ADC引脚和PWM引脚引线短接，PWM频率1K，定时器触发12K
ADC通过定时器触发，接收完毕后通过DMA中断打印数据
仿真调试中发现数据不正常（每1024个数据都有）， （数据如下）
939:0,
940:1,
941:1,
942:0,
943:0,
944:0,
945:4095,
946:4095,
947:4095,
948:4095,
949:4095,
950:4095,
951:0,
952:4095,
953:4095,
954:4095,
955:0,
956:0,
957:0,
958:0,
959:0,
960:1,
961:4095,
962:4095,
963:4095,
964:4095,
965:4095,
966:4095,
现在不知是哪了的问题，请大家帮忙看下 谢谢
外设配置代码如下
void DMA_ADC_1_Init(void)
{
DMA_InitTypeDef DMA_InitStructure = {0};
NVIC_InitTypeDef NVIC_InitStructure = {0};
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
DMA_DeInit(DMA_ADC1_CHANNEL);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC_1_ARR;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = DMA_ADC1_BufferSize ;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA_ADC1_CHANNEL, &DMA_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
DMA_ITConfig(DMA1_Channel1,DMA_IT_TC, ENABLE); //使能传输完成中断
DMA_Cmd(DMA_ADC1_CHANNEL, ENABLE);
}
void TIM4_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
TIM_TimeBaseStructure.TIM_Period = USER_TIM_Period;
TIM_TimeBaseStructure.TIM_Prescaler = USER_TIM_Prescaler;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;
TIM_OCInitStructure.TIM_Pulse = USER_TIM_Period/2000;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
TIM_OC4Init(TIM4,&TIM_OCInitStructure);
TIM_Cmd(TIM4, ENABLE);
}
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_ADCCLKConfig(RCC_PCLK2_Div8);/*12M*/
GPIO_InitStructure.GPIO_Pin = ADC1_LOOP_1 | ADC1_LOOP
| ADC1_Light | ADC1_AC_Light;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
ADC_DeInit(ADC1);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T4_CC4;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = ADC_1_NbrOfChannel;
ADC_InitStructure.ADC_OutputBuffer = ADC_OutputBuffer_Disable;/*不用输出BUFF*/
ADC_InitStructure.ADC_Pga = ADC_Pga_1;/*不用放大增益*/
ADC_Init(ADC1, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC1, ADC1_IN1_LOOP,1, ADC_SampleTime_71Cycles5);//PWM
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_Val = Get_CalibrationValue(ADC1);
ADC_DMACmd(ADC1, ENABLE);
ADC_ExternalTrigConvCmd(ADC1, ENABLE);
}
/*PWM*/
void TIM1_PWMOut_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure={0};
TIM_OCInitTypeDef TIM_OCInitStructure={0};
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure={0};
RCC_APB2PeriphClockCmd( ADVANCE_TIM_CH1N_GPIO_CLK | RCC_APB2Periph_TIM1, ENABLE );
GPIO_InitStructure.GPIO_Pin = ADVANCE_TIM_CH1N_PIN ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( ADVANCE_TIM_CH3N_PORT, &GPIO_InitStructure );
TIM_TimeBaseInitStructure.TIM_Period = TIM1_PWMOut_Period;
TIM_TimeBaseInitStructure.TIM_Prescaler = TIM1_PWMOut_Prescaler;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = ADVANCE_TIM_CounterMode;
TIM_TimeBaseInit( ADVANCE_TIM, &TIM_TimeBaseInitStructure);
#if (PWM_MODE == PWM_MODE1)
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
#elif (PWM_MODE == PWM_MODE2)
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
#endif
/*CH1N*/
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse = TIM1_CCR1_Value;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_CH1N_OCPolarity;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
TIM_OC1Init( ADVANCE_TIM, &TIM_OCInitStructure );
// 主输出使能，当使用的是通用定时器时，这句不需要
TIM_CtrlPWMOutputs(ADVANCE_TIM, ENABLE );
/*TIM_OCPreload_Disable 后 更改CCP值后 马上更新数据*/
TIM_OC1PreloadConfig( ADVANCE_TIM, TIM_OCPreload_Disable );
TIM_ARRPreloadConfig( ADVANCE_TIM, ENABLE );
}
void DMA1_Channel1_IRQHandler(void)
{
uint32_t i;
if(DMA_GetITStatus(DMA1_IT_TC1)!=RESET)
{
TIM_Cmd( TIM4, DISABLE );
for(i = 0;i
热门产品 :
CH32V317: 互联型青稞RISC-V MCU