STM32单片机的MODBUS通讯器毕业论文 - 图文(14)

基于单片机的MODBUS通讯器设计

0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 } ;

/* CRC低位字节值表*/

const unsigned char code auchCRCLo[] = {

0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A, 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3, 0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3,

39

基于单片机的MODBUS通讯器设计

0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4, 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26, 0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68, 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5, 0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92, 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C, 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C, 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80, 0x40 } ;

//整个MODBUS函数初始化 void initProg(void) {

S2CON = 0x50;

BRT = 256-12000000/32/BAUD; AUXR = 0x14; IE2 = 0x01; TL0=0xe6; TH0=0x9c;

40

基于单片机的MODBUS通讯器设计

}

unsigned int crc16(unsigned char *puckMsg,unsigned int usDataLen) {

unsigned char uchCRCHi = 0xFF ; /* 高CRC字节初始化 */ unsigned char uchCRCLo = 0xFF ; /* 低CRC 字节初始化 */ unsigned long uIndex ; /* CRC循环中的索引 */ while (usDataLen--) /* 传输消息缓冲区 */ { }

return (uchCRCHi << 8 | uchCRCLo) ;

uIndex = uchCRCHi ^ *puckMsg++ ; /* 计算CRC */ uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ; uchCRCLo = auchCRCLo[uIndex] ; ET0 = 1;

}//uint16 crc16(uint8 *puchMsg, uint16 usDataLen) //开始发送

void beginSend(void) { }

-------------------暂时不用--------------------*/ //读可读写模拟量寄存器（保持寄存器） 0x03 /*--------------------------------------------- 主机发送格式（0x03）

41

b232Send=1;//设为发送 sendPosi=0;//设定初始发送位置 if(sendCount>1) sendCount--; S2BUF=sendBuf[0];

基于单片机的MODBUS通讯器设计

［设备地址］［0x03］［寄存器起始高地址］［寄存器起始低地址］［读寄存器数量高］［读寄存器数量低］［CRC低8］［CRC低8］ 从机回复格式（0x03）

［设备地址］［0x03］［返回字节个数］［数据1高8］［数据1低8］［数据2高8］［数据2低8］～～［数据n］［CRC低8］［CRC低8］ ---------------------------------------------*/ void readRegisters(void) {

unsigned char addr,tempAddr,readCount,byteCount;//1代表完成 0代表出错。 unsigned int crcData,i,tempData; addr=receBuf[3]; tempAddr=addr; readCount=receBuf[5]; byteCount=readCount*2;

for(i=0;i

sendBuf[0]=localAddr; sendBuf[1]=0x03; sendBuf[2]=byteCount; byteCount=byteCount+3;

crcData=crc16(sendBuf,byteCount); sendBuf[byteCount]=(crcData>>8); byteCount++;

sendBuf[byteCount]=crcData&0xff; sendCount=byteCount+1; beginSend();

42

tempData=get_Reg(tempAddr); sendBuf[i+3]=tempData>>8; sendBuf[i+4]=tempData&0xff;

基于单片机的MODBUS通讯器设计

}

//读只可读模拟量寄存器 0x04 与0x03类似 /*--------------------------------------------- 主机发送格式（0x04）

［设备地址］［0x04］［寄存器起始高地址］［寄存器起始低地址］［读寄存器数量高］［读寄存器数量低］［CRC低8］［CRC低8］ 从机回复格式（0x04）

［设备地址］［0x04］［返回字节个数］［数据1高8］［数据1低8］［数据2高8］［数据2低8］～～［数据n］［CRC低8］［CRC低8］ ---------------------------------------------*/ void read_Registers(void) {

unsigned char addr,tempAddr,readCount,byteCount;//1代表完成 0代表出错。 unsigned int crcData,i,tempData; addr=receBuf[3]; tempAddr=addr; readCount=receBuf[5]; byteCount=readCount*2;

for(i=0;i

sendBuf[0]=localAddr; sendBuf[1]=0x04; sendBuf[2]=byteCount; byteCount=byteCount+3;

crcData=crc16(sendBuf,byteCount); sendBuf[by …… 此处隐藏：3230字，全部文档内容请下载后查看。喜欢就下载吧 ……