Re: [Xc3sprog-users] Programming XCFxxP flash PROMs

[Joris v. R. <jo...@sr...>]

On Friday, July 09, 2010 11:15:13 Uwe Bonnes wrote:
> What is the program time now?

About 480 seconds to program 24 Mbit.

In the Linux kernel that I used, the option for high resolution timing 
was turned off. Today I figured out that high resolution timing greatly 
improves the accuracy of usleep. I will enable this setting and test 
again next week.

> Btw: Any chance to look at the TDO driving gate on the S3 kit?

I did not precisely understand your remarks (I'm not an electronics 
engineer). But let's try. On the S3 starter kit schematics, the type of 
IC2A is not specified. On the actual board, I can see an IC2 which is a 
tiny surface mounted thingy, marked something like "WOC".

The Pender GR-XC3S1500 also fails with the parallel cable. Its schematic 
shows that TDO is driven directly from the FPGA's TDO pin without any 
components in between.

Just to be sure, let me say again that the issue is only with the check 
for "missing power" at initialization time (which then aborts the 
program). If that check is skipped, programming with the parallel cable 
works absolutely fine for me. 

Greetings, Joris.