SPI with adxl345

[rushin]

hello there i want to interface adxl345 with nrf51822 using SPI interface i am new to spi. i am using spi master with spi slave example. i want to write 0x08 in 0x32 register then in function

spi_send_recv(m_tx_data, m_rx_data, TX_RX_BUF_LENGTH);

should i write

m_tx_data= {0x32,0x08}

what should i do?? if i want to read register 0x33??

[bjorn-spockeli]

Take a look at the SPI driver I made for the ADXL375.

Driver Files:

main.c

ADXL375_SPI.c

ADXL375_SPI.h

-Bjørn

[rushin]

hi thanks for its working

[rushin]

but explain me why we are doing this??

  if(bytes > 1)
    {
        m_tx_data_spi = (0x80|address)|0x40;
    }
    else
    {
        m_tx_data_spi = 0x80|address;
    }

[bjorn-spockeli]

If you are reading to more than one register you have to set the Multiple-Byte bit in the first byte transfer.

[rushin]

why addres is ored with 0x80 and 0x40??