Prechin C51

#1 · July 4, 2025, 7:10 am

Hi All,

I have some fun with SimulIDE and a development kit I bought a few years ago:

Kit

But never really got to it. I try to make the examples in SimulIde.

This is the first one with the ledmatrix, including assembly source, hex file, sim file, libre office ledmatrix encoder, etc.

It works in the real C51. I'm not that good coder, don't expect anything fancy. :).

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#2 · July 15, 2025, 7:48 pm

Hi all

I wanted to get the LCD working in the Pechin board, that was a bit of a strugle. It's easy in SimulIDE but in real hardware the timing is critical.

It seems that reading the LCD for busy is not really used, everyone uses delay. I tried to program it but it would not work in real hardware.

Anyways LCD, customchar, Keys 1-4 work and a timer experiment.

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#3 · August 1, 2025, 7:03 am

Hi all,

This time I got the DS18B20 working on the prechin board, it only does positive temp and it automatically rounds the temperature :).

The assembly got LCD, DSB20, Hex2dec and Hex2ascii routines.

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