ALTERA TERASIC BLASTER DRIVER DOWNLOAD

Meanwhile, during a fast clock group, the clock toggles at 6MHz. For this investigation, it doesn’t matter what gets transported when, but it’s almost certain that the slow clock cycles are used to move the JTAG TAP from iDLE state to the scan DR or scan IR state, and that the fast clock groups are used to rapidly scan data in and out of a scan data register. The suffix is really different, with 6 clock clocks but also a fast clock group in between. In the middle we have the expected 16 fast clock groups. Sign up Already a member?

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In addition, there are roughly 3 idle cycles between a fast clock group. It may be that 12MHz is really just pushing things too much. As I wrote earlierthe biggest issue with the cheap clone is that it doesn’t work on my eeColor Color3 board. For this investigation, it doesn’t matter what gets transported when, but it’s almost certain that the slow clock cycles are used to move the JTAG TAP from iDLE state to the scan DR or scan IR state, and that the fast clock groups are used to rapidly scan data in and out of a scan data register.

It looks like the cheap clone is able to squeeze out bits really fast, but there’s quite a bit of software overhead in processing the next byte in the USB packet. A really interesting difference is in the spacing between fast clock groups: In the middle there are 16 groups with fast clock cycles each group is itself 8 clock cycles. The cheap clone was never able to get reliable contact.

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USB Blaster Cable

But the cheap clone runs TCK at exactly double the speed of the Terasic, and both devices only use a flimsy, cheap flat cable. Meanwhile, during a fast clock group, the clock toggles at 6MHz. All processing is done with a simply state machine. When you zoom in on the slow clock cycles, you can measure a TCK frequency of kHz: Sign up Already a member? The set of signals below that is a slightly zoomed in version of the one above.

This is the first transaction that travels over the JTAG cable when you issue the “nios2-terminal” command. Zooming in on the slow clocks, we see a clock frequency terwsic kHz.

And here’s the equivalent of the cheap clone. And at the end you have a suffix with 2 slow clock cycles.

Terasic – USB Blaster Cable – USB Blaster Download Cable

A fast clock group sets the clock at 12MHz instead of 6MHz. Yes, delete it Cancel. It’s not that it’s broken: While the Terasic was rock solid in its communication with the Color3 board.

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I was supposed to work on getting the SiI up and runningbut UPS delivered a nice package today: In the middle we have the expected 16 fast clock groups. My money is on the clock speed: If we ignore for a second blasster the cheap clone doesn’t work on this particular board, the biggest consequence of the chapeau clone is that bulk transfers are much slower: We have a prefix with 8 slow clocks, but in between the second and the third slow clock, there’s teraskc signal fast clock group.

The most important signal here is TCK, in yellow. We see a similar pattern, but interestingly enough, it’s not the same. I was supposed to work on getting the SiI up and runningbut UPS delivered a nice package today:. What remains is the question about why the cheap clone doesn’t work. For the cheap clone, the spacing is huge: The suffix is really different, with 6 clock clocks but also a fast clock group in between. The Terasic doesn’t have that problem: