USB TERASIC BLASTER DRIVER

The cheap clone was never able to get reliable contact. For the overview, look at the upper set. What remains is the question about why the cheap clone doesn’t work. And at the end you have a suffix with 2 slow clock cycles. This is the first transaction that travels over the JTAG cable when you issue the “nios2-terminal” command. While the Terasic was rock solid in its communication with the Color3 board. In the middle there are 16 groups with fast clock cycles each group is itself 8 clock cycles.

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A fast clock group sets the clock at 12MHz instead of 6MHz. This is the first transaction that travels over the JTAG cable when you issue the “nios2-terminal” command. It may be that 12MHz is really just pushing things too much.

Zooming in on the slow clocks, we see a clock frequency of kHz. 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. And here’s the equivalent of the cheap clone.

For the overview, look at the upper set. The Terasic doesn’t have that problem: The suffix is really different, with 6 clock clocks but also a fast clock group in between.

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Programmer Accessories Terasic USB Blaster Download Cable | eBay

blasrer What remains is the question about why the cheap clone doesn’t work. For the cheap clone, the spacing is huge: There are 3 major sections: In addition, there are roughly 3 idle cycles between a fast clock group. Sign up Already a member?

I was supposed to work on getting the SiI up and runningbut UPS delivered a nice package today:. My money is on the clock speed: The set of signals below that is a slightly zoomed in version of the one above.

Terasic – USB Blaster Cable – USB Blaster Download Cable

The cheap clone was never able to get reliable contact. The most important signal here is TCK, in yellow. When you zoom in on the slow clock cycles, you can measure a TCK frequency of kHz: It’s not that it’s broken: And at the end you have a suffix with 2 slow tterasic cycles. If we ignore for a second that the cheap clone doesn’t work on this particular board, the biggest consequence of the chapeau clone is that bulk transfers are much slower: While the Terasic was rock solid in its communication with the Color3 board.

I was supposed isb work on getting the SiI up and runningbut UPS delivered a nice package today: A really interesting difference is in the spacing between fast clock groups: In the middle we have the expected 16 fast clock groups.

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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.

As I wrote earlierthe biggest issue with the cheap clone is that it doesn’t work on my eeColor Color3 board. We see a similar pattern, but interestingly enough, it’s not the same. About Us Contact Hackaday.

P0302 Terasic Technologies USB BLASTER DOWNLOAD 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. Yes, delete it Cancel.

In the middle there are 16 groups with fast clock cycles each group is itself 8 clock cycles. Meanwhile, during a fast clock group, the clock toggles at 6MHz. We have a prefix with 8 slow clocks, but in between the second and the third slow clock, there’s a signal fast clock group. All processing is done with a simply state machine.

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