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\r\n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