因为采样多个通道的AD转换,所以我用了ADC+DMA的方式进行的,定时器TIM4的上升沿触发AD转换(定时50us转换一次),但是始终无法进入AD转换完成中断中,求各位高手帮忙分析是什么原因导致的,谢谢。程序如下: void NVIC_Configuration(void) { NVIC_InitTypeDef NVIC_InitStructure; /* Enable ADC1 DMA1_Channel1 Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = ADC1_IRQn; //ÓÃÓÚADC1 DMA²ÉÑùÊý¾Ý¶ÁÈ¡ NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } void ADC1_DMA_Configuration(void) //ADC²ÉÑù³õʼ»¯ÅäÖà { GPIO_InitTypeDef GPIO_InitStructure; ADC_InitTypeDef ADC_InitStructure; ADC_CommonInitTypeDef ADC_CommonInitStructure; DMA_InitTypeDef DMA_InitStructure; /* Configure the ADC clock */ RCC_ADCCLKConfig(RCC_ADC12PLLCLK_Div2); /* Enable the DMA1¡¢GPIOA ¡¢GPIOB and ADC1 Clock */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 | RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB | RCC_AHBPeriph_ADC12, ENABLE); if (SysTick_Config(SystemCoreClock / 1000000)) { while (1) {} } /* Configure PA0/PA1/PA2/PA3/PA6/PA7/PB0/PB1 (ADC Channel1/2/3/4/5/10/15/11/12) in analog mode */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_6 | GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOB, &GPIO_InitStructure); /* Configure DMA1_Channel1 */ DMA_DeInit(DMA1_Channel1); DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_ADDRESS; DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADC_ConvertedValue; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_BufferSize = 8; 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(DMA1_Channel1, &DMA_InitStructure); // DMA_ITConfig(DMA1,DMA_IT_TC,ENABLE); /* Enable DMA1 Channel1 */ DMA_Cmd(DMA1_Channel1, ENABLE); /* Configure ADC1 */ ADC_StructInit(&ADC_InitStructure); /* Calibration procedure */ ADC_VoltageRegulatorCmd(ADC1, ENABLE); /* Insert delay equal to 10ms */ Delay(10); ADC_SelectCalibrationMode(ADC1, ADC_CalibrationMode_Single); ADC_StartCalibration(ADC1); while(ADC_GetCalibrationStatus(ADC1) != RESET ); calibration_value = ADC_GetCalibrationValue(ADC1); /* Configure the ADC1 in continuous mode */ ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent; ADC_CommonInitStructure.ADC_Clock = ADC_Clock_AsynClkMode; ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled; ADC_CommonInitStructure.ADC_DMAMode = ADC_DMAMode_Circular; ADC_CommonInitStructure.ADC_TwoSamplingDelay = 5; ADC_CommonInit(ADC1, &ADC_CommonInitStructure); ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b; ADC_InitStructure.ADC_ContinuousConvMode = ADC_ContinuousConvMode_Disable; ADC_InitStructure.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_5; //TIM4_CC4 event ADC_InitStructure.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_RisingEdge; ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; ADC_InitStructure.ADC_OverrunMode = ADC_OverrunMode_Disable; ADC_InitStructure.ADC_AutoInjMode = ADC_AutoInjec_Disable; ADC_InitStructure.ADC_NbrOfRegChannel = 8; ADC_Init(ADC1, &ADC_InitStructure); /* ADC1 regular channel1 configuration */ ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_181Cycles5); ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 2, ADC_SampleTime_181Cycles5); ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 3, ADC_SampleTime_181Cycles5); ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 4, ADC_SampleTime_181Cycles5); ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 6, ADC_SampleTime_181Cycles5); ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 7, ADC_SampleTime_181Cycles5); ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 8, ADC_SampleTime_181Cycles5); ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 9, ADC_SampleTime_181Cycles5); /* Enable ADC1 */ ADC_Cmd(ADC1, ENABLE); /* Enable ADC1 sample finish interrupt */ ADC_ITConfig(ADC1,ADC_IT_EOC,ENABLE); /* wait for ADRDY */ while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_RDY)); /* ADC1 DMA Enable */ ADC_DMACmd(ADC1, ENABLE); ADC_DMAConfig(ADC1, ADC_DMAMode_Circular); } void TIM4_Configuration(void) //TIM4定时50us触发AD采样 { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; /* TIM4 clock enable */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); /* Time Base configuration */ TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); TIM_TimeBaseStructure.TIM_Period = 50; TIM_TimeBaseStructure.TIM_Prescaler = 72 - 1; //72M/(71+1) = 1,000,000 -->1us TIM_TimeBaseStructure.TIM_ClockDivision = 0x0; 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_Pulse = 25; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OC4Init(TIM4,&TIM_OCInitStructure); TIM_Cmd(TIM4,ENABLE); TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable); } |
谢谢楼主回复,我已经你的指导改成DMA1_Channel1中断了,但是还是不能定时50us进入中断读取数据,麻烦请帮忙再指导下,谢谢,修改后的程序如下:
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void ADC1_DMA_Configuration(void) //ADC²ÉÑù³õʼ»¯ÅäÖÃ
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
DMA_InitTypeDef DMA_InitStructure;
/* Enable the DMA1¡¢GPIOA ¡¢GPIOB and ADC1 Clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 | RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB | RCC_AHBPeriph_ADC12, ENABLE);
/* Configure the ADC clock */
RCC_ADCCLKConfig(RCC_ADC12PLLCLK_Div2);
if (SysTick_Config(SystemCoreClock / 1000000))
{
while (1)
{}
}
/* Configure PA0/PA1/PA2/PA3/PA6/PA7/PB0/PB1 (ADC Channel1/2/3/4/5/10/15/11/12) in analog mode */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3
| GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* Configure DMA1_Channel1 */
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_ADDRESS;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADC_ConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 8;
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(DMA1_Channel1, &DMA_InitStructure);
DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,ENABLE);
/* Enable DMA1 Channel1 */
DMA_Cmd(DMA1_Channel1, ENABLE);
/* Configure ADC1 */
// ADC_StructInit(&ADC_InitStructure);
ADC_DeInit(ADC1);
/* Calibration procedure */
ADC_VoltageRegulatorCmd(ADC1, ENABLE);
/* Insert delay equal to 10us */
Delay(10);
ADC_SelectCalibrationMode(ADC1, ADC_CalibrationMode_Single);
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1) != RESET );
calibration_value = ADC_GetCalibrationValue(ADC1);
/* Configure the ADC1 in continuous mode */
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_Clock = ADC_Clock_AsynClkMode;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
ADC_CommonInitStructure.ADC_DMAMode = ADC_DMAMode_Circular;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = 5;
ADC_CommonInit(ADC1, &ADC_CommonInitStructure);
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ContinuousConvMode = ADC_ContinuousConvMode_Disable;
ADC_InitStructure.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_5; //TIM4_CC4 event
ADC_InitStructure.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_RisingEdge;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_OverrunMode = ADC_OverrunMode_Disable;
ADC_InitStructure.ADC_AutoInjMode = ADC_AutoInjec_Disable;
ADC_InitStructure.ADC_NbrOfRegChannel = 8;
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular channel1 configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_181Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 2, ADC_SampleTime_181Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 3, ADC_SampleTime_181Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_4, 4, ADC_SampleTime_181Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 6, ADC_SampleTime_181Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 7, ADC_SampleTime_181Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 8, ADC_SampleTime_181Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 9, ADC_SampleTime_181Cycles5);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* wait for ADRDY */
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_RDY));
/* ADC1 DMA Enable */
ADC_DMACmd(ADC1, ENABLE);
ADC_DMAConfig(ADC1, ADC_DMAMode_Circular);
}
void DMA1_Channel1_IRQHandler(void)
{
if(DMA_GetFlagStatus(DMA1_FLAG_TC1) != RESET)
{
sADCFinished(); //读取AD采样数据
DMA_ClearFlag(DMA1_FLAG_TC1);
}
Tconv = 1.5 + 12.5 = 14 cycles = 1.17 μs
楼主用的是 ADC_SampleTime_181Cycles5, 181.5 cycles。按照上面的公式算应该是15us转换 一次。这样所有的转换完大概是120us。不知道和楼主实际测试的间隔是否接近?
谢谢你的恢复,这个我真是没想到,我修改下实验试试。
版主:谢谢你,之前一直是进不了中断中,现在已经找到问题所在了,是TIM4的比较捕获的上升沿触发AD转换没有正确触发,我用软件触发就能进入中断,具体修改TIM4的比较捕获的上升沿触发AD转换正在摸索调试中。