/* TIM1 configuration ------------------------------------------------------*/ // Time Base configuration TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); TIM_TimeBaseStructure.TIM_Period = 0xFFFF; TIM_TimeBaseStructure.TIM_Prescaler = 0x0; 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_Timing; TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = 7500; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; TIM_OC1Init(TIM1, &TIM_OCInitStructure); TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Disable); /* DMA1 Channel1 Configuration ----------------------------------------------*/ DMA_DeInit(DMA1_Channel1); DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address; DMA_InitStructure.DMA_MemoryBaseAddr = (u32)ADC_RegularConvertedValueTab; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_BufferSize = 32; 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 */ DMA_Cmd(DMA1_Channel1, ENABLE);
/* ADC1 configuration ------------------------------------------------------*/ ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; ADC_InitStructure.ADC_ScanConvMode = ENABLE;//DISABLE; ADC_InitStructure.ADC_ContinuousConvMode =ENABLE; //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 channel14 configuration */ ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_1Cycles5);
/* Set injected sequencer length */ ADC_InjectedSequencerLengthConfig(ADC1, 1); /* ADC1 injected channel Configuration */ ADC_InjectedChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_1Cycles5); /* 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 interupt */ ADC_ITConfig(ADC1, ADC_IT_JEOC, ENABLE);
/* Enable ADC1 */ ADC_Cmd(ADC1, ENABLE);
/* Enable ADC1 reset calibaration register */ ADC_ResetCalibration(ADC1); /* Check the end of ADC1 reset calibration register */ while(ADC_GetResetCalibrationStatus(ADC1));
/* Start ADC1 calibaration */ 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);
/* Test on channel1 transfer complete flag */ while(!DMA_GetFlagStatus(DMA1_FLAG_TC1));//程序死在这 /* Clear channel1 transfer complete flag */ DMA_ClearFlag(DMA1_FLAG_TC1);
上边DMA应该没有问题,问题是在定时器用。 结果死在: while(!DMA_GetFlagStatus(DMA1_FLAG_TC1));//程序死在这
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