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- 2018-12-13
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- 10 小时
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1金钱
void Timerx_Init(u16 arr,u16 psc)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
TIM_TimeBaseStructure.TIM_Period = 9999; //éèÖÃÔúÏÂò»¸ö¸üDÂê¼t×°èë»î¶ˉμÄ×Ô¶ˉÖØ×°ÔØ¼Ä′æÆ÷ÖüÆúμÄÖμ ¼Æêyμ½5000Îa500ms 9999
TIM_TimeBaseStructure.TIM_Prescaler =(7200-1); //éèÖÃóÃà′×÷ÎaTIMxê±ÖóÆμÂê3yêyμÄÔ¤·ÖÆμÖμ 10KhzμļÆêyÆμÂê
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //éèÖÃê±Öó·Ö¸î:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIMÏòéϼÆêyÄ£ê½
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); //¸ù¾YTIM_TimeBaseInitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉTIMxμÄê±¼ä»ùêyμ¥λ
/* TIM IT enable */
TIM_ITConfig( //ê1Äü»òÕßê§ÄüÖ¸¶¨μÄTIMÖD¶Ï
TIM3, //TIM2
TIM_IT_Update | //TIM ÖD¶ÏÔ′
TIM_IT_Trigger, //TIM ′¥·¢ÖD¶ÏÔ′
ENABLE //ê1Äü
);
/* Enable the TIM3 global Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; //TIM3ÖD¶Ï
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //ÏèÕ¼óÅÏè¼¶0¼¶
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //′óóÅÏè¼¶3¼¶
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μà±»ê1Äü
NVIC_Init(&NVIC_InitStructure); //¸ù¾YNVIC_InitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèNVIC¼Ä′æÆ÷
TIM_Cmd(TIM3, ENABLE); //ê1ÄüTIMxíaéè
这个TIM_ITConfig()开启定时器中断函数 为啥可以写两个(这是我师兄的一个程序)TIM_IT_Update | TIM_IT_Trigger,
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