📄 modbus.c
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//modbus module.
#include "pic16f62xa.h"
#include "pic.h"
#include "typedefine.h"
#include "extern.h"
//host station.
#define RERECEVIE RB4=0
#define RESEND RB4=1
#define FLASE 0
#define TRUE 1
#define BRCLK 8000000
#define FRAMEOVERCOU 1000.0*40/BAUD
#define HOSTADDR 0xff
bank2 uchar FrameOverCou;
bank2 uchar eepaddr=0;
//CRC 高位字节值表
const uchar 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
} ;
// CRC低位字节值表
const uchar 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
} ;
char ParityBitTwo(const char *p_data );
//uint CRC16(uchar *puchMsg, uint usDataLen) ;
//清零数组 行参1:数组首指针. 行参2:清零字节长.
void ClearBus(char *p_array2,char ClearLength)
{
do
{
*p_array2++ = 0; // <=> *(p_Array++) = 0;
}
while( --ClearLength > 0);
} //void ClearBus(char *p_array2,char ClearLength)
//MyWord CRC16(MyByte *data, int iLength);
//串口初始化.
void Uart_ini(void)
{
uint BAUD;
GIE = 1;
TRISB |= 0b00000110; // RB1,RB2 input.
RBPU = 0; //low availability
// TRISB4 = 0; // /RE pin output.
// GetCntMax = 49;
// GetCnt = 0;
// ClearBus(GetDataBus,10); //clear receive buffer.
switch (1) //(SerialSet.bits.band) //串口初始化
{
case 0: BAUD = 4800; break; //波特率初始化
case 1: BAUD = 9600; break; //
case 2: BAUD = 19200; break; //
case 3: BAUD = 38400; break; //
case 4: BAUD = 57600; break; //
default: BAUD = 9600; break; //
}
SPBRG = BRCLK/BAUD/16-1; //clock fiequency.
//set baudrate to BAUD rate.
FrameOverCou = (uchar)(FRAMEOVERCOU);
FrameOverCou += 1;
TXSTA = 0b10000100; //8 bit send.
//asynchronism module.
//bit2 BRGH:1 = high speed.
// 0 = low speed.
//bit5 TXEN:1 = enable send.
// 0 = disable send.
//bit1 TRMT:1 = TSR empty.
// 0 = TSR full.
//bit0 TX9D:send data ninth bit.
RCSTA = 0b00100000; //bit7 spen:1 = enable serial.
// 0 = disable serial.
//bit6 RX9 :1 = choose 9bit receive,
// 0 = choose 8bit receive.
//bit2 FERR:frame error bit,
//bit1 OERR:overflow error bit,
//bit0 RX9D:receive data ninth bit.
TX9 = 1;
RX9 = 1;
RCREG = 0; //clear receive register.
//
SPEN = 1;
TXIE = 0; //TXIE = 1;
TXEN = 0; //TXEN = 1;
CREN = 0;
RCIE = 0;
// CREN = 1; //RCIE = 1;
// RCIE = 1; //CREN = 1;
UartStruct.bits.HostStatus = 0; //空闲
// RERECEVIE; //RB4 re pin : 0 recevie, 1 transmit.
}//void Uart_ini(void)
//使能发送.
void En_Transmit(void)
{
// RESEND;
UartStruct.bits.HostStatus = 2;
// GetCnt = 0;
// TxLengthCnt = 5;
sendPosi = 0;
if(sendCount>1)
sendCount--;
TX9D = ParityBitTwo(&sendBuf[sendPosi]); //这里添加奇偶校验
TXREG = sendBuf[0];
TXEN = 1;
TXIE = 1;
//enable serial.
//enable serial interrupt.
}//void En_Transmit(void)
//使能接受
void En_Receive(void)
{
UartStruct.bits.HostStatus = 1; // 0 空闲.1 接受.2 发送.
// RERECEVIE;
// TXEN = 0;
// TXIE = 0;
CREN = 1;
RCIE = 1;
}//void En_Receive(void)
//enable idlesse. //现在只有在交验正确的时候调用
void En_Idlesse(void)
{
UartStruct.bits.HostStatus = 0;
CREN = 0;
RCIE = 0;
// TXEN = 0;
// TXIE = 0;
}//void En_Idlesse(void)
//单键发送,在按键标记为1时被处理模块调用
void singleKeyTranmit(void)
{
uint crcResult;
keyHold = Key_V;
sendBuf[0] = 0x01;
sendBuf[1] = 0xaa;
switch(keyHold)
{
case 0: sendBuf[2] = 0x00; break;// 0x45; break;
case 1: sendBuf[2] = 0x01; break;// 0x16; break;
case 2: sendBuf[2] = 0x02; break;// 0x1e; break;
case 3: sendBuf[2] = 0x03; break;// 0x26; break;
case 4: sendBuf[2] = 0x04; break;// 0x25; break;
case 5: sendBuf[2] = 0x05; break;// 0x2e; break;
case 6: sendBuf[2] = 0x06; break;// 0x36; break;
case 7: sendBuf[2] = 0x07; break;// 0x3d; break;
case 8: sendBuf[2] = 0x08; break;// 0x3e; break;
case 9: sendBuf[2] = 0x09; break;// 0x46; break;
case 10: sendBuf[2] = 0x0a; break;
case 11: sendBuf[2] = 0x0b; break;
case 13: sendBuf[2] = 13; break;
case 14: sendBuf[2] = 14; break;
case 15: sendBuf[2] = 15; break;
case 16: sendBuf[2] = 16; break;
case 17: sendBuf[2] = 17; break;
case 18: sendBuf[2] = 18; break;
case 19: sendBuf[2] = 19; break;
case 20: sendBuf[2] = 20; break;
case 21: sendBuf[2] = 21; break;
case 22: sendBuf[2] = 22; break;
case 23: sendBuf[2] = 24; break;
case 24: sendBuf[2] = 24; break;
default:sendBuf[2] = 0x99; break;
}
crcResult = CRC16(sendBuf,3);
sendBuf[3] = (uchar)(crcResult&0x00ff); //低校验字节在前
sendBuf[4] = (uchar)((crcResult&0xff00)>>8);
sendCount = 5;
// sendPosi = 0;
//---------------test---------------
// WriteEEPROM(sendBuf,5,0x00);
// testEepromAddr += 5;
En_Transmit();
}
void checkComm0Modbus(void)
{
uint crcData;
if(receCount > 4) //最小帧字节为5.
{
switch(receBuf[1])
{
case 1:
break;
case 2:
break;
case 3:
break;
case 0xaa:
if(receCount >= 5)
{
//-----------------------------------------------------------------
// WriteEEPROM(&receBuf[0],5,eepaddr);
// eepaddr +=5;
// if(eepaddr>=200)
// eepaddr = 0;
//-----------------------------------------------------------------
if(receBuf[0] == HOSTADDR && errorCheckout == 0)
{
crcData = CRC16(receBuf,3);
// 0xff6f
// if(crcData == receBuf[5]+(receBuf[4]<<8))
if(crcData == receBuf[4]+(receBuf[3]<<8))
{//接受从站回应校验正确.
if(0x55 == receBuf[2])
{
LedShowLink = 1616; // setting ok
//--------------------
// WriteEEPROM(&receBuf[0],1,eepaddr);
// eepaddr +=5;
// if(eepaddr>=200)
// eepaddr = 0;
//-------------------
}
}
}// if(receBuf[0] == HOSTADDR)
receCount = 0;
errorCheckout = 0;
}
break;
default:
break;
}// switch(receBuf[1])
}// if(receCount > 4)
}
//crc16读表
uint CRC16(uchar *puchMsg, uint usDataLen)
{
uchar uchCRCHi = 0xFF ; // 高CRC字节初始化
uchar uchCRCLo = 0xFF ; // 低CRC 字节初始化
ulong uIndex ;
while (usDataLen--)
{
uIndex = uchCRCHi ^ *puchMsg++ ; /* 计算CRC */
uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ;
uchCRCLo = auchCRCLo[uIndex] ;
}
return (uchCRCHi << 8 | uchCRCLo) ;
}//uint16 crc16(uint8 *puchMsg, uint16 usDataLen)
//调用 ParityBit(),返回添加奇偶校验位.(64us once)
char ParityBitTwo(const char *p_data )
{
char tempchar=0, tempcount ,temp_a=0,result=0;
tempchar = *p_data;
for(tempcount = 8; tempcount > 0; tempcount--)
{
temp_a = tempchar & 0x01;
if(1 == temp_a)
{
result += 1;
}
tempchar >>= 1;
}
return(result&0x01);
}//char ParityBit(const char *p_data )
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