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- 金钱
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- 注册时间
- 2019-7-9
- 在线时间
- 13 小时
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1金钱
TIM_ICInitTypeDef TIM2_ICInitStructure;
void TIM2_Cap_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //ê1ÄüTIM2ê±Öó
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //ê1ÄüGPIOAê±Öó
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; //PA0 Çå3y֮ǰéèÖÃ
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PA0 êäèë
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_ResetBits(GPIOA,GPIO_Pin_1); //PA0 ÏÂà-
//3õê¼»ˉ¶¨ê±Æ÷2 TIM2
TIM_TimeBaseStructure.TIM_Period = arr; //é趨¼ÆêyÆ÷×Ô¶ˉ֨װÖμ
TIM_TimeBaseStructure.TIM_Prescaler =psc; //Ô¤·ÖÆμÆ÷
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //éèÖÃê±Öó·Ö¸î:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //TIMÏòéϼÆêyÄ£ê½
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //¸ù¾YTIM_TimeBaseInitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉTIMxμÄê±¼ä»ùêyμ¥λ
//3õê¼»ˉTIM2êäèë2¶»ñ2Îêy
TIM2_ICInitStructure.TIM_Channel = TIM_Channel_2; //CC1S=01 Ñ¡Ôñêäèë¶Ë IC1ó3éäμ½TI1éÏ
TIM2_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //éÏéyÑØ2¶»ñ
TIM2_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //ó3éäμ½TI1éÏ
TIM2_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //ÅäÖÃêäèë·ÖÆμ,2»·ÖÆμ
TIM2_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 ÅäÖÃêäèëÂË2¨Æ÷ 2»ÂË2¨
TIM_ICInit(TIM2, &TIM2_ICInitStructure);
//ÖD¶Ï·Ö×é3õê¼»ˉ
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn; //TIM2ÖD¶Ï
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; //ÏèÕ¼óÅÏè¼¶2¼¶
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //′óóÅÏè¼¶0¼¶
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μà±»ê1Äü
NVIC_Init(&NVIC_InitStructure); //¸ù¾YNVIC_InitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèNVIC¼Ä′æÆ÷
TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_CC2,ENABLE);//ÔêDí¸üDÂÖD¶Ï ,ÔêDíCC1IE2¶»ñÖD¶Ï
TIM_Cmd(TIM2,ENABLE ); //ê1Äü¶¨ê±Æ÷2
}
u8 TIM2CH2_CAPTURE_STA=0; //êäèë2¶»ñ×′ì¬
u16 TIM2CH2_CAPTURE_VAL; //êäèë2¶»ñÖμ
//¶¨ê±Æ÷5ÖD¶Ï·tÎñ3ìDò
void TIM2_IRQHandler(void)
{
if((TIM2CH2_CAPTURE_STA&0X80)==0)//»1Î′3é1|2¶»ñ
{
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
{
if(TIM2CH2_CAPTURE_STA&0X40)//òѾ-2¶»ñμ½¸ßμçÆ½áË
{
if((TIM2CH2_CAPTURE_STA&0X3F)==0X3F)//¸ßμçÆ½ì«3¤áË
{
TIM2CH2_CAPTURE_STA|=0X80;//±ê¼Ç3é1|2¶»ñáËò»′Î
TIM2CH2_CAPTURE_VAL=0XFFFF;
}else TIM2CH2_CAPTURE_STA++;
}
}
if (TIM_GetITStatus(TIM2, TIM_IT_CC2) != RESET)//2¶»ñ1·¢éú2¶»ñê¼t
{
if(TIM2CH2_CAPTURE_STA&0X40) //2¶»ñμ½ò»¸öϽμÑØ
{
TIM2CH2_CAPTURE_STA|=0X80; //±ê¼Ç3é1|2¶»ñμ½ò»′ÎéÏéyÑØ
TIM2CH2_CAPTURE_VAL=TIM_GetCapture1(TIM2);
TIM_OC2PolarityConfig(TIM2,TIM_ICPolarity_Rising); //CC1P=0 éèÖÃÎaéÏéyÑØ2¶»ñ
}else //»1Î′¿aê¼,μúò»′Î2¶»ñéÏéyÑØ
{
TIM2CH2_CAPTURE_STA=0; //Çå¿Õ
TIM2CH2_CAPTURE_VAL=0;
TIM_SetCounter(TIM2,0);
TIM2CH2_CAPTURE_STA|=0X40; //±ê¼Ç2¶»ñμ½áËéÏéyÑØ
TIM_OC2PolarityConfig(TIM2,TIM_ICPolarity_Falling); //CC1P=1 éèÖÃÎaϽμÑØ2¶»ñ
}
}
}
TIM_ClearITPendingBit(TIM2, TIM_IT_CC2|TIM_IT_Update); //Çå3yÖD¶Ï±ê־λ
}
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最佳答案
查看完整内容[请看2#楼]
1,改IO。
2,改TIM通道。
依葫芦画瓢,没有什么难度。
搞不定就花多一些时间,一天不行一周。
肯定可以。
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