TIM_TimeBaseInitTypeDefTIM_TimeBaseStructure;
TIM_DeInit(TIM2);
TIM_TimeBaseStructure.TIM_Period=1000;
TIM_TimeBaseStructure.TIM_Prescaler=36000-1; //36000分频，2KHz
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure);
TIM_ClearFlag(TIM2,TIM_FLAG_Update);
TIM_Cmd(TIM2,ENABLE);
对TIM2这样定义计数器是可以计数的。对TIM1这样定义就不会计数。不知道怎么解决 |
