苹果MFi外设固件规范R42详解

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"MFi Accessory Firmware Specification Release R42 是苹果公司发布的一份关于MFi（Made for iPhone/iPod/iPad）配件开发的详细技术文档，版本为R42，适用于2010年。这份文档对开发苹果授权配件的开发者来说具有很高的参考价值。文档内容涵盖机械、电子、摄影复制、录音等多种形式的信息，但需遵循苹果的版权规定，仅限个人使用和存储。此外，文档还警告未经许可使用苹果商标可能涉及商标侵权和不公平竞争的法律问题。尽管提供了这些信息，但文档明确表示不授予任何技术的明示或暗示许可证，苹果保留与所描述技术相关的所有知识产权。" "MFi Accessory Firmware Specification Release R42" 提供了开发苹果认证配件所需的技术规格和指南，包括但不限于以下关键知识点： 1. **MFi认证**：MFi计划是苹果对外部硬件配件制造商的授权项目，确保配件与苹果设备的兼容性和安全性。开发者需要遵循MFi标准来设计和制造产品，以获得苹果的官方认可。 2. **Firmware规范**：文档详细阐述了配件固件的要求，这包括固件的更新机制、错误处理、安全特性以及如何与iOS设备通信等。 3. **兼容性测试**：为了确保配件能够无缝地与iPhone、iPod和iPad配合工作，开发者需要了解并遵循苹果设定的兼容性测试流程，确保产品的功能和性能满足苹果的标准。 4. **硬件接口**：文档会详细描述配件与苹果设备之间的物理连接方式，如Lightning接口或者旧版的30-pin接口的电气和机械规范，以及数据传输协议。 5. **版权与法律**：开发者必须遵守苹果的版权规定，不得非法复制或传播文档内容，同时，使用苹果的商标（如苹果logo）需要得到苹果的正式许可。 6. **知识产权**：苹果保留所有技术的知识产权，这意味着开发者不能擅自使用文档中描述的技术，除非得到明确授权。 7. **开发工具和过程**：文档可能包含了开发工具的使用指南、软件开发套件(SDK)的介绍以及整个开发和认证流程的概述。 8. **安全和隐私**：苹果非常重视用户的安全和隐私，因此，配件的固件必须符合苹果的安全标准，防止恶意软件和数据泄露。 9. **质量控制**：开发者需要遵循苹果的质量控制标准，以确保最终产品的质量和用户满意度。通过深入学习和理解这份文档，开发者可以创建出符合苹果严格标准的配件产品，从而进入苹果设备的生态系统，提供与苹果设备兼容的高质量配件。

Table 2-16 ACK packet reporting dropped data 84

Table 2-17 RequestRemoteUIMode packet 85

Table 2-18 ReturnRemoteUIMode packet 86

Table 2-19 EnterRemoteUIMode packet 87

Table 2-20 ExitRemoteUIMode packet 87

Table 2-21 RequestiPodName packet 88

Table 2-22 ReturniPodName packet 88

Table 2-23 RequestiPodSoftwareVersion packet 89

Table 2-24 ReturniPodSoftwareVersion packet 89

Table 2-25 RequestiPodSerialNum packet 90

Table 2-26 ReturniPodSerialNum packet 90

Table 2-27 RequestiPodModelNum packet 91

Table 2-28 ReturniPodModelNum packet 92

Table 2-29 Apple device model number strings M8948-M9974 and P8948-P9830 92

Table 2-30 Apple device model number strings MA002/PA002 and higher 93

Table 2-31 RequestLingoProtocolVersion packet 98

Table 2-32 ReturnLingoProtocolVersion packet 98

Table 2-33 RequestTransportMaxPacketSize packet 99

Table 2-34 ReturnTransportMaxPacketSize packet 100

Table 2-35 IdentifyDeviceLingoes packet 101

Table 2-36 Device Lingoes Spoken bits 102

Table 2-37 IdentifyDeviceLingoes Options bits 102

Table 2-38 GetDevAuthenticationInfo packet 104

Table 2-39 RetDevAuthenticationInfo packet, Authentication 1.0 104

Table 2-40 RetDevAuthenticationInfo packet, Authentication 2.0 105

Table 2-41 AckDevAuthenticationInfo packet 106

Table 2-42 GetDevAuthenticationSignature packet 107

Table 2-43 RetDevAuthenticationSignature packet 108

Table 2-44 AckDevAuthenticationStatus packet 108

Table 2-45 GetiPodAuthenticationInfo packet 109

Table 2-46 RetiPodAuthenticationInfo packet 109

Table 2-47 AckiPodAuthenticationInfo packet 110

Table 2-48 GetiPodAuthenticationSignature packet 111

Table 2-49 RetiPodAuthenticationSignature packet 112

Table 2-50 AckiPodAuthenticationStatus packet 112

Table 2-51 NotifyiPodStateChange packet 113

Table 2-52 GetiPodOptions packet 114

Table 2-53 RetiPodOptions packet 114

Table 2-54 Accessory Info Type values 116

Table 2-55 GetAccessoryInfo packet with Accessory Info Type = 0x00-0x01, 0x04-0x09, or

0x0B 116

Table 2-56 GetAccessoryInfo packet with Accessory Info Type = 0x03 117

Table 2-57 Accessory Info Type values for RetAccessoryInfo 118

Table 2-58 RetAccessoryInfo packet with Accessory Info Type = 0x00 118

Table 2-59 Accessory info capabilities bit field 119

Table 2-60 RetAccessoryInfo packet with Accessory Info Type = 0x01/0x06/0x07/0x08 120

FIGURES, TABLES, AND LISTINGS

Table 2-61 RetAccessoryInfo packet with Accessory Info Type = 0x03 120

Table 2-62 RetAccessoryInfo packet with Accessory Info Type = 0x04/0x05 121

Table 2-63 RetAccessoryInfo packet with Accessory Info Type = 0x09 121

Table 2-64 RetAccessoryInfo packet with Accessory Info Type = 0x0B 122

Table 2-65 Accessory status values 122

Table 2-66 GetiPodPreferences packet 123

Table 2-67 Apple device preference class and setting IDs 123

Table 2-68 RetiPodPreferences packet 128

Table 2-69 SetiPodPreferences packet 129

Table 2-70 GetUIMode packet 129

Table 2-71 RetUIMode packet 130

Table 2-72 User interface mode values 130

Table 2-73 SetUIMode packet 131

Table 2-74 StartIDPS packet 132

Table 2-75 SetFIDTokenValues packet 133

Table 2-76 FIDTokenValues field format 133

Table 2-77 FIDTokenValues tokens 134

Table 2-78 IdentifyToken format 135

Table 2-79 DeviceOptions bits in IdentifyToken 135

Table 2-80 AccCapsToken format 136

Table 2-81 Accessory capabilities bit values 136

Table 2-82 AccInfoToken format 137

Table 2-83 Accessory Info Type values 137

Table 2-84 Accessory RF certifications 138

Table 2-85 iPodPreferenceToken format 138

Table 2-86 EAProtocolToken format 139

Table 2-87 BundleSeedIDPrefToken format 139

Table 2-88 EAProtocolMetadataToken format 139

Table 2-89 MetadataType values 140

Table 2-90 ScreenInfoToken format 140

Table 2-91 Accessory screen features 141

Table 2-92 RetFIDTokenValueACKs packet 141

Table 2-93 Acknowledgment format for IdentifyToken 142

Table 2-94 Acknowledgment status codes 142

Table 2-95 Acknowledgment format for AccCapsToken 143

Table 2-96 Acknowledgment format for AccInfoToken 143

Table 2-97 Acknowledgment format for IpodPreferenceToken 143

Table 2-98 Acknowledgment format for EAProtocolToken 143

Table 2-99 Acknowledgment format for BundleSeedIDPrefToken 144

Table 2-100 Acknowledgment format for EAProtocolMetadataToken 144

Table 2-101 Acknowledgment format for MicCapsToken 144

Table 2-102 Acknowledgment format for ScreenInfoToken 144

Table 2-103 Acknowledgment status codes 145

Table 2-104 EndIDPS packet 145

Table 2-105 accEndIDPSStatus values 146

Table 2-106 IDPSStatus packet 147

FIGURES, TABLES, AND LISTINGS

Table 2-107 Apple device actions in response to accEndIDPSStatus and IDPS status 147

Table 2-108 OpenDataSessionForProtocol packet 148

Table 2-109 CloseDataSession packet 149

Table 2-110 DevACK packet 150

Table 2-111 DevDataTransfer small packet 151

Table 2-112 DevDataTransfer large packet 152

Table 2-113 iPodDataTransfer small packet 153

Table 2-114 iPodDataTransfer large packet 154

Table 2-115 SetAccStatusNotification packet 155

Table 2-116 RetAccStatusNotification packet 156

Table 2-117 AccessoryStatusNotification packet 157

Table 2-118 Accessory status types 157

Table 2-119 Accessory status parameters (fault) 157

Table 2-120 Accessory fault types 157

Table 2-121 Accessory fault conditions 158

Table 2-122 Sample IDPS process and accessory status notification commands 158

Table 2-123 SetEventNotification packet 160

Table 2-124 Notification bitmask bits 161

Table 2-125 iPodNotification packet for Flow Control Notifications 162

Table 2-126 iPodNotification packet for Radio Tagging Notifications 163

Table 2-127 iPodNotification payload for Radio Tagging notifications 164

Table 2-128 iPodNotification packet for Camera notifications 164

Table 2-129 iPodNotification payload for Camera Notifications 164

Table 2-130 iPodNotification packet for NowPlayingFocusApp notifications 165

Table 2-131 iPodNotification packet for Session Space Available notifications 165

Table 2-132 iPodNotification packet for Database Available notifications 166

Table 2-133 iPodNotification packet for Command Complete notifications 166

Table 2-134 iPodNotification packet for USB Host mode charging notifications 167

Table 2-135 InfoType values for USB Host mode charging notifications 167

Table 2-136 Charging Info values for iPodNotification 168

Table 2-137 GetiPodOptionsForLingo packet 168

Table 2-138 RetiPodOptionsForLingo packet 169

Table 2-139 RetiPodOptionsForLingo option bits 169

Table 2-140 Sample GetiPodOptionsForLingo and RetiPodOptionsForLingo commands 173

Table 2-141 GetEventNotification packet 178

Table 2-142 RetEventNotification packet 179

Table 2-143 GetSupportedEventNotification packet 180

Table 2-144 CancelCommand packet 180

Table 2-145 RetSupportedEventNotification packet 181

Table 2-146 SetAvailableCurrent packet 182

Table 2-147 RequestApplicationLaunch packet 183

Table 2-148 GetNowPlayingFocusApp packet 184

Table 2-149 RetNowPlayingFocusApp packet 184

FIGURES, TABLES, AND LISTINGS

Chapter 3

Accessory Lingoes 187

Figure 3-1 Typical digital audio transactions between an Apple device and an accessory 354

Figure 3-2 A USB host recovers from a CRC16 error 357

Table 3-1 iPod accessory lingoes 187

Table 3-2 Select Apple device command timings 188

Table 3-3 Simple remote lingo command summary 189

Table 3-4 Simple remote lingo support versions 191

Table 3-5 Simple Remote lingo command history 191

Table 3-6 5G nano camera modes and transitions 194

Table 3-7 Suggested accessory feedback indications 195

Table 3-8 iPod camera interface commands 196

Table 3-9 Sample video control commands, accessory on and off 197

Table 3-10 Sample video control commands, iPod on and accessory off 200

Table 3-11 USB HID commands 201

Table 3-12 USB HID Consumer Page controls supported by iOS 201

Table 3-13 Simple Remote lingo accessibility commands 202

Table 3-14 ContextButtonStatus packet 202

Table 3-15 Button states 203

Table 3-16 ACK packet 204

Table 3-17 Command status codes 205

Table 3-18 VideoButtonStatus packet 206

Table 3-19 Video-specific button values 206

Table 3-20 AudioButtonStatus packet 207

Table 3-21 Audio-specific button values 208

Table 3-22 iPodOutButtonStatus packet 209

Table 3-23 iPod Out control locations 210

Table 3-24 iPod Out button status values 210

Table 3-25 RotationInputStatus packet 211

Table 3-26 Wheel types 212

Table 3-27 Rotation directions 212

Table 3-28 Rotation actions 212

Table 3-29 Rotation types 212

Table 3-30 RadioButtonStatus packet 215

Table 3-31 CameraButtonStatus packet 216

Table 3-32 RegisterDescriptor packet 216

Table 3-33 Country codes 217

Table 3-34 SendHIDReportToiPod packet 219

Table 3-35 SendHIDReportToAcc packet 220

Table 3-36 UnregisterDescriptor packet 220

Table 3-37 AccessibilityEvent packet 221

Table 3-38 AccessibilityEvent events and data 221

Table 3-39 GetAccessibilityParameter packet 223

Table 3-40 RetAccessibilityParameter packet 224

Table 3-41 Accessibility parameter types and values 224

Table 3-42 SetAccessibilityParameter packet 225

FIGURES, TABLES, AND LISTINGS

Table 3-43 GetCurrentItemProperty packet 226

Table 3-44 RetCurrentItemProperty packet 226

Table 3-45 Currently selected item property types and values 227

Table 3-46 SetContext packet 228

Table 3-47 User interface contexts 228

Table 3-48 DevACK packet 228

Table 3-49 Display Remote lingo command summary 230

Table 3-50 Display Remote lingo command history 231

Table 3-51 ACK packet 233

Table 3-52 Command result values 233

Table 3-53 GetCurrentEQProfileIndex packet 234

Table 3-54 RetCurrentEQProfileIndex packet 234

Table 3-55 SetCurrentEQProfileIndex packet 235

Table 3-56 GetNumEQProfiles packet 236

Table 3-57 RetNumEQProfiles packet 236

Table 3-58 GetIndexedEQProfileName packet 237

Table 3-59 RetIndexedEQProfileName packet 238

Table 3-60 SetRemoteEventNotification packet 238

Table 3-61 Apple device events 239

Table 3-62 RemoteEventNotification packet 240

Table 3-63 Event notification data 241

Table 3-64 Play status values 245

Table 3-65 Shuffle state 245

Table 3-66 Repeat state 245

Table 3-67 Power and battery state 246

Table 3-68 Audiobook playback speeds 246

Table 3-69 GetRemoteEventStatus packet 247

Table 3-70 RetRemoteEventStatus packet 247

Table 3-71 GetiPodStateInfo packet 248

Table 3-72 infoType values 248

Table 3-73 GetiPodStateInfo packet to retrieve the Apple device Equalizer Setting 249

Table 3-74 RetiPodStateInfo packet 250

Table 3-75 RetiPodStateInfo packet for requesting chapter information 250

Table 3-76 SetiPodStateInfo packet 251

Table 3-77 Apple device state data 252

Table 3-78 Restore-on-exit values 255

Table 3-79 SetiPodStateInfo packet for setting the current track 255

Table 3-80 GetPlayStatus packet 256

Table 3-81 RetPlayStatus packet 257

Table 3-82 SetCurrentPlayingTrack packet 258

Table 3-83 GetIndexedPlayingTrackInfo packet 258

Table 3-84 RetIndexedPlayingTrackInfo packet 259

Table 3-85 Track information data 260

Table 3-86 GetNumPlayingTracks packet 262

Table 3-87 RetNumPlayingTracks packet 262

Table 3-88 GetArtworkFormats packet 263

FIGURES, TABLES, AND LISTINGS

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