GD32A503RDT3 ADC+DMA顺序转换问题，没有数据

只看该作者 · 2023-8-28 16:12

void rcu_config(void)
{
/* enable GPIO clock */
rcu_periph_clock_enable(RCU_GPIOB);
rcu_periph_clock_enable(RCU_GPIOE);
/* enable ADC0 clock */
rcu_periph_clock_enable(RCU_ADC0);
/* enable DMA0 clock */
rcu_periph_clock_enable(RCU_DMA0);
}

/*!
\brief    configure the GPIO peripheral
\param[in]  none
\param[out] none
\retval    none
*/
void gpio_config(void)
{
/* config the GPIO as analog mode */
gpio_mode_set(GPIOB, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO_PIN_1);//GPIOB1,
gpio_mode_set(GPIOE, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO_PIN_13);
}

/*!
\brief    configure the DMA peripheral
\param[in]  none
\param[out] none
\retval    none
*/
void dma_config(void)
{
/* ADC_DMA_channel configuration */
dma_parameter_struct dma_data_parameter;
/* ADC DMA_channel configuration */
dma_deinit(DMA0, DMA_CH0);
/* initialize DMA single data mode */
dma_data_parameter.periph_addr  = (uint32_t)(&ADC_RDATA(ADC0));//外设基地址
dma_data_parameter.periph_inc = DMA_PERIPH_INCREASE_DISABLE;//内存地址增量模式
dma_data_parameter.memory_addr  = (uint32_t)adc_value;//数据存放地址
dma_data_parameter.memory_inc = DMA_MEMORY_INCREASE_ENABLE;//内存地址增量模式
dma_data_parameter.periph_width = DMA_PERIPHERAL_WIDTH_16BIT;//dma外设宽度16位，半字
dma_data_parameter.memory_width = DMA_MEMORY_WIDTH_16BIT;
dma_data_parameter.direction = DMA_PERIPHERAL_TO_MEMORY;//传输模式，外设到存储（接收）
dma_data_parameter.number    = 2;//长度
dma_data_parameter.priority    = DMA_PRIORITY_HIGH;//优先级高
dma_init(DMA0, DMA_CH0, &dma_data_parameter);
dma_circulation_enable(DMA0, DMA_CH0);
/* enable DMA channel */
dma_channel_enable(DMA0, DMA_CH0);
}

/*!
\brief    configure the ADC peripheral
\param[in]  none
\param[out] none
\retval    none
*/
void adc_config(void)
{
   /* config ADC clock */
rcu_adc_clock_config(RCU_CKADC_CKAHB_DIV10);
adc_deinit(ADC0);
adc_mode_config(ADC_MODE_FREE);//ADC工作在独立模式
/* ADC continous function enable */
adc_special_function_config(ADC0, ADC_SCAN_MODE, ENABLE);
adc_special_function_config(ADC0, ADC_CONTINUOUS_MODE, ENABLE);
/* ADC trigger config */
adc_external_trigger_source_config(ADC0, ADC_REGULAR_CHANNEL, ADC0_1_EXTTRIG_REGULAR_NONE);//外部触发源设置
/* ADC data alignment config */
adc_data_alignment_config(ADC0, ADC_DATAALIGN_RIGHT);//数据对齐配置
/* ADC channel length config */
adc_channel_length_config(ADC0, ADC_REGULAR_CHANNEL, 2);//用到几个转换通道
/* ADC regular channel config */
adc_regular_channel_config(ADC0, 1, ADC_CHANNEL_7, ADC_SAMPLETIME_55POINT5);
adc_regular_channel_config(ADC0, 2, ADC_CHANNEL_9, ADC_SAMPLETIME_55POINT5);
adc_external_trigger_config(ADC0, ADC_REGULAR_CHANNEL, ENABLE);
/* enable ADC interface */
adc_enable(ADC0);
/* ADC DMA function enable */
adc_dma_mode_enable(ADC0);
/* ADC calibration and reset calibration */
adc_calibration_enable(ADC0);
}

main.c
/* system clocks configuration */
rcu_config();
/* GPIO configuration */
gpio_config();
/* DMA configuration */
dma_config();
/* ADC configuration */
adc_config();
adc_software_trigger_enable(ADC0, ADC_REGULAR_CHANNEL);