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Uart Laser Based SS

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Hey all, wanted use the MSP430 launchpad for a simple for a hoby based security system project. Please forgive my incompetence, i'm still sadly a student. Ideally I wanted to send serial through a laser and receive it via a buffered LED sensor feeding back to the MSP430. I would then compare sent versus the received and if the same, the alarm wouldn't be triggered.

 

Among many issues I see the main issue with this is timing. If i'm bit banging serial how am I going to check my received bits? Any ideas how to go about this? Ideally i'd just like to use 1 MSP430g2231.

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I would suggest creating an SPI based shift register that happens to have your sensors at the output and the input of the SPI ports.

 

Shift out a sequence of bytes and check the sequence as they come right back in.

 

Your idea is not far off of commercial products that I've seen and heard of.

:thumbup:

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