Uart data corrupt if working with Qt Qml on Allwinner A20 legacy kernel

[SGaist]

Hi and welcome to devnet,

Did you check that you are setting up your serial port correctly ?
How do you know whether you got all data ?

[AneoX]

This post is deleted!

[AneoX]

@SGaist
Hi!
I am sending 96 bytes packet with CRC every 155ms, data corrupt

[SGaist]

How are you setting up the QSerialPort you are using for your application ?

[AneoX]

@SGaist

setPortName("/dev/ttyS1");
setBaudRate(1500000);
setDataBits(8);
setParity(0);
setStopBits(1);
setFlowControl(0);

if (open(QIODevice::ReadWrite))
{

..............

it working well, if run alone

[SGaist]

You should also check that setBaudRate is successful.

Then are you using in your port in the main thread ? If so, you should move its handling in its own thread.

[AneoX]

@SGaist
baud is correct, i can see it with logic analyzer
i have made new class inherit from QSerialPort and then

QThread *serialThread = new QThread();
mySerialClass = new MySerialClass();
mySerialClass->moveToThread(serialThread);
serialThread->start();
serialThread->setPriority(QThread::TimeCriticalPriority);

[SGaist]

I didn't imply that the value was wrong, setBaudRate returns a boolean, that's the return value I suggested to check.

[AneoX]

only solution is decrease baud rate

[SGaist]

Nice !

In that case, please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)