Add GATT Peripheral example for Pico W

pico-w-ble-peripheral-sdk/BTStack/Error.swift

@@ -0,0 +1,55 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift open source project
+//
+// Copyright (c) 2024 Apple Inc. and the Swift project authors.
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+//
+//===----------------------------------------------------------------------===//
+
+/// BTstack Error Code
+public struct BTStackError: Error, RawRepresentable, Equatable, Hashable, Sendable {
+
+    public let rawValue: Int32
+
+    public init(rawValue: Int32) {
+        self.rawValue = rawValue
+    }
+}
+
+public extension BTStackError {
+
+    init(_ hci: HCIError) {
+        self.init(rawValue: Int32(hci.rawValue))
+    }
+}
+
+public extension HCIError {
+
+    init?(_ error: BTStackError) {
+        guard error.rawValue <= UInt8.max else {
+            return nil
+        }
+        self.init(rawValue: UInt8(error.rawValue))
+    }
+}
+
+internal extension CInt {
+
+    func throwsError() throws(BTStackError) {
+        guard self == 0 else {
+            throw BTStackError(rawValue: self)
+        }
+    }
+}
+
+internal extension UInt8 {
+
+    func throwsError() throws(BTStackError) {
+        guard self == 0 else {
+            throw BTStackError(rawValue: numericCast(self))
+        }
+    }
+}

pico-w-ble-peripheral-sdk/BTStack/GAP.swift

@@ -0,0 +1,55 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift open source project
+//
+// Copyright (c) 2024 Apple Inc. and the Swift project authors.
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+//
+//===----------------------------------------------------------------------===//
+
+public extension HostController {
+
+    func setAdvertisementParameters(
+        advIntMin: UInt16 = 0x0030,
+        advIntMax: UInt16 = 0x0030,
+        advType: UInt8 = 0,
+        directAddressType: UInt8 = 0,
+        directAddress: BluetoothAddress = .zero,
+        channelMap: UInt8 = 0x07,
+        filterPolicy: UInt8 = 0x00
+    ) {
+        var directAddress = directAddress
+        withUnsafeMutablePointer(to: &directAddress.bytes) {
+            gap_advertisements_set_params(advIntMin, advIntMax, advType, directAddressType, $0, channelMap, filterPolicy)
+        }
+    }
+
+    var address: BluetoothAddress {
+        var address: BluetoothAddress = .zero
+        gap_local_bd_addr(&address.bytes)
+        return address.bigEndian
+    }
+}
+
+internal extension HostController {
+
+    func setAdvertisementData() {
+        let length = advertisement.length
+        advertisementBuffer = [UInt8](advertisement)
+        // data is not copied, pointer has to stay valid
+        gap_advertisements_set_data(length, &advertisementBuffer)
+    }
+
+    func setScanResponse() {
+        let length = scanResponse.length
+        scanResponseBuffer = [UInt8](scanResponse)
+        // data is not copied, pointer has to stay valid
+        gap_scan_response_set_data(length, &scanResponseBuffer)
+    }
+
+    func setAdvertisementState() {
+        gap_advertisements_enable(isAdvertising ? 1 : 0)
+    }
+}