![]() However you might need to reconfigure the parallel port pins corresponding to the data lines (MISO, MOSI, SCK and RST). They are quite easy to build and can also be used for UART communications between your PC and the microcontroller.Įdit: You can use ProgISP software to see if it works with your board, which supports parallel port programming (if you can find a motherboard with LPT port of course). They are typically based on FTDI FT232RL USB to serial converter. You can buy an ISP programmer, which are extremely cheap these days, and wire it directly to the microcontroller pins.Īnother alternative would be to use a bit-bang programmer. Parallel to USB converters do exist, but I don't think they are worth the trouble. ![]() ![]() In fact, it looks pretty much like 74HC244. I don't think that this chip (with erased markings) does anything clever.
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