exxos's Atari, Amiga & retro forum

The latest TF536 firmware for version 2b can he found here:

https://www.exxosforum.co.uk/forum/viewt ... =93&t=3442

One problem I'm having... trying to get the firmware onto the TF using a Raspberry Pi.

I've built xc3sprog but when I use 'xc3sprog -c matrix_creator -j" it says no JTAG tags found.

Maybe it's due to the latest version of the distribution or the Raspberry Pi original Model B (256MB) isn't running the GPIO correctly?

Anyone got any ideas?

stephen_usher wrote: 14 Oct 2020 22:43 One problem I'm having... trying to get the firmware onto the TF using a Raspberry Pi.

I've built xc3sprog but when I use 'xc3sprog -c matrix_creator -j" it says no JTAG tags found.

Unless I'm missing something here, you should be using sysfsgpio_creator, not matrix_creator.

I tried that as root (as pi didn't have permission) and that gave the same error.

Sorry for asking but you have power to the TF536 right?

There's 3.3V from the Pi which is supposed to power the chip for JTAG, but I also tried with the board in the ST and powering it, but that stopped the ST from booting, even when the TF wasn't the selected processor and it didn't help the comms.

@stephen_usher You need to have the TF536 powered as the JTAG 3.3v does not power the TF536. Easiest way is to plug it into the ST and switch it on. It obviously won't boot until you've got the correct firmware in it, then its a quick press of the reset after programming and off you go.

I've never done it with a pi though but the voltage requirements are the same as using a Xilinx programmer.

You have to power the TF536 on the 5v rail to program it. There are exceptions to this but follow this rule to avoid killing things.

OK. I'll look into it. I may solder a power header on the TF536 so I can give it a stable +5V and GND as otherwise who knows what mayhem the noise might create.

PhilC wrote: 15 Oct 2020 16:02 @stephen_usher You need to have the TF536 powered as the JTAG 3.3v does not power the TF536. Easiest way is to plug it into the ST and switch it on.

terriblefire wrote: 15 Oct 2020 16:20 You have to power the TF536 on the 5v rail to program it. There are exceptions to this but follow this rule to avoid killing things.

Really? Both times I've programmed mine, it's been out of the computer, powered by the Raspberry Pi via the JTAG connector. Should I not be doing that? If that's the wrong way to be doing this, why does the JTAG connector even have a power pin?