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Dongle decode

Started by See_Mos, Sep 09, 2024, 10:23 AM

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See_Mos

#20
To start with I need to use something that I have in the drawer--18F25K22, 18F25K50, 18f14K50, 16F1718 and the FRAM MB25RS64.

The PIC will not have to do anything else so I don't need any of the internal peripherals.

Because of the irregular timing bit-banging is probably the only way.

This picture shows the strange bits where the data from the PC changes twice but the clock does not.

JonW

can you post the latest capture? 

See_Mos

I'll give it a go

Opened OK

JonW

That worked this time

See_Mos

To save messing about interfacing different voltage levels I just ordered some FM25640 which are five volt compatible, the MB85RS64 is only 3V7 max.