July 15th, 2010, 10:14 AM
Open Serial Port using C
I am using an AL5A Robotic arm. I would like to open the serial port using the C++ programming.
My group partner and I have tried to look for a command to open the serial port. But in vain. We can do it in Matlab where we define and use the command serial to open the serial port as:
S= serial('COM1', 'BaudRate', 115200);
A=[35 48 80 49 49 53 55 84 48 48 48 13];
Those are the ASCII codes we need to send to the Servo motors of the robotic arm.
I was wondering if there's a similar way of doing it in C++? If so, how? and what header files do we need? Please let me know.
July 15th, 2010, 10:35 AM
Re: Open Serial Port using C
Assuming you're talking about using COM port on Windows.
you can then use ReadFile/WriteFile to read/write to the com port.
HANDLE hCom = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE/* as needed */, 0 /*must be exclusive*/, NULL, OPEN_EXISTING /* has to be this value */, 0, NULL);
dcb.DCBlength = sizeof(DCB);
if ( GetCommState(hCom, &dcb) )
// Set as needed
dcb.BaudRate = CBR_57600;
dcb.ByteSize = 8;
dcb.Parity = NOPARITY;
dcb.StopBits = ONESTOPBIT;
Don't forget to close the handle or the com port might be locked from further use.
Error handling has been left out of the above example to keep it short.
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