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PIN Connection to PI

Former Member

Please provide a specification which of the pins need actually be connected for the NFC reader in it's default configuration (SPI). I would like to connect another addon that is based on the UART, which is not used but within the 26 PIN header blocked by the NFC reader.

 

Thanks.

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  • 0

    found in sw3693\linux\shared\phhwConfig.h

    #ifdef NXPBUILD__PHHAL_HW_RC523 //Explore-NFC board

     

    #if BOARD == RaspberryPi_Rev1_Pinout

    #define SPI_CONFIG           "0:0:0" //PN512 is connected to SPI bus 0, CS pin 0, no busy pin

    #define PIN_CS_IN           0

    #define PIN_IRQ               23

    #define PIN_NRST           7

     

     

    #elif BOARD == RaspberryPi_Rev2_Pinout

    #define SPI_CONFIG           "0:0:0" //PN512 is connected to SPI bus 0, CS pin 0, no busy pin

    #define PIN_CS_IN           2

    #define PIN_IRQ               23

    #define PIN_NRST           7

     

     

    #endif

     

    #endif /* NXPBUILD__PHHAL_HW_RC523 */

     

    # during initialisation directions are set

    ret = gpio_set_direction(PIN_CS_IN, false);

    ret = gpio_set_direction(PIN_IRQ, false);

    ret = gpio_set_direction(PIN_NRST, true);

    • SPI: 19,21,23,24 (CS0)
    • PIN_CS_IN 2 (BCM numbering)
    • PIN_NRST 7 (BCM numbering)
    • Does it use 3.3V power only or also 5V?

    Is that correct? Can someone tell if PIN_CS_IN and PIN_NRST use the wiring PIN numbering (and would then map to GPIO2 / physical 13, GPIO7 / physical 7?

    > from the schematic below the numbers used in the code are BCM

  • 0 in reply to Former Member

    Hi Max,

     

    I don't have this board but there is a full schematic here, you can see the 26-way connector at the bottom, marked with all signals and voltages.

    EXPLORE NFC Board Schematic

  • 0 in reply to shabaz

    Perfect. I'll find out if it works with it's i2c lines not conneted.

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