Backcountry Business
Since a few people asked, I’ve posted the source code for the Backcountry Logger. In a first for me, the source is offered with a specific license. In this case, it’s the Creative Commons BY-NC-SA 3.0 license. I feel a bit…
Steve
Tiny CPU Update
Slow progress continues on the assembly and first boot-up of Tiny CPU. The photo shows a sample program written in Tiny CPU assembly language, drawing a color pattern on the LCD. The serial port and keyboard interface haven’t yet been…
Backcountry Logger Bill of Materials
The first Backcountry Logger prototype has gotten a very positive response from everyone I’ve showed it too, so I’m toying with the idea of making a few and selling them. I put together a bill of materials to estimate the…
JTAG, EXTEST, and hair loss
Oof. See that window to the left? That’s the result of 10 hours of debugging effort on bring-up for my custom Tiny CPU board. What you see is UrJTAG connected to the JTAG interface of the Max II CPLD, and successfully…
Soldering, with Profanity
Hot diggety damn! I believe I’ve successfully soldered the Max II in its cruel 100-pin package with 0.5 mm pin spacing. At least, I’ve assembled enough of the board to connect it to a JTAG programmer, program an LED blinky…
Tiny CPU Boards
The Tiny CPU boards arrived yesterday from Seeed Studio’s Fusion PCB service. Now it’s time to break out my soldering iron again, and get busy with that 0.5 mm pitch 100-pin TQFP. Ugh! I placed the order with Seeed on…
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