tim配置如下
TIM_TimeBaseStructure.TIM_Period = 250;//自动重装值
TIM_TimeBaseStructure.TIM_Prescaler = 179;//予分频
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Down;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM_ARRPreloadConfig(TIM3,ENABLE); //允许重装 TIM_Period
//TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);//允许更新中断
TIM_SelectOutputTrigger(TIM3,TIM_TRGOSource_Enable);//更新输出 trgo
TIM_Cmd(TIM3, ENABLE); //TIM3 运行
AD配置如下
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //ADC1,ADC2独立工作
ADC_InitStructure.ADC_ScanConvMode = ENABLE; //多信道工作
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE ; //单次转换 ENABLE;
ADC_InitStructure.ADC_ExternalTrigConv =ADC_ExternalTrigConv_T3_TRGO ;//触发源 ADC_ExternalTrigConv_T3_TRGO ;ADC_ExternalTrigConv_None
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //数据右对齐
ADC_InitStructure.ADC_NbrOfChannel = 6;//指定规则通道数
ADC_Init(ADC1, &ADC_InitStructure); //初始化
ad总是无法启动,郁闷
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