📄 单片机modbusrtu通信协议.txt
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case 4:
*tempData = DA_OUT5;
send_back = 1;
break;
case 5:
*tempData = DA_OUT6;
send_back = 1;
break;
case 6:
*tempData = DA_OUT7;
send_back = 1;
break;
case 7:
*tempData = DA_OUT8;
send_back = 1;
break;
case 8:
*tempData = yinhu_bit ;
send_back = 1;
break;
case 9:
*tempData = one_16 ;
send_back = 1;
break;
case 10:
*tempData = two_16 ;
send_back = 1;
break;
case 11:
*tempData = AD_IN1 ;
send_back = 1;
break;
case 12:
*tempData = AD_IN2 ;
send_back = 1;
break;
case 13:
*tempData = AD_IN3 ;
send_back = 1;
break;
case 14:
*tempData = AD_IN4 ;
send_back = 1;
break;
case 15:
*tempData = AD_IN5 ;
send_back = 1;
break;
case 16:
*tempData = AD_IN6 ;
send_back = 1;
break;
case 17:
*tempData = AD_IN7 ;
send_back = 1;
break;
case 18:
*tempData = AD_IN8 ;
send_back = 1;
break;
default:
*tempData = 0 ;
send_back = 1;
break;
}
return result;
}
//设置寄存器值 返回0表示成功
uint setRegisterVal(uint addr,uint tempData)
{
uint result = 0;
uint tempAddr;
tempAddr = addr & 0xfff;
switch(tempAddr & 0xff)
{
case 0:
DA_OUT1 = tempData;
send_back = 1;
break;
case 1:
DA_OUT2 = tempData;
send_back = 1;
break;
case 2:
DA_OUT3 = tempData;
send_back = 1;
break;
case 3:
DA_OUT4 = tempData;
send_back = 1;
break;
case 4:
DA_OUT5 = tempData;
send_back = 1;
break;
case 5:
DA_OUT6 = tempData;
send_back = 1;
break;
case 6:
DA_OUT7 = tempData;
send_back = 1;
break;
case 7:
DA_OUT8 = tempData;
send_back = 1;
break;
case 8:
yinhu_bit = tempData;
send_back = 1;
break;
case 9:
one_16 = tempData;
send_back = 1;
break;
case 10:
two_16 = tempData;
send_back = 1;
break;
default:
send_back = 1;
break;
}
return result;
}
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 */
unsigned long 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) ;
}
//开始发送
void beginSend(void)
{
sendPosi = 0;
if(sendCount > 1)
sendCount--;
ACC = sendBuf[0];
TB8 = P;
SBUF = sendBuf[0];
}
//读线圈状态
void readCoil(void)
{
uchar addr;
uchar tempAddr;
uchar byteCount;
uchar bitCount;
uchar position;
uchar i,k;
// uchar result;
uchar exit = 0;
uint tempData;
uint crcData;
//addr = (receBuf[2]<<8) + receBuf[3];
//tempAddr = addr & 0xfff;
addr = receBuf[3];
tempAddr = addr;
//bitCount = (receBuf[4]<<8) + receBuf[5]; //读取的位个数
bitCount = receBuf[5];
byteCount = bitCount / 8; //字节个数
if(bitCount%8 != 0)
byteCount++;
for(k=0;k<byteCount;k++)
{//字节位置
position = k + 3;
sendBuf[position] = 0;
for(i=0;i<8;i++)
{
getCoilVal(tempAddr,&tempData);
sendBuf[position] |= tempData << i;
tempAddr++;
if(tempAddr >= addr+bitCount)
{ //读完
exit = 1;
break;
}
}
if(exit == 1)
break;
}
sendBuf[0] = localAddr;
sendBuf[1] = 0x01;
sendBuf[2] = byteCount;
byteCount += 3;
crcData = crc16(sendBuf,byteCount);
sendBuf[byteCount] = crcData >> 8;
byteCount++;
sendBuf[byteCount] = crcData & 0xff;
sendCount = byteCount + 1;
if (send_back == 1)
{
send_back = 0;
beginSend();
}
}
//读寄存器
void readRegisters(void)
{
uchar addr;
uchar tempAddr;
uchar readCount;
uchar byteCount;
// uchar finsh; //1完成 0出错
// uint result;
uint crcData;
uint i;
uint tempData = 0;
//addr = (receBuf[2]<<8) + receBuf[3];
//tempAddr = addr & 0xfff;
addr = receBuf[3];
tempAddr = addr;
//readCount = (receBuf[4]<<8) + receBuf[5]; //要读的个数
readCount = receBuf[5];
byteCount = readCount * 2;
for(i=0;i<byteCount;i+=2,tempAddr++)
{
getRegisterVal(tempAddr,&tempData);
sendBuf[i+3] = tempData >> 8;
sendBuf[i+4] = tempData & 0xff;
}
sendBuf[0] = localAddr;
sendBuf[1] = 3;
sendBuf[2] = byteCount;
byteCount += 3;
crcData = crc16(sendBuf,byteCount);
sendBuf[byteCount] = crcData >> 8;
byteCount++;
sendBuf[byteCount] = crcData & 0xff;
sendCount = byteCount + 1;
if (send_back == 1)
{
send_back = 0;
beginSend();
}
}
//写1个寄存器
void presetSingleRegister(void)
{
uchar addr;
uchar tempAddr;
uint crcData;
uint tempData = 0;
//addr = (receBuf[2]<<8) + receBuf[3];
//tempAddr = addr & 0xfff;
addr = receBuf[3];
tempAddr = addr;
tempData = ( receBuf[4 ] << 8) + receBuf[5];
setRegisterVal( tempAddr, tempData );
sendBuf[0] = localAddr;
sendBuf[1] = 3;
sendBuf[2] = addr >> 8;
sendBuf[3] = addr & 0xff;
crcData = crc16(sendBuf,6);
sendBuf[4] = crcData >> 8;
sendBuf[5] = crcData & 0xff;
sendCount = 6;
if (send_back == 1)
{
send_back = 0;
beginSend();
}
}
//强制单个线圈
void forceSingleCoil(void)
{
uchar addr;
uchar tempAddr;
uint tempData;
uchar onOff;
uchar i;
//addr = (receBuf[2]<<8) + receBuf[3];
//tempAddr = addr & 0xfff;
addr = receBuf[3];
tempAddr = addr;
//onOff = (receBuf[4]<<8) + receBuf[5];
onOff = receBuf[4];
//if(onOff == 0xff00)
if(onOff == 0xff)
{ //设为ON
tempData = 1;
}
//else if(onOff == 0x0000)
else if(onOff == 0x00)
{ //设为OFF
tempData = 0;
}
setCoilVal(tempAddr,tempData);
for(i=0;i<receCount;i++)
{
sendBuf[i] = receBuf[i];
}
sendCount = receCount;
if (send_back == 1)
{
send_back = 0;
beginSend();
}
}
//设置多个寄存器
void presetMultipleRegisters(void)
{
uchar addr;
uchar tempAddr;
uchar byteCount;
uchar setCount;
// uchar finsh; //为1时完成 为0时出错
uchar i;
uint crcData;
uint tempData;
//addr = (receBuf[2]<<8) + receBuf[3];
//tempAddr = addr & 0xfff;
addr = receBuf[3];
tempAddr = addr & 0xff;
//setCount = (receBuf[4]<<8) + receBuf[5];
setCount = receBuf[5];
byteCount = receBuf[6];
for(i=0;i<setCount;i++,tempAddr++)
{
tempData = (receBuf[i*2+7]<<8) + receBuf[i*2+8];
setRegisterVal(tempAddr,tempData);
}
sendBuf[0] = localAddr;
sendBuf[1] = 16;
sendBuf[2] = addr >> 8;
sendBuf[3] = addr & 0xff;
sendBuf[4] = setCount >> 8;
sendBuf[5] = setCount & 0xff;
crcData = crc16(sendBuf,6);
sendBuf[6] = crcData >> 8;
sendBuf[7] = crcData & 0xff;
sendCount = 8;
if (send_back == 1)
{
send_back = 0;
beginSend();
}
}
/***********************************************************************************
* Function: RS485_ZHC;
*
* Description: RS485_ZHC程序;
*
* Input: none;
*
* Return: none;
*
* Note: none;
************************************************************************************/
void RS485_ZHC(void)
{
uint crcData;
uint tempData;
if(receCount > 4)
{
switch(receBuf[1])
{
case 1://读取线圈状态(读取点 16位以内)
case 3://读取保持寄存器(一个或多个)
case 5://强制单个线圈
case 6://设置单个寄存器
if(receCount >= 8)
{//接收完成一组数据
//应该关闭接收中断
add++;
if(receBuf[0]==localAddr )
{
crcData = crc16(receBuf,6);
if(crcData == receBuf[7]+(receBuf[6]<<8))
{//校验正确
if(receBuf[1] == 1)
{//读取线圈状态(读取点 16位以内)
readCoil();
}
else if(receBuf[1] == 3)
{//读取保持寄存器(一个或多个)
readRegisters();
}
else if(receBuf[1] == 5)
{//强制单个线圈
forceSingleCoil();
}
else if(receBuf[1] == 6)
{
presetSingleRegister();
}
}
}
receCount = 0;
}
break;
case 15://设置多个线圈
tempData = receBuf[6];
tempData += 9; //数据个数
if(receCount >= tempData)
{
if(receBuf[0]==localAddr)
{
crcData = crc16(receBuf,tempData-2);
if(crcData == (receBuf[tempData-2]<<8)+ receBuf[tempData-1])
{
//forceMultipleCoils();
}
}
receCount = 0;
}
break;
case 16://设置多个寄存器
tempData = (receBuf[4]<<8) + receBuf[5];
tempData = tempData * 2; //数据个数
tempData += 9;
if(receCount >= tempData)
{ add++;
if(receBuf[0]==localAddr )
{
crcData = crc16(receBuf,tempData-2);
if(crcData == (receBuf[tempData-2]<<8)+ receBuf[tempData-1])
{
presetMultipleRegisters();
}
}
receCount = 0;
}
break;
default:
receCount = 0;
break;
}
}
}
///////////////////////////////////////////
void Correspondence(void) interrupt 4
{
save_point=xdata_point;
if(TI)
{
TI = 0;
for(;sendPosi < sendCount;)
{
sendPosi++;
// ACC = sendBuf[sendPosi];
// TB8 = P; //加上校验位
SBUF = sendBuf[sendPosi];
while(TI == 0)
{_nop_();_nop_();}
TI = 0;
}
receCount = 0; //清接收地址偏移寄存器
checkoutError = 0;
}
else if(RI)
{
RI = 0;
// receTimeOut = 10; //通讯超时值
receBuf[receCount] = SBUF;
// ACC = receBuf[receCount];
// if(P != RB8)
// checkoutError = 2; //偶校验出错
if(receBuf[0]==localAddr )
{
receCount++; //接收地址偏移寄存器加1
receCount &= 0x1f; //最多一次只能接收48个字节
check = 1;
}
else
{
receCount = 0;
}
}
xdata_point = save_point;
}
////////////////////////////////////////
void start_adc(void)//启动AD转换
{
//channel是转换通道
switch (channel)
{
case 1:ADC_CONTR = 0X80;break; //启动通道1转换
case 2:ADC_CONTR = 0X81;break; //启动通道2转换
case 3:ADC_CONTR = 0X82;break; //启动通道3转换
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