中断实验不是在中断函数中清中断，
stm32的usart接收中断中就清中断

CAN也可以是查询接收，所以不用清除中断。这个要看程序了。如果是中断，必须清除中断标志位。

回复第 2 楼 于2011-11-25 13:06:52发表:
CAN也可以是查询接收，所以不用清除中断。这个要看程序了。如果是中断，必须清除中断标志位。 

就用的中断方式，固件库中can接收中断中并没有清中断啊
 
 
但在main.c中有关中断
 
固件库中程序：

#ifndef STM32F10X_CL
[url=mkMSITStore:G:\Documents%20and%20Settings\chenzongxi\桌面\STM32固件库例程\固件库\STM32F10x_StdPeriph_Lib_V3.5.0\stm32f10x_stdperiph_lib_um.chm::/group__CAN__LoopBack.html#gaf57bde854fa2b396f29664995a502b19]00155[/url] void [url=mkMSITStore:G:\Documents%20and%20Settings\chenzongxi\桌面\STM32固件库例程\固件库\STM32F10x_StdPeriph_Lib_V3.5.0\stm32f10x_stdperiph_lib_um.chm::/group__CAN__LoopBack.html#gaf57bde854fa2b396f29664995a502b19]USB_LP_CAN1_RX0_IRQHandler[/url](void)
00156 #else
00157 void [url=mkMSITStore:G:\Documents%20and%20Settings\chenzongxi\桌面\STM32固件库例程\固件库\STM32F10x_StdPeriph_Lib_V3.5.0\stm32f10x_stdperiph_lib_um.chm::/group__CAN__DualCAN.html#ga4dcf621094d563287c456f7aa751e86b]CAN1_RX0_IRQHandler[/url](void)
00158 #endif
00159 {
00160   [url=mkMSITStore:G:\Documents%20and%20Settings\chenzongxi\桌面\STM32固件库例程\固件库\STM32F10x_StdPeriph_Lib_V3.5.0\stm32f10x_stdperiph_lib_um.chm::/structCanRxMsg.html]CanRxMsg[/url] [url=mkMSITStore:G:\Documents%20and%20Settings\chenzongxi\桌面\STM32固件库例程\固件库\STM32F10x_StdPeriph_Lib_V3.5.0\stm32f10x_stdperiph_lib_um.chm::/group__CAN__DualCAN.html#ga1570d2d5a1aef132c12627cc2789f6aa]RxMessage[/url];
00161
00162   RxMessage.[url=mkMSITStore:G:\Documents%20and%20Settings\chenzongxi\桌面\STM32固件库例程\固件库\STM32F10x_StdPeriph_Lib_V3.5.0\stm32f10x_stdperiph_lib_um.chm::/structCanRxMsg.html#a62769e18836146f71238bee6b43b531e]StdId[/url]=0x00;
00163   RxMessage.[url=mkMSITStore:G:\Documents%20and%20Settings\chenzongxi\桌面\STM32固件库例程\固件库\STM32F10x_StdPeriph_Lib_V3.5.0\stm32f10x_stdperiph_lib_um.chm::/structCanRxMsg.html#a1fdca10d31c81eea2ccef41d2aced562]ExtId[/url]=0x00;
00164   RxMessage.[url=mkMSITStore:G:\Documents%20and%20Settings\chenzongxi\桌面\STM32固件库例程\固件库\STM32F10x_StdPeriph_Lib_V3.5.0\stm32f10x_stdperiph_lib_um.chm::/structCanRxMsg.html#a83a67d1a709cc01570ce956e5adc811f]IDE[/url]=0;
00165   RxMessage.[url=mkMSITStore:G:\Documents%20and%20Settings\chenzongxi\桌面\STM32固件库例程\固件库\STM32F10x_StdPeriph_Lib_V3.5.0\stm32f10x_stdperiph_lib_um.chm::/structCanRxMsg.html#abf77d3abf9ad290c08cdfd5d99ebc745]DLC[/url]=0;
00166   RxMessage.[url=mkMSITStore:G:\Documents%20and%20Settings\chenzongxi\桌面\STM32固件库例程\固件库\STM32F10x_StdPeriph_Lib_V3.5.0\stm32f10x_stdperiph_lib_um.chm::/structCanRxMsg.html#a5afe39d8e295659eeb3030593828b96a]FMI[/url]=0;
00167   RxMessage.Data[0]=0x00;
00168   RxMessage.Data[1]=0x00;
00169
00170   CAN_Receive(CAN1, CAN_FIFO0, &RxMessage);
00171
00172   if((RxMessage.ExtId==0x1234) && (RxMessage.IDE==CAN_ID_EXT)
00173      && (RxMessage.DLC==2) && ((RxMessage.Data[1]|RxMessage.Data[0]

中断标志位，我记得是有两种类型的，在STM32的英文文档中有过描述，但是不记得是哪个文档
1、手动清除中断标志位，需要软件清除的
2、自动清除中断标志位，硬件自动清除的。