87 lines
2.3 KiB
Swift
87 lines
2.3 KiB
Swift
import Foundation
|
|
|
|
enum BluetoothRequest {
|
|
/**
|
|
* Request the number of bytes already recorded
|
|
*
|
|
* Request:
|
|
* - No additional bytes expected
|
|
*
|
|
* Response:
|
|
* - `BluetoothResponseType.success`
|
|
* - the number of recorded bytes as a `Uint16` (2 bytes)
|
|
* - the number of seconds until the next measurement as a `Uint16` (2 bytes)
|
|
* - the number of seconds between measurements as a `Uint16` (2 bytes)
|
|
* - the number of measurements as a `Uint16` (2 bytes)
|
|
* - the maximum number of bytes to request as a `Uint16` (2 bytes)
|
|
* - the number of seconds since power on as a `Uint32` (4 bytes)
|
|
*/
|
|
case getInfo
|
|
|
|
/**
|
|
* Request recording data
|
|
*
|
|
* Request:
|
|
* - Bytes 1-2: Memory offset (`UInt16`)
|
|
* - Bytes 3-4: Number of bytes (`UInt16`)
|
|
*
|
|
* Response:
|
|
* - `BluetoothResponseType.success`, plus the requested bytes
|
|
* - `BluetoothResponseType.responseTooLarge` if too many bytes are requested
|
|
*/
|
|
case getRecordingData(offset: Int, count: Int)
|
|
|
|
/**
|
|
* Request deletion of recordings
|
|
*
|
|
* Request:
|
|
* - Bytes 1-2: Number of bytes to clear (uint16_t)
|
|
*
|
|
* Response:
|
|
* - `BluetoothResponseType.success`
|
|
* - `BluetoothResponseType.invalidNumberOfBytesToDelete`, if the number of bytes does not match.
|
|
* This may happen when a new temperature recording is performed in between calls
|
|
*/
|
|
case clearRecordingBuffer(byteCount: Int)
|
|
|
|
var serialized: Data {
|
|
let firstByte = Data([byte])
|
|
switch self {
|
|
case .getInfo:
|
|
return firstByte
|
|
case .getRecordingData(let offset, let count):
|
|
return firstByte + count.twoByteData + offset.twoByteData
|
|
case .clearRecordingBuffer(let byteCount):
|
|
return firstByte + byteCount.twoByteData
|
|
}
|
|
}
|
|
|
|
var byte: UInt8 {
|
|
switch self {
|
|
case .getInfo: return 0
|
|
case .getRecordingData: return 1
|
|
case .clearRecordingBuffer: return 2
|
|
}
|
|
}
|
|
}
|
|
|
|
private extension Int {
|
|
|
|
var twoByteData: Data {
|
|
let value = UInt16(clamping: self)
|
|
return Data([value.low, value.high])
|
|
}
|
|
}
|
|
|
|
private extension UInt16 {
|
|
|
|
var low: UInt8 {
|
|
UInt8(self & 0xFF)
|
|
}
|
|
|
|
var high: UInt8 {
|
|
UInt8((self >> 8) & 0xFF)
|
|
}
|
|
}
|
|
|