mega 2560 pro ( Robodyn) supported?

[Jose Morales]

Hi all, I'm new to Forth and to the forum. I have a couple of these boards laying around, I have flashed them with avrdude, but for what ever reason, I can't get any of them to give me a console, has anyone manage to get them sorted? Was looking into FlashForth with it's support for I2C as the main attraction to learn ( was on my bucket list) and develop some quick projects around the house.

I'm on windows, but I could only flash the boards on a RPi running Linux as the Arduino IDE has issues ( well windows drivers issues) to properly get the boards connect with the 6.x version of AVRDUDE that it's running. If I run the current version, I can flash the cards, but in Windows, they miss behave and it looks like there is a reset after flashing and I get a avrdude: usbdev_open(): did not find any USB device "usb" (0x03eb:0x2104) time out message. I was able to load several hex files that I created with blinky on assembly I found on stockexchange, they all work...

;blinky.asm
;turns on LED which is connected to PB5 
.equ    PORTB   = 0x05
.equ    DDRB    = 0x04

    ldi r16,0b00100000
    out DDRB,r16
    out PORTB,r16
Start:
    rjmp Start

I'm not sure what is going on, but it's frustrating not knowing this platform as much as I do the ST or TI boards. Please advice.

What do I see, I set TeraTerm ( I'ved tried every combination possible) but I've never had an issue trouble shooting HW serial connection. I see TX ( or I should say the RX on the board) give a receive signal but there is no response.

Well, as I was typing this, unless someone has found a way to successfully use this board, I think I will give up on them... simple serial output seems to be a challenge with the CH340 chip... from all am reading.

Anyhow, worth a shot, else please advice on some true and tried boards.

Cheers from Spain!

[Jose Morales]

Hey everyone, quick update, resolved my issue, been bitten by this twice now in into weeks, it was the programmer cable.

Man, that took a while, recompiled the code several times... and then... could not believe that 3 for 3 the boards where bad... I moved over to a friends house, took the code with me and it worked first try... I took my laptop out reflashed and it failed, that is when I thought, wait, give me just your cable... and it worked.

words
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[Frans-Pieter Vonck]

You probably have already found 0033mer's channel, on youtube about using flashforth. Here is a demonstration of the use of the mega 2560 pro board
https://www.youtube.com/watch?v=WYLUM_mbCvI

[Jose Morales]

Hi, thank you for following up with me. As I mentioned, the issue was with
my cables, it just so happened that I could flash anything ( using avrdude
) but it failed only when I was flashing FF5.0. When I tried to load a
bootloader since I would not see anything on the board, I realised I could
no longer flash it, which led me to take the board to a friend's house and
we successfully flashed everything on it. When I used my AVRISP, it then
failed, which led me to change the cable and solve the issue. Greatly
appreciate your comments. I did post on his video, but I guess he did not
like me questioning what param he used to flash his board as it was erased.

On Sun, Jun 5, 2022 at 10:48 AM Frans-Pieter VOnck oberoid@users.sourceforge.net wrote:

You probably have already found 0033mer's channel, on youtube about using
flashforth. Here is a demonstration of the use of the mega 2560 pro board
https://www.youtube.com/watch?v=WYLUM_mbCvI

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mega 2560 pro ( Robodyn) supported?
https://sourceforge.net/p/flashforth/discussion/726813/thread/40d6b08197/?limit=25#f4c2

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