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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2017-09-12 11:53:13 +00:00
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for the Casio 3208 module, used in the Casio CA-53W and related
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2017-09-12 17:25:34 +00:00
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calculator watches. It is probably not compatible with the 3228
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module used in the Databank watches, which have four external buttons
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instead of two. As a side project, it has no warranty whatsoever and
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you shouldn't use 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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2017-09-01 17:48:08 +00:00
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This project is not yet public, but it will eventually be open source.
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Please give me time to verify it first.
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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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Viewer, all written in C.
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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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that chip, or other MSP430F5 and MSP430F6 chips without USB.
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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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The initial version, the GoodWatch10, lacks a filter chain for the
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radio and is only useful for verifying the correctness of the
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2017-09-29 19:11:45 +00:00
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non-radio portion of the design. The design is confirmed to be
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functional, and Travis is wearing one for daily use.
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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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Assembly of the GoodWatch10 is a bit difficult, as components are 0201
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wherever possible and the central chip is QFN. We'll be correcting
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this by switching to 0402 parts for the GoodWatch20, at the same time
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that we add a Sub-GHz radio and chip antenna.
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2017-09-01 17:48:08 +00:00
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