【stm32】用TIM1产生6路ADC，用CCR4触发ADC1的注入通道采样

这几天一直在使用STM32来写sensorless BLDC的驱动框架，那么必须会用到TIM1的CCR1/CCR2/CCR3产生的六路互补PWM，以及用CCR4来产生一个中断，用来在PWM-ON的时候产生中断进行过零检测，以及相电流的检测等。

这几天一直在测试PWM，CCR4的中断，ADC1的采样触发+DMA等功能，现在也了解的差不多了，先记录下来，先看下我的一些设置，TIM1设置：

   /* Time Base configuration ,init time1 freq*/
     TIM_TimeBaseStructure.TIM_Period = Period;
     TIM_TimeBaseStructure.TIM_Prescaler = ;
     TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
     TIM_TimeBaseStructure.TIM_ClockDivision = ;
     TIM_TimeBaseStructure.TIM_RepetitionCounter = ;
     TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

     /* Automatic Output enable, Break, dead time and lock configuration*/
     TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
     TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
     TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
     TIM_BDTRInitStructure.TIM_DeadTime = ;
     TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
     TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
     TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
     TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);

     /*pwm driver set ，channel 1,2,3,4set pwm mode*/
     TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
     TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable;
     TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;
     TIM_OCInitStructure.TIM_Pulse = ;
     TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
     TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
     TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
     TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Set;
     //set OC1/OC1N
     TIM_OC1Init(TIM1, &TIM_OCInitStructure);
     //set oc2/oc2n
     TIM_OCInitStructure.TIM_Pulse = ;
     TIM_OC2Init(TIM1, &TIM_OCInitStructure);
     //set OC3/OC3N
     TIM_OCInitStructure.TIM_Pulse = ;
     TIM_OC3Init(TIM1, &TIM_OCInitStructure);
     //set adc sample time
     TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//CCR4这个输出使能后才能用来触发ADC1的注入通道采样
     TIM_OCInitStructure.TIM_Pulse = ;
     TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
     TIM_OC4Init(TIM1, &TIM_OCInitStructure);

     //enable interrupt
     TIM_ITConfig(TIM1, TIM_IT_CC4, ENABLE);　　//CCR4的中断，这个通过设置CCR4的pulse来控制产生中断相当于PWM-ON的位置
     TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE);
     TIM_ITConfig(TIM1, TIM_IT_COM,ENABLE);

     /* BLDC_TIMER_NUM counter enable */
     TIM_Cmd(TIM1, ENABLE);

     /* Main Output Enable */
     TIM_CtrlPWMOutputs(TIM1, ENABLE);

　　ADC1设置，这里采用规则通道+DMA+软件触发，注入通道+CCR4事件触发：

     ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
     ADC_InitStructure.ADC_ScanConvMode = ENABLE;
     ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
     ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
     ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
     ADC_InitStructure.ADC_NbrOfChannel = ;
     ADC_Init(ADC1, &ADC_InitStructure);

     ADC_TempSensorVrefintCmd(ENABLE);
     ADC_RegularChannelConfig(ADC1,ADC_Channel_0,,ADC_SampleTime_239Cycles5);//hand
     ADC_RegularChannelConfig(ADC1,ADC_Channel_1,,ADC_SampleTime_239Cycles5);//external temperature
     ADC_RegularChannelConfig(ADC1,ADC_Channel_2,,ADC_SampleTime_239Cycles5);//vol
     ADC_RegularChannelConfig(ADC1,ADC_Channel_10 ,,ADC_SampleTime_239Cycles5);
     ADC_RegularChannelConfig(ADC1,ADC_Channel_Vrefint,,ADC_SampleTime_239Cycles5);
     //上面规则通道的设置，注意采样时间，我发现如果时间设置过的可能数据会互相干扰
     //下面是注入通道，这里注入通道设置成TIM1的CCR4事件触发
     ADC_InjectedSequencerLengthConfig(ADC1, );
     ADC_InjectedChannelConfig(ADC1,ADC_Channel_TempSensor,,ADC_SampleTime_7Cycles5);//CURRENT
     ADC_ExternalTrigInjectedConvConfig(ADC1, ADC_ExternalTrigInjecConv_T1_CC4);//这个可以使用time1的CCR4事件来触发采样
     ADC_ExternalTrigInjectedConvCmd(ADC1,ENABLE);

     ADC_ITConfig(ADC1,ADC_IT_JEOC,ENABLE);//ENABLE INJECTED INTERRUPT
     /* Enable automatic injected conversion start after regular one */
   //  ADC_AutoInjectedConvCmd(ADC1, ENABLE);//是否在规则通道结束之后自动开始注入通道采样

     ADC_DMACmd(ADC1, ENABLE);

     ADC_Cmd(ADC1, ENABLE);

　　另外我还加了一个注入通道采样结束的中断，用来快速处理相电流的一些问题，比如限流、过流的处理。

　　测试从发现如果把CCR4的pulse设为0，那么就不会触发ADC1的注入采样，也就不会产生ADC的中断，只有pluse设置为一定的有效数值，那么adc注入通道的采样才会被触发。