STM32F103 输入捕获

                             最近这几周各种考试，各种课程设计，唉，我得复习复习了，所以啦，博客暂停直到6-25之后继续更新，欢迎阅读。

 

STM32F103 输入捕获信号：

 

/*--------------------------------------------------------------------------- * Project: Time.h * Name: zwp * Date: 2014/6 *---------------------------------------------------------------------------*/    #ifndef TIME_H_ #define TIME_H_  #include "stm32f10x.h"    /* ** ¶¨Ê±Æ÷2ͨµÀ1ÊäÈ벶»ñÅäÖà  */ void TIM2_Cap_Init(u16 arr, u16 psc);  /* ** ¶¨Ê±Æ÷5ÖжϷþÎñ³ÌÐò  */ void TIM2_IRQHandler(void);     #endif  

 

 

/*------------------------------------------------------------------------------- * Project: Time.c * Name: zwp * Date: 2014/6 *-----------------------------------------------------------------------------*/    #include "Time.h"    TIM_ICInitTypeDef TIM2_ICInitStructure;   /* ** ¶¨Ê±Æ÷2ͨµÀ1ÊäÈ벶»ñÅäÖà  */ void TIM2_Cap_Init(u16 arr, u16 psc) { GPIO_InitTypeDef GPIO_InitStructure; TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; NVIC_InitTypeDef NVIC_InitStructure;  /* ʹÄÜTIM2 ʱÖÓ */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); /* ʹÄÜGPIOAʱÖÓ */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);  /* ÉèÖÃÒý½Å */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; GPIO_Init(GPIOA, &GPIO_InitStructure); /* PA0 ÏÂÀ­ */ GPIO_ResetBits(GPIOA, GPIO_Pin_0);   /* ³õʼ»¯¶¨Ê±Æ÷2TIM2 */ TIM_TimeBaseStructure.TIM_Period = arr;// É趨¼ÆÊýÆ÷×Ô¶¯ÖØ×°Öµ TIM_TimeBaseStructure.TIM_Prescaler = psc;// Ô¤·ÖƵÆ÷ TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;// ÉèÖÃʱÖÓ·Ö¸î TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; // ÏòÉϼÆÊý TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);// ³õʼ»¯TIMxµÄʱ¼ä»ùÊýµ¥Î»  /* ³õʼ»¯TIM2 ÊäÈ벶»ñ²ÎÊý */ TIM2_ICInitStructure.TIM_Channel = TIM_Channel_1;// Ñ¡ÔñÊäÈë¶ËIC1ÒþÉäµ½TI1ÉÏ TIM2_ICInitStructure.TIM_ICPolarity  = TIM_ICPolarity_Rising;// ÉÏÉýÑز¶»ñ TIM2_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;// ÒþÉäµ½TI1ÉÏ TIM2_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;// ÅäÖÃÊäÈë·ÖƵ£¬²»·ÖƵ TIM2_ICInitStructure.TIM_ICFilter = 0x00;// ÅäÖÃÊäÈëÂ˲¨Æ÷ ²»Â˲¨ TIM_ICInit(TIM2, &TIM2_ICInitStructure);  /* ÖжϷÖ×é³õʼ»¯ */ NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;// TIM2 ÖÐ¶Ï NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;// ÏÈÕ¼ÓÅÏȼ¶2 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;// ×ÓÓÅÏȼ¶0¼¶ NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;// IRQͨµÀ±»Ê¹ÄÜ NVIC_Init(&NVIC_InitStructure);// ³õʼ»¯ÍþÉåNVIC¼Ä´æÆ÷  /* ÔÊÐí¸üÐÂÖжÏCC1IE²¶»ñÖÐ¶Ï */ TIM_ITConfig(TIM2, TIM_IT_Update|TIM_IT_CC1, ENABLE); /* ʹÄܶ¨Ê±Æ÷ 2 */ TIM_Cmd(TIM2, ENABLE);    }   u8 TIM2CH1_CAPTURE_STA = 0;// ÊäÈ벶»ñ״̬ u16 TIM2CH1_CAPTURE_VAL; // ÊäÈ벶»ñÖµ  /* ** ¶¨Ê±Æ÷5ÖжϷþÎñ³ÌÐò  */ void TIM2_IRQHandler(void) { if((TIM2CH1_CAPTURE_STA & 0x80) == 0)// »¹Î´³É¹¦²¶»ñ { if(TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET) { if(TIM2CH1_CAPTURE_STA & 0x40)// ÒѾ­²¶»ñµ½¸ßµçƽ { if((TIM2CH1_CAPTURE_STA & 0x3f) == 0x3F)// ¸ßµçƽ̫³¤ÁË {TIM2CH1_CAPTURE_STA |= 0x80;TIM2CH1_CAPTURE_VAL = 0xFFFF; }  elseTIM2CH1_CAPTURE_STA++;  } } if(TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)// ²¶»ñ1·¢Éú²¶»ñʼþ { if(TIM2CH1_CAPTURE_STA & 0x40)// ²¶»ñµ½Ò»¸öϽµÑØ { TIM2CH1_CAPTURE_STA |= 0x80;// ´Ó±ê¼Ç³É¹¦²¶»ñµ½Ò»´ÎÉÏÉýÑØ TIM2CH1_CAPTURE_VAL = TIM_GetCapture1(TIM2); /* CC1P = 0 ÉèÖÃΪÉÏÉýÑز¶»ñ */ TIM_OC1PolarityConfig(TIM2, TIM_ICPolarity_Rising);  } else/* »¹Î´¿ªÊ¼µÚÒ»´Î²¶»ñÉÏÉýÑØ */ { TIM2CH1_CAPTURE_STA = 0; TIM2CH1_CAPTURE_VAL = 0; TIM_SetCounter(TIM2, 0); TIM2CH1_CAPTURE_STA |= 0x40;// ±ê¼Ç²¶»ñµ½ÁËÉÏÉýÑØ TIM_OC1PolarityConfig(TIM2, TIM_ICPolarity_Falling);// ÉèÖÃΪϽµÑز¶»ñ }  }}TIM_ClearITPendingBit(TIM2, TIM_IT_CC1|TIM_IT_Update);// Çå³ýÖжϱê־λ  }   

注释字体乱码了，可能是编码格式不同吧！认真看，因该能看懂。

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