這幾天一直在使用STM32來寫sensorless BLDC的驅動框架，那麼必須會用到TIM1的CCR1/CCR2/CCR3產生的六路互補PWM，以及用CCR4來產生一個中斷，用來在PWM-ON的時候產生中斷進行過零檢測，以及相電流的檢測等。
這幾天一直在測試PWM，CCR4的中斷，ADC1的采樣觸發+DMA等功能，現在也了解的差不多了，先記錄下來，先看下我的一些設置，TIM1設置：
TIM_TimeBaseStructure.TIM_Period = TIM_TimeBaseStructure.TIM_Prescaler = TIM_TimeBaseStructure.TIM_CounterMode = TIM_TimeBaseStructure.TIM_ClockDivision = TIM_TimeBaseStructure.TIM_RepetitionCounter = TIM_TimeBaseInit(TIM1, &
TIM_BDTRInitStructure.TIM_OSSRState = TIM_BDTRInitStructure.TIM_OSSIState = TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_BDTRInitStructure.TIM_DeadTime = TIM_BDTRInitStructure.TIM_Break = TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_BDTRConfig(TIM1, &
TIM_OCInitStructure.TIM_OCMode = TIM_OCInitStructure.TIM_OutputState = TIM_OCInitStructure.TIM_OutputNState = TIM_OCInitStructure.TIM_Pulse = TIM_OCInitStructure.TIM_OCPolarity = TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCInitStructure.TIM_OCIdleState = TIM_OCInitStructure.TIM_OCNIdleState =
TIM_OC1Init(TIM1, &
TIM_OCInitStructure.TIM_Pulse = TIM_OC2Init(TIM1, &
TIM_OCInitStructure.TIM_Pulse = TIM_OC3Init(TIM1, &
TIM_OCInitStructure.TIM_OutputState = TIM_OCInitStructure.TIM_Pulse = TIM_OCInitStructure.TIM_OCIdleState = TIM_OC4Init(TIM1, &
TIM_CtrlPWMOutputs(TIM1, ENABLE);
ADC1設置，這裡采用規則通道+DMA+軟件觸發，注入通道+CCR4事件觸發：
ADC_InitStructure.ADC_Mode = ADC_InitStructure.ADC_ScanConvMode = ADC_InitStructure.ADC_ContinuousConvMode = ADC_InitStructure.ADC_ExternalTrigConv = ADC_InitStructure.ADC_DataAlign = ADC_InitStructure.ADC_NbrOfChannel = ADC_Init(ADC1, &
ADC_RegularChannelConfig(ADC1,ADC_Channel_0,,ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1,ADC_Channel_1,,ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1,ADC_Channel_2,,ADC_SampleTime_239Cycles5);
ADC_RegularChannelConfig(ADC1,ADC_Channel_10 , ADC_RegularChannelConfig(ADC1,ADC_Channel_Vrefint,
ADC_InjectedSequencerLengthConfig(ADC1, ADC_InjectedChannelConfig(ADC1,ADC_Channel_TempSensor,,ADC_SampleTime_7Cycles5);
ADC_ExternalTrigInjectedConvConfig(ADC1, ADC_ExternalTrigInjecConv_T1_CC4);
ADC_ITConfig(ADC1,ADC_IT_JEOC,ENABLE);
ADC_Cmd(ADC1, ENABLE);
另外我還加了一個注入通道采樣結束的中斷，用來快速處理相電流的一些問題，比如限流、過流的處理。
測試從發現如果把CCR4的pulse設為0，那麼就不會觸發ADC1的注入采樣，也就不會產生ADC的中斷，只有pluse設置為一定的有效數值，那麼adc注入通道的采樣才會被觸發。
