AT32F403A SPI DMA驱动液晶，mosi没数据

只看该作者 · 2023-8-15 10:46

这两个函数配置有哪些问题么？
对比了官方demo，除了内部是灵活配置的dma，其他没找到哪些地方不一样。
void spi3_init(void)
{
  gpio_init_type gpio_initstructure;
  spi_init_type spi_init_struct;
dma_init_type dma_init_struct;

  crm_periph_clock_enable(CRM_GPIOC_PERIPH_CLOCK, TRUE);
crm_periph_clock_enable(CRM_IOMUX_PERIPH_CLOCK, TRUE);
crm_periph_clock_enable(CRM_DMA2_PERIPH_CLOCK, TRUE);
crm_periph_clock_enable(CRM_SPI3_PERIPH_CLOCK, TRUE);
gpio_pin_remap_config(SPI3_GMUX_0011, TRUE);

  /* sck */
  gpio_initstructure.gpio_pull          = GPIO_PULL_UP;
  gpio_initstructure.gpio_mode          = GPIO_MODE_MUX;
  gpio_initstructure.gpio_pins          = GPIO_PINS_10;
  gpio_init(GPIOC, &gpio_initstructure);

  /* miso */
  gpio_initstructure.gpio_pull          = GPIO_PULL_UP;
  gpio_initstructure.gpio_mode          = GPIO_MODE_MUX;
  gpio_initstructure.gpio_pins          = GPIO_PINS_11;
  gpio_init(GPIOC, &gpio_initstructure);

  /* mosi */
  gpio_initstructure.gpio_pull          = GPIO_PULL_UP;
  gpio_initstructure.gpio_mode          = GPIO_MODE_MUX;
  gpio_initstructure.gpio_pins          = GPIO_PINS_12;
  gpio_init(GPIOC, &gpio_initstructure);

dma_reset(DMA2_CHANNEL1);
dma_default_para_init(&dma_init_struct);
dma_init_struct.memory_data_width = DMA_MEMORY_DATA_WIDTH_BYTE;          //内存数据的宽度
dma_init_struct.memory_inc_enable = TRUE;                                  //内存地址递增打开
dma_init_struct.peripheral_data_width = DMA_PERIPHERAL_DATA_WIDTH_BYTE;    //外设数据的宽度
dma_init_struct.peripheral_inc_enable = FALSE;                            //外设地址递增关闭
dma_init_struct.priority = DMA_PRIORITY_MEDIUM;                            //中等优先级
dma_init_struct.loop_mode_enable = FALSE;                   //不循环
dma_init_struct.peripheral_base_addr=(uint32_t)&(SPI3->dt);                //外设地址
dma_init_struct.memory_base_addr=(uint32_t)spi3_tx_buffer;                //内存地址
dma_init_struct.direction=DMA_DIR_MEMORY_TO_PERIPHERAL;                   //外设地址为源地址
dma_init_struct.buffer_size=32;
dma_init(DMA2_CHANNEL1, &dma_init_struct);
  dma_channel_enable(DMA2_CHANNEL1, TRUE);
dma_flexible_config(DMA2, FLEX_CHANNEL1, DMA_FLEXIBLE_SPI3_TX);

  spi_init_struct.transmission_mode = SPI_TRANSMIT_FULL_DUPLEX;
  spi_init_struct.master_slave_mode = SPI_MODE_MASTER;
  spi_init_struct.mclk_freq_division = SPI_MCLK_DIV_8;
  spi_init_struct.first_bit_transmission = SPI_FIRST_BIT_MSB;
  spi_init_struct.frame_bit_num = SPI_FRAME_8BIT;
  spi_init_struct.clock_polarity = SPI_CLOCK_POLARITY_HIGH;
  spi_init_struct.clock_phase = SPI_CLOCK_PHASE_2EDGE;
  spi_init_struct.cs_mode_selection = SPI_CS_SOFTWARE_MODE;

  spi_init(SPI3, &spi_init_struct);
  spi_enable(SPI3, TRUE);

  spi_i2s_dma_transmitter_enable(SPI3,TRUE);
}

void LCD_SendByte(uint8_t dat)
{
volatile uint8_t dummy_data;
ST7789_CS_LOW;

while (spi_i2s_flag_get(SPI3, SPI_I2S_TDBE_FLAG) == RESET && spi_i2s_flag_get(SPI3, SPI_I2S_BF_FLAG) == SET)
{
// 等待主机数据发送完毕
}
spi_i2s_data_transmit(SPI3, dat);
while (spi_i2s_flag_get(SPI3, SPI_I2S_RDBF_FLAG) == RESET && spi_i2s_flag_get(SPI3, SPI_I2S_BF_FLAG) == SET)
{
// 等待主机数据接收完毕
}
dummy_data = spi_i2s_data_receive(SPI3);

ST7789_CS_HIGH;
}

AT32F403A SPI DMA驱动液晶，mosi没数据

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