How can it be using DMA if the HAL_SPI_Transmit_DMA function is not used?

[rtek1000]

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]

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/ — Reply to this email directly, view it on GitHub <#7>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AA5I3NZ2PIQMDLXYYMXQ4MTXNNIILANCNFSM6AAAAAAZWFZOI4> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>