| // 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 ddk.protocol.spi; |
| |
| using zx; |
| |
| [Layout = "ddk-protocol"] |
| protocol Spi { |
| /// Half-duplex transmit data to a SPI device; always transmits the entire buffer on success. |
| Transmit(vector<uint8> txdata) -> (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> rxdata); |
| /// Full-duplex SPI transaction. Received data will exactly equal the length of the transmit |
| /// buffer. |
| Exchange(vector<uint8> txdata) -> (zx.status status, vector<uint8> rxdata); |
| }; |