Andrew Leech wrote:
> On a different matter, I'm currently using this part on a chain with an
> Actel A3P125 FPGA

I'd look at buying an IGLOO Icicle ($69 or something). It includes an
Actel "LCPS" (Low-Cost Programming Stick) which is the equivalent of
a FlashPro 3, and works with Libero. Just to make sure that
programming works "their way".


> my separate fpga jtag programmer (altium designer and their jtag
> dongle) doesn't work when it's connected in the chain, I think it's
> a bit light on the buffering and suffers from noise. It only just
> works when connected directly to the fpga.

How does this work? Is the LPC still on that chain and you connect
Altium dongle in between them?


> I've generated svf files with the actel software and tried playing
> them with openocd, but it errors out:

I don't believe OpenOCD SVF has been exercised much. You could try
using UrJTAG instead. I also find Altera's STAPL player source very
interesting for use with Actel parts, but that road needs a bit of
work before it could function.


>       Error: tdo check error at line 38
>       Error: read = 0x542439E, want = 0x3A121CF, mask = 0x6FFFFFF
>       Error: fail to run command at line 1633

How long is the file?


>       Error: tdo check error at line 38
>       Error: read = 0x542439E, want = 0x3A121CF, mask = 0x6FFFFFF
>       109052 ms used

It did run for a good while..


> For reference, line 38 is:
> SDR 32 TDI(00000000) TDO(03A121CF) MASK(06FFFFFF);
> And line 1633:
> SDR 26 TDI(0000000);

This is not really helpful without more context.


> Is there any specific setup of the tap I would need to do before
> running the svf command?

Dunno.


> might there be a different way to flash the actel with openocd not
> using svf?

No. The other way would be STAPL but OpenOCD doesn't do that.
(Neither does any other popular open source program, besides Altera's
code.)


//Peter
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