83 lines
1.8 KiB
C++
83 lines
1.8 KiB
C++
#ifndef CSERIALPORT_SERIALPORT_H
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#define CSERIALPORT_SERIALPORT_H
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#include <cstdint>
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#include <cstring>
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namespace itas109 {
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enum class Parity {
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ParityNone = 0,
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ParityOdd = 1,
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ParityEven = 2,
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};
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enum class DataBits {
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DataBits5 = 5,
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DataBits6 = 6,
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DataBits7 = 7,
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DataBits8 = 8,
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};
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enum class StopBits {
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StopOne = 1,
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StopOneAndHalf = 3,
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StopTwo = 2,
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};
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enum class FlowControl {
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FlowNone = 0,
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FlowHardware = 1,
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FlowSoftware = 2,
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};
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class CSerialPort {
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public:
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CSerialPort();
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~CSerialPort();
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// 初始化串口参数（不打开）
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void init(const char* portName,
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int baudRate = 115200,
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Parity parity = Parity::ParityNone,
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DataBits dataBits = DataBits::DataBits8,
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StopBits stopBits = StopBits::StopOne,
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FlowControl flowControl = FlowControl::FlowNone,
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int readTimeoutMs = 1000);
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// 打开串口，成功返回 true
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bool open();
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// 关闭串口
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void close();
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// 写数据，返回实际写入字节数（失败返回 -1）
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int writeData(const uint8_t* data, size_t length);
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// 读数据，返回实际读取字节数（失败返回 -1）
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int readData(uint8_t* buffer, size_t maxLength);
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// 返回最近一次错误码
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int getLastError() const { return m_lastError; }
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private:
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char m_portName[256];
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int m_baudRate;
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Parity m_parity;
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DataBits m_dataBits;
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StopBits m_stopBits;
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FlowControl m_flowControl;
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int m_readTimeoutMs;
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int m_fd; // 文件描述符
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int m_lastError;
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bool m_isOpen;
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// termios 波特率映射
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static int toBaudRate(int baud);
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};
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} // namespace itas109
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#endif // CSERIALPORT_SERIALPORT_H
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