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xinyang
325
others/src/serial/serial.cpp
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325
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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#ifdef Windows
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Serial::Serial(UINT baud, char parity, UINT databits, UINT stopsbits, DWORD dwCommEvents) :
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hComm(INVALID_HANDLE_VALUE),
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portNo(3),
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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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#else defined(Linux)
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#include <string.h>
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using namespace std;
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string get_uart_dev_name(){
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FILE* ls = popen("ls /dev/ttyUSB* --color=never", "r");
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char name[20] = {0};
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fscanf(ls, "%s", name);
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return name;
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}
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Serial::Serial(int nSpeed, char nEvent, int nBits, int nStop) :
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nSpeed(nSpeed), nEvent(nEvent), nBits(nBits), nStop(nStop){
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if(wait_uart){
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LOGM("Wait for serial be ready!");
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while(InitPort(nSpeed, nEvent, nBits, nStop) == false);
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LOGM("Port set successfully!");
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}else{
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if(InitPort(nSpeed, nEvent, nBits, nStop)){
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LOGM("Port set successfully!");
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}else{
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LOGE("Port set fail!");
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}
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}
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}
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Serial::~Serial() {
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close(fd);
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fd = -1;
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}
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bool Serial::InitPort(int nSpeed, char nEvent, int nBits, int nStop){
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string name = get_uart_dev_name();
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if(name == ""){
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return false;
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}
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if((fd=open(name.data(), O_RDWR)) < 0){
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return false;
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}
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if(set_opt(fd, nSpeed, nEvent, nBits, nStop) < 0){
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return false;
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}
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return true;
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}
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//int GetBytesInCOM() const {
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//
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//}
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bool Serial::WriteData(const unsigned char* pData, unsigned int length){
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int cnt=0, curr=0;
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while((curr=write(fd, pData+cnt, length-cnt))>0 && (cnt+=curr)<length);
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if(cnt < 0){
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LOGE("Serial offline!");
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close(fd);
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if(wait_uart){
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InitPort(nSpeed, nEvent, nBits, nStop);
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}
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}
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}
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bool Serial::ReadData(unsigned char* buffer, unsigned int length){
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int cnt=0, curr=0;
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while((curr=read(fd, buffer+cnt, length-cnt))>0 && (cnt+=curr)<length);
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if(cnt < 0){
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LOGE("Serial offline!");
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close(fd);
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if(wait_uart){
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InitPort(nSpeed, nEvent, nBits, nStop);
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}
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}
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}
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int Serial::set_opt(int fd, int nSpeed, char nEvent, int nBits, int nStop) {
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termios newtio{}, oldtio{};
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if (tcgetattr(fd, &oldtio) != 0) {
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perror("SetupSerial 1");
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return -1;
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}
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bzero(&newtio, sizeof(newtio));
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newtio.c_cflag |= CLOCAL | CREAD;
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newtio.c_cflag &= ~CSIZE;
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switch (nBits) {
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case 7:
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newtio.c_cflag |= CS7;break;
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case 8:
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newtio.c_cflag |= CS8;break;
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default:break;
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}
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switch (nEvent) {
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case 'O': //<2F><>У<EFBFBD><D0A3>
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newtio.c_cflag |= PARENB;
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newtio.c_cflag |= PARODD;
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newtio.c_iflag |= (INPCK | ISTRIP);
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break;
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case 'E': //żУ<C5BC><D0A3>
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newtio.c_iflag |= (INPCK | ISTRIP);
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newtio.c_cflag |= PARENB;
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newtio.c_cflag &= ~PARODD;
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break;
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case 'N': //<2F><>У<EFBFBD><D0A3>
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newtio.c_cflag &= ~PARENB;
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break;
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default:break;
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}
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switch (nSpeed) {
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case 2400:
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cfsetispeed(&newtio, B2400);
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cfsetospeed(&newtio, B2400);
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break;
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case 4800:
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cfsetispeed(&newtio, B4800);
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cfsetospeed(&newtio, B4800);
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break;
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case 9600:
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cfsetispeed(&newtio, B9600);
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cfsetospeed(&newtio, B9600);
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break;
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case 115200:
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cfsetispeed(&newtio, B115200);
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cfsetospeed(&newtio, B115200);
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break;
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default:
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cfsetispeed(&newtio, B9600);
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cfsetospeed(&newtio, B9600);
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break;
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}
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if (nStop == 1) {
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newtio.c_cflag &= ~CSTOPB;
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} else if (nStop == 2) {
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newtio.c_cflag |= CSTOPB;
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}
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newtio.c_cc[VTIME] = 0;
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newtio.c_cc[VMIN] = 0;
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tcflush(fd, TCIFLUSH);
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if ((tcsetattr(fd, TCSANOW, &newtio)) != 0) {
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perror("com set error");
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return -1;
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}
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printf("set done!\n");
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return 0;
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}
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#endif /* switch os */
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