QByteArray sum element and Converting into integer

Nopa11

Hi, I'm new beginner in Qt. I'm using QbyteArray to read int 2 byte data from Serialport. I need to sum element
such as Serialport sent { 0xff, 0x0f } and QbyteArray data received { data[0] = 0xff , data[1] = 0x0f }
I need to data[1] brfore data[0] ( 0000 1111 , 1111 1111) --> to sum --> (0000 1111 + 1111 1111) = ( 0000 1111 1111 1111)
and converting to integer.

coding

QByteArray data = serial.readAll();

int num = data[0].prepend(data[1]);

ui->lcdnumber->display(num);

but it's doesn't work. Thanks

? Offline

Hi,
generally speaking, you need to take a look at bitwise operations in C++. Your problem boils down to:

quint8 a = 0xff;
quint8 b = 0x0f;
quint16 result = (quint16)b<<8 | (quint16)a;

Hope this helps!

Nopa11

It's work. Thank you so much