stm32單個定時器多通道輸入捕獲

這是用stm32的timer2的通道3和通道4同事捕獲ｐｗｍ訊號，顯示高電平的時間，在keil4.7中編譯。

tim_icinittypedef tim2_icinitstructure;  

/* ** ¶¨ê±æ÷2í¨µà1êäè벶»ñåäöã 
*/ 
void tim2_cap_init(u16 arr, u16 psc) 
/* ** ¶¨ê±æ÷2öð¶ï·þîñ³ìðò 
*/ 
void tim2_irqhandler(void) 
else 
tim2ch3_capture_sta++; 
} 
} if(tim_getitstatus(tim2, tim_it_cc3) != reset) // ²¶»ñ1·¢éú²¶»ñêâ¼þ 
else /* »¹î´¿ªê¼µúò»´î²¶»ñéïéýñø */ 
} }
if((tim2ch4_capture_sta & 0x80) == 0) // »¹î´³é¹¦²¶»ñ 
else 
tim2ch4_capture_sta++; 
} 
} if(tim_getitstatus(tim2, tim_it_cc4) != reset) // ²¶»ñ1·¢éú²¶»ñêâ¼þ 
else /* »¹î´¿ªê¼µúò»´î²¶»ñéïéýñø */ 
} }
tim_clearitpendingbit(tim2, tim_it_cc3|tim_it_cc4|tim_it_update); // çå³ýöð¶ï±êö¾î» 
} ／／主函式u8 tim2ch3_capture_sta = 0; // êäè벶»ñ×´ì¬ 
u16 tim2ch3_capture_val; // êäè벶»ñöµ 
u8 tim2ch4_capture_sta = 0; // êäè벶»ñ×´ì¬ 
u16 tim2ch4_capture_val; // êäè벶»ñöµ 
void tim2_cap_init(u16 arr,u16 psc);
int main(void)
if(tim2ch4_capture_sta&0x80)//³é¹¦²¶»ñµ½áëò»´îéïéýñø
stdelay_ms(100);
}}

在測試程式的時候遇到了乙個問題，在tim2_cap_init() 函式中，如果用

tim2_icinitstructure.tim_channel = tim_channel_3 | tim_channel_4; 

tim2_icinitstructure.tim_icpolarity = tim_icpolarity_rising;
tim2_icinitstructure.tim_icselection = tim_icselection_directti;
tim2_icinitstructure.tim_icprescaler = tim_icpsc_div1; 
tim2_icinitstructure.tim_icfilter = 0x00; 
tim_icinit(tim2, &tim2_icinitstructure);

來代替下面的初始化程式程式會卡在乙個地方出不來或者執行的有問題，不知道怎麼回事，當時也沒有深究。。。。

tim2_icinitstructure.tim_channel = tim_channel_3  

tim2_icinitstructure.tim_icpolarity = tim_icpolarity_rising;
tim2_icinitstructure.tim_icselection = tim_icselection_directti;
tim2_icinitstructure.tim_icprescaler = tim_icpsc_div1; 
tim2_icinitstructure.tim_icfilter = 0x00; 
tim_icinit(tim2, &tim2_icinitstructure); 
tim2_icinitstructure.tim_channel = tim_channel_4; 
tim2_icinitstructure.tim_icpolarity = tim_icpolarity_rising;
tim2_icinitstructure.tim_icselection = tim_icselection_directti;
tim2_icinitstructure.tim_icprescaler = tim_icpsc_div1; 
tim2_icinitstructure.tim_icfilter = 0x00; 
tim_icinit(tim2, &tim2_icinitstructure);

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