QT to connect ft232 fifo mode

swansorter

hai i am able to detect the ttyUSB0 usig

USB=new QSerialPort("/dev/ttyUSB0");

USB->open(QIODevice::ReadWrite);
if (!USB->isOpen() )
{

    // qDebug() <<"use sudo usermod -a -G dialout $USER";
    qDebug() <<"USB is NOT OPEN";

    //QCoreApplication::exit(0);
}
else
{
    qDebug() <<"USB is OPEN";
}

but if i write value its not going to destinaton y?

USB->write((const char *)sendbyte,7);

SGaist

Hi,

What is sendbyte ?
How do you determine it's not going to the target ?

swansorter

@SGaist

unsigned char sendbyte[7];
sendbyte[0] = 0x43;
sendbyte[1] = 0x41;
sendbyte[2] = 0x50;
sendbyte[3] = 0x54;
sendbyte[4] = 0x55;
sendbyte[5] = 0x52;
sendbyte[6] = 0x45;

In destination device we are giving acknowledge for command .its not coming.
After opening the port its should generate clock which is not generating

how to open a serial port in synchronus_fifo mode?

mrdebug

baud rate, data length... Where are?
setDataBits
setBaudRate
setStopBits
setParity

swansorter

@mrdebug i am working on usb in fifo mode not usb to rs232 mode

mrdebug

Maybe you shouldn't use QSerialPort but something like this approach:
https://ftdichip.com/wp-content/uploads/2020/08/TN_167_FIFO_Basics.pdf
page 25

swansorter

@mrdebug yes exactly

swansorter

@mrdebug DO have any c++ library for that
i used same program

FT_HANDLE fthandle1;
FT_STATUS status;
status = FT_Open(0, &fthandle1);
if(status != FT_OK) 
{
printf("open devicestatus not ok %d\n", status);
return0;
}

it showing failed to open.

mrdebug

No but it is not so hard to write one. If you haven't got time to write it you can ask to someone to write it for you. Which operating system? If you need business help please send me an email.

swansorter

@mrdebug OS ubuntu16.04,
If you know how to do that please help me.