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Alen1214's avatar
Alen1214
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3 years ago
Solved

De10 standard connects to esp8266 via uart communication by IP uart (rs-232 serial port)

Hi, I need to communicate between de10 and esp8266 to send data to the cloud, but first I need to connect these 2 kits base on project GHRD. I see they can connect with each other by IP uart rs232 an...
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  • tehjingy_Altera's avatar
    tehjingy_Altera
    3 years ago

    Hi Allen


    Do you have a scope available to measure the signals coming out from the pins?

    Do you have the specification for the USB transceiver that you are using? What operating signal logic it is able to capture?

    The signals coming out from the GPIO are 3.3Vs.


    Regards

    Jingyang, Teh


Alen1214's avatar
Alen1214
Icon for New Contributor rankNew Contributor
3 years ago

Hi Jingyang, Teh

I send you some waveforms corresponding to some cases.

1. configure set fixed baudrate 9600 in qsys:

waveform correct with data "57" but baudrate is not correct (a)waveform correct with data "57" but baudrate is not correct (b)
2. uncheck set fixed baudrate in qsys:

when i set clock = 50M and divisor = 7400 then it correct all.

waveform when i set divisor = 7400

I hope with the information I provided you can find the source of the error.

Regards

Alen (Phan Quang Ky)