void decodeIt(void)
{
if(received[0] == SlaveAddress){
if(checkCRC()){
if(received[1] == 0x01){
readCoil();
}
else if(received[1] == 0x02){
readInputCoil();
}
else if(received[1] == 0x03){
readReg();
}
else if(received[1] == 0x04){
readInputReg();
}
else if(received[1] == 0x05){
writeCoil();
}
else if(received[1] == 0x06){
writeReg();
}
else if(received[1] == 0x10){
writeMultipleRegs();
}
else if(received[1] == 0x0F){
writeMultipleCoils();
}
else{
response[0] = 0; //error this does nothing though..
}
}
}
modbusMessage = 0;
}
//检查uart0数据
void checkComm0Modbus(void)
{
uint16 crcData;
uint16 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
if(receBuf[0]==localAddr && checkoutError==0)
{
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;
checkoutError = 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 && checkoutError==0)
{
crcData = crc16(receBuf,tempData-2);
if(crcData == (receBuf[tempData-2]<<8)+ receBuf[tempData-1])
{
//forceMultipleCoils();
}
}
receCount = 0;
checkoutError = 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)
{
if(receBuf[0]==localAddr && checkoutError==0)
{
crcData = crc16(receBuf,tempData-2);
if(crcData == (receBuf[tempData-2]<<8)+ receBuf[tempData-1])
{
presetMultipleRegisters();
}
}
receCount = 0;
checkoutError = 0;
}
break;
default:
break;
}
}
}//void checkComm0(void)