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

[Alen1214]

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 and I can do the steps:

build qsys => modify file top.v =>run quartus=>generate file hex.

And now i need code use hps control it send data, example send "abcde" to tx port with baund rate 9600 or 115200. But i don't know how to do it ?. So I really need your help. I attached 3 pictures I made.Thank you very much. 

QSYSadd external port for uart rs232file hex contain rs232_0_base

[JingyangTeh_Altera]

Hi Alen

Did you manage to get the waveform for the uart baud rate?

Regards

Jingyang, Teh

[Alen1214]

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)

[JingyangTeh_Altera]

Hi Allen

Thank you so much for the waveform!

I will be checking with the engineering team on this.

I notice that the Quartus version that you are using is quite old.

There could be a possible chance that this have been fix in the newer version of the Quartus.

I tried out recently using the Quartus 22.1 and able to send and receive serial successfully.

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Regards

Jingyang, Teh