STM32f107 CAN滤波器设置

素颜马尾好姑娘i 2023-02-21 14:21 28阅读 0赞

STM32f107 CAN滤波器设置

F107有CAN1、CAN2两路，其滤波设置类似

stm32f10x系列CAN滤波器：  
两种模式：***列表模式、屏蔽位模式***  
有分组\*\*，\***CAN1：0->13组，CAN2：14->28组**；

滤波器组时间是***同或***关系

以下只讨论屏蔽位模式、扩展帧滤波器

u32 ID1=0x10203008;//此ID与实际传输ID存在右移3位的关系，即实际传输ID为0x02040601
    u32 ID2=0x50607008;
    /
    //CAN1
    /
    CAN_FilterInitStructure.CAN_FilterNumber=0;	//滤波器0组				
    CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;//屏蔽位模式
    CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit;//滤波器32位
    CAN_FilterInitStructure.CAN_FilterIdHigh= (ID1&0xFFFF0000)>>16;	//取ID1高四位0x1020
    CAN_FilterInitStructure.CAN_FilterIdLow= (ID1|CAN_ID_EXT)&0xFFFF; //取ID1低四位0x3008
    CAN_FilterInitStructure.CAN_FilterMaskIdHigh= 0x00FF;		//高四位 ，FF为必须匹配，即收到的帧ID必须为0x0020	
    CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0;	//低四位	
    CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_FilterFIFO0;	
    CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;		
    CAN_FilterInit(&CAN_FilterInitStructure);		
    
    CAN_FilterInitStructure.CAN_FilterNumber=1;	//滤波器1组				
    CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;//屏蔽位模式
    CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit;//滤波器32位
    CAN_FilterInitStructure.CAN_FilterIdHigh= (ID2&0xFFFF0000)>>16;	//取ID1高四位0x5060
    CAN_FilterInitStructure.CAN_FilterIdLow= (ID2|CAN_ID_EXT)&0xFFFF; //取ID1低四位0x7008
    CAN_FilterInitStructure.CAN_FilterMaskIdHigh= 0xFFFF;		//高四位 ，FF为必须匹配，即收到的帧ID必须为0x5060	
    CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0;	//低四位	
    CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_FilterFIFO0;	
    CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;		
    CAN_FilterInit(&CAN_FilterInitStructure);	
    
    
    /
    //CAN2
    /
    CAN_FilterInitStructure.CAN_FilterNumber=14;	//滤波器14组				
    CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;//屏蔽位模式
    CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit;//滤波器32位
    CAN_FilterInitStructure.CAN_FilterIdHigh= (ID1&0xFFFF0000)>>16;	//取ID1高四位0x1020
    CAN_FilterInitStructure.CAN_FilterIdLow= (ID1|CAN_ID_EXT)&0xFFFF; //取ID1低四位0x3008
    CAN_FilterInitStructure.CAN_FilterMaskIdHigh= 0x00FF;		//高四位 ，FF为必须匹配，即收到的帧ID必须为0x0020	
    CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0;	//低四位	
    CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_FilterFIFO0;	
    CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;		
    CAN_FilterInit(&CAN_FilterInitStructure);		
    
    CAN_FilterInitStructure.CAN_FilterNumber=15;	//滤波器15组				
    CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;//屏蔽位模式
    CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit;//滤波器32位
    CAN_FilterInitStructure.CAN_FilterIdHigh= (ID2&0xFFFF0000)>>16;	//取ID1高四位0x5060
    CAN_FilterInitStructure.CAN_FilterIdLow= (ID2|CAN_ID_EXT)&0xFFFF; //取ID1低四位0x7008
    CAN_FilterInitStructure.CAN_FilterMaskIdHigh= 0xFFFF;		//高四位 ，FF为必须匹配，即收到的帧ID必须为0x5060	
    CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0;	//低四位	
    CAN_FilterInitStructure.CAN_FilterFIFOAssignment=CAN_FilterFIFO0;	
    CAN_FilterInitStructure.CAN_FilterActivation=ENABLE;		
    CAN_FilterInit(&CAN_FilterInitStructure);