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ardnew / ILI9341-STM32-HAL

ILI9341 color TFT display and touchscreen driver for STM32 using HAL SPI with DMA
MIT License
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How can it be using DMA if the HAL_SPI_Transmit_DMA function is not used? #7

Closed rtek1000 closed 9 months ago

rtek1000 commented 1 year ago

Hi,

void ili9341_spi_write_command(ili9341_t *lcd,
    ili9341_spi_slave_t spi_slave, uint8_t command)
{
  __SLAVE_SELECT(lcd, spi_slave);

  HAL_GPIO_WritePin(lcd->data_command_port, lcd->data_command_pin, __GPIO_PIN_CLR__);
  HAL_SPI_Transmit(lcd->spi_hal, &command, sizeof(command), __SPI_MAX_DELAY__);

  __SLAVE_RELEASE(lcd, spi_slave);
}

void ili9341_spi_write_data(ili9341_t *lcd,
    ili9341_spi_slave_t spi_slave, uint16_t data_sz, uint8_t data[])
{
  __SLAVE_SELECT(lcd, spi_slave);

  HAL_GPIO_WritePin(lcd->data_command_port, lcd->data_command_pin, __GPIO_PIN_SET__);
  HAL_SPI_Transmit(lcd->spi_hal, data, data_sz, __SPI_MAX_DELAY__);

  __SLAVE_RELEASE(lcd, spi_slave);
}

Reference: https://visualgdb.com/tutorials/arm/stm32/spi/

ardnew commented 1 year ago

Those functions you reference are from the lower level SPI driver.

DMA coordination is performed higher in the graphics driver:

https://github.com/ardnew/ILI9341-STM32-HAL/blob/58a295d3d4bc2d55bea13989c6f9ea798504735b/ILI9341/ili9341_gfx.c#L115-L134

On Tue, Jun 27, 2023, 16:47 rtek1000 @.***> wrote:

Hi,

void ili9341_spi_write_command(ili9341_t *lcd, ili9341_spi_slave_t spi_slave, uint8_t command) { __SLAVE_SELECT(lcd, spi_slave);

HAL_GPIO_WritePin(lcd->data_command_port, lcd->data_command_pin, GPIO_PIN_CLR); HAL_SPI_Transmit(lcd->spi_hal, &command, sizeof(command), SPI_MAX_DELAY);

__SLAVE_RELEASE(lcd, spi_slave); } void ili9341_spi_write_data(ili9341_t *lcd, ili9341_spi_slave_t spi_slave, uint16_t data_sz, uint8_t data[]) { __SLAVE_SELECT(lcd, spi_slave);

HAL_GPIO_WritePin(lcd->data_command_port, lcd->data_command_pin, GPIO_PIN_SET); HAL_SPI_Transmit(lcd->spi_hal, data, data_sz, SPI_MAX_DELAY);

__SLAVE_RELEASE(lcd, spi_slave); }

Reference: https://visualgdb.com/tutorials/arm/stm32/spi/

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