How to create signal every microsecond?

banhmisua

hi, everyone.
I have a GUI application require high speed. Every microsecond i receive 1 data. So I need create signal every microsecond to connect slot(receive data).
I'm a newbie. if u have example code, it help me a lot.
Thank a lot!

J.Hilk

@banhmisua said in How to create signal every microsecond?:

I have a GUI application require high speed. Every microsecond i receive 1 data

I highly doubt that, there is no displaying device with a 1.000.000 Hz refresh rate and neither can you or your eyes actually see/process that

banhmisua

@J-Hilk i use project about DE1-SoC FPGA, plot sin wave with period some Mhz ( by use NCO, Qsys) in QT GUI. So i need signal microsecond fast enough to capture data.

JKSH

@banhmisua said in How to create signal every microsecond?:

i use project about DE1-SoC FPGA, plot sin wave with period some Mhz ( by use NCO, Qsys) in QT GUI. So i need signal microsecond fast enough to capture data.

A CPU cannot capture data that quickly.

You will need to do some hardware buffering and read the data in "blocks": For example, using a DMA FIFO, make your FPGA capture and store the data and then make your CPU read a block 100000 data points every 100ms.

banhmisua

thank u very much! I'll try do it.

sierdzio

There is no timer in Qt which gives accuracy below 1 ms: https://doc.qt.io/qt-6/qt.html#TimerType-enum