pcommlite串口通讯库使用

MFC下串口编程使用最多的两种方法是读取注册表和使用mscomm组件,都有着或多或少的缺陷,调用系统SDK比较麻烦,而MSCOMm组件最多支持16个串口,串口号大于16的时候无法打开,遇到这种情况,可以使用一个名为pcommlite的串口通讯库,下载安装之后,解压出来的文件包括

 

 

根据编译的平台选择相应的lib文件加入工程,并加入pcomm.h文件

1. 寻找系统串口,sio_open()打开串口 sio_close()关闭串口
2.     BYTE i = 0;
3.     CString str;
4.     // TODO: 在此添加控件通知处理程序代码
5.     ((CComboBox *)this->GetDlgItem(IDC_COMBO_Serial_Num_Select))->ResetContent();
6.     for (i = 0;i < 255;i++)
7.     {//此程序支持255个串口
8.         if(SIO_OK == sio_open(i))
9.         {
10. sio_close(i);
11. str.AppendFormat("COM%d",i);
12. ((CComboBox *)GetDlgItem(IDC_COMBO_Serial_Num_Select))->AddString(str);
13. str.Empty();
14. }
15. }
16. i = ((CComboBox *)GetDlgItem(IDC_COMBO_Serial_Num_Select))->GetCount();
17. if(i ==0)
18. {
19. GetDlgItem(IDC_BUTTON_SERIAL_CONTROL)->EnableWindow(FALSE);
20. }
21. else
22. {
23. GetDlgItem(IDC_BUTTON_SERIAL_CONTROL)->EnableWindow(TRUE);
24. }

2.打开串口,各种库宏定义

    switch(comBaud)

        {

        case 0:

            m_comBaud = B1200;

            break;

        case 1:

            m_comBaud = B2400;

            break;

        case 2:

            m_comBaud = B4800;

            break;

        case 3:

            m_comBaud = B9600;

            break;

        case 4:

            m_comBaud = B19200;

            break;

        case 5:

            m_comBaud = B38400;

            break;

        case 6:

            m_comBaud = B57600;

            break;

        case 7:

            m_comBaud = B115200;

            break;

        case 8:

            m_comBaud = B230400;

            break;

        }

        switch(comStopBit)

        {

        case 0:

            m_comStopBit = STOP_1;

            break;

        case 1:

            m_comStopBit = STOP_2;

            break;

        }

        switch (comDataLength)

        {

        case 0:

            m_comDataLength = BIT_5;

            break;

        case 1:

            m_comDataLength = BIT_6;

            break;

        case 2:

            m_comDataLength = BIT_7;

            break;

        case 3:

            m_comDataLength = BIT_8;

            break;

        }

        switch(comCheckSum)

        {

        case 0:

            m_comChecksum = P_NONE;

            break;

        case 1:

            m_comChecksum = P_ODD;

            break;

        case 2:

            m_comChecksum = P_EVEN;

            break;

        }

        config = m_comDataLength|m_comStopBit|m_comChecksum;

        //开始串口配置

        if( sio_open(m_comPort) != SIO_OK)

        {

            MessageBox("串口打开失败","提示",MB_OK);

            this->serialsIsOpen = false;

            m_comPort = 0;

            return;

        }

        sio_flowctrl(m_comPort,0x00);//关闭硬件流控制

        sio_lctrl(m_comPort,0x00);//关闭RTS DTR

        sio_ioctl(m_comPort,m_comBaud,config);

        sio_flush(m_comPort,2);

        this->GetDlgItem(IDC_BUTTON_SERIAL_CONTROL)->SetWindowText("关闭串口");

        GetDlgItem(IDC_COMBO_Serial_Num_Select)->EnableWindow(FALSE);

        GetDlgItem(IDC_COMBO_Serial_Baud_Select)->EnableWindow(FALSE);

        GetDlgItem(IDC_COMBO_Serial_Data_Select)->EnableWindow(FALSE);

        GetDlgItem(IDC_COMBO_Serial_Parity_Select)->EnableWindow(FALSE);

        GetDlgItem(IDC_COMBO_Serial_Stop_Select)->EnableWindow(FALSE);

        this->serialsIsOpen = true;

    }

3.串口发送数据 sio_lstatus() sio_write()

//检查串口是否打开,打开就发送

    if(serialsIsOpen == true)

    {

        //变量打开了,要去测试串口状态

        if(sio_lstatus(m_comPort)>= 0)

        {

            CString str1;

            sendString.Empty();

            //没有对 特殊处理

            ((CEdit*)GetDlgItem(IDC_EDIT3))->GetWindowText(str1);

            sendString.AppendFormat("%s",str1);

            sio_write(m_comPort,sendString.GetBuffer(),sendString.GetLength());

        }

        else

        {

            //说明串口已经丢失

            MessageBox("串口丢失,请关闭后重新打开","错误",MB_OK);

        }

    }

    else

    {

        //说明串口已经丢失

        MessageBox("请先打开串口","错误",MB_OK);

    }

4.设定定时器,用于串口接收数据

 

5.在定时器中接收数据 sio_read()

 

void CLPC1768_PAD_OTG_DebugDlg::SerialsProcessBuffer( void )

{

    serialReadTemp.Empty();

    if(m_comPort > 0 && this->serialsIsOpen == true)

    {

        char readBuffer[1024] = {0};

        //      sio_flush(m_comPort,1);

        int length = sio_read(m_comPort,readBuffer,1024);

        if(length > 0)

        {

            for(int i = 0; i < length; i++)

            {

                serialReadTemp.AppendChar(readBuffer[i]);

            }

        }

    }

}

该库还有很多借口用于控制DTR RTS等,使用方便,详情查看帮助文档