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100 lines
2.7 KiB
100 lines
2.7 KiB
#include "uart.hpp"
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <iostream>
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using namespace iflytop;
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using namespace std;
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static map<string, uint32_t> s_baudratemap = {
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{"0", B0}, {"50", B50}, {"75", B75}, {"110", B110}, //
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{"134", B134}, {"150", B150}, {"200", B200}, {"300", B300}, //
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{"600", B600}, {"1200", B1200}, {"1800", B1800}, {"2400", B2400}, //
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{"4800", B4800}, {"9600", B9600}, {"19200", B19200}, {"38400", B38400}, //
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{"57600", B57600}, {"115200", B115200}, {"230400", B230400}, {"460800", B460800}, //
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{"500000", B500000}, {"576000", B576000}, {"921600", B921600}, {"1000000", B1000000}, //
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{"1152000", B1152000}, {"1500000", B1500000}, {"2000000", B2000000}, {"2500000", B2500000}, //
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{"3000000", B3000000}, {"3500000", B3500000}, {"4000000", B4000000},
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};
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Uart::Uart() {}
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Uart::~Uart() {}
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int Uart::open(string path, string ratestr) {
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int rc;
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m_name = path;
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m_fd = ::open(path.c_str(), O_RDWR | O_NOCTTY);
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if (m_fd < 0) {
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cout << "open " << path << " failed" << endl;
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return -1;
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}
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if (s_baudratemap.find(ratestr) == s_baudratemap.end()) {
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return -2;
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}
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m_rate = ratestr;
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memset(&m_tty, 0, sizeof(m_tty));
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m_tty.c_cflag |= CLOCAL | CREAD; // 激活本地连接与接受使能
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m_tty.c_cflag &= ~CSIZE; // 失能数据位屏蔽
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m_tty.c_cflag |= CS8; // 8位数据位
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m_tty.c_cflag &= ~CSTOPB; // 1位停止位
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m_tty.c_cflag &= ~PARENB; // 无校验位
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m_tty.c_cc[VTIME] = 0;
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m_tty.c_cc[VMIN] = 0;
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cfsetispeed(&m_tty, s_baudratemap[ratestr]); // 设置输入波特率
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cfsetospeed(&m_tty, s_baudratemap[ratestr]); // 设置输出波特率
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tcflush(m_fd, TCIFLUSH); // 刷清未处理的输入和/或输出
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/* Apply attributes */
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rc = tcsetattr(m_fd, TCSANOW, &m_tty);
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if (rc) {
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cout << "tcsetattr failed" << endl;
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return -3;
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}
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return 0;
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}
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int Uart::send(char *data, int size) {
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int sent = 0;
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sent = write(m_fd, data, size);
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if (sent > 0) {
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printf("send success, data is %s\r\n", data);
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}
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return sent;
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}
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int Uart::receive(char *data, int size_max) {
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int received = 0;
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received = read(m_fd, data, size_max);
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if (received > 0) {
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printf("recv success,recv size is %d,data is %s\r\n", received, data);
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}
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return received;
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}
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int Uart::close() {
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::close(m_fd);
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m_fd = -1;
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return 0;
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}
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bool Uart::flush_rx() {
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if (m_fd < 0) return false;
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int rc = tcflush(m_fd, TCIFLUSH);
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return rc == 0;
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}
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bool Uart::flush_tx() {
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if (m_fd < 0) return false;
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int rc = tcflush(m_fd, TCOFLUSH);
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return rc == 0;
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}
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