A custom soft-CPU implemented in a small CPLD.
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…
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…
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…
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…
Sometimes it seems like there are a million different LCDs you might use with your microcontroller project, and deciding on one can be hard. Once you’re ready to move beyond a basic text display, you’ll find graphic displays have a…
The Tiny CPU board design is now off to the board house for manufacturing. The three week wait begins. Somewhere during that time, the Backcountry Logger boards should come back too. I selected Seeed Studio’s Fusion PCB service, because it…
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