bcm2835_spi_impl.h

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// Copyright (C) 2021 twyleg
#pragma once
 
#include "ispi.h"
 
#include "bcm2835.h"
 
class BcmSpi : public mfrc522::ISpi{
 
public:
    BcmSpi() {
        bcm2835_spi_begin();
        bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST);      // The default
        bcm2835_spi_setDataMode(BCM2835_SPI_MODE0);                   // The default
        bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_64);    // ~ 4 MHz
        bcm2835_spi_chipSelect(BCM2835_SPI_CS0);                      // The default
        bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS0, 0x00);      // the default
    }
 
    void write(char* pData, size_t len) final {
        bcm2835_spi_writenb(pData, len);
    }
 
    void read(char* pData, size_t len) final {
        bcm2835_spi_transfern(pData, len);
    }
 
    void writeRead(char* pData, size_t len) final {
        bcm2835_spi_transfern(pData, len);
    }
 
    char writeRead(char data) final {
        return bcm2835_spi_transfer(data);
    }
 
};