www.pudn.com > 12can.rar > can.h

//////can.h////////////////// 
#include "C8051F040.h"	 
#include "canreg.h" 
typedef unsigned char uchar; 
typedef unsigned int uint; 
typedef unsigned long ulong; 
union intchar{ 
	uint tempval; 
	struct {uchar hi;uchar low;}bytek; 
}; 
bit isnewdata; 
data uchar temppage; 
data uchar status; 
xdata uchar sdata[8]={0x32,0x33,0x34,0x35,0xb2,0xb3,0xb4,0xb5};//发送缓冲区 
xdata union intchar rdata[4]; 
void init_msg_object_TX (uchar MsgNum,uchar id); 
void init_msg_object_RX (uchar MsgNum,uchar id); 
void clear_msg_objects (void); 
void start_CAN (void); 
void init_msg_object_TX (char MsgNum,uint id)  
{ 
	uint temp; 
  	SFRPAGE = CAN0_PAGE; 
	CAN0ADR = IF1CMDMSK; //指向IF1 Command Mask Registers 
	CAN0DAT = 0x00b3;  
	/*   IF1 Command Mask Registers  =0x00b3  
	WR/RD=1,Mask=0,Arb=1,Control=1,ClrIntPnd=0,TxRqst=0,DataA=1,DataB=1,一次发送8字节数据*/ 
	CAN0ADR = IF1ARB1;             
	CAN0DAT = 0x0000;   
	/*IF1 Arbitration Registers1 =0x0000，即ID15-0=0*/ 
	temp=id<<2;//标准id为ID28-ID18,所以要左移2位 
	temp&=0x1fff; 
	temp|=0xa000; 
	CAN0DAT = temp; //地址自增，指向IF1 Arbitration Registers2 
	/*IF1 Arbitration Registers2=101(id)00b 
	MsgVal=1,Xtd=0,为标准模式，扩展ID无效，Dir=1，为发送*/ 
	CAN0DAT = 0x0088; 
	/*IF1 Message Control Registers=0x0088 
	NewDat=0,MsgLst=0,IntPnd=0,UMask=0,TxIE=0,RxIE=0,RmtEn=0,TxRqst=0 
	EoB=1,DLC3-0=1000,即数据长度为8*/ 
	CAN0ADR = IF1CMDRQST;          
	CAN0DAT = MsgNum;    
	/*IF1 Command Request Registers=MsgNum,将以上配置写入MsgNum号消息*/ 
} 
void init_msg_object_RX (char MsgNum,uchar id)  
{ 
	uint temp; 
   	SFRPAGE = CAN0_PAGE; 
	CAN0ADR = IF2CMDMSK;  
	CAN0DAT = 0x00bb;              
	/*   IF2 Command Mask Registers  =0x00bb  
	WR/RD=1,Mask=0,Arb=1,Control=1,ClrIntPnd=1,TxRqst=0,DataA=1,DataB=1,一次发送8字节数据*/ 
	CAN0ADR = IF2ARB1;            
	CAN0DAT = 0x0000;  
	/*IF2 Arbitration Registers1 =0x0000，即ID15-0=0*/             
	temp=id<<2;//标准id为ID28-ID18,所以要左移2位 
	temp&=0x1fff; 
	temp|=0x8000; 
	CAN0DAT = temp;  
	/*IF2 Arbitration Registers2=100(id)00b 
	MsgVal=1,Xtd=0,为标准模式，扩展ID无效，Dir=0，为接收*/ 
	CAN0DAT = 0x0488; 
	/*IF2 Message Control Registers=0x0488 
	NewDat=0,MsgLst=0,IntPnd=0,UMask=0,TxIE=0,RxIE=1,接收中断使能;RmtEn=0,TxRqst=0 
	EoB=1,DLC3-0=1000,即数据长度为8*/ 
	CAN0ADR = IF2CMDRQST;         
	CAN0DATL = MsgNum;            
  	/*IF2 Command Request Registers=MsgNum,将以上配置写入MsgNum号消息*/ 
} 
void clear_msg_objects (void) //将所有消息清零 
{	 
	uchar i; 
   	SFRPAGE = CAN0_PAGE; 
	CAN0ADR = IF1CMDMSK;        
	CAN0DATL = 0xFF;             
	for (i=1;i<33;i++) 
      { 
		CAN0ADR = IF1CMDRQST;      
		CAN0DATL = i; 
      }    
} 
void start_CAN (void)  
{ 
   	SFRPAGE = CAN0_PAGE; 
	CAN0CN= 0x02;	 
	/*IE置1，使能CAN模块中断，Init清零，结束初始化操作，CAN控制器进入正常工作*/ 
	 
}