配置CH32V208外設(shè)ADC1和ADC2為同步規(guī)則模式，并用DMA搬運數(shù)據(jù)到內(nèi)存。從串口數(shù)據(jù)發(fā)現(xiàn)，ADC1可以正確讀出數(shù)據(jù)，而ADC2轉(zhuǎn)換數(shù)據(jù)一直為0，請問這是什么原因？
#include "debug.h"
/* Global Variable */
u32 TxBuf[1];
u16 Adc_Val[4];
s16 Calibrattion_Val1 = 0;
s16 Calibrattion_Val2 = 0;
void DMA1_Channel1_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
/*********************************************************************
?* @fn? ? ? ADC_Function_Init
?*
?* @brief? ?Initializes ADC collection.
?*
?* @return? none
?*/
void ADC_Function_Init(void)
{
? ? ADC_InitTypeDef? ADC_InitStructure = {0};
? ? GPIO_InitTypeDef GPIO_InitStructure = {0};
? ? RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
? ? RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
? ? RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC2, ENABLE);
? ? RCC_ADCCLKConfig(RCC_PCLK2_Div4);
? ? GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_3;
? ? GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
? ? GPIO_Init(GPIOA, &GPIO_InitStructure);
? ? ADC_DeInit(ADC1);
? ? ADC_DeInit(ADC2);
? ? ADC_InitStructure.ADC_Mode = ADC_Mode_RegSimult;
? ? ADC_InitStructure.ADC_ScanConvMode = DISABLE;
? ? ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
? ? ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
? ? ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
? ? ADC_InitStructure.ADC_NbrOfChannel = 1;
? ? ADC_InitStructure.ADC_OutputBuffer = ADC_OutputBuffer_Disable;
? ? ADC_InitStructure.ADC_Pga = ADC_Pga_1;
? ? ADC_Init(ADC1, &ADC_InitStructure);
? ? ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);
? ? ADC_DMACmd(ADC1, ENABLE);
? ? ADC_Cmd(ADC1, ENABLE);
? ? ADC_BufferCmd(ADC1, DISABLE); //disable buffer
? ? ADC_ResetCalibration(ADC1);
? ? while(ADC_GetResetCalibrationStatus(ADC1));
? ? ADC_StartCalibration(ADC1);
? ? while(ADC_GetCalibrationStatus(ADC1));
? ? Calibrattion_Val1 = Get_CalibrationValue(ADC1);
? ? ADC_BufferCmd(ADC1, ENABLE); //enable buffer
? ? ADC_Init(ADC2, &ADC_InitStructure);
? ? ADC_RegularChannelConfig(ADC2, ADC_Channel_3, 1, ADC_SampleTime_239Cycles5);
? ? ADC_SoftwareStartConvCmd(ADC2, ENABLE);
? ? ADC_Cmd(ADC2, ENABLE);
? ? ADC_BufferCmd(ADC2, DISABLE); //disable buffer
? ? ADC_ResetCalibration(ADC2);
? ? while(ADC_GetResetCalibrationStatus(ADC2));
? ? ADC_StartCalibration(ADC2);
? ? while(ADC_GetCalibrationStatus(ADC2));
? ? Calibrattion_Val2 = Get_CalibrationValue(ADC2);
? ? ADC_BufferCmd(ADC2, ENABLE); //enable buffer
}
/*********************************************************************
?* @fn? ? ? DMA_Tx_Init
?*
?* @brief? ?Initializes the DMAy Channelx configuration.
?*
?* @param? ?DMA_CHx - x can be 1 to 7.
?*? ? ? ? ? ppadr - Peripheral base address.
?*? ? ? ? ? memadr - Memory base address.
?*? ? ? ? ? bufsize - DMA channel buffer size.
?*
?* @return? none
?*/
void DMA_Tx_Init(DMA_Channel_TypeDef *DMA_CHx, u32 ppadr, u32 memadr, u16 bufsize)
{
? ? DMA_InitTypeDef? DMA_InitStructure = {0};
? ? NVIC_InitTypeDef NVIC_InitStructure = {0};
? ? RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
? ? DMA_DeInit(DMA_CHx);
? ? DMA_InitStructure.DMA_PeripheralBaseAddr = ppadr;
? ? DMA_InitStructure.DMA_MemoryBaseAddr = memadr;
? ? DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
? ? DMA_InitStructure.DMA_BufferSize = bufsize;
? ? DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
? ? DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
? ? DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
? ? DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
? ? DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
? ? DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
? ? DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
? ? DMA_Init(DMA_CHx, &DMA_InitStructure);
? ? NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
? ? NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
? ? NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
? ? NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
? ? NVIC_Init(&NVIC_InitStructure);
? ? DMA_ITConfig(DMA1_Channel1, DMA_IT_TC | DMA_IT_HT | DMA_IT_TE, ENABLE);
}
/*********************************************************************
?* @fn? ? ? Get_ConversionVal1
?*
?* @brief? ?Get Conversion Value.
?*
?* @param? ?val - Sampling value
?*
?* @return? val+Calibrattion_Val - Conversion Value.
?*/
u16 Get_ConversionVal1(s16 val)
{
? ? if((val + Calibrattion_Val1) < 0)
? ? ? ? return 0;
? ? if((Calibrattion_Val1 + val) > 4095)
? ? ? ? return 4095;
? ? return (val + Calibrattion_Val1);
}
/*********************************************************************
?* @fn? ? ? Get_ConversionVal2
?*
?* @brief? ?Get Conversion Value.
?*
?* @param? ?val - Sampling value
?*
?* @return? val+Calibrattion_Val - Conversion Value.
?*/
u16 Get_ConversionVal2(s16 val)
{
? ? if((val + Calibrattion_Val2) < 0)
? ? ? ? return 0;
? ? if((Calibrattion_Val2 + val) > 4095)
? ? ? ? return 4095;
? ? return (val + Calibrattion_Val2);
}
/*********************************************************************
?* @fn? ? ? main
?*
?* @brief? ?Main program.
?*
?* @return? none
?*/
int main(void)
{
? ? USART_Printf_Init(115200);
? ? Delay_Init();
? ? printf("SystemClk:%d\r\n", SystemCoreClock);
? ? ADC_Function_Init();
? ? printf("CalibrattionValue1:%d\n", Calibrattion_Val1);
? ? printf("CalibrattionValue2:%d\n", Calibrattion_Val2);
? ? DMA_Tx_Init(DMA1_Channel1, (u32)&ADC1->RDATAR, (u32)TxBuf, 1);
? ? DMA_Cmd(DMA1_Channel1, ENABLE);
? ? while(1)
? ? {
? ? ? ? ADC_SoftwareStartConvCmd(ADC1, ENABLE);
? ? ? ? Delay_Ms(500);
? ? }
}
/*********************************************************************
?* @fn? ? ? DMA1_Channel1_IRQHandler
?*
?* @brief? ?DMA1_Channel1_IRQHandler Interrupt Service Function.
?*
?* @return? none
?*/
void DMA1_Channel1_IRQHandler()
{
? ? if(DMA_GetITStatus(DMA1_IT_TC1) == SET)
? ? {
? ? ? ? DMA_ClearITPendingBit(DMA1_IT_GL1);
? ? ? ? Adc_Val[0] = TxBuf[0] & 0xffff;
? ? ? ? Adc_Val[1] = (TxBuf[0] >> 16) & 0xffff;
? ? ? ? printf("ADC1 ch2=%d\r\n", Adc_Val[0]);
? ? ? ? printf("ADC2 ch3=%d\r\n", Adc_Val[1]);
? ? }
}
