at32f413 DMA新手求助

只看该作者 · 2023-3-6 14:56

使用DMA更新PWM脉宽数据，TIMR5输出两路PWM,频率相同，脉宽不同，以下代码PWM正常工作，DMA无法更新数据。感谢大佬们帮忙看看一下。void tmr5_configuration(void)
{
tmr_output_config_type tmr_output_struct;
  /* Init TMR5 */
tmr_base_init(TMR5, 250-1, 0); //200MHz/250=800KHz
//tmr_base_init(TMR5, 300-1, 0); //240MHz/300=800KHz
  tmr_cnt_dir_set(TMR5, TMR_COUNT_UP); //定时器计数器向上计数

/* TMR configuration as output mode */
  tmr_output_default_para_init(&tmr_output_struct);

tmr_output_struct.oc_mode = TMR_OUTPUT_CONTROL_PWM_MODE_B;
  tmr_output_struct.oc_output_state = TRUE;
  tmr_output_struct.oc_polarity = TMR_OUTPUT_ACTIVE_LOW;
  tmr_output_struct.oc_idle_state = TRUE;
  tmr_output_struct.occ_output_state = TRUE;
  tmr_output_struct.occ_polarity = TMR_OUTPUT_ACTIVE_LOW;
  tmr_output_struct.occ_idle_state = FALSE;

/* TMR5 channel 1 configuration */
  tmr_output_channel_config(TMR5, TMR_SELECT_CHANNEL_1, &tmr_output_struct);
tmr_output_channel_buffer_enable(TMR5, TMR_SELECT_CHANNEL_1, TRUE);

/* TMR5 channel 2 configuration */
  tmr_output_channel_config(TMR5, TMR_SELECT_CHANNEL_2, &tmr_output_struct);
tmr_output_channel_buffer_enable(TMR5, TMR_SELECT_CHANNEL_2, TRUE);
}

void dma2_5_configuration(void)
{
dma_init_type dma_init_struct = {0};

dma_reset(DMA2_CHANNEL5);
dma_reset(DMA2_CHANNEL4);
  /* dma1 channel7 configuration */
  dma_default_para_init(&dma_init_struct);
  dma_init_struct.buffer_size =ArgbPixelBuffNub+ArgbPixelResetNub; //设置 DMA 通道传输数据量
  dma_init_struct.direction = DMA_DIR_MEMORY_TO_PERIPHERAL; //方向为存储器到外设
  dma_init_struct.memory_base_addr = (uint32_t)temp_buffer_argb2; //设置 DMA 通道存储器地址
  dma_init_struct.memory_data_width = DMA_MEMORY_DATA_WIDTH_BYTE; //存储器数据宽度为字节
  dma_init_struct.memory_inc_enable = TRUE; //存储器地址递增
  dma_init_struct.peripheral_base_addr = (uint32_t)0x40000C34; //TMR5_C1DT_ADDRESS; //设置 DMA 通道的外设地址
  dma_init_struct.peripheral_data_width = DMA_PERIPHERAL_DATA_WIDTH_BYTE; //外设数据宽度为字节
  dma_init_struct.peripheral_inc_enable = FALSE; //外设地址不递增
  dma_init_struct.priority = DMA_PRIORITY_MEDIUM; //DMA 通道优先级为中
  dma_init_struct.loop_mode_enable = TRUE; //DMA 通道为循环模式

  dma_init(DMA2_CHANNEL5, &dma_init_struct);

dma_init_struct.memory_base_addr = (uint32_t)temp_buffer_argb1; //设置 DMA 通道存储器地址
dma_init_struct.peripheral_base_addr = (uint32_t)0x40000C38; //TMR5_C2DT_ADDRESS; //设置 DMA 通道的外设地址
dma_init(DMA2_CHANNEL4, &dma_init_struct);
}

void ARGB_configuration(void)
{
tmr5_configuration();
tmr_channel_value_set(TMR5, TMR_SELECT_CHANNEL_2, temp_buffer_argb1[0]);
tmr_channel_value_set(TMR5, TMR_SELECT_CHANNEL_1, temp_buffer_argb2[0]);
tmr_dma_request_enable(TMR5, TMR_OVERFLOW_DMA_REQUEST, TRUE);
dma2_5_configuration();
dma_flexible_config(DMA2, FLEX_CHANNEL4|FLEX_CHANNEL5, DMA_FLEXIBLE_TMR3_OVERFLOW);
dma_channel_enable(DMA2_CHANNEL4, TRUE);
dma_channel_enable(DMA2_CHANNEL5, TRUE);

tmr_output_enable(TMR5, TRUE);
  tmr_counter_enable(TMR5, TRUE);

}

at32f413 DMA新手求助

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