exxos's Atari, Amiga & retro forum

That was fun! Thanks, Exxos, for the PCB, and, for pre-populating the underside of the card.

Unfortunately, I ran out of round pin headers last week, and am still waiting on them to arrive from California. USPS is so messed up right now -- they arrived at my local postal distribution center here in Louisiana earlier this week, only to be sent to Nebraska the next day.

Does it have to be plugged into the 68000 socket to program the CPLD, or, is enough power supplied from the JTAG to do so?

Thanks!

The JTAG connector doesnt supply power. It uses that pin as a reference for what voltage to use programming the chip. Its literally a Vref.

Some kind of power is required.

Nice soldering, hopefully an instant success when you have programmed the CPLD and fitted the pin strips. :)

Can I connect a 5v source to the two pin header in the center of the 68000 socket's silkscreen for power?

I converted the .jed to an .svf file and tried to program it using a USBFlashcat, but kept encountering an error that
the "JTAG chain wasn't valid because not all devices have BSDL loaded." Is this related to not having power to the board?

Guess I'll have to break down and get a Xilinx cable and install iMPACT.

obitus1990 wrote: 27 Mar 2021 05:27 Can I connect a 5v source to the two pin header in the center of the 68000 socket's silkscreen for power?

I converted the .jed to an .svf file and tried to program it using a USBFlashcat, but kept encountering an error that
the "JTAG chain wasn't valid because not all devices have BSDL loaded." Is this related to not having power to the board?

Guess I'll have to break down and get a Xilinx cable and install iMPACT.

Yes, apply external power using the two header pins near the regulator.

There is a way of programming the CPLD with a Raspbery Pi that is documented on the TF github pages.

Anthony

LADmachining wrote: 27 Mar 2021 06:32
There is a way of programming the CPLD with a Raspbery Pi that is documented on the TF github pages.

Anthony

I thought the github pages were "rm -rf" except for the binaries?

If you use the Pi don't connect the Vcc/3.3V reference connection. It's dangerous.

I asked the manufacturer (embeddedcomputers.net) of my FlashCatUSB programmer about this CPLD, which is listed as a supported device in the programming software's docs. He stated he would fix it by the end of next week, so, I will hold off on buying the Xilinx cable, or, using the Pi.

FlashCatUSB was updated to handle the Xilinx, so I tried to program the CPLD tonight, to no avail. Let me know if I have done this correctly:

Open ISE iMPACT, start a new project, and manually create a boundary scan file. Save said boundary scan file, then, when prompted, open the .jed to identify the CPLD. Then, start recording the .svf file, starting with a blank check, then an erase, program, and then verify command. After this, I have iMPACT stop recording the .SVF file. I then load FlashCatUSB software, which detects that it needs to be working in JTAG mode automatically and detects the CPLD correctly. It prompts me to load the SVF file into its SVF player, which I do, but, it errors out as per the following capture from the console window. I have also tried recording the SVF with only a program and verify command (to keep the recording as simple as possible), with the same result. I don't have a Xilinx cable, so I haven't tried this any other way. I was trying to avoid buying yet another programmer that I will likely only use once or twice, but, if I have to, I will.

Did I do something incorrectly, or, is it related to using this third party programmer?

Thanks!

@obitus1990

I took me a long time to make Impact working correctly.

Have you considered using RaspberryPi for programming?