📄 bzh-com.c
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#define XBYTE ((unsigned char volatile *) 0x20000L)
/* CRC 高位字节值表 */
code unsigned char 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*/
code unsigned char 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
};
unsigned int sendleng = 0;
//#define addr273 XBYTE[0x8fff]
extern idata unsigned char sysSet[14]; /*sysSet[12],自动打印标志；sysSet[13],存储机号*/
void hexAsc(unsigned char length,unsigned char *point);
//void ascHex(unsigned char length,unsigned char *point);
void rs485(void);
void protocol(void);
unsigned int CRC16(unsigned char *puchMsg, unsigned int usDataLen);
void delay(unsigned char microsecond);
//extern void commun3(void);
sbit ES = 0xAC;
sbit TI = 0x99;
sbit RI = 0x98;
sfr SBUF = 0x99;
sbit TB8 = 0x9B;
xdata unsigned char TxBuf[100];
idata unsigned char txPoint;
xdata unsigned char RxBuf[10];
idata unsigned char rxPoint;
extern xdata unsigned char ctrOut;
extern xdata float testResult[6];
idata unsigned char addrcode[2]; //机号地址
extern bit commFlag ;
sfr P3 = 0xB0;
sfr P1 = 0x90;
sbit RX_TX = P1^7;
void communicationmodbus(void) interrupt 4
{
unsigned char temp;
ES = 0;
if(RI)
{
RI = 0;
temp = SBUF;
RxBuf[rxPoint] = temp;
if(rxPoint == 0)
{
if(RxBuf[0] != addrcode[0])
{
rxPoint = 0;
RX_TX = 0;
ES = 1;
return;
}
}
if(rxPoint == 1)
{
if(RxBuf[1] != 0x03)
{
rxPoint = 0;
RX_TX = 0;
ES = 1;
return;
}
}
if(rxPoint == 7)
{
delay(1);
rxPoint = 0;
RX_TX = 1; //转为发送状态
commFlag = 1;
}
++rxPoint;
}
else if(TI)
{
TI = 0;
if(txPoint == sendleng)
{ txPoint = 0;RX_TX = 0;}
else
{ ++txPoint; SBUF = TxBuf[txPoint];}
}
ES = 1;
}
void commun03(void)
{
unsigned char i,j,ii,k;
unsigned char *p;
unsigned int crc,length;
float a;
length = (RxBuf[4]*256 + RxBuf[5])*2; //获取数据发送长度
TxBuf[2] = length;
for(i=0;i<(length/2);i++)
{ if(i < 6)
{
a = testResult[i];
p = (unsigned char*)(&a);
}
else
{
a = 1;
p = (unsigned char*)(&a);
}
j = p[2];
p[2] = p[0];
p[0] = j;
j = p[3];
p[3] = p[1];
p[1] = j;
for(ii=0;ii<4;ii++)
TxBuf[txPoint++] = p[ii];
}
p = &TxBuf[0];
crc = CRC16(p,length+3); //计算发送数据CRC键值
k = (crc&0xff00) >>8;
TxBuf[3+length] = k;
k = crc & 0x0ff;
TxBuf[4+length] = k;
sendleng = 4+length;
}
void protocol(void)
{
unsigned int length0;//length0为发送数据起始地址，length为数据长度
unsigned int temp1, temp2;
unsigned char *p;
//delay(50);
RX_TX = 1; //发送状态
p = &RxBuf[0];
temp1 = CRC16(p, 6);
temp2 = RxBuf[6];
temp2 = (temp2 << 8) | RxBuf[7];
if(temp1 != temp2) //crc error
{
rxPoint = 0;
txPoint = 0;
RX_TX = 0;
TI = 0;
ES = 1;
return;
}
txPoint = 0;
TxBuf[txPoint++] = RxBuf[0]; //board address is 0
TxBuf[txPoint++] = RxBuf[1]; //RTN = CID
length0 = (RxBuf[2]*256 + RxBuf[3])*4; //获取数据起始地址
txPoint = 3; //数据长度
if(RxBuf[1] == 0x03)
{commun03();}
txPoint = 0;
rxPoint = 0;
TI = 0;
SBUF = TxBuf[0]; //begin to send data
ES = 1;
}
unsigned int CRC16(unsigned char *puchMsg, unsigned int usDataLen)
{
unsigned char uchCRCHi = 0xFF; // high byte of CRC initialized
unsigned char uchCRCLo = 0xFF; // low byte of CRC initialized
unsigned int k;
unsigned char uIndex; // will index into CRC lookup table
while (usDataLen--) // pass through message buffer
{
uIndex = uchCRCHi ^ *puchMsg++;// calculate the CRC
uchCRCHi = uchCRCLo ^ auchCRCHi [uIndex];
uchCRCLo = auchCRCLo [uIndex];
}
k = uchCRCHi;
return (k << 8 | uchCRCLo);
}
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