Domestic GD chip can filter

GD Chip replacement ST Chip time ,ST Of CAN Filter program not available

Here is CANopen Commonly used CANID Filter

Running environment ：

#include “gd32f10x.h”
#include <stdio.h>
#include “gd32f10x_can.h”
#include “gd32f10x_gpio.h”

/*------------------------------------------- // Function name ：CAN_Set_Filter // describe ： CAN0 filter , The default configuration complies with CANopen Basic instructions   Filtering rules 1 CAN ID The lower seven digits of must be the same as Addr Agreement , Others don't care   Filtering rules 2 CAN ID Of the 7 Bit must be 1, That is, only 0x80 Can pass   Filtering rules 3 CAN ID The lower eight digits of must be 0x00 // Parameters ：uint8_t Addr CANopen Of this machine nodeID // Return value ： nothing  // Function call list ： ---------------------------------------------*/
void CAN_Set_Filter(uint8_t Addr)
{
    
	CAN_FCTL(CAN0)|=1<<0;		// The filter group works in initialization mode 
/* Filtering rules 1 CAN ID The lower seven digits of must be the same as Addr Agreement , Others don't care  */
	CAN_FW(CAN0)&=~(1<<0);	// filter 0 Do not activate 
	CAN_FSCFG(CAN0)|=1<<0; 		// The filter bit width is 32 position .
	CAN_FMCFG(CAN0)&=~(1<<0);		// filter 0 Working in identifier mask bit mode 
	CAN_FAFIFO(CAN0)&=~(1<<0);		// filter 0 Related to FIFO0
	CAN_F0DATA0(CAN0)=Addr<<21;//32 position ID
	CAN_F0DATA1(CAN0)=(0x7F<<21);//32 position MASK
	CAN_FW(CAN0)|=1<<0;		// Activate the filter 0
/* Filtering rules 2 CAN ID Of the 7 Bit must be 1, That is, only 0x80 Can pass */	
	CAN_FW(CAN0)&=~(1<<1);	// filter 1 Do not activate 
	CAN_FSCFG(CAN0)|=1<<1; 		// filter 1 The seat width is 32 position .
	CAN_FMCFG(CAN0)|=(1<<1);	// filter 1 Working in identifier list mode 
	CAN_FAFIFO(CAN0)&=~(1<<1);		// filter 1 Related to FIFO0
	CAN_F1DATA0(CAN0)=0x80<<21;//32 position ID
	CAN_F1DATA1(CAN0)=(0x80<<21);//32 position MASK
	CAN_FW(CAN0)|=1<<1;		// Activate the filter 1
/* Filtering rules 3 CAN ID The lower eight digits of must be 0x00*/
	CAN_FW(CAN0)&=~(1<<2);	// filter 2 Do not activate 
	CAN_FSCFG(CAN0)|=1<<2; 		// filter 2 The seat width is 32 position .
	CAN_FMCFG(CAN0)&=~(1<<2);		// filter 2 Working in identifier mask bit mode 
	//CAN1->FM1R|=1<<2; // filter 2 Working in identifier list mode 
	CAN_FAFIFO(CAN0)&=~(1<<2);		// filter 2 Related to FIFO0
	CAN_F2DATA0(CAN0)=0x00<<21;//32 position ID
	CAN_F2DATA1(CAN0)=(0xFF<<21);//32 position MASK
	CAN_FW(CAN0)|=1<<2;		// Activate the filter 2
	CAN_FCTL(CAN0)&=~(1<<0);		// The filter bank enters normal mode 
}