#include
/* These macro define simple data type */ #define uchar unsigned char #define ulint unsigned long #define uint unsigned int
/* These macro for Mudbus function code */ #define ReadCoilSta 0x01 // 0X read coil function
#define ForceSingleCoil 0x05 // 0X force single coil function #define ReadHoldReg 0x03 // 4X read input register #define PresetMulReg 0x06 // 4X write multi register
/* These macro describe index of communiction message from start to end */
#define CommIndexSlaveID 0 // macro for slave ID
#define CommIndexFunction 1 // macro for function code #define CommIndexStartAdrHi 2 // macro for data hight adr #define CommIndexStartAdrLo 3 // macro for data low adr
#define CommIndexNoPointHi 4 // macro for hight quantity datas #define CommIndexNoPointLo 5 // macro for low quantity datas
/* These macro describe recieve message lenght of different function code */
/* But not include data lenght ,the data is master write to slave */
/* because we don't know the data lenght prior, it depend on ComBuf[ComIndexNoPoint] value */ #define ReadCoilStaIndexEnd 7 // 0~7,0x01,0X #define ForceSingleCoilIndexEnd 7 // 0~7,0x05,0X #define ReadHoldRegIndexEnd 7 // 0~7,0x03,4X #define PresetMulRegIndexEnd 7 // 0~8,0x10,4X
/* these macro describe send or recieve allowed */ #define SEND 1 // send allowed #define RECIEVE 0 // recieve allowed #define SlaveID 0x01 // the slave's ID
#define SendRecieveDelay 50 // Send turn to Recieve or Recieve turn to Send delay time vlaue
#define MaxDataLen 30 // preset CommBuf array Max lenght #define MaxRegLen 20 // preset SlaveOutputBuf Max lenght /* variable for modbus is following */ bit data RecFinishF; uchar data CommIndex; uchar data writeadr;
uchar data CommIndexEnd;
uchar idata CommBuf[MaxDataLen];
uchar idata SlaveOutputBuf[MaxRegLen]; // Hight 8 bit of word is front,Low 8 bit is back uchar idata SlaveInputBuf[MaxRegLen]; uchar data *port _at_ 0x7F ; /* exp data define */
//#define SlaveAdr XBYTE [0xD800] sbit LED0=P1^0; sbit LED1=P1^1; sbit LED2=P1^2; sbit LED3=P1^3; sbit LED4=P1^4; sbit LED5=P1^5; sbit LED6=P1^6; sbit LED7=P1^7;
uchar idata ForceCoilBuf[10]; uchar count=0;
uchar forceval=0x00; //bit forcesendF=0;
/* Table Of CRC Values for high-order byte */ /* CRC 高位字节值表 */ uchar code auchCRCHi[] = {
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, 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 } ;
/* Table of CRC values for low-order byte */ /* CRC低位字节值表*/ uchar 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, 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 } ;
//进行CRC校验生成CRC校验码函数
uint crc16(uchar *puchMsg,uchar usDataLen) // puchMsg message to calculate CRC upon 进行CRC校验函数
{ // usDataLen quantity of bytes in message uchar uchCRCHi = 0xFF ; // high byte of CRC initialized /* 高CRC字节初始化 */ uchar uchCRCLo = 0xFF ; // low byte of CRC initialized /* 低CRC 字节初始化 */ uint uIndex ; // will index into CRC lookup table /* CRC循环中的索引 */ while (usDataLen--) // Pass through message buffer /* 传输消息缓冲区 */ {
uIndex = uchCRCHi ^ *puchMsg++ ; // calculate the CRC /* 计算CRC */ uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ; uchCRCLo = auchCRCLo[uIndex] ; }
return (((uint)(uchCRCLo) << 8) | uchCRCHi) ; }
/*------------- init code is following ----------------*/ void initSFR(void) //初始化串口 {
TH1=0xfa;
TL1=0xfa; // botelv set 9600 bps/s 设置9600波特率
TMOD=0x21; // T1 8bit timer for uart band rate, T0 16bit timer PCON=PCON | 0x80; // band rate is 2 times 波特率倍增
SCON=0x50; // uart mode is 01,start bit + 8 bit data +stop bit : peer to peer communication 0101 0000 8位数据位打开允许串行接受端 PS=1; // uart intrrupt is hightest 串行口优先级设定位； TR1=1; // start T1 T1运行控制位，其功能与TR0类同。置1时定时
器开始工作，置0时定时器停止工作
ES=1; // serially interrupt allow 串行口允许中断 EA=1; // chief interrupt allow 打开全局是能 }
void initvar(void) //初始化 {
uchar i;
for (i=0;i<=250;i++) //延时 _nop_();
T0=RECIEVE; //T0=0x01; sbit T0 = P3^4;
RecFinishF=0; // bit data RecFinishF; CommIndex=0; //uchar data CommIndex; CommIndexEnd=0xff; // First enlarge recieve lenght //uchar data CommIndexEnd;
for (i=0;i SlaveOutputBuf[i]=0; //uchar idata SlaveInputBuf[MaxRegLen]; } void init(void) { initSFR(); //初始化设置串口波特率参数 initvar(); } void AnalyzeRecieve(void) { uint crc16tem; uchar i; if (CommBuf[CommIndexSlaveID]==SlaveID) // The slave ID is matched #define SlaveID 0x01 // the slave's ID { crc16tem=crc16(CommBuf,CommIndex-1); // calculate CRC check, erase two CRC byte 进行CRC校验 if (crc16tem==(((uint)(CommBuf[CommIndexEnd]) << 8) | CommBuf[CommIndexEnd-1])) { // crc16 check is OK switch (CommBuf[CommIndexFunction]) //#define CommIndexFunction 1 // macro for function code { // uchar idata CommBuf[MaxDataLen]; case ReadCoilSta: //#define ReadCoilSta 0x01 // 0X read coil function CommBuf[0]=0x01; // 0 CommBuf[1]=0x01; // 1 CommBuf[2]=CommBuf[5] / 0x08; // 0x16 bit CommIndexNoPointLo 5 //for (i=0;i
