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209
m68hc11/commctrl.cpp
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209
m68hc11/commctrl.cpp
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#include <m68hc11/commctrl.hpp>
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#include <m68hc11/m68hc11.hpp>
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#include <m68hc11/fmtlines.hpp>
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void CommControl::portToString(CommControl::Port port,String &strPort)
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{
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if(port==CommControl::PortCOM1)strPort=String(STRING_COM1);
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else if(port==CommControl::PortCOM2)strPort=String(STRING_COM2);
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else if(port==CommControl::PortCOM3)strPort=String(STRING_COM3);
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else strPort=String(STRING_COM4);
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}
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CommControl::Port CommControl::stringToPort(const String &strPort)
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{
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if(strPort==String(STRING_COM1))return CommControl::PortCOM1;
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else if(strPort==String(STRING_COM2))return CommControl::PortCOM2;
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else if(strPort==String(STRING_COM3))return CommControl::PortCOM3;
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else return CommControl::PortCOM4;
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}
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bool CommControl::readFully(GlobalData<BYTE> &dataBytes)
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{
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CommStatus commStatus;
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DWORD bytesRead=0;
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DWORD byteCount;
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DWORD bytesToRead;
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if(!isOkay())return false;
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clearError(commStatus);
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byteCount=dataBytes.size();
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if(!byteCount&&!commStatus.bytesInReceiveQueue())return false;
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if(!byteCount){byteCount=commStatus.bytesInReceiveQueue();dataBytes.size(byteCount);}
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return readFully(&dataBytes[0],dataBytes.size());
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}
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bool CommControl::readFully(BYTE *pBuffer,DWORD byteCount)
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{
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CommStatus commStatus;
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DWORD bytesRead=0;
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DWORD bytesToRead;
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if(!isOkay())return false;
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clearError(commStatus);
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if(!byteCount||!pBuffer)return false;
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while(bytesRead<byteCount)
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{
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if(commStatus.bytesInReceiveQueue())
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{
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bytesToRead=bytesRead+commStatus.bytesInReceiveQueue()>byteCount?byteCount-bytesRead:commStatus.bytesInReceiveQueue();
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read(&pBuffer[bytesRead],bytesToRead);
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bytesRead+=bytesToRead;
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}
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if(bytesRead==byteCount)break;
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::Sleep(25);
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clearError(commStatus);
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}
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showBytes(pBuffer,byteCount);
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return true;
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}
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bool CommControl::hasData(void)
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{
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CommStatus commStatus;
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clearError(commStatus);
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return commStatus.bytesInReceiveQueue()?true:false;
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}
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bool CommControl::clearReceiveQueue(void)
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{
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GlobalData<BYTE> rcvBytes;
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CommStatus commStatus;
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if(!isOkay())return false;
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::Sleep(1000);
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clearError(commStatus);
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if(!commStatus.bytesInReceiveQueue())return true;
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::OutputDebugString(String(String("Clearing ")+String().fromInt(commStatus.bytesInReceiveQueue())+String(" bytes from receive queue.\n")).str());
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rcvBytes.size(commStatus.bytesInReceiveQueue());
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read(&rcvBytes[0],rcvBytes.size());
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showBytes(rcvBytes);
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return true;
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}
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bool CommControl::waitEvent(DWORD &eventMask,DWORD timeout)
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{
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BOOL result;
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DWORD lastError;
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eventMask=0;
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if(!isOkay())return false;
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mIOEvent.resetEvent();
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result=::WaitCommEvent((HANDLE)mCommDevice,&eventMask,&mOverlapped.getOverlapped());
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if(result)return true;
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lastError=::GetLastError();
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if(lastError!=ERROR_IO_PENDING)return false;
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mIOEvent.waitEvent(timeout);
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if(!mCommDevice.getOverlappedResult(mOverlapped,false))return false;
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return true;
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}
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DWORD CommControl::enumerateDevices(Block<Port> &deviceList)
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{
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deviceList.remove();
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if(isOkay())return 0;
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for(Port port=PortCOM1;port<=PortCOM4;((int&)port)++)
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{
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if(mCommDevice.open(mStrPorts[port]))
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{
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mCommDevice.close();
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deviceList.insert(&port);
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}
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}
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return deviceList.size();
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}
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DWORD CommControl::enumerateDevices(Block<String> &deviceList)
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{
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deviceList.remove();
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if(isOkay())return 0;
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for(Port port=PortCOM1;port<=PortCOM4;((int&)port)++)
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{
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if(mCommDevice.open(mStrPorts[port]))
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{
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mCommDevice.close();
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if(PortCOM1==port)deviceList.insert(&String("COM1"));
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else if(PortCOM2==port)deviceList.insert(&String("COM2"));
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else if(PortCOM3==port)deviceList.insert(&String("COM3"));
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else if(PortCOM4==port)deviceList.insert(&String("COM4"));
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}
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}
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return deviceList.size();
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}
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DWORD CommControl::read(void *pBuffer,int length,DWORD timeout)
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{
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BOOL result;
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DWORD lastError;
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if(!isOkay())return FALSE;
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mIOEvent.resetEvent();
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result=mCommDevice.read((BYTE*)pBuffer,length,mOverlapped);
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if(result)return TRUE;
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lastError=::GetLastError();
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if(lastError!=ERROR_IO_PENDING)return FALSE;
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mIOEvent.waitEvent(TimeOut);
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if(!mCommDevice.getOverlappedResult(mOverlapped,FALSE))return FALSE;
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return TRUE;
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}
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bool CommControl::isOkay(void)const
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{
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return mCommDevice.isOkay();
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}
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bool CommControl::clearError(CommStatus &commStatus)const
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{
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DWORD errorMask(0);
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bool returnCode(false);
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if(!isOkay())return returnCode;
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returnCode=::ClearCommError((HANDLE)mCommDevice,&errorMask,&commStatus.getCOMSTAT());
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showError(errorMask);
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return returnCode;
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}
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bool CommControl::clearError(void)const
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{
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DWORD errorMask(0);
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bool returnCode(false);
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if(!isOkay())return false;
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returnCode=::ClearCommError((HANDLE)mCommDevice,&errorMask,0);
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showError(errorMask);
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return returnCode;
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}
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void CommControl::showError(DWORD errorMask)const
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{
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if(errorMask&CE_BREAK)::OutputDebugString("The hardware detected a break condition.\n");
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if(errorMask&CE_DNS)::OutputDebugString("Windows 95 and Windows 98: A parallel device is not selected.\n");
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if(errorMask&CE_FRAME)::OutputDebugString("The hardware detected a framing error.\n");
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if(errorMask&CE_IOE)::OutputDebugString("An I/O error occurred during communications with the device.\n");
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if(errorMask&CE_MODE)::OutputDebugString("The requested mode is not supported, or the hFile parameter is invalid. If this value is specified, it is the only valid error.\n");
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if(errorMask&CE_OOP)::OutputDebugString("Windows 95 and Windows 98: A parallel device signaled that it is out of paper.\n");
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if(errorMask&CE_OVERRUN)::OutputDebugString("A character-buffer overrun has occurred. The next character is lost.\n");
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if(errorMask&CE_PTO)::OutputDebugString("Windows 95 and Windows 98: A time-out occurred on a parallel device.\n");
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if(errorMask&CE_RXOVER)::OutputDebugString("An input buffer overflow has occurred. There is either no room in the input buffer, or a character was received after the end-of-file (EOF) character.\n");
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if(errorMask&CE_RXPARITY)::OutputDebugString("The hardware detected a parity error.\n");
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if(errorMask&CE_TXFULL)::OutputDebugString("The application tried to transmit a character, but the output buffer was full.\n");
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}
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void CommControl::showBytes(BYTE *pBuffer,DWORD byteCount)
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{
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Block<String> strLines;
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::OutputDebugString("\n");
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FormatLines::hexasciiLines(strLines,pBuffer,byteCount);
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for(int index=0;index<strLines.size();index++)
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{
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::OutputDebugString(strLines[index].str());
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::OutputDebugString("\n");
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}
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}
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void CommControl::showBytes(GlobalData<BYTE> rcvBytes)
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{
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showBytes(&rcvBytes[0],rcvBytes.size());
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}
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