2017-04-12 00:03:23 +00:00
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Howdy y'all,
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This is a side project of mine to build a replacement circuit board
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2017-11-02 21:48:12 +00:00
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for the Casio 3208 module, used in the Casio CA-53W and CA-506
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calculator watches. It is not compatible with the 3228 module used in
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the Databank watches, which have four external buttons instead of two.
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As a side project, it has no warranty whatsoever and you shouldn't use
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it for anything.
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2017-04-12 00:03:23 +00:00
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In the rare case that you find this project to be useful, you owe me a
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pint of good, hoppy pale ale. All license to use this project is
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revoked if you try to pass off a pilsner instead.
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2017-12-13 20:53:38 +00:00
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In addition to the source code, there is handy documentation in the
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[wiki](https://github.com/travisgoodspeed/goodwatch/wiki) and a
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general interest website at [goodwatch.org](https://goodwatch.org/).
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2017-09-01 17:48:08 +00:00
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2017-04-12 00:03:23 +00:00
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73 from Pizza Rat City,
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--Travis
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2017-09-01 17:48:08 +00:00
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2017-09-29 19:11:45 +00:00
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## Software Status
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Our firmware is freely available in this repository, compiling with
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the standard MSP430 compiler packages that ship with Debian. It
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consists of a Clock, a Stopwatch, an RPN Calculator, and a Hex Memory
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2017-11-02 21:48:12 +00:00
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Viewer with Disassembler, all written in C. It compiles in Debian
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2017-12-12 16:12:45 +00:00
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with all of the MSP430 packages installed.
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On watches with a radio, we have a basic Morse transmitter and GFSK
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beacon transceiver for now, with other radio applications on the way.
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The radio is accessible from a host computer over the UART for
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building base stations and repeaters, or for rapidly prototyping
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radio applications in Python.
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2017-09-29 19:11:45 +00:00
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Additionally, we've written out own client for the CC430's BootStrap
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Loader (BSL). You might find it handy for other projects involving
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2017-11-02 21:48:12 +00:00
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that chip, or other MSP430F5 and MSP430F6 chips without USB. You will
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need to be a member of the `dialout` group to flash the firmware.
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2017-09-29 19:11:45 +00:00
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2017-11-14 21:00:57 +00:00
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[Firmware documentation](http://goodwatch.org/doxygen/) can be built
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with Doxygen.
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2017-09-01 17:48:08 +00:00
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## Hardware Status
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2017-09-29 19:11:45 +00:00
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Our replacement board is based around the CC430F6137, which combines
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2017-09-01 17:48:08 +00:00
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an MSP430 microcontroller with an LCD controller and a sub-GHz radio.
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2017-12-12 16:12:45 +00:00
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The initial version, the GoodWatch10, lacks a radio but supports all
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other features, such as the RPN calculator, hex editor, and
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disassembler. Assembly of the GoodWatch10 is no longer recommended,
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as the PCB requires a bit of whittling to fit the case.
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2017-09-01 17:48:08 +00:00
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2017-12-12 16:12:45 +00:00
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The GoodWatch20 is now our primary target, featuring minor corrections
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to layout and a functional radio. The radio is in active use, and the
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filter chain is verified to work.
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2017-11-19 21:20:04 +00:00
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The GoodWatch21 will be manufactured in early 2018 with a wider filter
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and other radio modifications.
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2017-09-01 17:48:08 +00:00
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2017-11-02 21:48:12 +00:00
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See `BOM.txt` in the hardware directories for a parts list, and the
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wiki for an assembly guide.
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2017-12-12 16:12:45 +00:00
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## Related Projects
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[Pluto](https://github.com/carrotIndustries/pluto) is a replacement
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PCB for the Casio F-91W that is also based on an MSP430. We are
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jealous of that project's simulator and energy monitor utility.
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