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  1. @JColvin You are still focusing too much on the cables. The only statement that really needs to be addressed, and is probably an understatement is: >Also, it is my understanding that the Cmod A7 (for reasons unknown to me) appears to also be more susceptible to this I agree, you do have a USB design issue, I suggest you give all existing users of this product a discount voucher for your new improved USB re-designed Cmod-A7 and like I have said before, if you did not hide that part of the circuit, which is crazy, us engineers/customers could help you out with that design
  2. @zygot This USB issue is also discussed at the end of this thread: Digilent have been very quick to blame the cables ... but like you, I have used my "faulty" cables on a number of other vendor boards without issue. Looks like Digilent have some re-design to do regarding the high speed USB area of the board. Let's hope version II is better .. There is even a similar issue on the Xilinx forum that could be this fault:
  3. @JColvin > 9k and 300k iterations Not sure what that means: You did 300k programs on the one cable? Testing should be trying a number of cables, because doing multiple tests on the same cable is pointless. (After all, the definition of madness is to repeat the same thing expecting a different result) > I imagine this does not come up frequently during single use cases as much as one would think from a poorly constructed cable. For me, and at least one other on this forum, it errors out every time on a cable and we tried a bunch of cables. .... and I mean a bunch
  4. @JColvin Noted: Many thanks. Although it does seem strange that those same "faulty" cables work perfectly fine on other development boards like Lattice ICE40 boards, and Papillio Duo/Pro boards of which I have many and none have this issue.. Cheers, Bernie
  5. bmentink

    Cmod-A7 power budget

    @jpeyron Thanks Jon, It begs the question though: Why on earth have you got a proprietary circuit in this day and age of open reference designs? There are multiple boards out there with published FTDI22xx based USB->JTAG interfaces .... I fail to see what benefit it is to you, or users by hiding that circuit ... maybe I am missing something .... The fact is, if the programming circuit is open or closed, it makes no difference to my decision to include this board as a module in my designs .... (Actually I am more likely to use it if I understand the board ..... competely)
  6. bmentink

    Cmod-A7 power budget

    @jpeyron Cool, thanks .. EDIT: That dropped it to 80mA from 130mA .. still can't figure out why so much greater than the Spartan-6 PapillioPro board .. PS: I eluded to this in my other thread, but will there be a complete schematic anytime soon? It would be good to see how the FTDI chip is wired ..
  7. @[email protected] I don't think that is the issue ... a powered hub or different port made no difference. Also I have the same issue on another PC. Also, I measured the 5V current while it was performing the erase/programming stage and it goes right down to 5ma, then back up to 130mA run current on reset which is no where near the USB 500mA allocation. A program after the 1st boot up of the PC always works ... subsequent ones don't .... if it was a power issue I would expect variable results on the 1st program as well .. I have tried multiple cables. Cheers, EDIT: I see
  8. @jpeyron Ok, I used your files and it flashed the led.bin file ........ once ... the next time it error'd out with: It seems the HW server crashes after programing the device, it will only program again if I reboot the machine ... I also see the USB device fails enumeration after the one program .... which also maybe the issue .. I get in dmesg: I have to move the device onto another usb hub to get a good enumeration ... or reboot. EDIT: SUCCESS: After a reboot, my bin file also programs .... once ... I wonder if the hw server is crashing and ty
  9. bmentink

    Cmod-A7 power budget

    Hi Guys, Is there a way to measure the Artix-7 current directly on the board, or alternatively a way to disable the FT2232HQ device as it draws 100mA by itself. At the moment with 130mA drawn from 5V total board comsumption, that would place the Artix-7 + mem chip + osc + reg at 30mA which seems quite high. (My Papillio-pro board with a Spartan-6 was [email protected] (70mA used by a lower power FT2232, so that made it 10mA for the Spartan-6 etc... the Artix-7 is mean't to be 50% less power than the Spartan-6) ... they are both clocked at 80Mhz .. Weird ..
  10. @jpeyron Thanks, but as mentioned in a previous post, I had already used the SPIx4 interface option. I have posted on the xilinx forum as well, will update this post if I have any luck. I also said I was using @malexander's script .... it is his script that is not working! PS: I don't want to use the GUI intially because it plasteres files all over my nicely formated project tree .. I will just program the FPGA for now and will wait to program the flash until there is some support to do that. It just means I can't easily test my product as it is battery powered.
  11. @Natsu I disagree somewhat. Digilent should be able to support their boards, they made them , not Xilinx, and they should provide a howto for non-gui development on their boards, or at the very least provide differences from the xilinx boards so I can make changes to the xilinx scripts .... if I can find them. After all, the schematics are not even complete for the cmod-a7 board .... so am I supposed to guess the connections? >Digilent isn't obligated to support non-GUI usage of Vivado. Why not? By your argument they don't have to support GUI usage on Vivado either then
  12. @jpeyron Hi any joy on this from your co-workers? Cheers, B.
  13. That did not work, I get: The ball is yours ...
  14. @jpeyron Hmm, thought the Flash was a 4-bit wide Micron so not sure why the BPI example .... are you saying I should use bpix4 ?? Maybe someone at Digilent would know what -interface setting I should use .. for their hardware ... (I don't know if you work there or not? ) I went of this document, that states to use SPIx4 ...
  15. @jpeyron Thanks Jon, Now I get the following error: