这是51单片机端的代码通过can总线传输到arm上，但是他的ID我没看懂

b303714866 · 发表于 2015-11-23 22:52:48

//=================================================================================
//′®¿úμ½can    4800bps
//
//sbit SCK=P2^3;
//sbit SI=P2^2;
//sbit SO=P2^1;
//sbit CS=P2^0;
//INT ½óP3.3
//
//=================================================================================

#include "reg51.h"
#include "2515.h"
#include "SPI.h"
#include "Function.h"

#include "CAN0.h"
#define uchar unsigned char
#define uint unsigned int
void CAN_Send_anylength(unsigned char *CAN_TX_Buf,unsigned char length1);

unsigned char gRXFlag=0,sRXFlag=0,yRXFlag=0;
unsigned char data Com_RecBuff[8];
unsigned char bdata flag_init;

//*************************
#define INBUF_LEN 8 //êy¾Y3¤¶è

unsigned char inbuf1[INBUF_LEN];
unsigned char checksum,count3=0;

unsigned char a[8];
unsigned char b[8]={0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08};
sbit  P2_0  = P3^2;
unsigned char  U8FLAG,k;
unsigned char  U8count,U8temp;
unsigned char  U8T_data_H,U8T_data_L,U8RH_data_H,U8RH_data_L,U8checkdata;
unsigned char  U8T_data_H_temp,U8T_data_L_temp,U8RH_data_H_temp,U8RH_data_L_temp,U8checkdata_temp;
unsigned char  U8comdata;
unsigned char  shidu_shi,shidu_ge,wendu_shi,wendu_ge;
#define DataPort P1 //LCD1602êy¾Y¶Ë¿ú
sbit    LCM_RS=P3^5; //LCD1602Ãüáî¶Ë¿ú
sbit    LCM_RW=P3^6; //LCD1602Ãüáî¶Ë¿ú
sbit    LCM_EN=P3^7; //LCD1602Ãüáî¶Ë¿ú
/*******************************/

/*******************************/
void WaitForEnable(void)
{
DataPort=0xff;
LCM_RS=0;LCM_RW=1;_nop_();
LCM_EN=1;_nop_();_nop_();
while(DataPort&0x80);
LCM_EN=0;
}
/*******************************/
void WriteCommandLCM(uchar CMD,uchar Attribc)
{
if(Attribc)WaitForEnable();
LCM_RS=0;LCM_RW=0;_nop_();
DataPort=CMD;_nop_();
LCM_EN=1;_nop_();_nop_();LCM_EN=0;
}
/*******************************/
void WriteDataLCM(uchar dataW)
{
WaitForEnable();
LCM_RS=1;LCM_RW=0;_nop_();
DataPort=dataW;_nop_();
LCM_EN=1;_nop_();_nop_();LCM_EN=0;
}
/***********************************/
void InitLcd()
{
WriteCommandLCM(0x38,1);
WriteCommandLCM(0x08,1);
WriteCommandLCM(0x01,1);
WriteCommandLCM(0x06,1);
WriteCommandLCM(0x0c,1);
}
/***********************************/
void DisplayOneChar(uchar X,uchar Y,uchar DData)
{
Y&=1;
X&=15;
if(Y)X|=0x40;
X|=0x80;
WriteCommandLCM(X,0);
WriteDataLCM(DData);
}
void Delay(unsigned int j)
{
unsigned char i;
for(;j>0;j--)
{
for(i=0;i<27;i++);
}
}
void conversion(uint temp_data,uint temp1_data)
{

wendu_shi=temp_data/10+0x30 ;
temp_data=temp_data%10;    //è¡óàÔËËã
wendu_ge=temp_data+0x30;

shidu_shi=temp1_data/10+0x30 ;
temp1_data=temp1_data%10;    //è¡óàÔËËã
shidu_ge=temp1_data+0x30;
}
void  Delay_10us(void)
{
unsigned char i;
i--;
i--;
i--;
i--;
i--;
i--;
}
void  COM(void)
{
unsigned char i;
for(i=0;i<8;i++)
{
   U8FLAG=2;
   while((!P2_0)&&U8FLAG++);
Delay_10us();Delay_10us();Delay_10us();
U8temp=0;
   if(P2_0)U8temp=1;
      U8FLAG=2;
   while((P2_0)&&U8FLAG++);
//3¬ê±Ôòìø3öforÑ-»·
   if(U8FLAG==1)break;
//ÅD¶Ïêy¾YÎ»êÇ0»1êÇ1
// èç1û¸ßμçÆ½¸ß1yÔ¤¶¨0¸ßμçÆ½ÖμÔòêy¾YÎ»Îa 1
   U8comdata<<=1;
   U8comdata|=U8temp;       //0
   }//rof
}
void RH(void)
{
  //Ö÷»úà-μí18ms
P2_0=0;
Delay(180);
P2_0=1;
//×üÏßóééÏà-μç×èà-¸ß Ö÷»úÑóê±20us
Delay_10us();
Delay_10us();
Delay_10us();
Delay_10us();
//Ö÷»úéèÎaêäèë ÅD¶Ï′ó»úÏìó|DÅoÅ
P2_0=1;
//ÅD¶Ï′ó»úêÇ·ñóDμíμçÆ½Ïìó|DÅoÅ èç2»Ïìó|Ôòìø3ö￡¬Ïìó|ÔòÏòÏÂÔËDD
if(!P2_0)    //T !
{
   U8FLAG=2;
   //ÅD¶Ï′ó»úêÇ·ñ·￠3ö 80us μÄμíμçÆ½Ïìó|DÅoÅêÇ·ñ½áêø
   while((!P2_0)&&U8FLAG++);
   U8FLAG=2;
   //ÅD¶Ï′ó»úêÇ·ñ·￠3ö 80us μÄ¸ßμçÆ½￡¬èç·￠3öÔò½øèëêy¾Y½óêÕ×′ì¬
   while((P2_0)&&U8FLAG++);
   //êy¾Y½óêÕ×′ì¬
   COM();U8RH_data_H_temp=U8comdata;
   COM();U8RH_data_L_temp=U8comdata;
   COM();U8T_data_H_temp=U8comdata;
   COM();U8T_data_L_temp=U8comdata;
   COM();U8checkdata_temp=U8comdata;
   P2_0=1;
   //êy¾YD￡Ñé
   U8temp=(U8T_data_H_temp+U8T_data_L_temp+U8RH_data_H_temp+U8RH_data_L_temp);
   if(U8temp==U8checkdata_temp)
   {
      U8RH_data_H=U8RH_data_H_temp;
      U8RH_data_L=U8RH_data_L_temp;
   U8T_data_H=U8T_data_H_temp;
      U8T_data_L=U8T_data_L_temp;
      U8checkdata=U8checkdata_temp;
   }//fi

         conversion(U8T_data_H,U8RH_data_H);
         DisplayOneChar(5,0,wendu_shi);  //μú0DD￡¬μú5áD

         DisplayOneChar(6,0,wendu_ge);  //μú0DD￡¬μú6áD
   DisplayOneChar(7,0,0xdf);  //μú0DD￡¬μú7áD
   DisplayOneChar(8,0,'C');
         DisplayOneChar(5,1,shidu_shi);  //μú1DD￡¬μú9áD
         DisplayOneChar(6,1,shidu_ge);  //μú1DD￡¬μú10áD
         DisplayOneChar(7,1,'%');  //μú1DD￡¬μú11áD
}//fi
}

void init_serialcomm(void)
{
  SCON  = 0x50;    //SCON: serail mode 1, 8-bit UART, enable ucvr
  TMOD |= 0x20;    //TMOD: timer 1, mode 2, 8-bit reload
  PCON |= 0x80;    //SMOD=1;
  TH1 = 0xF4;    //Baud:4800  fosc=11.0592MHz
  TL1 = 0xF4;    //
  IE |= 0x90;    //Enable Serial Interrupt
  TR1 = 1;       // timer 1 run
}

void timer0initial()
{
  TMOD|=0x1;
  TH0=0xb8;TL0=0x00;
  IE|=0x90;    //Enable Serial Interrupt
  ET0=0;
  TR0=0;
}

//Ïò′®¿ú·￠Ëíò»¸ö×Ö·û
void send_char_com(unsigned char ch)
{
  SBUF=ch;
  while(!TI);
  TI=0;
}

void send_string_com(unsigned char *str,unsigned int strlen)
{
  unsigned int k=0;
  do
  {
send_char_com(*(str+k));
k++;
  }while(k<strlen);
}

void time_intt0(void) interrupt 1 using 2
{
  ET0=0;
  TR0=0;
  TH0=0xb8;
  TL0=0x00;
  sRXFlag=1;
}

//′®¿ú½óêÕÖD¶Ïoˉêy
void serial() interrupt 4 using 1
{
  unsigned char ch;

  if(RI)
  {
RI=0;
ET0=1;TR0=1;
ch=SBUF;

inbuf1[count3]=ch;
count3=count3+1;
if(count3==INBUF_LEN)
{
   ET0=0;
   TR0=0;
   TH0=0xb8;
   TL0=0x00;  //1Ø±Õ¶¨ê±ÖD¶Ï￡¬í￡Ö1¶¨ê±ÖD¶Ï
   sRXFlag=1;
}
  }
}

void ex1_int(void) interrupt 2 using 1
{
  gRXFlag=1;
}

void Init_Cpu(void)
{
  PX1=1;
  EX1=1;
  IT1=0;
  EA=1;
}
uchar num;
uchar code table2[]="temp:";
uchar code table3[]="Humi:";
void main()
{

  Init2515();
  init_serialcomm();    //3õê¼»ˉ′®¿ú
  timer0initial();    //¶¨ê±Æ÷03õê¼»ˉ
  Init_Cpu();
InitLcd();
for(num=0;num<5;num++)
{
DisplayOneChar(num,0,table2[num]); //ÏÔê¾×Ö·û′®"temp:"
Delay(20);
}
for(num=0;num<5;num++)
{
DisplayOneChar(num,1,table3[num]); //ÏÔê¾×Ö·û′®"Humi:"
Delay(20);
}
  while(1)
  {
   RH();
   inbuf1[0]=wendu_shi;
   inbuf1[1]=wendu_ge;
   inbuf1[2]=shidu_shi;
   inbuf1[3]=shidu_ge;
   sRXFlag=0;
   CAN_Send_anylength(inbuf1,4);
   Delay(20000);

if(sRXFlag)
{
   sRXFlag=0;
   CAN_Send_anylength(inbuf1,count3);
   count3=0;
}

if(gRXFlag)
{
   CAN_Receive_DLC(a);
   gRXFlag=0;
   send_string_com(a,DLC);
}
  }
}

b303714866 · 发表于 2015-11-23 22:53:26

#ifndef __CAN_H__
#define __CAN_H__

#include "2515.h"
#include "SPI.h"
#include "reg51.h"
#include "Function.h"

#define CAN_10Kbps 0x31
#define CAN_25Kbps 0x13
#define CAN_50Kbps 0x09
#define CAN_100Kbps 0x04
#define CAN_125Kbps 0x03
#define CAN_250Kbps 0x01
#define CAN_500Kbps 0x00

unsigned char DLC,dummy;

void Init2515(void)
{
  SPIReset();
  delay1ms(1);

  //SPIByteWrite(CANCTRL,0x80);//CAN1¤×÷ÔúÅäÖÃÄ￡ê½

  SPIByteWrite(RXM0SIDH,0x00);
  SPIByteWrite(RXM0SIDL,0x00);

  SPIByteWrite(RXF0SIDH,0x00);
  SPIByteWrite(RXF0SIDL,0x00);
  //éèÖÃ2¨ìØÂêÎa10Kbps
  //set CNF1,SJW=00,3¤¶èÎa1TQ,BRP=49,TQ=[2*(BRP+1)]/Fsoc=2*50/8M=12.5us
  SPIByteWrite(CNF1,CAN_125Kbps);
  //set CNF2,SAM=0,Ôú2éÑùμã¶Ô×üÏß½øDDò»′Î2éÑù￡&#172

HSEG1=(2+1)TQ=3TQ,PRSEG=(0+1)TQ=1TQ
  SPIByteWrite(CNF2,0x80|PHSEG1_3TQ|PRSEG_1TQ);
  //set CNF3,PHSEG2=(2+1)TQ=3TQ,í¬ê±μ±CANCTRL.CLKEN=1ê±éè¶¨CLKOUTòy½ÅÎaê±¼äêä3öê1ÄüÎ»
  SPIByteWrite(CNF3,PHSEG2_3TQ);

  //set TXB0￡¬éèÖÃ·￠Ëí»o3åÆ÷0μÄ±êê¶·ûoí·￠ËíμÄêy¾Y￡¬òÔ¼°·￠ËíμÄêy¾Y3¤¶è
  SPIByteWrite(TXB0SIDH,0xFF);//éèÖÃ·￠Ëí»o3åÆ÷0μÄ±ê×¼±êê¶·û￡¬′yDT¸Ä***
  SPIByteWrite(TXB0SIDL,0xE0);//óÃμ½±ê×¼±êê¶·û

  //SPIByteWrite(TXB0D0,0x1E);//óD′yDT¸Ä¼°è·¶¨êÇ·ñê1óÃ
  //SPIByteWrite(TXB0D1,0x10)￡»//óD′yDT¸Ä¼°è·¶¨êÇ·ñê1óÃ

  /*set TXB1
  SPIByteWrite(TXB1SIDH,0x50); //Set TXB0 SIDH
  SPIByteWrite(TXB1SIDL,0x00); //Set TXB0 SIDL
  SPIByteWrite(TXB1DLC,0x40 | DLC_8); //Set DLC = 3 bytes and RTR bit*/

  //éèÖÃ½óêÕ»o3åÆ÷0μÄ±êê¶·ûoí3õê¼»ˉêy¾Y
  SPIByteWrite(RXB0SIDH,0x00);//éèÖÃ½óêÕ»o3åÆ÷0μÄ±ê×¼±êê¶·û￡¬′yDT¸Ä***
  SPIByteWrite(RXB0SIDL,0x60);//óÃμ½±ê×¼±êê¶·û
  SPIByteWrite(RXB0CTRL,0x60);//½ö½ö½óêÕ±ê×¼±êê¶·ûμÄóDD§DÅÏ￠￡¬FIILHIT0=0±íê¾RXB0 ￡¬2éóÃFILHIT0
  SPIByteWrite(RXB0DLC,DLC_8);//éèÖÃ½óêÕêy¾YμÄ3¤¶èÎa8¸ö×Ö½ú

  SPIByteWrite(RXF0SIDH,0xFF);//3õê¼»ˉ½óêÕÂË2¨Æ÷0￡¬′yDT¸Ä***
  SPIByteWrite(RXF0SIDL,0xE0);
  SPIByteWrite(RXM0SIDH,0xFF);//3õê¼»ˉ½óêÕÆá±ÎÆ÷0￡¬′yDT¸Ä***
  SPIByteWrite(RXM0SIDL,0xE0);

  //éèÖÃ½óêÕ»o3åÆ÷0ÖD¶Ï
  SPIByteWrite(CANINTF,0x00);//Çå¿ÕÖD¶Ï±êÖ¾Î»
  SPIByteWrite(CANINTE,0x01);//½óêÕ»o3åÆ÷0ÂúÖD¶Ïê1ÄüÎ»

  SPIByteWrite(CANCTRL,REQOP_NORMAL|CLKOUT_ENABLED);//éèÖÃÕy3￡Ä￡ê½

  dummy=SPIByteRead(CANSTAT);
  if(OPMODE_NORMAL!=(dummy&&0xE0))
  {
SPIByteWrite(CANCTRL,REQOP_NORMAL|CLKOUT_ENABLED);//ÅD¶Ï½øèëÕy3￡1¤×÷Ä￡ê½
  }

}

//CAN·￠ËíèÎòa3¤¶è×Ö½ú
void CAN_Send_anylength(unsigned char *CAN_TX_Buf,unsigned char length1)
{
  unsigned char tempdata,j;
  tempdata=SPIByteRead(CAN_RD_STATUS);
  SPIByteWrite(TXB0DLC,length1);
  for(j=0;j<length1;j++)
  {
SPIByteWrite(TXB0D0+j,CAN_TX_Buf[j]);
  }

  if(tempdata&0x04)//ÅD¶ÏTXREQ±êÖ¾Î»
  {
delay1ms(1);
SPIByteWrite(TXB0CTRL,0);//Çå3yTXREQ±êÖ¾Î»
while(SPIByteRead(CAN_RD_STATUS)&0x04);//μè′yTXREQÇåáã
  }
  CS=0;
  WriteSPI(CAN_RTS_TXB0);//·￠Ëí»o3åÆ÷0ÇëÇó·￠Ëí
  CS=1;
}

//CAN½óêÕèÎòa3¤¶èμÄêy¾Y
void CAN_Receive_DLC(unsigned char *CAN_RX_Buf)
{
  unsigned char i;
  DLC=SPIByteRead(RXB0DLC);
  for(i=0;i<DLC;i++)
  {
//°Ñ½óêÕ»o3åÇøàïμÄêy¾Y￡¬·Åμ½Äú2¿RAM»o3åÇø
CAN_RX_Buf[i]=SPIByteRead(RXB0D0+i);
  }

  SPIByteWrite(CANINTF,0);
}

#endif

flyleaf · 发表于 2015-11-24 09:06:54

没看懂

dzxmt · 发表于 2015-11-24 12:24:50

kankan aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

b303714866 · 发表于 2015-11-24 15:12:59

dzxmt 发表于 2015-11-24 12:24
kankan aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

#ifndef __CAN_H__
#define __CAN_H__
// write your header here
#include "2515.h"
#include "SPI.h"
#include "reg51.h"
#include "Function.h"

#define CAN_10Kbps 0x31
#define CAN_25Kbps 0x13
#define CAN_50Kbps 0x09
#define CAN_100Kbps 0x04
#define CAN_125Kbps 0x03
#define CAN_250Kbps 0x01
#define CAN_500Kbps 0x00

//void SPIReset(void);
//void SPIByteWrite(unsigned char ,unsigned char );
//unsigned char SPIByteRead(unsigned char );
unsigned char dummy;

void Init2515(unsigned int IDF)
{
SPIReset();
delay_ms(1);

//SPIByteWrite(CANCTRL,0x80);//CAN1¤×÷ÔúÅäÖÃÄ￡ê½

SPIByteWrite(RXM0SIDH,0x00);
SPIByteWrite(RXM0SIDL,0x00);
SPIByteWrite(RXF0SIDH,0x00);
SPIByteWrite(RXF0SIDL,0x00);

SPIByteWrite(RXM1SIDH,0x00);
SPIByteWrite(RXM1SIDL,0x00);
SPIByteWrite(RXF2SIDH,0x00);
SPIByteWrite(RXF2SIDL,0x00);

//éèÖÃ2¨ìØÂêÎa10Kbps
//set CNF1,SJW=00,3¤¶èÎa1TQ,BRP=49,TQ=[2*(BRP+1)]/Fsoc=2*50/8M=12.5us
SPIByteWrite(CNF1,CAN_125Kbps);
//set CNF2,SAM=0,Ôú2éÑùμã¶Ô×üÏß½øDDò»′Î2éÑù￡&#172

HSEG1=(2+1)TQ=3TQ,PRSEG=(0+1)TQ=1TQ
SPIByteWrite(CNF2,0x80|PHSEG1_3TQ|PRSEG_1TQ);
//set CNF3,PHSEG2=(2+1)TQ=3TQ,í¬ê±μ±CANCTRL.CLKEN=1ê±éè¶¨CLKOUTòy½ÅÎaê±¼äêä3öê1ÄüÎ»
SPIByteWrite(CNF3,PHSEG2_3TQ);

//set TXB0￡¬éèÖÃ·￠Ëí»o3åÆ÷0μÄ±êê¶·ûoí·￠ËíμÄêy¾Y￡¬òÔ¼°·￠ËíμÄêy¾Y3¤¶è
   SPIByteWrite(TXB0CTRL,0x03);//éèÖÃ·￠Ëí»o3åÆ÷0¿ØÖÆ¼Ä′æÆ÷ÇåáãTXREQ,·￠ËíóÅÏè¼¶×î¸ß
//BitModiMcp2515(TXB0CTRL,0x08,0x00);

SPIByteWrite(TXB0SIDH,IDF);//éèÖÃ·￠Ëí»o3åÆ÷0μÄ±ê×¼±êê¶·û￡¬′yDT¸Ä***
SPIByteWrite(TXB0SIDL,0xE0);//óÃμ½±ê×¼±êê¶·û
SPIByteWrite(TXB0DLC,DLC_8);//éèÖÃ·￠Ëíêy¾YμÄ3¤¶èÎa8¸ö×Ö½ú
//SPIByteWrite(TXB0D0,0x1E);//óD′yDT¸Ä¼°è·¶¨êÇ·ñê1óÃ
//SPIByteWrite(TXB0D1,0x10)￡»//óD′yDT¸Ä¼°è·¶¨êÇ·ñê1óÃ

/*set TXB1
SPIByteWrite(TXB1SIDH,0x50); //Set TXB0 SIDH
SPIByteWrite(TXB1SIDL,0x00); //Set TXB0 SIDL
SPIByteWrite(TXB1DLC,0x40 | DLC_8); //Set DLC = 3 bytes and RTR bit*/

//éèÖÃ½óêÕ»o3åÆ÷0μÄ±êê¶·ûoí3õê¼»ˉêy¾Y
//SPIByteWrite(RXB0SIDH,0x55);//éèÖÃ½óêÕ»o3åÆ÷0μÄ±ê×¼±êê¶·û￡¬′yDT¸Ä***
//SPIByteWrite(RXB0SIDL,0xE0);//óÃμ½±ê×¼±êê¶·û
SPIByteWrite(RXB0CTRL,0x20);//½ö½ö½óêÕ±ê×¼±êê¶·ûμÄóDD§DÅÏ￠￡¬FIILHIT0=0±íê¾RXB0 ￡¬2éóÃFILHIT0
SPIByteWrite(RXB0DLC,DLC_8);//éèÖÃ½óêÕêy¾YμÄ3¤¶èÎa8¸ö×Ö½ú

SPIByteWrite(RXF0SIDH,0xE0);//3õê¼»ˉ½óêÕÂË2¨Æ÷0￡¬′yDT¸Ä***
SPIByteWrite(RXF0SIDL,0xE0);
SPIByteWrite(RXM0SIDH,0xFF);//3õê¼»ˉ½óêÕÆá±ÎÆ÷0￡¬′yDT¸Ä***
SPIByteWrite(RXM0SIDL,0xE0);

//éèÖÃ½óêÕ»o3åÆ÷1μÄ±êê¶·ûoí3õê¼»ˉêy¾Y
   //SPIByteWrite(RXB1SIDH,IDF); //éèÖÃ½óêÕ»o3åÆ÷0μÄ±ê×¼±êê¶·û￡¬′yDT¸Ä***
   //SPIByteWrite(RXB1SIDL,0xE0);//óÃμ½±ê×¼±êê¶·û
   SPIByteWrite(RXB1CTRL,0x20);//½ö½ö½óêÕ±ê×¼±êê¶·ûμÄóDD§DÅÏ￠￡¬FIILHIT0=0±íê¾RXB0 ￡¬2éóÃFILHIT0
   SPIByteWrite(RXB1DLC,DLC_8);//éèÖÃ½óêÕêy¾YμÄ3¤¶èÎa8¸ö×Ö½ú

   SPIByteWrite(RXF2SIDH,0x00);//3õê¼»ˉ½óêÕÂË2¨Æ÷2￡¬′yDT¸Ä***
   SPIByteWrite(RXF2SIDL,0xE0);

   SPIByteWrite(RXF3SIDH,0x01);//3õê¼»ˉ½óêÕÂË2¨Æ÷3￡¬′yDT¸Ä***
   SPIByteWrite(RXF3SIDL,0xE0);

   SPIByteWrite(RXF4SIDH,0x02);//3õê¼»ˉ½óêÕÂË2¨Æ÷4￡¬′yDT¸Ä***
   SPIByteWrite(RXF4SIDL,0xE0);

   SPIByteWrite(RXF5SIDH,0x56);//3õê¼»ˉ½óêÕÂË2¨Æ÷5￡¬′yDT¸Ä***
   SPIByteWrite(RXF5SIDL,0xE0);

   SPIByteWrite(RXM1SIDH,0xFF);//3õê¼»ˉ½óêÕÆá±ÎÆ÷1￡¬′yDT¸Ä***
   SPIByteWrite(RXM1SIDL,0xE0);

//éèÖÃ½óêÕ»o3åÆ÷0ÖD¶Ï
SPIByteWrite(CANINTF,0x00);//½óêÕíêò»′Î±ØDë¶ÔÖD¶Ï±êÖ¾Î»Çå0
SPIByteWrite(CANINTE,0x02);//½óêÕ»o3åÆ÷0ÂúÖD¶Ïê1ÄüÎ»***DT¸Ä3é01-02
//éèÖÃμ￥′￥·￠Ä￡ê½1 ê1Äü￡¬±¨ÎÄ3￠êÔ·￠Ëíò»′Î￡»0½ûÖ1¡￡èçóDDèòa±¨ÎÄ»áÖØ·￠
//BitModiMcp2515(CANCTRL,0x08,0x00);
SPIByteWrite(CANCTRL,REQOP_NORMAL | CLKOUT_ENABLED);//éèÖÃÕy3￡Ä￡ê½
BitModiMcp2515(CANCTRL,0xE7,0x04);
    dummy=SPIByteRead(CANSTAT);
if (OPMODE_NORMAL != (dummy && 0xE0))
   SPIByteWrite(CANCTRL,REQOP_NORMAL | CLKOUT_ENABLED);//ÅD¶Ï½øèëÕy3￡1¤×÷Ä￡ê½
   //SPIByteWrite(CANCTRL,0x00);//Ñ¡¶¨Õy3￡1¤×÷Ä￡ê½

}

//CAN·￠Ëí3ìDò
void CAN_Send(unsigned char *CAN_TX_Buf)
{
unsigned char tempdata;
tempdata=SPIByteRead(CAN_RD_STATUS);
if(tempdata&0x04)          //ÅD¶ÏTXREQ±êÖ¾Î»
{
delay_ms(1);
   //SPIByteWrite(TXB0CTRL,0);//Çå3yTXREQ±êÖ¾Î»
      BitModiMcp2515(TXB0CTRL,0x08,0x00);
while(SPIByteRead(CAN_RD_STATUS)&0x04);//μè′yTXREQÇåáã
      }
SPIByteWrite(TXB0D0,CAN_TX_Buf[0]);
SPIByteWrite(TXB0D1,CAN_TX_Buf[1]);
SPIByteWrite(TXB0D2,CAN_TX_Buf[2]);
SPIByteWrite(TXB0D3,CAN_TX_Buf[3]);
SPIByteWrite(TXB0D4,CAN_TX_Buf[4]);
SPIByteWrite(TXB0D5,CAN_TX_Buf[5]);
SPIByteWrite(TXB0D6,CAN_TX_Buf[6]);
SPIByteWrite(TXB0D7,CAN_TX_Buf[7]);
/* if(tempdata&0x04)          //ÅD¶ÏTXREQ±êÖ¾Î»
{
delay_ms(2);
   //SPIByteWrite(TXB0CTRL,0);//Çå3yTXREQ±êÖ¾Î»
      BitModiMcp2515(TXB0CTRL,0x08,0x00);
while(SPIByteRead(CAN_RD_STATUS)&0x04);//μè′yTXREQÇåáã
}*/
CS=LOW;
//WriteSPI(CAN_RTS_TXB0);//·￠Ëí»o3åÆ÷0ÇëÇó·￠Ëí
BitModiMcp2515(TXB0CTRL,0x08,0xFF);
CS=HIGH;
}

//CAN½óêÕ3ìDò
/*void CAN_Receive(unsigned char *CAN_RX_Buf)
{
CAN_RX_Buf[0]=SPIByteRead(RXB0D0);
CAN_RX_Buf[1]=SPIByteRead(RXB0D1);
CAN_RX_Buf[2]=SPIByteRead(RXB0D2);
CAN_RX_Buf[3]=SPIByteRead(RXB0D3);
CAN_RX_Buf[4]=SPIByteRead(RXB0D4);
CAN_RX_Buf[5]=SPIByteRead(RXB0D5);
CAN_RX_Buf[6]=SPIByteRead(RXB0D6);
CAN_RX_Buf[7]=SPIByteRead(RXB0D7);
SPIByteWrite(CANINTF,0x00);//Çå¿Õ½óêÕÖD¶Ï±êÖ¾Î»
//′ò¿a½óêÕ»o3åÆ÷½óêÕDÂDÅÏ￠￡¬¸Ã¾äèçoÎD′
}*/
void CAN_Receive(unsigned char *CAN_RX_Buf)
{
BitModiMcp2515(CANINTF,0x02,0x00);//Çå¿Õ½óêÕÖD¶Ï±êÖ¾Î»RX1IF

CAN_RX_Buf[0]=SPIByteRead(RXB1D0);
CAN_RX_Buf[1]=SPIByteRead(RXB1D1);
CAN_RX_Buf[2]=SPIByteRead(RXB1D2);
CAN_RX_Buf[3]=SPIByteRead(RXB1D3);
CAN_RX_Buf[4]=SPIByteRead(RXB1D4);
CAN_RX_Buf[5]=SPIByteRead(RXB1D5);
CAN_RX_Buf[6]=SPIByteRead(RXB1D6);
CAN_RX_Buf[7]=SPIByteRead(RXB1D7);
//SPIByteWrite(CANINTF,0x00);    //Çå¿Õ½óêÕÖD¶Ï±êÖ¾Î»
//BitModiMcp2515(CANINTF,0x02,0x00);//Çå¿Õ½óêÕÖD¶Ï±êÖ¾Î»RX1IF
                                    //′ò¿a½óêÕ»o3åÆ÷½óêÕDÂDÅÏ￠￡¬¸Ã¾äèçoÎD′
}
#endif是不是在这个里

b303714866 · 发表于 2015-11-24 15:15:47

dzxmt 发表于 2015-11-24 12:24
kankan aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

#ifndef __CAN_H__
#define __CAN_H__
// write your header here
#include "2515.h"
#include "SPI.h"
#include "reg51.h"
#include "Function.h"

#define CAN_10Kbps 0x31
#define CAN_25Kbps 0x13
#define CAN_50Kbps 0x09
#define CAN_100Kbps 0x04
#define CAN_125Kbps 0x03
#define CAN_250Kbps 0x01
#define CAN_500Kbps 0x00

//void SPIReset(void);
//void SPIByteWrite(unsigned char ,unsigned char );
//unsigned char SPIByteRead(unsigned char );
unsigned char dummy;

void Init2515(unsigned int IDF)
{
SPIReset();
delay_ms(1);

//SPIByteWrite(CANCTRL,0x80);//CAN1¤×÷ÔúÅäÖÃÄ￡ê½

SPIByteWrite(RXM0SIDH,0x00);
SPIByteWrite(RXM0SIDL,0x00);
SPIByteWrite(RXF0SIDH,0x00);
SPIByteWrite(RXF0SIDL,0x00);

SPIByteWrite(RXM1SIDH,0x00);
SPIByteWrite(RXM1SIDL,0x00);
SPIByteWrite(RXF2SIDH,0x00);
SPIByteWrite(RXF2SIDL,0x00);

//éèÖÃ2¨ìØÂêÎa10Kbps
//set CNF1,SJW=00,3¤¶èÎa1TQ,BRP=49,TQ=[2*(BRP+1)]/Fsoc=2*50/8M=12.5us
SPIByteWrite(CNF1,CAN_125Kbps);
//set CNF2,SAM=0,Ôú2éÑùμã¶Ô×üÏß½øDDò»′Î2éÑù￡&#172

HSEG1=(2+1)TQ=3TQ,PRSEG=(0+1)TQ=1TQ
SPIByteWrite(CNF2,0x80|PHSEG1_3TQ|PRSEG_1TQ);
//set CNF3,PHSEG2=(2+1)TQ=3TQ,
SPIByteWrite(CNF3,PHSEG2_3TQ);

//set TXB0￡¬éèÖÃ·￠Ëí»o3åÆ÷0μÄ±êê¶·ûoí·￠ËíμÄêy¾Y￡¬òÔ¼°·￠ËíμÄêy¾Y3¤¶è
   SPIByteWrite(TXB0CTRL,0x03);//éèÖÃ·￠Ëí»o3åÆ÷0¿ØÖÆ¼Ä′æÆ÷ÇåáãTXREQ,·￠ËíóÅÏè¼¶×î¸ß
//BitModiMcp2515(TXB0CTRL,0x08,0x00);

SPIByteWrite(TXB0SIDH,IDF);
SPIByteWrite(TXB0SIDL,0xE0);
SPIByteWrite(TXB0DLC,DLC_8);
//SPIByteWrite(TXB0D0,0x1E);
//SPIByteWrite(TXB0D1,0x10)

/*set TXB1
SPIByteWrite(TXB1SIDH,0x50); //Set TXB0 SIDH
SPIByteWrite(TXB1SIDL,0x00); //Set TXB0 SIDL
SPIByteWrite(TXB1DLC,0x40 | DLC_8); //Set DLC = 3 bytes and RTR bit*/

//SPIByteWrite(RXB0SIDH,0x55);/
//SPIByteWrite(RXB0SIDL,0xE0);
SPIByteWrite(RXB0CTRL,0x20);
SPIByteWrite(RXB0DLC,DLC_8);

SPIByteWrite(RXF0SIDH,0xE0);
SPIByteWrite(RXF0SIDL,0xE0);
SPIByteWrite(RXM0SIDH,0xFF);
SPIByteWrite(RXM0SIDL,0xE0);

   //SPIByteWrite(RXB1SIDH,IDF);
   //SPIByteWrite(RXB1SIDL,0xE0);
   SPIByteWrite(RXB1CTRL,0x20);
   SPIByteWrite(RXB1DLC,DLC_8)

   SPIByteWrite(RXF2SIDH,0x00)
   SPIByteWrite(RXF2SIDL,0xE0);

   SPIByteWrite(RXF3SIDH,0x01);//3õê¼»ˉ½óêÕÂË2¨Æ÷3￡¬′yDT¸Ä***
   SPIByteWrite(RXF3SIDL,0xE0);

   SPIByteWrite(RXF4SIDH,0x02);/
   SPIByteWrite(RXF4SIDL,0xE0);

   SPIByteWrite(RXF5SIDH,0x56);
   SPIByteWrite(RXF5SIDL,0xE0);

   SPIByteWrite(RXM1SIDH,0xFF);
   SPIByteWrite(RXM1SIDL,0xE0);

//éèÖÃ½óêÕ»o3åÆ÷0ÖD¶Ï
SPIByteWrite(CANINTF,0x00);
SPIByteWrite(CANINTE,0x02);
//BitModiMcp2515(CANCTRL,0x08,0x00);
SPIByteWrite(CANCTRL,REQOP_NORMAL | CLKOUT_ENABLED);//éèÖÃÕy3￡Ä￡ê½
BitModiMcp2515(CANCTRL,0xE7,0x04);
    dummy=SPIByteRead(CANSTAT);
if (OPMODE_NORMAL != (dummy && 0xE0))
   SPIByteWrite(CANCTRL,REQOP_NORMAL | CLKOUT_ENABLED);
   //SPIByteWrite(CANCTRL,0x00);
}

//CAN·￠Ëí3ìDò
void CAN_Send(unsigned char *CAN_TX_Buf)
{
unsigned char tempdata;
tempdata=SPIByteRead(CAN_RD_STATUS);
if(tempdata&0x04)
{
delay_ms(1);
   //SPIByteWrite(TXB0CTRL,0);
      BitModiMcp2515(TXB0CTRL,0x08,0x00);
while(SPIByteRead(CAN_RD_STATUS)&0x04);
      }
SPIByteWrite(TXB0D0,CAN_TX_Buf[0]);
SPIByteWrite(TXB0D1,CAN_TX_Buf[1]);
SPIByteWrite(TXB0D2,CAN_TX_Buf[2]);
SPIByteWrite(TXB0D3,CAN_TX_Buf[3]);
SPIByteWrite(TXB0D4,CAN_TX_Buf[4]);
SPIByteWrite(TXB0D5,CAN_TX_Buf[5]);
SPIByteWrite(TXB0D6,CAN_TX_Buf[6]);
SPIByteWrite(TXB0D7,CAN_TX_Buf[7]);
/* if(tempdata&0x04)
delay_ms(2);
   //SPIByteWrite(TXB0CTRL,0);
      BitModiMcp2515(TXB0CTRL,0x08,0x00);
while(SPIByteRead(CAN_RD_STATUS)&0x04);
}*/
CS=LOW;
//WriteSPI(CAN_RTS_TXB0);
BitModiMcp2515(TXB0CTRL,0x08,0xFF);
CS=HIGH;
}

/*void CAN_Receive(unsigned char *CAN_RX_Buf)
{
CAN_RX_Buf[0]=SPIByteRead(RXB0D0);
CAN_RX_Buf[1]=SPIByteRead(RXB0D1);
CAN_RX_Buf[2]=SPIByteRead(RXB0D2);
CAN_RX_Buf[3]=SPIByteRead(RXB0D3);
CAN_RX_Buf[4]=SPIByteRead(RXB0D4);
CAN_RX_Buf[5]=SPIByteRead(RXB0D5);
CAN_RX_Buf[6]=SPIByteRead(RXB0D6);
CAN_RX_Buf[7]=SPIByteRead(RXB0D7);
SPIByteWrite(CANINTF,0x00);

}*/
void CAN_Receive(unsigned char *CAN_RX_Buf)
{
BitModiMcp2515(CANINTF,0x02,0x00);

CAN_RX_Buf[0]=SPIByteRead(RXB1D0);
CAN_RX_Buf[1]=SPIByteRead(RXB1D1);
CAN_RX_Buf[2]=SPIByteRead(RXB1D2);
CAN_RX_Buf[3]=SPIByteRead(RXB1D3);
CAN_RX_Buf[4]=SPIByteRead(RXB1D4);
CAN_RX_Buf[5]=SPIByteRead(RXB1D5);
CAN_RX_Buf[6]=SPIByteRead(RXB1D6);
CAN_RX_Buf[7]=SPIByteRead(RXB1D7);
//SPIByteWrite(CANINTF,0x00);
//BitModiMcp2515(CANINTF,0x02,0x00);

}
#endif是不是在这个里

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这是51单片机端的代码通过can总线传输到arm上，但是他的ID我没看懂

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