firefly_conductor/README

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this micro-controller firmware controls a vacuum fluorescent display (VFD).
the VFD has been salvaged from a Samsung SER6500 cash register.
it already included supertex HV518 VFD drivers.
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the micro-controller used is a STM32F103C8T6.
the software uses the libopencm3 library.
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the firmware starts by testing all segments of the VFD, plays an animation, and finally displays the text typed in over the USB CDC ACM or USART1 ports.
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the data is shifted out from the micro-controller to the drivers using SPI.
a timer will periodically refresh all parts of the VFD.
more details are available at https://wiki.cuvoodoo.info/doku.php?id=vfd_driver.