I'm in the market for a PC-based Logic Analyzer.
I am googling right now and getting lots of hits.
The interesting thing for me is that I dont need anything very fast. I would say in the rates of 9600.
I am using the tool for its sampling capabilities. So it needs to store at least 8 bytes of data for me.
I will also say that the data that I am reading is being bit banged 56 bits long... so NO I cant do something like reading my data to hyperterminal.
NEEDS TO BE CHEAP TOO!
PC-based Logic Analyzers
anything out there seems like it would be overkill for what you need.
http://www.pctestinstruments.com/ is a favorite $400
i own a http://www.tech-tools.com/dv_main.htm but that was before I learned of the logicport $500
http://www.saleae.com/logic/ is a small one for $150 that seems decent. Never herd anything about it but sparkfun sells it so its probably be decent.
http://www.pctestinstruments.com/ is a favorite $400
i own a http://www.tech-tools.com/dv_main.htm but that was before I learned of the logicport $500
http://www.saleae.com/logic/ is a small one for $150 that seems decent. Never herd anything about it but sparkfun sells it so its probably be decent.
Re: PC-based Logic Analyzers
Are you collecting physical layer data (risetimes, jitter,Sambuchi wrote: I'm in the market for a PC-based Logic Analyzer.
amplitudes)? Or, are you collecting decoded data words?
Why not sample your unknown with a homebrewSambuchi wrote:The interesting thing for me is that I dont need anything very fast. I would say in the rates of 9600. I am using the tool for its sampling capabilities. So it needs to store at least 8 bytes of data for me.
uC based reader? You could collect a lot of data
and examine it later usin tools on a PC (or even the
uC tools running on your PC).
Why not? Are saying you need to read 56 consecutiveSambuchi wrote: I will also say that the data that I am reading is being bit banged 56 bits long... so NO I cant do something like reading my data to hyperterminal.NEEDS TO BE CHEAP TOO!
words (bytes)?
A uC solution of your own should leave you "change
from a twenty" (dollar bill).
Can I assume you are analyzing parallel data? How wide? 8 bits ? How long/deep is the data. ( 1 byte wide by 56 bits deep) or (1 bit wide by 8 words of 56 bits long). Nothing more than 8 bits wide will be cheap.
I ask because serial protocol analyzer might be another class of test equipment to look at. If you can stream it to or from a serial port (either direction), there are a number of software only utilities for capturing that data for analysis. Try Googling "Serial Spy". There are also a bunch of Parallel port monitor software out there of various capability. (strangely I got more hits with the misspelling parallell)
look around, I seem to recall some low performance (8 bit wide) logic analyzer projects based on the parallel port.
Here's one, it only uses one 74HCT245 and shareware software, is that cheap enough?
http://www.xs4all.nl/~jwasys/old/diy2.html
Lots more if you google "Parallel port logic analyzer"
Are you acquiring data synchronously or asynchronously (with or without a clock)?
I ask because serial protocol analyzer might be another class of test equipment to look at. If you can stream it to or from a serial port (either direction), there are a number of software only utilities for capturing that data for analysis. Try Googling "Serial Spy". There are also a bunch of Parallel port monitor software out there of various capability. (strangely I got more hits with the misspelling parallell)
look around, I seem to recall some low performance (8 bit wide) logic analyzer projects based on the parallel port.
Here's one, it only uses one 74HCT245 and shareware software, is that cheap enough?
http://www.xs4all.nl/~jwasys/old/diy2.html
Lots more if you google "Parallel port logic analyzer"
Are you acquiring data synchronously or asynchronously (with or without a clock)?
I've been looking at this one - http://www.sparkfun.com/commerce/produc ... ts_id=8938
Also, microchip's PICKit2 can be used as a 3 channel LA. It's only $35. (and you get a PIC programmer to boot...)
Also, microchip's PICKit2 can be used as a 3 channel LA. It's only $35. (and you get a PIC programmer to boot...)
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