Schematics for 7c81

It is going good, manage to fuse the 7c81_5abobx2d.bit to spartan 6 and playing around with Xilinx ISE 14.7 for custom builds. I have ordered some IC SP491 and 74lv04 that i am waiting for to test modbus, also waiting for 7I92TH from mesa.

After testing and playing around i will complete circuit with EASYEDA, in the end i will probably have FGPA with 2 x Parrellel ports(16 output/18inputs) and 2 x Serial/modbus ports replacing the  PI5C16211 with SN74HCT245N



This is a really steep learning curve for me because i am new to FGPA's but i will try and get this done

How much that will cost from easyeda ?

I will have to finish pcb and see how much if i order on jlcpcb, but i think it will be a lot more expensive than buying from mesa because they have a min order of 5 pcb.

UPDATES

I manage to compile bit file and write it to Spartan 6 xl9.  I did try to use a generic bit file (7c81_5abobx2d.bit) but my clock pin is different than on the mesa 7c81 board  (P50 -> P55) so had to first figure out how to do that. I used Xilinx ISE 14.7 and this link Making bitfiles for MESA Hostmot2 boards added missing source file and got it compiled.

 
 
 
 

I can now play around with the electronics image missing /media/kunena/emoticons/cool.png

 

 

Thanks for the link
Is that your FPGA board or a dev board (any more info on it)?

I bought it on Aliexpress  

 

I have also added the schematics and PCB layout. NOTE on the schematics it says 25Mhz Oscillator it is actually 50Mhz.

If you are new to FPGA's buy this JTAG Cable it works really great DLC10 Xilinx Platform Cable