Data.Stdf

Structured Test Data Format (STDF) is used to log test data by semiconductor automated test equipment (ATE).

There's a couple of good, open-source libraries for parsing STDF, notably PyStdf.

The Data.Stdf advantage

1. Haskell
2. Fast

Install

cabal install stdf -- Is a TODO. Just clone and build the package

Usage

Here's an example of converting STDF to JSON. (What else would you want to do with it?)

import Data.Stdf
import qualified Data.ByteString.Lazy.Char8 as BL
import Data.Aeson

-- unparsed records have type Raw for the time being
notRaw :: Rec -> Bool
notRaw (Raw _) = False
notRaw _       = True

main = do
    raw <- BL.readFile "test.stdf"
    let recs = parse raw
    let goodRecs = filter notRaw recs
    mapM_ (BL.putStrLn . encode) goodRecs

Included Examples Applications

• WaferMap -- prints a pretty wafermap like this:

$ Examples/WaferMap test.stdf
File: test.stdf
.   .   .   .   .   11  11  11  11  11  .   .   .   .   .   .
.   .   .   11  11  11  11  6   1   6   11  11  11  .   .   .
.   .   11  11  1   11  11  11  1   11  1   1   11  11  .   .
.   1   1   1   11  1   1   1   1   6   6   6   1   1   11  .
203 11  11  11  11  11  1   6   11  1   1   11  1   11  11  .
11  11  11  11  1   11  6   1   1   1   11  11  11  11  11  11
11  11  11  11  1   1   11  1   11  6   1   11  1   11  11  11
203 11  11  1   1   11  6   1   11  212 6   1   11  11  11  .
.   200 6   11  1   1   1   1   1   6   11  1   1   11  11  .
.   .   11  11  11  11  1   1   1   11  1   1   1   11  .   .
.   .   .   11  11  1   11  11  1   11  11  11  11  .   .   .
.   .   .   .   .   11  11  11  11  200 212 .   .   .   .   .

• StdfToJson -- prints each Stdf record as a one-line JSON object for easy importing into other languages for further processing

Now the Bad News

Data.Stdf currently only parses the PRR record because that's all I needed. Well, the code is short and sweet so it won't be too much work to add support for some more interesting records. I can't think of why I'd bother with all of the rarely-used uninteresting ones. But maybe if I'm bored.