Olimex - Argon Light 2 GPIO Pinout Assignments

[Gelpack]

Hi Folks,

I now have my 'Olimex - Argon Light 2' now working and have created an Autoexec.txt to get it to boot into Basic on Startup which all appears to work fine.

So, the next step is to try and make sense of the GPIO pin assignments and how to use them, I am familiar with Arduino, so what I need to know is what all the pins features are on this Olimex build. But for the life of me I cant seem to locate this piece of information. Ive found loads of documents containing things like schematic.json and geber's etc etc, but no schematic/chart or table telling me what pins have what specific primary or secondary, tertiary abilities. A Chart should have been made easy to find really its pretty basic stuff, I am sure its somewhere, but I have not seen it thus far

There is a 40 pin connector * BOTTOM RIGHT OF THE PICTURE BELOW * which is supposed to have 20 general purpose pins on the board, see below.

So if anyone has a link to this information I would be very grateful.

Cheers

[Gelpack]

OK, I found it.


https://github.com/OLIMEX/AgonLight2/bl ... manual.pdf

[paulb]

So if anyone has a link to this information I would be very grateful.

The Agon Light 2 product page has the usual selection of links to documentation. Maybe some of that is helpful.

[atsampson]

On the AgonLight2 schematic, the GPIO port is on p3 - it's got some pins connected to the eZ80 chip (PC0-7 and PD4-7) and some to the ESP32 chip (IO26-27 and IO35-39). Each of those chips is labelled with all the functions for each pin on the schematic, and there's a more detailed table of all the pin functions in the eZ80F92 datasheet on p13.

[Gelpack]

Thanks

I have found the PINOUTS and got them connected up to a breadboard, but I just want now to find a simple set of instructions on how to exercise the read and write to GPIO 0 and GPIO 1 from BBCBasic.

In C++ for Arduino, its very simple, and I am sure it is for Agon Light 2 as well, just a matter of finding it. The problem is developers who already know their way around this setup are giving answers which raises more questions that are answered as far as I can see

The information I have seen so far only relates to C++. Shoot, there is so much fragmented information everywhere, I think they have achieved one goal at least to make it worse than BITD in terms of none centralised information and multiple versions of the same board. Nightmare

Any assistance will be helpful.

Cheers

[hoglet]

Any assistance will be helpful.

This might be worth a read:
https://olimex.wordpress.com/2022/12/22 ... bbc-basic/

[Gelpack]

Thanks for that, this is a nice simply laid out blog.

I'm going to give it a shot and report back

Much appreciated.

[Gelpack]

@Hoglet

Thank you, it's so easy when you know how. Works just fine

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