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[SOLVED] Managing String buffer [message #47470]

Fri, 20 January 2017 09:56

Giorgio
Messages: 218
Registered: August 2015

Experienced Member

Hi there,
as it seems that there is no way to use the boost library with u++, I digged into the forum and found a thread that helped me, but now I have a problem treating a buffer of the String class.

In this message http://www.ultimatepp.org/forums/index.php?t=msg&th=5401 &goto=27851&#msg_27851 there is a u++ project containing a working serial library. With some modifications it works with my device. My problem is when I read data from the device and try to print them on screen. The library has a method (ReadDataWaiting) that tells me how many characters the device sent out as response. Using that method I get 7, that is what I expect. Problems come when I try to actually read those data.

There is this method:

int SerialPort::ReadData( void *buffer, int limit )

that, as far as I understood, puts the read data in a buffer.

In the CommPak sources there is also this:

String buffer[1024]; // Rx buffer

...

CommPort.ReadData(buffer, sizeof(buffer));

So I wrote the following code:

if (x = commPort.ReadDataWaiting())
{
    commPort.ReadData(buffer, sizeof(buffer));
    std::cout << "buffer" << std::endl;
    std::cout << buffer << std::endl;
}

But the result on screen is "011C3DE8" while it should be a string like "TAV 45", so my problem now is just how to treat that buffer to get results in plain English.

This is a very important and urgent matter for me and any help is very appreciated.
Thanks,
Gio

[Updated on: Fri, 20 January 2017 15:08]

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