win32 ver
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xinyang
170
others/src/serial/serial.cpp
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170
others/src/serial/serial.cpp
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#include <serial/serial.h>
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#include <options/options.h>
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#include <log.h>
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using namespace std;
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#include <iostream>
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Serial::Serial(UINT portNo, UINT baud, char parity, UINT databits, UINT stopsbits, DWORD dwCommEvents) :
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hComm(INVALID_HANDLE_VALUE),
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portNo(portNo),
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parity(parity),
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databits(databits),
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stopsbits(stopsbits),
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dwCommEvents(dwCommEvents){
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if (wait_uart) {
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LOGM("Waiting for serial COM%d", portNo);
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while (InitPort(portNo, baud, parity, databits, stopsbits, dwCommEvents) == false);
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LOGM("Port COM%d open success!", portNo);
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} else {
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if (InitPort(portNo, baud, parity, databits, stopsbits, dwCommEvents)) {
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LOGM("Port COM%d open success!", portNo);
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} else {
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LOGE("Port COM%d open fail!", portNo);
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}
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}
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}
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Serial::~Serial() {
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ClosePort();
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}
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void Serial::ErrorHandler() {
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if (wait_uart) {
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LOGE("Serial COM%d offline, waiting for serial COM%d", portNo, portNo);
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while (InitPort(portNo, baud, parity, databits, stopsbits, dwCommEvents) == false);
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LOGM("Port COM%d reopen success!", portNo);
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}
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}
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bool Serial::openPort(UINT portNo) {
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char szPort[50];
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sprintf_s(szPort, "COM%d", portNo);
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/** <20><><EFBFBD><EFBFBD>ָ<EFBFBD><D6B8><EFBFBD>Ĵ<EFBFBD><C4B4><EFBFBD> */
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hComm = CreateFileA(szPort, /** <20>豸<EFBFBD><E8B1B8>,COM1,COM2<4D><32> */
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GENERIC_READ | GENERIC_WRITE, /** <20><><EFBFBD><EFBFBD>ģʽ,<2C><>ͬʱ<CDAC><CAB1>д */
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0, /** <20><><EFBFBD><EFBFBD>ģʽ,0<><30>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
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NULL, /** <20><>ȫ<EFBFBD><C8AB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>,һ<><D2BB>ʹ<EFBFBD><CAB9>NULL */
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OPEN_EXISTING, /** <20>ò<EFBFBD><C3B2><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD>豸<EFBFBD><E8B1B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>,<2C><><EFBFBD><EFBFBD>ʧ<EFBFBD><CAA7> */
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0,
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0);
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return hComm != INVALID_HANDLE_VALUE;
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}
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void Serial::ClosePort() {
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/** <20><><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><D0B4>ڱ<EFBFBD><DAB1><EFBFBD><F2BFAAA3>ر<EFBFBD><D8B1><EFBFBD> */
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if (hComm != INVALID_HANDLE_VALUE) {
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CloseHandle(hComm);
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hComm = INVALID_HANDLE_VALUE;
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}
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}
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bool Serial::InitPort(UINT portNo, UINT baud, char parity, UINT databits, UINT stopsbits, DWORD dwCommEvents) {
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/** <20><>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>,<2C><><EFBFBD>ƶ<EFBFBD><C6B6><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><D7AA>Ϊ<EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD>ʽ,<2C>Թ<EFBFBD><D4B9><EFBFBD>DCB<43>ṹ */
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char szDCBparam[50];
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sprintf_s(szDCBparam, "baud=%d parity=%c data=%d stop=%d", baud, parity, databits, stopsbits);
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if (!openPort(portNo)){
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cout << "open error!" << endl;
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return false;
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}
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BOOL bIsSuccess = TRUE;
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COMMTIMEOUTS CommTimeouts;
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CommTimeouts.ReadIntervalTimeout = 0;
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CommTimeouts.ReadTotalTimeoutMultiplier = 0;
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CommTimeouts.ReadTotalTimeoutConstant = 0;
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CommTimeouts.WriteTotalTimeoutMultiplier = 0;
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CommTimeouts.WriteTotalTimeoutConstant = 0;
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if (bIsSuccess) {
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bIsSuccess = SetCommTimeouts(hComm, &CommTimeouts);
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} else {
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cout << "SetCommTimeouts error!" << endl;
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}
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DCB dcb;
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if (bIsSuccess) {
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/** <20><>ȡ<EFBFBD><C8A1>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ò<EFBFBD><C3B2><EFBFBD>,<2C><><EFBFBD>ҹ<EFBFBD><D2B9>촮<EFBFBD><ECB4AE>DCB<43><42><EFBFBD><EFBFBD> */
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bIsSuccess = GetCommState(hComm, &dcb);
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bIsSuccess = BuildCommDCB(szDCBparam, &dcb);
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if (!bIsSuccess) {
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cout << "Create dcb fail with "<< GetLastError() << endl;
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}
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/** <20><><EFBFBD><EFBFBD>RTS flow<6F><77><EFBFBD><EFBFBD> */
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dcb.fRtsControl = RTS_CONTROL_ENABLE;
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}
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if (bIsSuccess) {
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/** ʹ<><CAB9>DCB<43><42><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><C3B4><EFBFBD>״̬ */
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bIsSuccess = SetCommState(hComm, &dcb);
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if (!bIsSuccess) {
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cout << "SetCommState error!" << endl;
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}
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}
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/** <20><><EFBFBD>մ<EFBFBD><D5B4>ڻ<EFBFBD><DABB><EFBFBD><EFBFBD><EFBFBD> */
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PurgeComm(hComm, PURGE_RXCLEAR | PURGE_TXCLEAR | PURGE_RXABORT | PURGE_TXABORT);
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return bIsSuccess;
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}
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UINT Serial::GetBytesInCOM() const {
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DWORD dwError = 0; /** <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
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COMSTAT comstat; /** COMSTAT<41>ṹ<EFBFBD><E1B9B9>,<2C><>¼ͨ<C2BC><CDA8><EFBFBD>豸<EFBFBD><E8B1B8>״̬<D7B4><CCAC>Ϣ */
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memset(&comstat, 0, sizeof(COMSTAT));
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UINT BytesInQue = 0;
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/** <20>ڵ<EFBFBD><DAB5><EFBFBD>ReadFile<6C><65>WriteFile֮ǰ,ͨ<><CDA8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD><EFBFBD>־ */
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if (ClearCommError(hComm, &dwError, &comstat)) {
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BytesInQue = comstat.cbInQue; /** <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD>뻺<EFBFBD><EBBBBA><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD><D0B5>ֽ<EFBFBD><D6BD><EFBFBD> */
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}
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return BytesInQue;
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}
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bool Serial::WriteData(const unsigned char* pData, unsigned int length) {
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if (hComm == INVALID_HANDLE_VALUE) {
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ErrorHandler();
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return false;
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}
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/** <20><EFBFBD><F2BBBAB3><EFBFBD>д<EFBFBD><D0B4>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> */
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BOOL bResult = TRUE;
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DWORD BytesToSend = 0;
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bResult = WriteFile(hComm, pData, length, &BytesToSend, NULL);
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if (!bResult) {
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DWORD dwError = GetLastError();
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/** <20><><EFBFBD>մ<EFBFBD><D5B4>ڻ<EFBFBD><DABB><EFBFBD><EFBFBD><EFBFBD> */
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PurgeComm(hComm, PURGE_RXCLEAR | PURGE_RXABORT);
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ErrorHandler();
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return false;
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}
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return true;
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}
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bool Serial::ReadData(unsigned char *buffer, unsigned int length) {
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if (hComm == INVALID_HANDLE_VALUE) {
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ErrorHandler();
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return false;
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}
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/** <20>ӻ<EFBFBD><D3BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡlength<74>ֽڵ<D6BD><DAB5><EFBFBD><EFBFBD><EFBFBD> */
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BOOL bResult = TRUE;
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DWORD totalRead = 0, onceRead = 0;
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while (totalRead < length) {
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bResult = ReadFile(hComm, buffer, length-totalRead, &onceRead, NULL);
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totalRead += onceRead;
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if ((!bResult)) {
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/** <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>,<2C><><EFBFBD>Ը<EFBFBD><D4B8>ݸô<DDB8><C3B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><D4AD> */
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DWORD dwError = GetLastError();
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/** <20><><EFBFBD>մ<EFBFBD><D5B4>ڻ<EFBFBD><DABB><EFBFBD><EFBFBD><EFBFBD> */
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PurgeComm(hComm, PURGE_RXCLEAR | PURGE_RXABORT);
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ErrorHandler();
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return false;
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}
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}
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return bResult;
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}
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