Geeetech

I can't find any documentation about how to flash a bootloader onto gt2560 v3 board. I have an arduino uno that I am going to use an arduino isp programmer to flash a new bootloader onto my gt2560 v3 board, but I can't find documentation on how to connect the programmer to the card. Could you please help me flash new bootloader onto my gt2560 v3 board?

Thank you for your help,
Eliot

Hello.


The ISP data transfer protocol is the best boon in the world.
In order to perform the planned operations you need to learn some knowledge. Then you will surely do it correctly.

The best guide will be the data sheet µC.
You don't have to read the whole document, just get to know the right part of it

I have read and understand the article at https://www.instructables.com/id/ATMEGA ... duino-UNO/
I have looked at the pinout for the atmega2560 chip available at http://ww1.microchip.com/downloads/en/D ... asheet.pdf
I have viewed the GT2560 v3 Schematic that I found on these forums. I can't find it now --- very hard to find.

So the solution boils down to the following board connections:

UNO pins -> ATMEGA2560 pins
10 -> 30 (RESET)
11 -> 21 (MOSI)
12 -> 22 (MISO)
13 -> 20 (SCK)
5v -> VCC
GND -> GND

The problem, as I should have described it better, is that i can't find any place on the motherboard (even with the diagram) to probe MOSI, MISO, and SCK --- except for on the LCD & SD CARD FFC40 strip. I guess I was just hoping there was another terminal on the board I could probe for this. Or even a terminal on the LCD board that could be probed. I don't think it exists. I cannot find a diagram for the LCD board.

I bought a FFC 40 pin fanout board so I can connect to pins 18, 31, 33, 32, 1, and 40 of the LCD & SD CARD FFC40 strip (RESET, MOSI, MISO, SCK, VCC, and GND respectively).

If you see any issue with this setup let me know. The fanout board will arrive on Tuesday, so I guess then we'll know.

Thanks for your time,
Eliot

Hello.


Pinout looks correct. I watched the diagram and actually there was no direct programming interface on it. This is not good, because such a connector should always be in every system where µC is used.

If you want, take a good quality photo and present it here.

Maybe the PCB has some soldering points to which you can solder wires for programming time.

You will also have to buy a programmer. I suggest USBASP, it is the most popular. And what is important is inexpensive.

For the time of programming I suggest to remove the controller board and disconnect everything possible. There should be only power supply and cables to the programmer.
You must also pay attention not to connect two power sources while preparing for programming.
It would also be good to know the configuration of µC to program the bootloader code.

I keep my fingers crossed so that everything can be done correctly the first time.

How is your board going?
Did it solve?

Hi.


I have prepared a FFC <-> ISP adapter project.
Thanks to this small board such operations will be easy and not much work to carry out.
In place of the LCD module, just plug in an adapter with an ISP programmer interface. I have prepared two popular variants of the programmer connector - ISP KANDA 10 pin, ISP 6pin.


The issue of production order remains open ... Maybe GT team will take up the challenge
. . The PCB is a square shape with a side length of 35mm.
If someone had any suggestions, it is a good moment to consult them now.

Don't be so modest anymore. If it wasn't for you, this project would never have been created.

Will this be helpful?
1.The Vid:
https://www.youtube.com/watch?v=2N1zgX8Gv54
Attached wires；
2.The pic: The Gnd and +5V: The 3(Reset): The 5(MOSI)+9(SCK)+10(MISO):

vert wrote: ↑

Thu Nov 29, 2018 3:44 am

William wrote: ↑

Mon Nov 26, 2018 10:10 am

Will this be helpful?
1.The Vid:
https://www.youtube.com/watch?v=2N1zgX8Gv54
Attached wires；
2.The pic:
GT2560V3 bootloader1.jpg

The Gnd and +5V:
GT2560V3 bootloader2.jpg

The 3(Reset):
GT2560V3 bootloader3.jpg

The 5(MOSI)+9(SCK)+10(MISO):
GT2560V3 bootloader4.jpg

so i tried this and it does not work tested on 1.8.5 and windows version.
Arduino: 1.8.7 (Linux), Board: "Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)"

avrdude: Expected signature for ATmega2560 is 1E 98 01
Double check chip, or use -F to override this check.
Error while burning bootloader.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

Could you attach the error details?

Thanks for your detail.I am checking it!