[3 * pos + 1] = color_p->ch.green;    //G
                lcd->lcd_info.framebuffer[3 * pos + 2] = color_p->ch.red;      //R

color_p++;
            }
        }
```

![微信图片_20220303184503.png](https://oss-club.rt-thread.org/uploads/20220303/d172bb7d52b65a9e6271ec1857599530.png.webp)