STM32的CAN總線過濾器的配置

stm32的can總線的配置如下：

CAN_InitStructure.CAN_TTCM=DISABLE;//禁止時(shí)間觸發(fā)通信模式
CAN_InitStructure.CAN_ABOM=DISABLE;
CAN_InitStructure.CAN_AWUM=DISABLE;
CAN_InitStructure.CAN_NART=DISABLE;//CAN報(bào)文只被發(fā)送1次，不管發(fā)送的結(jié)果如何（成功、出錯(cuò)或仲裁丟失）
CAN_InitStructure.CAN_RFLM=DISABLE;
CAN_InitStructure.CAN_TXFP=DISABLE;
CAN_InitStructure.CAN_Mode=CAN_Mode_Normal;
//CAN_Mode_LoopBack
//CAN_Mode_Normal
CAN_InitStructure.CAN_SJW=CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1=CAN_BS1_5tq;//1--16
CAN_InitStructure.CAN_BS2=CAN_BS2_2tq;//1--8
CAN_InitStructure.CAN_Prescaler=2;

CAN_Init(&CAN_InitStructure);

/* CAN filter init */
CAN_FilterInitStructure.CAN_FilterNumber=0;//選擇過濾器0
CAN_FilterInitStructure.CAN_FilterMode=CAN_FilterMode_IdMask;//指定過濾器被設(shè)置為標(biāo)識(shí)符屏蔽模式
CAN_FilterInitStructure.CAN_FilterScale=CAN_FilterScale_32bit;//給出過濾器位寬為32位

下面根據(jù)設(shè)置的參數(shù)不同來決定can總線can總線的配置情況：

1、對(duì)擴(kuò)展數(shù)據(jù)幀進(jìn)行過濾:(只接收擴(kuò)展數(shù)據(jù)幀)
CAN_FilterInitStructure.CAN_FilterIdHigh = (((u32)slave_id<<3)&0xFFFF0000)>>16;
CAN_FilterInitStructure.CAN_FilterIdLow = (((u32)slave_id<<3)|CAN_ID_EXT|CAN_RTR_DATA)&0xFFFF;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0xFFFF;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0xFFFF;
(注：標(biāo)準(zhǔn)幀數(shù)據(jù)幀、標(biāo)準(zhǔn)遠(yuǎn)程幀和擴(kuò)展遠(yuǎn)程幀均被過濾)
2、對(duì)擴(kuò)展遠(yuǎn)程幀過濾:(只接收擴(kuò)展遠(yuǎn)程幀)
CAN_FilterInitStructure.CAN_FilterIdHigh = (((u32)slave_id<<3)&0xFFFF0000)>>16;
CAN_FilterInitStructure.CAN_FilterIdLow = (((u32)slave_id<<3)|CAN_ID_EXT|CAN_RTR_REMOTE)&0xFFFF;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0xFFFF;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0xFFFF;

3、對(duì)標(biāo)準(zhǔn)遠(yuǎn)程幀過濾:(只接收標(biāo)準(zhǔn)遠(yuǎn)程幀)
CAN_FilterInitStructure.CAN_FilterIdHigh = (((u32)slave_id<<21)&0xffff0000)>>16;
CAN_FilterInitStructure.CAN_FilterIdLow = (((u32)slave_id<<21)|CAN_ID_STD|CAN_RTR_REMOTE)&0xffff;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0xFFFF;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0xFFFF;
4、對(duì)標(biāo)準(zhǔn)數(shù)據(jù)幀過濾:(只接收標(biāo)準(zhǔn)數(shù)據(jù)幀)
CAN_FilterInitStructure.CAN_FilterIdHigh = (((u32)slave_id<<21)&0xffff0000)>>16;
CAN_FilterInitStructure.CAN_FilterIdLow = (((u32)slave_id<<21)|CAN_ID_STD|CAN_RTR_DATA)&0xffff;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0xFFFF;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0xFFFF;

5、對(duì)擴(kuò)展幀進(jìn)行過濾:(擴(kuò)展幀不會(huì)被過濾掉)
CAN_FilterInitStructure.CAN_FilterIdHigh = (((u32)slave_id<<3)&0xFFFF0000)>>16;
CAN_FilterInitStructure.CAN_FilterIdLow = (((u32)slave_id<<3)|CAN_ID_EXT)&0xFFFF;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0xFFFF;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0xFFFC;
6、對(duì)標(biāo)準(zhǔn)幀進(jìn)行過濾:(標(biāo)準(zhǔn)幀不會(huì)被過濾掉)
CAN_FilterInitStructure.CAN_FilterIdHigh = (((u32)slave_id<<21)&0xffff0000)>>16;
CAN_FilterInitStructure.CAN_FilterIdLow = (((u32)slave_id<<21)|CAN_ID_STD)&0xffff;
CAN_FilterInitStructure.CAN_FilterMaskIdHigh = 0xFFFF;
CAN_FilterInitStructure.CAN_FilterMaskIdLow = 0xFFFC;
注：slave_id為要過濾的id號(hào)。