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问 大家帮忙看看我的 CAN总线代码正确吗？能收能发，硬件：C51+SJA1000+TJA1040
#include "absacc.h"
#include "stdio.h"
#include "string.h"
#include "intrins.h"
//#include "AT89X51.H"
#include "reg52.h"

//定义SJA1000的基址

#define SJA_BaseAdr 0X7F00

// 控制寄存器

#define REG_MODE SJA_BaseAdr+0x00 //内部控制寄存器
#define REG_COMMAND SJA_BaseAdr+0x01 //命令寄存器
#define REG_STATUS SJA_BaseAdr+0x02 //状态寄存器
#define REG_INTERRUPT SJA_BaseAdr+0x03 //中断寄存器
#define REG_INTENABLE SJA_BaseAdr+0x04 //中断使能寄存器
#define REG_BTR0 SJA_BaseAdr+0x06 //总线定时寄存器0
#define REG_BTR1 SJA_BaseAdr+0x07 //总线定时寄存器1
#define REG_OCR SJA_BaseAdr+0x08 //输出控制寄存器
#define REG_TEST SJA_BaseAdr+0x09 //测试寄存器

#define REG_RESVER1 SJA_BaseAdr+0x0A //保留1
#define REG_ARBITRATE SJA_BaseAdr+0x0B //仲裁丢失捕捉
#define REG_ERRCATCH SJA_BaseAdr+0x0C //错误代码捕捉
#define REG_ERRLIMIT SJA_BaseAdr+0x0D //错误报警限额

#define REG_RXERR SJA_BaseAdr+0x0E //接收错误计数器
#define REG_TXERR SJA_BaseAdr+0x0F //发送错误计数器

#define REG_ACR1 SJA_BaseAdr+0x10 //验收代码寄存器
#define REG_ACR2 SJA_BaseAdr+0x11 //验收代码寄存器
#define REG_ACR3 SJA_BaseAdr+0x12 //验收代码寄存器
#define REG_ACR4 SJA_BaseAdr+0x13 //验收代码寄存器
#define REG_AMR1 SJA_BaseAdr+0x14 //验收屏蔽寄存器
#define REG_AMR2 SJA_BaseAdr+0x15 //验收屏蔽寄存器
#define REG_AMR3 SJA_BaseAdr+0x16 //验收屏蔽寄存器
#define REG_AMR4 SJA_BaseAdr+0x17 //验收屏蔽寄存器

// 发送缓冲区寄存器
#define REG_TXD_FID SJA_BaseAdr+0x10 //发送缓冲区1
#define REG_TXD_ID1 SJA_BaseAdr+0x11 //发送缓冲区2
#define REG_TXD_ID2 SJA_BaseAdr+0x12 //发送缓冲区3
#define REG_TXD_ID3 SJA_BaseAdr+0x13 //发送缓冲区4
#define REG_TXD_ID4 SJA_BaseAdr+0x14 //发送缓冲区5
#define REG_TXBuffer1 SJA_BaseAdr+0x15 //发送缓冲区6
#define REG_TXBuffer2 SJA_BaseAdr+0x16 //发送缓冲区7
#define REG_TXBuffer3 SJA_BaseAdr+0x17 //发送缓冲区8
#define REG_TXBuffer4 SJA_BaseAdr+0x18 //发送缓冲区9
#define REG_TXBuffer5 SJA_BaseAdr+0x19 //发送缓冲区10
#define REG_TXBuffer6 SJA_BaseAdr+0x1A //发送缓冲区11
#define REG_TXBuffer7 SJA_BaseAdr+0x1B //发送缓冲区12
#define REG_TXBuffer8 SJA_BaseAdr+0x1C //发送缓冲区13

// 接收缓冲区寄存器
#define REG_RXD_FID SJA_BaseAdr+0x10 //接收缓冲区1
#define REG_RXD_ID1 SJA_BaseAdr+0x11 //接收缓冲区2
#define REG_RXD_ID2 SJA_BaseAdr+0x12 //接收缓冲区3
#define REG_RXD_ID3 SJA_BaseAdr+0x13 //接收缓冲区4
#define REG_RXD_ID4 SJA_BaseAdr+0x14 //接收缓冲区5
#define REG_RXBuffer1 SJA_BaseAdr+0x15 //接收缓冲区6
#define REG_RXBuffer2 SJA_BaseAdr+0x16 //接收缓冲区7
#define REG_RXBuffer3 SJA_BaseAdr+0x17 //接收缓冲区8
#define REG_RXBuffer4 SJA_BaseAdr+0x18 //接收缓冲区9
#define REG_RXBuffer5 SJA_BaseAdr+0x19 //接收缓冲区10
#define REG_RXBuffer6 SJA_BaseAdr+0x1A //接收缓冲区11
#define REG_RXBuffer7 SJA_BaseAdr+0x1B //接收缓冲区12
#define REG_RXBuffer8 SJA_BaseAdr+0x1C //接收缓冲区13

#define REG_RXCOUNT SJA_BaseAdr+0x1D //RX报文计数器
#define REG_RBSA SJA_BaseAdr+0x1E //接收缓冲区起始地址
#define REG_CDR SJA_BaseAdr+0x1F //时钟分频寄存器

/*
功能说明: CAN控制器SJA1000通讯波特率.SJA1000的晶振为必须为
16MHZ*/

#define BTR0_Rate_20k 0x53 //20KBPS的预设值
#define BTR1_Rate_20k 0x2F //20KBPS的预设值
#define BTR0_Rate_40k 0x87 //40KBPS的预设值
#define BTR1_Rate_40k 0xFF //40KBPS的预设值
#define BTR0_Rate_50k 0x47 //50KBPS的预设值
#define BTR1_Rate_50k 0x2F //50KBPS的预设值
#define BTR0_Rate_80k 0x83 //80KBPS的预设值
#define BTR1_Rate_80k 0xFF //80KBPS的预设值
#define BTR0_Rate_100k 0x43 //100KBPS的预设值
#define BTR1_Rate_100k 0x2f //100KBPS的预设值
#define BTR0_Rate_125k 0x03 //125KBPS的预设值
#define BTR1_Rate_125k 0x1c //125KBPS的预设值
#define BTR0_Rate_200k 0x81 //200KBPS的预设值
#define BTR1_Rate_200k 0xFA //200KBPS的预设值
#define BTR0_Rate_250k 0x01 //250KBPS的预设值
#define BTR1_Rate_250k 0x1c //250KBPS的预设值
#define BTR0_Rate_400k 0x80 //400KBPS的预设值
#define BTR1_Rate_400k 0xfa //400KBPS的预设值
#define BTR0_Rate_500k 0x00 //500KBPS的预设值
#define BTR1_Rate_500k 0x1c //500KBPS的预设值
#define BTR0_Rate_666k 0x80 //666KBPS的预设值
#define BTR1_Rate_666k 0xb6 //666KBPS的预设值
#define BTR0_Rate_800k 0x00 //800KBPS的预设值
#define BTR1_Rate_800k 0x16 //800KBPS的预设值
#define BTR0_Rate_1000k 0x00 //1000KBPS的预设值
#define BTR1_Rate_1000k 0x14 //1000KBPS的预设值
//命令字
#define TR_CMD 0X01
#define AT_CMD 0X02
#define RRB_CMD 0X04
#define COS_CMD 0X08
#define GTS_CMD 0X10
//错误字

#define CAN_INTERFACE_OK 0
#define CAN_BUS_OK 0
#define CAN_INTERFACE_ERR 0XFF
#define CAN_ENTERSET_ERR 0XFE
#define CAN_QUITSET_ERR 0XFD
#define CAN_INITOBJECT_ERR 0XFC
#define CAN_INITBTR_ERR 0XFB
#define CAN_INITOUTCTL_ERR 0XFA
#define CAN_INTCLKDIV_ERR 0XF9
#define CAN_BUS_ERR 0XF8

//系统指针，指向SJA1000

unsigned char xdata *SJA_B CANAdr;
unsigned char data Tmod_data;
unsigned char run_lamp_flush_count = 0;
unsigned char run_lamp_flush_time = 10;
sbit run_lamp = P1^1;
unsigned char data send_data[10],rcv_data[10];
unsigned int data rxbuffer[10]={REG_RxBuffer1,REG_RxBuffer2,REG_RxBuffer3,REG_RxBuffer4,REG_RxBuffer5,REG_RxBuffer6,REG_RxBuffer7,REG_RxBuffer8,REG_RxBuffer9,REG_RxBuffer10};

unsigned int data txbuffer[10]={REG_TxBuffer1,REG_TxBuffer2,REG_TxBuffer3,REG_TxBuffer4,REG_TxBuffer5,REG_TxBuffer6,REG_TxBuffer7,REG_TxBuffer8,REG_TxBuffer9,REG_TxBuffer10};
unsigned char bdata flag_init;
sbit rcv_flag=flag_init^0;
sbit err_flag=flag_init^0;
sbit cs=P2^7;

bit B CAN_CREAT_COMMUNATION(void)
{ SJA_B CANAdr=REG_TEST;
*SJA_B CANAdr=0XAA;
if(*SJA_B CANAdr==0XAA)
{return 0;}
else
{return 1;}
}

bit B CAN_ENTER_RETMODEL(void)
{
unsigned char tempdata;
SJA_B CANAdr=REG_CONTROL;
tempdata=*SJA_B CANAdr;
*SJA_B CANAdr=(tempdata|0x01);
if(*SJA_B CANAdr&0X01==0X01)
{return 0;}
else
{return 1;}
}

bit B CAN_QUIT_RETMODEL(void)
{
unsigned char tempdata;
SJA_B CANAdr=REG_CONTROL;
tempdata=*SJA_B CANAdr;
*SJA_B CANAdr=(tempdata&0xFE);
if(*SJA_B CANAdr&0X01==0X00)
{return 0;}
else
{return 1;}
}

bit B CAN_SET_BANDRATE(unsigned char CAN_ByteRate)
{
unsigned char BR_Num= CAN_ByteRate,BTR0_num,BTR1_num;
switch (BR_Num)
{
case ByteRate_40k :
BTR0_num=0x87;
BTR1_num=0xff;
break;
case ByteRate_50k :
BTR0_num=0x47;
BTR1_num=0x2f;
break;
case ByteRate_80k :
BTR0_num=0x83;
BTR1_num=0xff;
break;
case ByteRate_100k :
BTR0_num=0x43;
BTR1_num=0x2f;
break;
case ByteRate_200k :
BTR0_num=0x81;
BTR1_num=0xfa;
break;
case ByteRate_400k :
BTR0_num=0x80;
BTR1_num=0xfa;
break;
case ByteRate_500k :
BTR0_num=0x01;
BTR1_num=0x1c;
break;
case ByteRate_800k :
BTR0_num=0x00;
BTR1_num=0x16;
break;
case ByteRate_1000k :
BTR0_num=0x00;
BTR1_num=0x14;
break;
default :
return 1;
break;
}

SJA_B CANAdr=REG_BTR0;
*SJA_B CANAdr=BTR0_num;
if(*SJA_B CANAdr!=BTR0_num)
{return 1;}
SJA_B CANAdr=REG_BTR1;
*SJA_B CANAdr=BTR1_num;
if(*SJA_B CANAdr!=BTR1_num)
{return 1;}
return 0;
}

bit B CAN_SET_OBJECT(unsigned char B CAN_ACR,unsigned char B CAN_AMR)
{

SJA_B CANAdr=REG_ACR;
*SJA_B CANAdr= B CAN_ACR;
if(*SJA_B CANAdr!= B CAN_ACR)
{return 1;}

SJA_B CANAdr=REG_AMR;
*SJA_B CANAdr= B CAN_AMR;
if(*SJA_B CANAdr!= B CAN_AMR)
{return 1;}

return 0;
}

bit B CAN_SET_OUTCLK(unsigned char OUT_CONTROL,unsigned char CLOCK_OUT)
{

SJA_B CANAdr=REG_OCR;
*SJA_B CANAdr= OUT_CONTROL;
if(*SJA_B CANAdr!= OUT_CONTROL)
{return 1;}

SJA_B CANAdr=REG_CDR;
*SJA_B CANAdr= CLOCK_OUT;
if(*SJA_B CANAdr!= CLOCK_OUT)
{return 1;}
else
return 0;
}

bit B CAN_DATA_WRITE(unsigned char *senddatabuf)
{
unsigned char tempcount,i;
SJA_B CANAdr=REG_STATUS;
if((*SJA_B CANAdr&0x08)==0)
{return 1;}

if((*SJA_B CANAdr&0x04)==0)
{return 1;}

SJA_B CANAdr=REG_TxBuffer1;
if((senddatabuf[1]&0x10)==0)
{tempcount=(senddatabuf[1]&0x0f)+2;}
else
{tempcount=2;}
for (i=0;i{
SJA_B CANAdr=txbuffer[i];//发送区的地址区
*SJA_B CANAdr=senddatabuf[i];
}
memcpy(SJA_B CANAdr,senddatabuf,tempcount);
return 0;
}
bit B CAN_DATA_RECEIVE(unsigned char *RCVdatabuf)
{
unsigned char tempcount;
SJA_B CANAdr=REG_STATUS;
if((*SJA_B CANAdr&0x01)==0)
{return 1;}
SJA_B CANAdr=REG_RxBuffer2;
if((*SJA_B CANAdr&0x10)==0)

{ tempcount=(*SJA_B CANAdr&0x0f)+2;}
else
{ tempcount=2;}
SJA_B CANAdr=REG_RxBuffer1;
memcpy(RCVdatabuf,SJA_B CANAdr,tempcount);
return 0;
}
bit B CAN_CMD_PGR(unsigned char cmd)
{
SJA_B CANAdr=REG_COMMAND;
*SJA_B CANAdr= cmd;
switch (cmd)
{
case TR_CMD:
return 0;
break;
case AT_CMD:
SJA_B CANAdr=REG_STATUS;
if((*SJA_B CANAdr&0X20)==0)
{return 0;}
else
{return 1;}
break;

case RRB_CMD:
SJA_B CANAdr=REG_STATUS;
if((*SJA_B CANAdr&0X01)==1)
{return 1;}
else
{return 0;}
break;

case COS_CMD:
SJA_B CANAdr=REG_STATUS;
if((*SJA_B CANAdr&0X02)==0)
{return 0;}
else
{return 1;}
break;

case GTS_CMD:
return 0;
break;
default :
return 1;
break;
}
}

void ex0_init(void) interrupt 0 using 1
{
SJA_B CANAdr=REG_INTERRUPT;
flag_init=*SJA_B CANAdr;
}
void Init_Cpu( void )
{
PX0=1;
IT0=1;
EX0=1;
ET0=1;
EA=1;
cs=0;
}

void Init_SJA( void )
{
B CAN_ENTER_RETMODEL();
B CAN_SET_BANDRATE(8);
B CAN_SET_OBJECT(0x00,0x00);
B CAN_SET_OUTCLK(0xAA,0X48);
B CAN_QUIT_RETMODEL();
SJA_B CANAdr=REG_CONTROL;
*SJA_B CANAdr|=0x1e;
}

void T0IN (void) interrupt 1 using 2
{
TR0=0;
if(run_lamp_flush_count >= run_lamp_flush_time)
{
if(run_lamp)
{ run_lamp = 0; run_lamp_flush_time = 0; }
else
{ run_lamp = 1; run_lamp_flush_time = 40; }
run_lamp_flush_count = 0;
}
else
run_lamp_flush_count++;
TH0=0X4C;
TL0=0X00;
TR0=1;
}
void initt0(void)
{
Tmod_data=TMOD;
Tmod_data&=0X0F;
Tmod_data|=0x01;
TMOD=Tmod_data;
TH0=0X4C;
TL0=0X00;
TR0=1;
}

void main (void)
{
unsigned int delay;
for(delay=0;delay<30000;delay++) {; } // 复位延时
initt0();
Init_Cpu();
cs=1;
Init_SJA();
flag_init=0X00;

while (1)
{
if (rcv_flag)
{
rcv_flag=0;
B CAN_DATA_RECEIVE(rcv_data);

B CAN_CMD_PGR(0x04);
}
if(err_flag)
{
err_flag=0;
Init_SJA();
}
}
}
答 1: 是不是已经能发能收了. 答 2: CAN好像是还有问题，您有这方面的程序吗？能否发一份给小弟。
email：ninglg@eyou.com 答 3: !!这几天我也正在调试这程序,现在看到的,都不行直接拿来用,你现在主要是什么问题. 答 4: 加油调试大哥 加油调试 小弟的项目也是这个 我软件方面是大白
如果可以的化 把调试好的程序发给我 不胜感激
zxc2701078@126.com 答 5: CAN我现在的问题是软件模拟调试时程序乱飞，DATA区的显示不正确 答 6: reningligel: 能把你私有的头文件给我么？ 不胜感谢，我也是拿周立功原来的论坛上的源码改的程序，但是原来的那个头文件不见了，


qq： 324007330
mail：joe_chenyj@163.com 答 7: CAN
没有私有的头文件，头文件都是51自带的，你看程序的开始部分

顺便问一句，定时器0中断除了定义波特率，在这还有什么用途 答 8: 定时器0中断除了定义波特率,还定义同步跳转宽度(SJM)的值. 答 9: 我也在搞这个 答 10: 请问现在能工作了吗．我也正在搞这个．．还没个谱 答 11: 我也发了个程序，但我的不能收发,希望交流我也发了个程序，但我的不能收发，不知为什么，希望和你交流一下
我qq：32606290，油箱：ilf137@sina.com