Function mraa_sys::mraa_spi_transfer_buf

pub unsafe extern "C" fn mraa_spi_transfer_buf(
    dev: mraa_spi_context, 
    data: *mut u8, 
    rxbuf: *mut u8, 
    length: c_int
) -> mraa_result_t

Transfer Buffer of bytes to the SPI device. Both send and recv buffers are passed in

@param dev The Spi context @param data to send @param rxbuf buffer to recv data back, may be NULL @param length elements within buffer, Max 4096 @return Result of operation