大家好，以下是我的CAN总线程序，当我调试的时候，刚开始初始化定时器0和CPU，而程序总是从Data的62开始，而且变化为EC，为什么？希望大家讨论 #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_CONTROL SJA_BaseAdr+0X00 #define REG_COMMAND SJA_BaseAdr+0X01 #define REG_STATUS SJA_BaseAdr+0X02 #define REG_INTERRUPT SJA_BaseAdr+0X03 #define REG_ACR SJA_BaseAdr+0X04 #define REG_AMR SJA_BaseAdr+0X05 #define REG_BTR0 SJA_BaseAdr+0X06 #define REG_BTR1 SJA_BaseAdr+0X07 #define REG_OCR SJA_BaseAdr+0X08 #define REG_TEST SJA_BaseAdr+0X09 //发送缓冲区寄存器定义 #define REG_TxBuffer1 SJA_BaseAdr+0X0a #define REG_TxBuffer2 SJA_BaseAdr+0X0b #define REG_TxBuffer3 SJA_BaseAdr+0X0c #define REG_TxBuffer4 SJA_BaseAdr+0X0d #define REG_TxBuffer5 SJA_BaseAdr+0X0e #define REG_TxBuffer6 SJA_BaseAdr+0X0f #define REG_TxBuffer7 SJA_BaseAdr+0X10 #define REG_TxBuffer8 SJA_BaseAdr+0X11 #define REG_TxBuffer9 SJA_BaseAdr+0X12 #define REG_TxBuffer10 SJA_BaseAdr+0X13 //接受缓冲区寄存器定义 #define REG_RxBuffer1 SJA_BaseAdr+0X14 #define REG_RxBuffer2 SJA_BaseAdr+0X15 #define REG_RxBuffer3 SJA_BaseAdr+0X16 #define REG_RxBuffer4 SJA_BaseAdr+0X17 #define REG_RxBuffer5 SJA_BaseAdr+0X18 #define REG_RxBuffer6 SJA_BaseAdr+0X19 #define REG_RxBuffer7 SJA_BaseAdr+0X1a #define REG_RxBuffer8 SJA_BaseAdr+0X1b #define REG_RxBuffer9 SJA_BaseAdr+0X1c #define REG_RxBuffer10 SJA_BaseAdr+0X1d //时钟分频寄存器 #define REG_CDR SJA_BaseAdr+0X1F /* 功能说明: CAN控制器SJA1000通讯波特率.SJA1000的晶振为必须为 16MHZ*/ #define ByteRate_40k 0x01 #define ByteRate_50k 0x02 #define ByteRate_80k 0x03 #define ByteRate_100k 0x04 #define ByteRate_200k 0x05 #define ByteRate_400k 0x06 #define ByteRate_500k 0x07 #define ByteRate_800k 0x08 #define ByteRate_1000k 0x09 //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_BCANAdr; 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; //bit bunflag; sbit cs=P2^7; bit BCAN_CREAT_COMMUNATION(void) { SJA_BCANAdr=REG_TEST; *SJA_BCANAdr=0XAA; if(*SJA_BCANAdr==0XAA) {return 0;} else {return 1;} } bit BCAN_ENTER_RETMODEL(void) { unsigned char tempdata; SJA_BCANAdr=REG_CONTROL; tempdata=*SJA_BCANAdr; *SJA_BCANAdr=(tempdata|0x01); if(*SJA_BCANAdr&0X01==0X01) {return 0;} else {return 1;} } bit BCAN_QUIT_RETMODEL(void) { unsigned char tempdata; SJA_BCANAdr=REG_CONTROL; tempdata=*SJA_BCANAdr; *SJA_BCANAdr=(tempdata&0xFE); if(*SJA_BCANAdr&0X01==0X00) {return 0;} else {return 1;} } bit BCAN_SET_BA