📄 modbus.c
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#include "common.h"
#include "rtu.h"
// CRC 高位字节值表
unsigned char 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
} ;
//CRC低位字节值表
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,
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
};
//CRC16校验
//*puchMsg : 要进行CRC校验的消息
//usDataLen : 消息中字节数
unsigned int crc16(unsigned char *puchMsg, unsigned char usDataLen)
{
unsigned char uchCRCHi = 0xFF; // 高CRC字节初始化
unsigned char uchCRCLo = 0xFF; // 低CRC 字节初始化
unsigned uIndex ; // CRC循环中的索引
while (usDataLen--) // 传输消息缓冲区
{
uIndex = uchCRCHi ^ *puchMsg++ ; // 计算CRC
uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ;
uchCRCLo = auchCRCLo[uIndex] ;
}
return (uchCRCHi << 8 | uchCRCLo) ;
}
// 串行中断程序
void commIntProc() interrupt 4
{
if(TI)
{
TI = 0;
if(sendPosi < sendCount)
{
sendPosi++;
ACC = sendBuf[sendPosi];
TB8 = P; //加上校验位
SBUF = sendBuf[sendPosi];
}
else
{
// b485Send = 0; //发送完后将485置于接收状态
receCount = 0; //清接收地址偏移寄存器
checkoutError = 0;
}
}
else if(RI)
{
RI = 0;
receTimeOut = 20; //通讯超时值
receBuf[receCount] = SBUF;
ACC = receBuf[receCount];
if(P != RB8)
checkoutError = 2; //偶校验出错
receCount++; //接收地址偏移寄存器加1
receCount &= 0x0f; //最多一次只能接收16个字节
}
}
//定时器0 1ms 中断
void timer0IntProc() interrupt 1
{
TL0 = TIMER_LOW;
TH0 = TIMER_HIGHT;
// dwIntTick++;
bt1ms = 1;
c10ms++;
if(c10ms >= 10)
{
c10ms = 0; //10ms计时器清零
bt10ms = 1;
}
}
//定时处理
void timeProc(void)
{
b1ms = 0;
b10ms = 0;
ET0 = 0;
// dwTickCount = dwIntTick;
ET0 = 1;
if(bt1ms)
{
bt1ms = 0;
b1ms = 1;
if(receTimeOut>0)
{
receTimeOut--;
if(receTimeOut==0 && receCount>0) //判断通讯接收是否超时
{
// b485Send = 0; //将485置为接收状态
receCount = 0; //将接收地址偏移寄存器清零
checkoutError = 0;
}
}
}
if(bt10ms) //判断中断10ms标志位是否1
{
bt10ms = 0; //清中断10ms标志位
b10ms = 1;
}
}
//初始化
void UART_initProg(void)
{
TMOD = 0x51; //TC0为计数器,TC1为定时器
TH0 = TIMER_HIGHT;
TL0 = TIMER_LOW;
TR0 = 1; //定时器0启动计数
ET0 = 1; //定时器0开中断
TH1 = 0;
TL1 = 0;
TR1 = 0; //定时器1停止计数
ET1 = 1; //定时器1开中断
//PT1 = 1;
PX0 = 1; //外部中断0高优先级
T2CON = 0x30; //T2 用于波特率 9600
RCAP2H = 0xff; //9600BPS@11.0592/6T
RCAP2L = 0xb8;
TR2 = 1; //定时器2启动
//偶校验
SCON = 0xd0; //11位异步收发,允许串口接收,
PCON = 0;
ES = 1; //串口开中断
EA = 1; //CPU开中断
// b485Send = 0;
}
//开始发送
void beginSend(void)
{
// b485Send = 1; //设为发送
sendPosi = 0;
if(sendCount > 1) sendCount--;
ACC = sendBuf[0];
TB8 = P;
SBUF = sendBuf[0];
}
//取线圈状态 返回0表示成功
unsigned int getCoilVal(unsigned int addr,unsigned int *tempData)
{
unsigned int result = 0;
unsigned int tempAddr;
tempAddr = addr & 0xfff;
//只取低8位地址
switch(tempAddr & 0xff)
{
case 0: *tempData = system_staus;
break;
case 1: *tempData = Loop_state;
break;
case 2: *tempData = Loop_mode;
break;
case 3:
break;
case 4:
break;
case 5:
break;
case 6:
break;
case 7:
break;
case 8:
break;
case 9:
break;
case 10:
break;
case 11:
break;
case 12:
break;
case 13:
break;
case 14:
break;
case 15:
break;
case 16:
break;
default:
break;
}
return result;
}
//设定线圈状态 返回0表示成功
unsigned int setCoilVal(unsigned int addr,unsigned int tempData)
{
unsigned int result = 0;
unsigned int tempAddr;
unsigned char i;
tempAddr = addr & 0xfff;
switch(tempAddr & 0xff)
{
case 0: system_staus=(unsigned char)tempData;
Set_Relay(13,system_staus);
Preset(0); //软给定
if(system_staus) ShowLine(0,12,"运行");
else ShowLine(0,12,"停止");
break;
case 1: Loop_state=(unsigned char)tempData;
Output_control();
break;
case 2: Loop_mode=(unsigned char)tempData;
Output_control();
break;
case 3: if(tempData==1)
{
for(i=3;i<12;i++) Set_Relay(i,0); //报警继电器全部释放
Set_Relay(2,0); //封脉继电器释放
Set_Relay(12,0); //跳闸继电器释放
Alarm=0;
Show_Alarm_prompt();
BEEP=1;
}
break;
case 4:
break;
case 5:
break;
case 6:
break;
case 7:
break;
case 8:
break;
case 9:
break;
case 10:
break;
case 11:
break;
case 12:
break;
case 13:
break;
case 14:
break;
case 15:
break;
case 16:
break;
default:
break;
}
return result;
}
//取寄存器值 返回0表示成功
unsigned int getRegisterVal(unsigned int addr,unsigned int *tempData)
{
unsigned int result = 0;
unsigned int tempAddr;
tempAddr = addr & 0xfff;
switch(tempAddr & 0xff)
{
case 0: *tempData = Current_Current;
break;
case 1: *tempData = Current_Voltage;
break;
case 2: *tempData = (unsigned int)(Current_Support_Voltage/65536);
break;
case 3: *tempData = (unsigned int)(Current_Support_Voltage%65536);
break;
case 4: *tempData = dtj;
break;
case 5: *tempData = temperatuer_val[0];
break;
case 6: *tempData = temperatuer_val[1];
break;
case 7: *tempData = temperatuer_val[2];
break;
case 8: *tempData = temperatuer_val[3];
break;
case 9: *tempData = Alarm;
break;
case 10:*tempData = Current_Set_value;
break;
case 11:*tempData = Voltage_Set_value;
break;
case 12:*tempData =0;
break;
case 13:*tempData =0;
break;
case 14:*tempData =0;
break;
case 15:*tempData =0;
break;
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