我为了验证问题，在STM32F103测试上，DMA循环操作能正常运行。但在STM32L152上怎么都只能进二次中断。DMA循环操作不能执行。这个问题我都搞了一个星期了。希望得到帮助。
1.采用的3.5的库。MDK-ARM4.22A
2.DMA采用循环操作，设传半，全传中断
3.ADC用TIM1_CC1触发。采32次求平均值，用串口1，printf显示。
void ADC_DMAInit(void)
{
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* DMA1 Channel1 Configuration ----------------------------------------------*/
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ADC_RegularConvertedValueTab;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = N;
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);
/* Enable DMA1 Channel1 Transfer Complete interrupt */
DMA_ITConfig(DMA1_Channel1,DMA_IT_TC|DMA_IT_HT,ENABLE); /*使能DMA通道1传送中断*/
/*开启DMA1_Channel1通道中断控制,*/
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable DMA1 channel1 */
DMA_Cmd(DMA1_Channel1, ENABLE);
}
void TIM1_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
/* Time Base configuration */
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = 0xFF;
TIM_TimeBaseStructure.TIM_Prescaler = 720;
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
/* TIM1 channel1 configuration in PWM mode */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0x7F;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
}
void ADC_Configuration(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular channel1 configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_13Cycles5);
/* Set injected sequencer length */
ADC_InjectedSequencerLengthConfig(ADC1, 1);
/* ADC1 injected channel Configuration */
ADC_InjectedChannelConfig(ADC1, ADC_Channel_4, 1, ADC_SampleTime_71Cycles5);
/* ADC1 injected external trigger configuration */
ADC_ExternalTrigInjectedConvConfig(ADC1, ADC_ExternalTrigInjecConv_None);
/* Enable automatic injected conversion start after regular one */
ADC_AutoInjectedConvCmd(ADC1, ENABLE);
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 external trigger */
ADC_ExternalTrigConvCmd(ADC1, ENABLE);
/* Enable JEOC interrupt */
//ADC_ITConfig(ADC1, ADC_IT_JEOC, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Enable ADC1 reset calibration register */
ADC_ResetCalibration(ADC1);
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));
/* Start ADC1 calibration */
ADC_StartCalibration(ADC1);
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));
/* TIM1 counter enable */
TIM_Cmd(TIM1, ENABLE);
/* TIM1 main Output Enable */
TIM_CtrlPWMOutputs(TIM1, ENABLE);
}
/*******************************************************************************
* 函数名 : USART_Configuration
* 函数描述 : 设置USART1
* 输入参数 : None
* 输出结果 : None
* 返回值 : None
*******************************************************************************/
void USART_Configuration(void)
{
/* 定义USART初始化结构体 USART_InitStructure */
USART_InitTypeDef USART_InitStructure;
/*
* 波特率为9600bps
* 8位数据长度
* 1个停止位，无校验
* 禁用硬件流控制
* 禁止USART时钟
* 时钟极性低
* 在第2个边沿捕获数据
* 最后一位数据的时钟脉冲不从 SCLK 输出
*/
USART_InitStructure.USART_BaudRate =115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No ;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1 , &USART_InitStructure);
/* 使能USART1 */
USART_Cmd(USART1 , ENABLE);
}
void VoltComputeOnly(void)
{
uint8_t i;
if(gDmaHalfTrans==1)
{
gDmaHalfTrans=0;
sum[0]=ADC_RegularConvertedValueTab[0]; /*32次采样的上半缓存*/
for(i=1;i<32;i+=1)
{
sum[0]=sum[0]+ADC_RegularConvertedValueTab[i];
}
Value= sum[0]/32 ; /*UA采样32次的平均值*/
printf("\r\n The current AD value1 = 0x%04X \r\n", Value);
}
if(gDmaTransFinish==1)
{
gDmaTransFinish=0;
sum[0]=ADC_RegularConvertedValueTab[32]; /*32次采样的下半缓存*/
for(i=33;i<64;i+=1)
{
sum[0]=sum[0]+ADC_RegularConvertedValueTab[i];
}
Value= sum[0]/32 ; /*UA采样32次的平均值*/
printf("\r\n The current AD value2 = 0x%04X \r\n", Value);
}
} |
楼主
标题置顶
标题高亮
