本人使用GD32F103RET AD规则同步模式采样两路电流值，配置ADC1为外部触发，ADC0为软件触发。为什么外部触发和软件触发需要配置两遍才能生效？代码如下，最后四行为ADC1的触发源配置和ADC0的软件触发使能，需要相同的代码写两遍。如果只写一遍，功能不可用，有没有哪位大神能解释一下？万分感谢void ADC_init(void)
{
rcu_periph_clock_enable(RCU_GPIOC);
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_DMA0);
rcu_periph_clock_enable(RCU_ADC0);
rcu_periph_clock_enable(RCU_ADC1);
rcu_adc_clock_config(RCU_CKADC_CKAPB2_DIV8);//72M 9M
gpio_init(GPIOC, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_2 | GPIO_PIN_3);
gpio_init(GPIOA, GPIO_MODE_AIN, GPIO_OSPEED_50MHZ, GPIO_PIN_3);
dma_parameter_struct dma_data_parameter;
dma_deinit(DMA0, DMA_CH0);
dma_data_parameter.periph_addr = (uint32_t)(&ADC_RDATA(ADC0));
dma_data_parameter.periph_inc = DMA_PERIPH_INCREASE_DISABLE;
dma_data_parameter.memory_addr = (uint32_t)(adc_value);
dma_data_parameter.memory_inc = DMA_MEMORY_INCREASE_ENABLE;
dma_data_parameter.periph_width = DMA_PERIPHERAL_WIDTH_32BIT;
dma_data_parameter.memory_width = DMA_MEMORY_WIDTH_32BIT;
dma_data_parameter.direction = DMA_PERIPHERAL_TO_MEMORY;
dma_data_parameter.number = 2;
dma_data_parameter.priority = DMA_PRIORITY_HIGH;
dma_init(DMA0, DMA_CH0, &dma_data_parameter);
dma_circulation_enable(DMA0, DMA_CH0);
dma_channel_enable(DMA0, DMA_CH0);
adc_special_function_config(ADC0, ADC_SCAN_MODE, ENABLE);
adc_special_function_config(ADC0, ADC_CONTINUOUS_MODE, ENABLE);
adc_external_trigger_source_config(ADC0, ADC_REGULAR_CHANNEL, ADC0_1_2_EXTTRIG_REGULAR_NONE);
adc_data_alignment_config(ADC0, ADC_DATAALIGN_RIGHT);
adc_channel_length_config(ADC0, ADC_REGULAR_CHANNEL, 2);
adc_regular_channel_config(ADC0, 0, ADC_CHANNEL_12, ADC_SAMPLETIME_239POINT5);
adc_regular_channel_config(ADC0, 1, ADC_CHANNEL_12, ADC_SAMPLETIME_239POINT5);
adc_dma_mode_enable(ADC0);
adc_special_function_config(ADC1, ADC_SCAN_MODE, ENABLE);
adc_special_function_config(ADC1, ADC_CONTINUOUS_MODE, ENABLE);
adc_external_trigger_source_config(ADC1, ADC_REGULAR_CHANNEL, ADC0_1_2_EXTTRIG_REGULAR_NONE);
adc_data_alignment_config(ADC1, ADC_DATAALIGN_RIGHT);
adc_channel_length_config(ADC1, ADC_REGULAR_CHANNEL, 2);
adc_regular_channel_config(ADC1, 0, ADC_CHANNEL_13, ADC_SAMPLETIME_239POINT5);
adc_regular_channel_config(ADC1, 1, ADC_CHANNEL_3, ADC_SAMPLETIME_239POINT5);
adc_mode_config(ADC_DAUL_REGULAL_PARALLEL);
adc_enable(ADC0);
delay_1ms(1);
adc_calibration_enable(ADC0);
adc_enable(ADC1);
delay_1ms(1);
adc_calibration_enable(ADC1);
adc_external_trigger_config(ADC1, ADC_REGULAR_CHANNEL, ENABLE);
adc_external_trigger_config(ADC1, ADC_REGULAR_CHANNEL, ENABLE);
adc_software_trigger_enable(ADC0,ADC_REGULAR_CHANNEL);
adc_software_trigger_enable(ADC0,ADC_REGULAR_CHANNEL);
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