zircon/system/fidl/fuchsia-hardware-ftdi/ftdi.fidl

// 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.ftdi;

/// Each one of these represents an I2cDevice that will exist
/// on the newly created bus. The I2C bus will try and bind
/// a driver on the bus with the given VID, PID, DID.
struct I2cDevice {
    uint32 address;
    uint32 vid;
    uint32 pid;
    uint32 did;
};

/// This represents the data necessary for the FTDI device
/// to create an I2C bus.
struct I2cBusLayout {
    uint32 scl;
    /// The FTDI needs two pins to be able to drive input and output for
    /// SDA. Please specify the two pins here. They *must* be physically
    /// tied together on the board with a jumper wire.
    uint32 sda_out;
    uint32 sda_in;
};

[Layout = "Simple"]
protocol Device {
    /// Create an I2c bus on the FTDI device with a given `layout` and
    /// with `device` attached to it.
    CreateI2C(I2cBusLayout layout, I2cDevice device);
};