blob: 3ef03b1d25b3b547ede225cc16df4932b6e5ec0b [file] [log] [blame]
// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
library fuchsia.hardware.spi;
using zx;
const uint32 MAX_TRANSFER_SIZE = 8196; // arbitrary - to be removed
protocol Device {
/// Half-duplex transmit data to a SPI device; always transmits the entire buffer on success.
Transmit(vector<uint8>:MAX_TRANSFER_SIZE data) -> (zx.status status);
/// Half-duplex receive data from a SPI device; always reads the full size requested.
Receive(uint32 size) -> (zx.status status, vector<uint8>:MAX_TRANSFER_SIZE data);
/// Full-duplex SPI transaction. Received data will exactly equal the length of the transmit
/// buffer.
Exchange(vector<uint8>:MAX_TRANSFER_SIZE txdata) -> (zx.status status,
vector<uint8>:MAX_TRANSFER_SIZE rxdata);