pub unsafe extern "C" fn atSHA(
ca_cmd: ATCACommand,
packet: *mut ATCAPacket,
write_context_size: u16,
) -> ATCA_STATUSpub unsafe extern "C" fn atSHA(
ca_cmd: ATCACommand,
packet: *mut ATCAPacket,
write_context_size: u16,
) -> ATCA_STATUS