1. 对应于开发实例1,若需要定时器TIM3的分辨率达到0.1ms,延迟时间为1s,定时器时钟为72MHz,那么定时器的预分频寄存器值和自动装载寄存器的值分别为多少?并对定时器参数配置程序进行修改。 RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); TIM_TimeBaseStructure.TIM_Prescaler =35999; TIM_TimeBaseStructure.TIM_Period =999; TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); TIM_ClearFlag(TIM2,TIM_FLAG_Update); TIM_Cmd(TIM2, ENABLE); While(TIM_GetFlagstatus(TIM2, TIM_FLAG_Update)==RESET); TIM_Cmd(TIM2, DISABLE);