📄 rtu984.c
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#include "config.h"
WORD Coil[COIL_MAX_INDEX / 16];
WORD Input[INPUT_MAX_INDEX / 16];
WORD HoldingReg[HOLDINGREG_MAX_INDEX];
WORD InputReg[INPUTREG_MAX_INDEX];
// Table of CRC values for high-order byte
static BYTE 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 byte
static BYTE 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
};
WORD CRC16(BYTE *buff, WORD len)
{
BYTE uchCRCHi = 0xFF ; // high byte of CRC initialized
BYTE uchCRCLo = 0xFF ; // low byte of CRC initialized
BYTE uIndex ; // will index into CRC lookup table
while (len--) // pass through message buffer
{
uIndex = uchCRCHi ^ *buff++ ; // calculate the CRC
uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ;
uchCRCLo = auchCRCLo[uIndex] ;
}
return ((uchCRCHi << 8) | uchCRCLo) ;
}//WORD CRC16(unsigned char *buff, unsigned short len)
void Uart_FillRTU(void)
{
WORD crc;
Uart_ucSendBuff[0] = Uart_ucAddr;
Uart_ucSendBuff[1] = Uart_ucReceBuff[1];
crc = CRC16(Uart_ucSendBuff,Uart_ucSendLen);
Uart_ucSendBuff[Uart_ucSendLen++] = (crc >> 8) & 0xff;
Uart_ucSendBuff[Uart_ucSendLen++] = crc & 0xff;
}//void Uart_FillRTU(void)
void ReadCoilStat(void)
{
int addr,len,i;
WORD temp;
addr = (Uart_ucReceBuff[2] << 8) | Uart_ucReceBuff[3];
len = (Uart_ucReceBuff[4] << 8) | Uart_ucReceBuff[5];
if(len >= 1 && len < UART_BUFF_LEN / 2)
{
Uart_ucSendBuff[2] = (len - 1) / 8 + 1;
for(i = 0; i < len; i++)
{
if(addr < COIL_MAX_INDEX)
{
temp = Coil[(addr + i) / 16] & (1 << ((addr + i) % 16));
if(temp) Uart_ucSendBuff[3 + i / 8] |= (1 << (i % 8));
else Uart_ucSendBuff[3 + i / 8] &= ~(1 << (i % 8));
}
}
}
else
{
Uart_ucSendBuff[2] = 1;
}
Uart_ucSendLen = 3 + Uart_ucSendBuff[2];
Uart_FillRTU();
}//void ReadCoilStat(void)
void ReadInputStat(void)
{
int addr,len,i;
WORD temp;
addr = (Uart_ucReceBuff[2] << 8) | Uart_ucReceBuff[3];
len = (Uart_ucReceBuff[4] << 8) | Uart_ucReceBuff[5];
if(len >= 1 && len < UART_BUFF_LEN / 2)
{
Uart_ucSendBuff[2] = (len - 1) / 8 + 1;
for(i = 0; i < len; i++)
{
if(addr < INPUT_MAX_INDEX)
{
temp = Input[(addr + i) / 16] & (1 << ((addr + i) % 16));
if(temp) Uart_ucSendBuff[3 + i / 8] |= (1 << (i % 8));
else Uart_ucSendBuff[3 + i / 8] &= ~(1 << (i % 8));
}
}
}
else
{
Uart_ucSendBuff[2] = 1;
}
Uart_ucSendLen = 3 + Uart_ucSendBuff[2];
Uart_FillRTU();
}//void ReadInputStat(void)
void ReadHoldingReg(void)
{
int addr,len,i;
addr = (Uart_ucReceBuff[2] << 8) | Uart_ucReceBuff[3];
len = (Uart_ucReceBuff[4] << 8) | Uart_ucReceBuff[5];
if(len >= 1 && len < UART_BUFF_LEN / 4)
{
Uart_ucSendBuff[2] = len * 2;
for(i = 0; i < len; i++)
{
if(addr < HOLDINGREG_MAX_INDEX)
{
Uart_ucSendBuff[3 + i * 2] = (HoldingReg[addr + i] >> 8) & 0xff;
Uart_ucSendBuff[4 + i * 2] = HoldingReg[addr + i] & 0xff;
}
}
}
else
{
Uart_ucSendBuff[2] = 2;
}
Uart_ucSendLen = 3 + Uart_ucSendBuff[2];
Uart_FillRTU();
}//void ReadHoldingReg(void)
void ReadInputReg(void)
{
int addr,len,i;
addr = (Uart_ucReceBuff[2] << 8) | Uart_ucReceBuff[3];
len = (Uart_ucReceBuff[4] << 8) | Uart_ucReceBuff[5];
if(len >= 1 && len < UART_BUFF_LEN / 4)
{
Uart_ucSendBuff[2] = len * 2;
for(i = 0; i < len; i++)
{
if(addr < INPUTREG_MAX_INDEX)
{
Uart_ucSendBuff[3 + i * 2] = (InputReg[addr + i] >> 8) & 0xff;
Uart_ucSendBuff[4 + i * 2] = InputReg[addr + i] & 0xff;
}
}
}
else
{
Uart_ucSendBuff[2] = 2;
}
Uart_ucSendLen = 3 + Uart_ucSendBuff[2];
Uart_FillRTU();
}//void ReadInputReg(void)
void ForceSingleCoil(void)
{
int addr,data;
addr = (Uart_ucReceBuff[2] << 8) | Uart_ucReceBuff[3];
data = (Uart_ucReceBuff[4] << 8) | Uart_ucReceBuff[5];
if(addr < COIL_MAX_INDEX)
{
if(data == 0xff00) Coil[addr /16] |= (1 << (addr % 16));
else if(data == 0x0000) Coil[addr /16] &= ~(1 << (addr % 16));
}
Uart_ucSendBuff[2] = Uart_ucReceBuff[2];
Uart_ucSendBuff[3] = Uart_ucReceBuff[3];
Uart_ucSendBuff[4] = Uart_ucReceBuff[4];
Uart_ucSendBuff[5] = Uart_ucReceBuff[5];
Uart_ucSendLen = 6;
Uart_FillRTU();
}//void ForceSingleCoil(void)
void ForceSingleReg(void)
{
int addr,data;
addr = (Uart_ucReceBuff[2] << 8) | Uart_ucReceBuff[3];
data = (Uart_ucReceBuff[4] << 8) | Uart_ucReceBuff[5];
if(addr < HOLDINGREG_MAX_INDEX) HoldingReg[addr] = data;
Uart_ucSendBuff[2] = Uart_ucReceBuff[2];
Uart_ucSendBuff[3] = Uart_ucReceBuff[3];
Uart_ucSendBuff[4] = Uart_ucReceBuff[4];
Uart_ucSendBuff[5] = Uart_ucReceBuff[5];
Uart_ucSendLen = 6;
Uart_FillRTU();
}//void ForceSingleReg(void)
void ForceMulCoil(void)
{
int addr,len,i;
int temp;
addr = (Uart_ucReceBuff[2] << 8) | Uart_ucReceBuff[3];
len = (Uart_ucReceBuff[4] << 8) | Uart_ucReceBuff[5];
if((addr + len) < COIL_MAX_INDEX && len >= 1)
{
for(i = 0; i < len; i++)
{
temp = Uart_ucReceBuff[7 + i / 8] & (1 << (i % 8));
if(temp) Coil[(addr + i) / 16] |= (1 << ((addr + i) % 16));
else Coil[(addr + i) / 16] &= ~(1 << ((addr + i) % 16));
}
}
Uart_ucSendBuff[2] = Uart_ucReceBuff[2];
Uart_ucSendBuff[3] = Uart_ucReceBuff[3];
Uart_ucSendBuff[4] = Uart_ucReceBuff[4];
Uart_ucSendBuff[5] = Uart_ucReceBuff[5];
Uart_ucSendLen = 6;
Uart_FillRTU();
}//void ForceMulCoil(void)
void ForceMulReg(void)
{
int addr,len,i;
int temp;
addr = (Uart_ucReceBuff[2] << 8) | Uart_ucReceBuff[3];
len = (Uart_ucReceBuff[4] << 8) | Uart_ucReceBuff[5];
if((addr + len) < HOLDINGREG_MAX_INDEX && len >= 1)
{
for(i = 0; i < len; i++)
{
temp = (Uart_ucReceBuff[7 + i * 2] << 8) | Uart_ucReceBuff[8 + i * 2];
HoldingReg[addr + i] = temp;
}
}
Uart_ucSendBuff[2] = Uart_ucReceBuff[2];
Uart_ucSendBuff[3] = Uart_ucReceBuff[3];
Uart_ucSendBuff[4] = Uart_ucReceBuff[4];
Uart_ucSendBuff[5] = Uart_ucReceBuff[5];
Uart_ucSendLen = 6;
Uart_FillRTU();
}//void ForceMulReg(void)
void RTU984(void)
{
WORD crc1,crc2;
crc1 = CRC16(Uart_ucReceBuff,Uart_ucReceLen - 2);
crc2 = (Uart_ucReceBuff[Uart_ucReceLen - 2] << 8) | Uart_ucReceBuff[Uart_ucReceLen - 1];
if(crc1 == crc2)
{
switch(Uart_ucReceBuff[1])
{
case 0x01: ReadCoilStat();
break;
case 0x02: ReadInputStat();
break;
case 0x03: ReadHoldingReg();
break;
case 0x04: ReadInputReg();
break;
case 0x05: ForceSingleCoil();
break;
case 0x06: ForceSingleReg();
break;
case 0x0f: ForceMulCoil();
break;
case 0x10: ForceMulReg();
break;
default: break;
}
}
}//void RTU984(void)
void Uart0_RTU984(void)
{
WORD i;
if(Uart0_ucReceBuff[0] == Uart_ucAddr)
{
if(Uart0_udTimeOut > 0)
{
if(udTickCount >= Uart0_udTimeOut)
{
ucUartFlag = 0;
Uart_ucReceLen = Uart0_ucReceLen;
for(i = 0; i < Uart0_ucReceLen; i++) Uart_ucReceBuff[i] = Uart0_ucReceBuff[i];
Uart_ucSendLen = 0;
RTU984();
if(Uart_ucSendLen > 0)
{
Uart0_ucSendLen = Uart_ucSendLen;
for(i = 0; i < Uart_ucSendLen; i++) Uart0_ucSendBuff[i] = Uart_ucSendBuff[i];
Uart0_ucSendPosi = 1;
U0THR = Uart0_ucSendBuff[0];
}
Uart0_ucReceLen = 0;
Uart0_udTimeOut = 0;
}
}
}
}//void Uart0_RTU984(void)
void Uart1_RTU984(void)
{
WORD i;
if(Uart1_ucReceBuff[0] == Uart_ucAddr)
{
if(Uart1_udTimeOut > 0)
{
if(udTickCount >= Uart1_udTimeOut)
{
ucUartFlag = 1;
Uart_ucReceLen = Uart1_ucReceLen;
for(i = 0; i < Uart1_ucReceLen; i++) Uart_ucReceBuff[i] = Uart1_ucReceBuff[i];
Uart_ucSendLen = 0;
RTU984();
if(Uart_ucSendLen > 0)
{
Uart1_ucSendLen = Uart_ucSendLen;
for(i = 0; i < Uart_ucSendLen; i++) Uart1_ucSendBuff[i] = Uart_ucSendBuff[i];
Uart1_ucSendPosi = 1;
U1THR = Uart1_ucSendBuff[0];
}
Uart1_ucReceLen = 0;
Uart1_udTimeOut = 0;
}
}
}
}//void Uart1_RTU984(void)
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