108 lines
2.3 KiB
C++
108 lines
2.3 KiB
C++
// SerialPort.cpp
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#include "SerialPort.h"
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#include <fcntl.h>
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#include <unistd.h>
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#include <cerrno>
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#include <cstring>
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#include <iostream>
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SerialPort::SerialPort() : fd(-1) {}
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SerialPort::~SerialPort()
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{
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closePort();
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}
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speed_t SerialPort::getBaudrate(int baudrate)
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{
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switch (baudrate)
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{
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case 115200:
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return B115200;
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case 57600:
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return B57600;
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case 38400:
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return B38400;
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case 19200:
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return B19200;
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case 9600:
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return B9600;
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case 4800:
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return B4800;
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case 2400:
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return B2400;
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default:
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return B115200;
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}
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}
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bool SerialPort::openPort(const std::string &portName, int baudrate)
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{
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fd = open(portName.c_str(), O_RDWR | O_NOCTTY | O_NONBLOCK);
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if (fd < 0)
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{
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std::cerr << "打开串口失败: " << strerror(errno) << std::endl;
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return false;
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}
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if (tcgetattr(fd, &tty) != 0)
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{
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std::cerr << "tcgetattr 失败: " << strerror(errno) << std::endl;
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close(fd);
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fd = -1;
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return false;
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}
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cfsetospeed(&tty, getBaudrate(baudrate));
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cfsetispeed(&tty, getBaudrate(baudrate));
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tty.c_cflag = (tty.c_cflag & ~CSIZE) | CS8;
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tty.c_cflag |= (CLOCAL | CREAD);
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tty.c_cflag &= ~(PARENB | PARODD);
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tty.c_cflag &= ~CSTOPB;
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tty.c_cflag &= ~CRTSCTS;
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tty.c_iflag &= ~(IXON | IXOFF | IXANY);
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tty.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
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tty.c_oflag &= ~OPOST;
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tty.c_cc[VMIN] = 1;
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tty.c_cc[VTIME] = 0;
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if (tcsetattr(fd, TCSANOW, &tty) != 0)
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{
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std::cerr << "tcsetattr 失败: " << strerror(errno) << std::endl;
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close(fd);
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fd = -1;
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return false;
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}
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return true;
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}
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void SerialPort::closePort()
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{
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if (fd >= 0)
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{
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close(fd);
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fd = -1;
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}
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}
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bool SerialPort::writeData(const uint8_t *data, size_t size)
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{
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if (fd < 0)
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{
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std::cerr << "串口未打开" << std::endl;
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return false;
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}
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ssize_t written = write(fd, data, size);
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if (written < 0)
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{
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std::cerr << "写串口失败: " << strerror(errno) << std::endl;
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return false;
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}
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return written == (ssize_t)size;
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}
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