Profile cover photo
Profile photo
Steven Stallion
78 followers
78 followers
About
Steven's posts

Post has attachment
Only a few boards left - If you're interested in picking one up, now is the time!

Post has attachment
I've finally made it through the remaining documentation (and even have a few units ready to ship). Cheers!

Post has attachment
After a slight shipping delay the boards are in. Assembly was smooth and the finished board tested perfectly. Even at minimum tolerances, OSH Park did a beautiful job on the PCB.

I'm  finishing documentation now. If folks are interested, I'll setup a store on Tindie. I'm thinking these will go for 45 USD assembled and tested. I've verified the software on Linux and Mac OS. Windows may require a little elbow grease, but should work with WinUSB.
Photo

Post has attachment
I've just finished the last piece of software for the programmer. Just in time too - the boards will be here tomorrow!

Post has attachment
+Erik Quanstrom Protocol documentation is up!

Post has attachment
Initial performance results are in. I'm glad I took the time to add support for paged writes. A 256Kbit EEPROM will take over 5 minutes using the (compatible) byte write method. Paged writes come in at a touch over 5 seconds.

+Edward Cashin I ended up with a cgo package to interface with libusb: https://github.com/sstallion/go/tree/master/eeprom. I'm quite happy with the result!

Post has attachment
The first board revision is submitted. The final dimensions are 0.9 x 3.25". This was the perfect excuse to give OSH Park a try. I can't wait to see the results!
Photo

Post has attachment
It surprises me sometimes how much longer it takes to write proper documentation than it does to just wire things up. On the plus side, I've finalized the BOM. The downside? 3M ZIF sockets are damned near 20 USD a pop.

Post has attachment
Getting closer!
Photo

Post has attachment
First revision of the firmware is done. Both byte and paged writes are supported along with chip erase. I'm tempted to convert the testing tool I wrote in C to Go for the final version. Thoughts?
Wait while more posts are being loaded