any method of increasing the rendering speed of a display with the esp_lcd component?

M

Marvee AmasiAPP•12/16/24, 10:53 AM

Hi @te0 , you know you can actually enable DMA for your display communication so that ESP32 can move data faster without blocking the CPU, and rendering speed is improved

M

Marvee AmasiAPP•12/16/24, 10:53 AM

I know about this method

SPI/LCD transfers
lcd_config.spi_bus_dma_channel = SPI_DMA_CH_AUTO;

SPI/LCD transfers
lcd_config.spi_bus_dma_channel = SPI_DMA_CH_AUTO;

SPI/LCD transfers
lcd_config.spi_bus_dma_channel = SPI_DMA_CH_AUTO;

SPI/LCD transfers
lcd_config.spi_bus_dma_channel = SPI_DMA_CH_AUTO;

T

te0APP•12/16/24, 10:53 AM

ive already done that

    status = spi_bus_initialize(LCD_HOST, &buscfg, SPI_DMA_CH_AUTO);

    status = spi_bus_initialize(LCD_HOST, &buscfg, SPI_DMA_CH_AUTO);

    status = spi_bus_initialize(LCD_HOST, &buscfg, SPI_DMA_CH_AUTO);

    status = spi_bus_initialize(LCD_HOST, &buscfg, SPI_DMA_CH_AUTO);

T

te0APP•12/16/24, 10:55 AM

the problem is that

esp_lcd_panel_draw_bitmap

esp_lcd_panel_draw_bitmap

esp_lcd_panel_draw_bitmap

esp_lcd_panel_draw_bitmap draws garbage if i pass it a large area

Z

ZacckOsiemoAPP•12/16/24, 11:38 AM

have you tried upping your clock speeds? Are the maxed out already?

T

te0APP•12/16/24, 11:38 AM

Yes , 40mhz

T

te0APP•12/16/24, 11:38 AM

Maybe its because im using a breadboard

Z

ZacckOsiemoAPP•12/16/24, 11:39 AM

ah, so maxxed out speed plus DMA and its still slow, can you maybe show some clips to see how the rendering is. Are you doing double buffering.

M

Marvee AmasiAPP•12/16/24, 11:39 AM

Does the ESP32 have external PSRAM?

any method of increasing the rendering speed of a display with the esp_lcd component?

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