I would like to build a frequency counter and use a Cpld for the divide by 10 logic. Are 36 macro cells enough for that purposive ? A dived by 10 and 100 logic would be even better. Unfortunately I am an absolute beginner and have no idea how much logic 36 macro cells could cover.
UrJTAG 0.10 #1869 Copyright (C) 2002, 2003 ETC s.r.o. Copyright (C) 2007, 2008, 2009 Kolja Waschk and the respective authors
UrJTAG is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. There is absolutely no warranty for UrJTAG.
jtag.c:518 main() Warning: UrJTAG may damage your hardware! Type "quit" to exit, "help" for help.
After all shorts gone, I started to repopulate the board. Guess what, it worked from the first try, I introduced no errors, unbelievable, considering the fine pitch of the ft232.
So why going through all this hassle and not buying a populated board from seedstudio ? For me this board has a kind of personality, I spent hours to bring it to live, every time I will work with it, it will remind me I successfully tamed the monster.
This board is definitely not suited for a beginner, the ft232 is a bitch to solder and bug hunting might cost hours. I would suggest to buy one and ask Ian for a Cpld board, which are much more simple to solder but they still are a challenge.
Ian thank you verry much for this board and all your support. I love the work you are doing here.
When I build a new circuit, I like to reuse as much components as possible. Not because I am a cheap stake (at least not only) but because I like the idea of reuse. I usually visit a junk yard once a month and salvage some pcbs from there. Here is a pic of pcbs I used for the bus blaster.
The most important tool when working with smd parts is a LC meter. I bought this one a while ago and love it, it is very accurate and works down to a pico farrad without any troubles.
This really was a demanding project. I already populated the Usb part of the circuit and wanted to test it, but unfortunately there was a short between ground and the 3V3 rail. I suspected it was a bad solder joint and searched for it with a microscope, but I could not find it. In the end I had no choice but to remove all already components. It was an act of desperation. Sometimes you introduce a short, you can't see because the solder crept under the component. Everything removed and inspected, guess what, the short was still there,...
When I flipped the pcb, it struck me like lightning, there were etching errors on it.
Is there an advantage of the logic shrimp above the logic analyzer ? The prices do not differ much, so why buying the shrimp if you could get the analyzer ?
I bought the icd2 clone from Olimex, because my self built icd2 clone could not programm the pics used in the bus pirate.This was the first time my clone could not programm a pic chip.
Finally my board got shipped, hope it leaves China before their new year feast starts. Somehow I doubt it though.
It seems even China Ems is slow nowadys. Ordered a Rigol scope and since a week there is no progress, they just confirm that they have received the parcel. Usually Ems takes about three days from pickup to delivery,.... I cant await to get my first scope with coulor lcd.
For a new revision, I would consider logic input gates and an adc, so an input voltage treshhold could be set. The trend goes to lower and lower voltage systems. Such a feature would be much more important for me than bandwith.
