Function wpilib_sys::bindings::HAL_TransactionSPI

pub unsafe extern "C" fn HAL_TransactionSPI(
    port: Type, 
    dataToSend: *const u8, 
    dataReceived: *mut u8, 
    size: i32
) -> i32

Performs an SPI send/receive transaction.

This is a lower-level interface to the spi hardware giving you more control over each transaction.

@param port The number of the port to use. 0-3 for Onboard CS0-CS2, 4 for MXP @param dataToSend Buffer of data to send as part of the transaction. @param dataReceived Buffer to read data into. @param size Number of bytes to transfer. [0..7] @return Number of bytes transferred, -1 for error