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Alchitry Board to Board C...
Forum: General Questions
Last Post: LMN128
09-30-2022, 08:40 AM
» Replies: 1
» Views: 94
CU board wont program
Forum: General Questions
Last Post: billh
08-27-2022, 09:12 PM
» Replies: 2
» Views: 655
Bin file not found - but ...
Forum: General Questions
Last Post: billh
08-27-2022, 08:48 PM
» Replies: 0
» Views: 88
How is Alchitry doing?
Forum: General Questions
Last Post: howdyrichard
08-24-2022, 11:19 AM
» Replies: 1
» Views: 368
Cannot build the Cu base ...
Forum: General Questions
Last Post: citizen34
08-15-2022, 03:50 PM
» Replies: 0
» Views: 88
ICEcube2 licensing on Lin...
Forum: Tips and Tricks
Last Post: Haibara23
08-15-2022, 01:51 AM
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Bin file could not be fou...
Forum: General Questions
Last Post: compy
07-15-2022, 04:20 AM
» Replies: 3
» Views: 1,867
How to change Mojo-v3 USB...
Forum: General Questions
Last Post: Bob Young
07-11-2022, 12:56 PM
» Replies: 0
» Views: 200
Au can't work
Forum: General Questions
Last Post: alchitry
07-05-2022, 03:38 PM
» Replies: 1
» Views: 473
Can't get the Cu to work....
Forum: General Questions
Last Post: alchitry
07-05-2022, 03:38 PM
» Replies: 3
» Views: 834

  SRAM 16 Mbit (2M x 8) 10ns board
Posted by: LMN128 - 11-22-2021, 01:19 PM - Forum: General Questions - Replies (7)

Hi, I decided start creating board with SRAM 16 Mbit (2M x 8) 10ns included two of sets original sockets to use it as expand board. SRAM is more suitable for my projects than DDR included on AU/AU+. I welcome any idea and recommendation. Thanks a lot.

Attached Files
.png   Untitled.png (Size: 12.99 KB / Downloads: 23)

  Au .bin file loads but cannot program flash
Posted by: kanunay - 11-20-2021, 12:49 AM - Forum: General Questions - Replies (6)


For some reason I am unable to program the .bin files generated from Vivado to flash. It appears to program the flash ok, but after power is cycled there is no 'done' LED and the board does nothing. The .bin file itself works fine if just programmed into the FPGA.

I can program the flash with examples built in Alchitry Labs and those work. It's just the .bin files from my vivado projects that I cannot program to flash.

  Alchitry Ft
Posted by: podolski - 11-15-2021, 01:47 PM - Forum: General Questions - Replies (1)

Hello, I have bought the Alchitry Ft board and I'm trying to use it with the Alchitry Au+. Do you have any tutorials explaining how to use it? Or anyone experienced it and can give me a feedback?

Question Software trouble - unclear how to launch Alchitry Labs
Posted by: trackside - 11-12-2021, 10:05 PM - Forum: General Questions - Replies (2)

I'm currently looking at software simulation on Linux Mint 18 only... I want to buy some stuff, but things are really tight until January 2022. I was planning to install software on a new machine purchased for the purpose, but as I can't do that yet, I'm playing ultra-careful on the current Linux desktop I have.

Currently, I've downloaded/installed Lattice iCEcube2 and Alchitry Labs, but not enough of that software runs:

iCEcube2 launches, and has help files etc. I followed the tutorial, and it gets as far as the placement stage (with the Blinky example folder), then generates an error, and a red cross. That's not so bad though: At least the basic software runs.

iCEcube2 is supposed to have the much friendlier ModelSim bundled. There are certainly some related files in there, but I can't find an option for either launching it, or checking if it's there.

So I downloaded Alchitry Labs: Tarball, extracted, and... How do I launch/install that?

  General question (HDMI shield + Software question)
Posted by: Joena - 11-08-2021, 02:12 PM - Forum: General Questions - Replies (6)

Hi all, 

I was intrigued by the nice design and possible extensions of this new FGPA board.
I have 2 questions before I commit into buying this board (first the CU to get myself familiar with the setup).

1. Is the development software free to use with no ristrictions (eg no hidden fees or costs)?
2. Is a HDMI (with embedded audio) or VGA + external audio-out shield available for the Alchitry CU board?

I hope to hear from someone, thx so much in advance,

Jeroen Ensing
from Sneek, The Netherlands

Attached Files
.jpg   alchitry_cu.jpg (Size: 102.08 KB / Downloads: 5)

  Can see Mojo V3 on Com3, but can't erase/program
Posted by: MikeO - 11-04-2021, 04:27 AM - Forum: General Questions - Replies (5)


I have an old Mojo V3.  When I plug the USB cable into my Windows 10 computer, I can see "USB Serial Device (COM3)" in Device Manager.  However, when I use the Alchitry Loader to 'Erase', I get "Status: Connecting..." and it stays there.  I have to kill the program through Task Manager and on the second time I try to erase, I get "Status: Looking for Mojo serial port..."  Any ideas on what I might need to do to connect to the device?


  AU+ no longer works
Posted by: Ajuicyplatypus - 11-03-2021, 12:19 PM - Forum: General Questions - Replies (1)

I plugged the AU+ into my windows 10 laptop yesterday via usb c and the board ran with the default program. Then I programmed it using the alchitry loader a different example and it worked. 
Since then I moved to a new laptop and now the board is undetectable even with the same versions installed. I moved back to the other laptop and that now cant connect.
I have tested the output voltage and current from both the USB from a laptop and from the 2 power pins on the side of the board and they both draw what I would expect from it working correctly. Does anyone have any idea what is likely to be wrong with the board?
Is there any chance the USB-c from the new laptop might have killed one of the chips and now the FPGA is unprogrammable.

  CU - IO pin connection
Posted by: x46 - 10-29-2021, 04:56 PM - Forum: General Questions - Replies (1)

Good day,
Is there any way I can find out which pins on my Cu board are connected to which pin on the Io board? A list or something?

I need this info to be able to work with the io and cu board in icestudio.

With kind regards  Smile

  MOJO sdram
Posted by: alialaei - 10-18-2021, 03:54 PM - Forum: General Questions - Replies (4)

Hi everyone.
I have designed a new SDRAM shield for my own mojo board(with exactly the same SDRAM chip).
with two differences in comparison to the original SDRAM shield.

1. I did take it easy and didn't consider high-frequency PCB design stuff(no length matching) I think 100MHz isn't that high, is it?
2. due to some other considerations I've changed some pins:
      sdram_cs        from P115 to P118
      sdram_we       from P111 to P121
      sdram_cas      from P112 to P120
      sdram_ras      from P114 to P119
      sdram_ba<0> from P116 to P117
      sdram_ba<1> from P117 to P116
      sdram_a<0>  from P118 to P115
      sdram_a<1>  from P119 to P114
      sdram_a<2>  from P120 to P112
      sdram_a<3>  from P121 to P111
it means they are two-by-two changed as below:
P115  <> P118
P121  <> P111
P120  <> P112
P114  <> P119
P116  <> P117

mojo SDRAM test example with modified UCF does not work. (It acts as there is no SDRAM-shield on Mojo board)

Do you think what could be the cause of the problem?
Is 100 Mhz considered high such that could cause this problem? (I even reduced the clock but no achievement)

or could changing pins cause this problem?


Big Grin Vivado and licensing
Posted by: sng2021 - 10-08-2021, 12:30 PM - Forum: General Questions - Replies (1)


I am simply an experimenter and trying to learn more about FPGAs. I came across the Alchistry products and appeared to be a reasonable way to start. I understand I should be use Alcitry Labs to develop and experiment with the AU board. On reading about installation, I discovered I needed to install Vivado from Xilinx as well. I went to Xilinx's website and discovered that I needed to fill in a form pertaining to US Government approval for exports. I have filled such forms many time in the past while employed by various organisations. My purpose for learning about FPGAs is strictly as a personal project. How do I obtain Vivado if I do not want to include an employer's name or company name on the application form? I live in Australia which has always been on friendly terms with the US Smile