I want to transfer the following C codes to B4J, but I don't know how to transfer those bcm2835_spi_XXXX? 
B4X:
if (!bcm2835_init())
{
printf("bcm2835_init failed. Are you running as root ?\n");
return false;
}
//Setup SPI pins
if (!bcm2835_spi_begin())
{
printf("bcm2835_spi_begin failed. Are you running as root ?\n");
return false;
}
// Set SPI bit order
bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST);
// Set SPI data mode
// BCM2835_SPI_MODE0 = 0, // CPOL = 0, CPHA = 0, Clock idle low, data is clocked in on rising edge, output data (change) on falling edge
// BCM2835_SPI_MODE1 = 1, // CPOL = 0, CPHA = 1, Clock idle low, data is clocked in on falling edge, output data (change) on rising edge
// BCM2835_SPI_MODE2 = 2, // CPOL = 1, CPHA = 0, Clock idle high, data is clocked in on falling edge, output data (change) on rising edge
// BCM2835_SPI_MODE3 = 3, // CPOL = 1, CPHA = 1, Clock idle high, data is clocked in on rising, edge output data (change) on falling edge
bcm2835_spi_setDataMode(BCM2835_SPI_MODE0);
// Set SPI clock speed
// BCM2835_SPI_CLOCK_DIVIDER_65536 = 0, ///< 65536 = 262.144us = 3.814697260kHz (total H+L clock period)
// BCM2835_SPI_CLOCK_DIVIDER_32768 = 32768, ///< 32768 = 131.072us = 7.629394531kHz
// BCM2835_SPI_CLOCK_DIVIDER_16384 = 16384, ///< 16384 = 65.536us = 15.25878906kHz
// BCM2835_SPI_CLOCK_DIVIDER_8192 = 8192, ///< 8192 = 32.768us = 30/51757813kHz
// BCM2835_SPI_CLOCK_DIVIDER_4096 = 4096, ///< 4096 = 16.384us = 61.03515625kHz
// BCM2835_SPI_CLOCK_DIVIDER_2048 = 2048, ///< 2048 = 8.192us = 122.0703125kHz
// BCM2835_SPI_CLOCK_DIVIDER_1024 = 1024, ///< 1024 = 4.096us = 244.140625kHz
// BCM2835_SPI_CLOCK_DIVIDER_512 = 512, ///< 512 = 2.048us = 488.28125kHz
// BCM2835_SPI_CLOCK_DIVIDER_256 = 256, ///< 256 = 1.024us = 976.5625MHz
// BCM2835_SPI_CLOCK_DIVIDER_128 = 128, ///< 128 = 512ns = = 1.953125MHz
// BCM2835_SPI_CLOCK_DIVIDER_64 = 64, ///< 64 = 256ns = 3.90625MHz
// BCM2835_SPI_CLOCK_DIVIDER_32 = 32, ///< 32 = 128ns = 7.8125MHz
// BCM2835_SPI_CLOCK_DIVIDER_16 = 16, ///< 16 = 64ns = 15.625MHz
// BCM2835_SPI_CLOCK_DIVIDER_8 = 8, ///< 8 = 32ns = 31.25MHz
// BCM2835_SPI_CLOCK_DIVIDER_4 = 4, ///< 4 = 16ns = 62.5MHz
// BCM2835_SPI_CLOCK_DIVIDER_2 = 2, ///< 2 = 8ns = 125MHz, fastest you can get
// BCM2835_SPI_CLOCK_DIVIDER_1 = 1, ///< 1 = 262.144us = 3.814697260kHz, same as 0/65536
bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_16);
//Disable management of CS pin we will do it
bcm2835_spi_chipSelect(BCM2835_SPI_CS_NONE);
//Set CS pins polarity to low
//bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS0, LOW);
// Set the pin to be an output (CS pin)
bcm2835_gpio_fsel(SCS_, BCM2835_GPIO_FSEL_OUTP);
inline static void SPI_TransferTx (unsigned char Data) // macro for the SPI transfer
{ //
bcm2835_spi_transfer(Data); //
}; //
//
inline static void SPI_TransferTxLast (unsigned char Data) //
{ //
bcm2835_spi_transfer(Data); //
}; //
//
inline static unsigned char SPI_TransferRx (unsigned char Data)//
{ //
return bcm2835_spi_transfer(Data); //
};