GD32F527 ADC DMA双缓冲存储
我进行adc电压电流采样，想用双缓冲进行配置，目前adc_buffer0 里面数据实时更新，但是进不去中断，把初始化的DMA_INT_FLAG_FTF改成DMA_INT_FLAG_HTF 又可以进入中断了。这是为什么？#define BUFFER_SIZE 512
#define ADC_CHANNEL_CNT 3
#define DMA_BUFFER_SIZE (ADC_CHANNEL_CNT * BUFFER_SIZE)
void User_ADC_Init(void)
{
/* ADC mode config */
adc_sync_mode_config(ADC_SYNC_MODE_INDEPENDENT);
/* ADC contineous function disable */
adc_special_function_config(ADC0, ADC_CONTINUOUS_MODE, ENABLE);
/* ADC scan mode disable */
adc_special_function_config(ADC0, ADC_SCAN_MODE, ENABLE);
/* ADC data alignment config */
adc_data_alignment_config(ADC0, ADC_DATAALIGN_RIGHT);
/* ADC channel length config */
adc_channel_length_config(ADC0, ADC_ROUTINE_CHANNEL, 3);
/* ADC regular channel config */
adc_routine_channel_config(ADC0, 0, ADC_CHANNEL_13, ADC_SAMPLETIME_15);/* 电流采样 */
adc_routine_channel_config(ADC0, 1, ADC_CHANNEL_11, ADC_SAMPLETIME_15);/* 电压采样 */
adc_routine_channel_config(ADC0, 2, ADC_CHANNEL_12, ADC_SAMPLETIME_15);/* 参考电压1.65V采样 */
/* ADC trigger config */
adc_external_trigger_source_config(ADC0, ADC_ROUTINE_CHANNEL, ADC_EXTTRIG_ROUTINE_T0_CH0); ////////ADC_EXTTRIG_ROUTINE_T0_CH0
adc_external_trigger_config(ADC0, ADC_ROUTINE_CHANNEL, EXTERNAL_TRIGGER_DISABLE);///////
/* ADC DMA function enable */
adc_dma_request_after_last_enable(ADC0);
adc_dma_mode_enable(ADC0);
/* enable ADC interface */
adc_enable(ADC0);
/* wait for ADC stability */
delay1ms(2);
/* ADC calibration and reset calibration */
adc_calibration_enable(ADC0);
/* enable ADC software trigger */
adc_software_trigger_enable(ADC0, ADC_ROUTINE_CHANNEL);
}
uint16_t adc_buffer0;
uint16_t adc_buffer1;
void User_DMA_Init(void)
{
dma_single_data_parameter_struct dma_init_struct;
dma_deinit(DMA1, DMA_CH0);
dma_init_struct.periph_addr= (uint32_t)&ADC_RDATA(ADC0);
dma_init_struct.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
dma_init_struct.memory0_addr = (uint32_t)&adc_buffer0;
dma_init_struct.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
dma_init_struct.periph_memory_width = DMA_PERIPH_WIDTH_16BIT;
dma_init_struct.direction = DMA_PERIPH_TO_MEMORY;
dma_init_struct.number = ADC_CHANNEL_CNT * BUFFER_SIZE;
dma_init_struct.priority = DMA_PRIORITY_ULTRA_HIGH;
dma_single_data_mode_init(DMA1, DMA_CH0, &dma_init_struct);
dma_channel_subperipheral_select(DMA1, DMA_CH0, DMA_SUBPERI0);
/* 启用双缓冲 */
dma_memory_address_config(DMA1, DMA_CH0, (uint32_t)&adc_buffer1, DMA_MEMORY_1);
dma_switch_buffer_mode_enable(DMA1, DMA_CH0, ENABLE);
dma_circulation_disable(DMA1, DMA_CH0);
dma_channel_enable(DMA1, DMA_CH0);
/* 开启DMA传输完成中断 */
dma_interrupt_enable(DMA1, DMA_CH0, DMA_INT_FLAG_FTF);
nvic_irq_enable(DMA1_Channel0_IRQn, 1, 0);
}
void DMA1_Channel0_IRQHandler(void)
{
if (dma_interrupt_flag_get(DMA1, DMA_CH0, DMA_INT_FLAG_FTF)==SET) {
dma_interrupt_flag_clear(DMA1, DMA_CH0, DMA_INT_FLAG_FTF);
dma_current_buffer = (dma_current_buffer == 0) ? 1 : 0;
buffer_ready_flag = 1;
}
}
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