STM32 直流无刷电机控制PWM电流同步采样
如何实现在PWM的中心位置采样电流？？下面是我的初始化代码1 /* Time Base configuration ,init time1 freq*/
2 TIM_TimeBaseStructure.TIM_Period = Period;
3 TIM_TimeBaseStructure.TIM_Prescaler = 0;
4 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
5 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
6 TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
7 TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
8
9 /* Automatic Output enable, Break, dead time and lock configuration*/
10 TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
11 TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
12 TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
13 TIM_BDTRInitStructure.TIM_DeadTime = 0;
14 TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
15 TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
16 TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
17 TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
18
19 /*pwm driver set ，channel 1,2,3,4set pwm mode*/
20 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
21 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Disable;
22 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;
23 TIM_OCInitStructure.TIM_Pulse = 5;
24 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
25 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
26 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
27 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Set;
28 //set OC1/OC1N
29 TIM_OC1Init(TIM1, &TIM_OCInitStructure);
30 //set oc2/oc2n
31 TIM_OCInitStructure.TIM_Pulse = 0;
32 TIM_OC2Init(TIM1, &TIM_OCInitStructure);
33 //set OC3/OC3N
34 TIM_OCInitStructure.TIM_Pulse = 0;
35 TIM_OC3Init(TIM1, &TIM_OCInitStructure);
36 //set adc sample time
37 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 38 TIM_OCInitStructure.TIM_Pulse = 0;
39 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
40 TIM_OC4Init(TIM1, &TIM_OCInitStructure);
41
42 //enable interrupt
43 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 44 TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE);
45 TIM_ITConfig(TIM1, TIM_IT_COM,ENABLE);
46
47 /* BLDC_TIMER_NUM counter enable */
48 TIM_Cmd(TIM1, ENABLE);
49
50 /* Main Output Enable */
51 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：
1 ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
2 ADC_InitStructure.ADC_ScanConvMode = ENABLE;
3 ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
4 ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
5 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
6 ADC_InitStructure.ADC_NbrOfChannel = 5;
7 ADC_Init(ADC1, &ADC_InitStructure);
8
9 ADC_TempSensorVrefintCmd(ENABLE);
10 ADC_RegularChannelConfig(ADC1,ADC_Channel_0,1,ADC_SampleTime_239Cycles5);//hand
11 ADC_RegularChannelConfig(ADC1,ADC_Channel_1,2,ADC_SampleTime_239Cycles5);//external temperature
12 ADC_RegularChannelConfig(ADC1,ADC_Channel_2,3,ADC_SampleTime_239Cycles5);//vol
13 ADC_RegularChannelConfig(ADC1,ADC_Channel_10 ,4,ADC_SampleTime_239Cycles5);
14 ADC_RegularChannelConfig(ADC1,ADC_Channel_Vrefint,5,ADC_SampleTime_239Cycles5);
15 //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
16 //下面是注入通道，这里注入通道设置成TIM1的CCR4事件触发
17 ADC_InjectedSequencerLengthConfig(ADC1, 1);
18 ADC_InjectedChannelConfig(ADC1,ADC_Channel_TempSensor,1,ADC_SampleTime_7Cycles5);//CURRENT
19 ADC_ExternalTrigInjectedConvConfig(ADC1, ADC_ExternalTrigInjecConv_T1_CC4);//这个可以使用time1的CCR4事件来触发采样
20 ADC_ExternalTrigInjectedConvCmd(ADC1,ENABLE);
21
22 ADC_ITConfig(ADC1,ADC_IT_JEOC,ENABLE);//ENABLE INJECTED INTERRUPT
23 /* Enable automatic injected conversion start after regular one */
24 //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
25
26
27 ADC_DMACmd(ADC1, ENABLE);
28
29 ADC_Cmd(ADC1, ENABLE);
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