STM32 TIM1触发ADC采样问题

leehyoung · 发表于 2017-12-8 12:40:33

我的TIM1设置输出两对互补的40kHz的PWM信号，这个测了没有问题，然后想用TIM1同时来触发ADC，采样一路信号AIN1,
但是为什么再等待ADC转换结束的信号一直没有等到呢？
void TIM1_PWM_Init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);

GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_8 | GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;          //
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_13 | GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;          //
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);

TIM_TimeBaseInitStructure.TIM_Period=1799; 72000000/1800=40Khz
TIM_TimeBaseInitStructure.TIM_Prescaler=0;
TIM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseInitStructure);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState =TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse =300;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity =TIM_OCNPolarity_High; // ??????
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
TIM_OC1Init(TIM1,&TIM_OCInitStructure);

TIM_SelectOutputTrigger(TIM1, TIM_TRGOSource_Update);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse =1200;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity =TIM_OCNPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
TIM_OC2Init(TIM1,&TIM_OCInitStructure);

TIM_BDTRInitStructure.TIM_AutomaticOutput=TIM_AutomaticOutput_Enable;
TIM_BDTRInitStructure.TIM_Break=TIM_Break_Disable;//TIM_Break_Enable;
TIM_BDTRInitStructure.TIM_BreakPolarity=TIM_BreakPolarity_High;
TIM_BDTRInitStructure.TIM_DeadTime=28;
TIM_BDTRInitStructure.TIM_LOCKLevel=TIM_LOCKLevel_OFF;
TIM_BDTRInitStructure.TIM_OSSIState=TIM_OSSIState_Disable;//TIM_OSSIState_Disable;//TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_OSSRState=TIM_OSSRState_Disable;//TIM_OSSRState_Disable;//TIM_OSSRState_Enable;
TIM_BDTRConfig(TIM1,&TIM_BDTRInitStructure);
TIM_ARRPreloadConfig(TIM1,ENABLE);
TIM_CtrlPWMOutputs(TIM1,ENABLE);//MOE=1,??OC?OCN??
TIM_Cmd(TIM1,ENABLE);

}

void  Adc_Init(void)
{
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_ADC1 , ENABLE );

RCC_ADCCLKConfig(RCC_PCLK2_Div6); // 72M/6=12M

//PA1 模拟输入
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure);

ADC_DeInit(ADC1);  //复位ADC

ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //
ADC_InitStructure.ADC_ScanConvMode = DISABLE; //单通道
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //单次转换
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); //

ADC_RegularChannelConfig(ADC1,1,1,ADC_SampleTime_1Cycles5);
ADC_ExternalTrigConvCmd(ADC1,ENABLE); //ENABLE ADC1
ADC_Cmd(ADC1, ENABLE);

ADC_ResetCalibration(ADC1);

while(ADC_GetResetCalibrationStatus(ADC1));

ADC_StartCalibration(ADC1);

while(ADC_GetCalibrationStatus(ADC1));

// ADC_SoftwareStartConvCmd(ADC1, ENABLE);

}

在main函数里等待
while(1) {
   while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));
   LED0=!LED0;
}

一直不会执行LED0=!LED0,也就是ADC没有转换完成

大家帮我看一下哪里设置的有问题啊？