Update: June 12, 06 The data logger implementation took a serious turn when we spent (hours) downloading data via a serial port. I now have a full implementation of 256 MB SD or MiniSD (or micro SD for that matter) data logger based on a SiLabs C8051F320. All communications with the micro are via USB.
Hardware consists of a voltage regulator to generate the 8051's 3.3V supply, RS-232 level shifter to allow communication with the AVR, a mini USB connector and a diode or setup to allow USB bus powered operation during download. The board layout can be very small if needed.
256MB is about the smallest SD cards you can get these days. You should expect logging times in the 180 hour range recording the Megatune compatible "A" data set at ten samples per second.
Anyone interested can contact me at lolachampcar dot com.
Bill
I am working with a friend to generate data recording capability on Win Mobile PDA platforms. Data will be stored in memory or in Fat16/32 on the PDA's memory card.
Update: Jan 17,06 Writing to memory or card done. Serial comms done. Looking at V3.3 data dump commands or SIPR interface. Should be testing both within a day.
History
SerialComm/SIPR should be uptodate (and apparently complete). For the config positions, parsing global.h is necessary. In the future, slcan packet-wrapping will be the standard ("Mac" command), that allows multiple devices on the bus. But implementing sipr first is a good idea, you will be able to upgrade easily.
Tonight, a updated user friendly megatune package with firmare will be releases, 1.0.30, with simple .bat files for firmware upgrade through serial port
Q: What language are you planning on writting the WinMobileLogger in? I am a MS developer and would be interested in helping out, I ( 66.237.129.3 near Cleveland, USA who actually?) was planning on writting something myself if someone else hadn't already started.
- is it reasonable to use any other language than C / C++ ?
A: MembersPage/DickSafier . I have been doing C# .NET development exclusively for past 2-3 years so happen to find it much quicker to write in then C/C++ personally, but its always a matter of personal preference.
Some work in C must be done and my programmer must come up to speed with it. Are you developing outside your interests? If so, please provide email contact information via my web site at www.lolachampcar.com. Thanks, Bill
Notes from Michael (developer of SIPR) I can make several C++ source files available with an impementation of SIPR. Should be trivial to adapt them to your uses as I already have data logging working in my copy of psituner. hackish at gmail dot com is the best way to get ahold of me.