Rc-522


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  1. #1
    Prolific Poster towlerg's Avatar
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    Default Rc-522

    Ages ago I got one of these RFID modules
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    it would appear to have SPI, I2C and async. Does anybody know how to select the interface?
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    George.

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    Fanatical Contributor top204's Avatar
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    Default Re: Rc-522

    Looking at the datasheet, pin 1 of the MFRC522 chip selects an I2C interface, but it is not brought to the outside world on the PCB. USART and SPI are on seperate pins, but the USART is not brought to the outside world either on the PCB, so it is only SPI with that particualr PCB layout, so some inexplicable reason!

    However, SPI is extremely easy to use with standard Proton, with either the Shin/Shout commands or create some procedures that perform SPI_Write and SPI_Read, then build other procedures that manipulate the read and write procedures.

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    Prolific Poster towlerg's Avatar
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    Default Re: Rc-522

    Les, you obviously have seen this board before, odd that both SPI and I2C appear to be brought out to the 8 pin connector.
    George.

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