Bowen Feng
HID-over-GATT implementation with the BLE API. This library allows to create devices such as mouse, keyboard or joystick, over Bluetooth Low Energy.
Dependents: Seeed_Tiny_BLE_FTHR_Peripheral
Fork of
BLE_HID
by 
Jean-Philippe Brucker
KeyboardService.h@2:3d9adb26bdc5, 2015-10-29 (annotated)
- Committer:
- Jean-Philippe Brucker
- Date:
- Thu Oct 29 16:48:26 2015 +0000
- Revision:
- 2:3d9adb26bdc5
- Parent:
- 1:7a6c2e2c9371
Version 0.2
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 1 | /* mbed Microcontroller Library |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 2 | * Copyright (c) 2015 ARM Limited |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 3 | * |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 5 | * you may not use this file except in compliance with the License. |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 6 | * You may obtain a copy of the License at |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 7 | * |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 9 | * |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 10 | * Unless required by applicable law or agreed to in writing, software |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 13 | * See the License for the specific language governing permissions and |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 14 | * limitations under the License. |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 15 | */ |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 16 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 17 | #include <errno.h> |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 18 | #include "mbed.h" |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 19 | #include "CircularBuffer.h" |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 20 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 21 | #include "HIDServiceBase.h" |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 22 | #include "Keyboard_types.h" |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 23 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 24 | /* TODO: make this easier to configure by application (e.g. as a template parameter for |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 25 | * KeyboardService) */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 26 | #ifndef KEYBUFFER_SIZE |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 27 | #define KEYBUFFER_SIZE 256 |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 28 | #endif |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 29 | |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 30 | /** |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 31 | * Report descriptor for a standard 101 keys keyboard, following the HID specification example: |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 32 | * - 8 bytes input report (1 byte for modifiers and 6 for keys) |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 33 | * - 1 byte output report (LEDs) |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 34 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 35 | report_map_t KEYBOARD_REPORT_MAP = { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 36 | USAGE_PAGE(1), 0x01, // Generic Desktop Ctrls |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 37 | USAGE(1), 0x06, // Keyboard |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 38 | COLLECTION(1), 0x01, // Application |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 39 | USAGE_PAGE(1), 0x07, // Kbrd/Keypad |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 40 | USAGE_MINIMUM(1), 0xE0, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 41 | USAGE_MAXIMUM(1), 0xE7, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 42 | LOGICAL_MINIMUM(1), 0x00, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 43 | LOGICAL_MAXIMUM(1), 0x01, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 44 | REPORT_SIZE(1), 0x01, // 1 byte (Modifier) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 45 | REPORT_COUNT(1), 0x08, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 46 | INPUT(1), 0x02, // Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 47 | REPORT_COUNT(1), 0x01, // 1 byte (Reserved) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 48 | REPORT_SIZE(1), 0x08, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 49 | INPUT(1), 0x01, // Const,Array,Abs,No Wrap,Linear,Preferred State,No Null Position |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 50 | REPORT_COUNT(1), 0x05, // 5 bits (Num lock, Caps lock, Scroll lock, Compose, Kana) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 51 | REPORT_SIZE(1), 0x01, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 52 | USAGE_PAGE(1), 0x08, // LEDs |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 53 | USAGE_MINIMUM(1), 0x01, // Num Lock |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 54 | USAGE_MAXIMUM(1), 0x05, // Kana |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 55 | OUTPUT(1), 0x02, // Data,Var,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 56 | REPORT_COUNT(1), 0x01, // 3 bits (Padding) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 57 | REPORT_SIZE(1), 0x03, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 58 | OUTPUT(1), 0x01, // Const,Array,Abs,No Wrap,Linear,Preferred State,No Null Position,Non-volatile |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 59 | REPORT_COUNT(1), 0x06, // 6 bytes (Keys) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 60 | REPORT_SIZE(1), 0x08, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 61 | LOGICAL_MINIMUM(1), 0x00, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 62 | LOGICAL_MAXIMUM(1), 0x65, // 101 keys |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 63 | USAGE_PAGE(1), 0x07, // Kbrd/Keypad |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 64 | USAGE_MINIMUM(1), 0x00, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 65 | USAGE_MAXIMUM(1), 0x65, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 66 | INPUT(1), 0x00, // Data,Array,Abs,No Wrap,Linear,Preferred State,No Null Position |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 67 | END_COLLECTION(0), |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 68 | }; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 69 | |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 70 | /// "keys pressed" report |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 71 | static uint8_t inputReportData[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 72 | /// "keys released" report |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 73 | static const uint8_t emptyInputReportData[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 74 | /// LEDs report |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 75 | static uint8_t outputReportData[] = { 0 }; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 76 | |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 77 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 78 | /** |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 79 | * @class KeyBuffer |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 80 | * |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 81 | * Buffer used to store keys to send. |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 82 | * Internally, it is a CircularBuffer, with the added capability of putting the last char back in, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 83 | * when we're unable to send it (ie. when BLE stack is busy) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 84 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 85 | class KeyBuffer: public CircularBuffer<uint8_t, KEYBUFFER_SIZE> |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 86 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 87 | public: |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 88 | KeyBuffer() : |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 89 | CircularBuffer(), |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 90 | dataIsPending (false), |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 91 | keyUpIsPending (false) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 92 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 93 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 94 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 95 | /** |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 96 | * Mark a character as pending. When a freshly popped character cannot be sent, because the |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 97 | * underlying stack is busy, we set it as pending, and it will get popped in priority by @ref |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 98 | * getPending once reports can be sent again. |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 99 | * |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 100 | * @param data The character to send in priority. The second keyUp report is implied. |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 101 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 102 | void setPending(uint8_t data) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 103 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 104 | MBED_ASSERT(dataIsPending == false); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 105 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 106 | dataIsPending = true; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 107 | pendingData = data; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 108 | keyUpIsPending = true; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 109 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 110 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 111 | /** |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 112 | * Get pending char. Either from the high priority buffer (set with setPending), or from the |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 113 | * circular buffer. |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 114 | * |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 115 | * @param data Filled with the pending data, when present |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 116 | * @return true if data was filled |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 117 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 118 | bool getPending(uint8_t &data) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 119 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 120 | if (dataIsPending) { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 121 | dataIsPending = false; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 122 | data = pendingData; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 123 | return true; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 124 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 125 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 126 | return pop(data); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 127 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 128 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 129 | bool isSomethingPending(void) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 130 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 131 | return dataIsPending || keyUpIsPending || !empty(); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 132 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 133 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 134 | /** |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 135 | * Signal that a keyUp report is pending. This means that a character has successfully been |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 136 | * sent, but the subsequent keyUp report failed. This report is of highest priority than the |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 137 | * next character. |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 138 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 139 | void setKeyUpPending(void) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 140 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 141 | keyUpIsPending = true; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 142 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 143 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 144 | /** |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 145 | * Signal that no high-priority report is pending anymore, we can go back to the normal queue. |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 146 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 147 | void clearKeyUpPending(void) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 148 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 149 | keyUpIsPending = false; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 150 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 151 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 152 | bool isKeyUpPending(void) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 153 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 154 | return keyUpIsPending; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 155 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 156 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 157 | protected: |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 158 | bool dataIsPending; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 159 | uint8_t pendingData; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 160 | bool keyUpIsPending; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 161 | }; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 162 | |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 163 | |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 164 | /** |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 165 | * @class KeyboardService |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 166 | * @brief HID-over-Gatt keyboard service |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 167 | * |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 168 | * Send keyboard reports over BLE. Users should rely on the high-level functions provided by the |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 169 | * Stream API. Because we can't send batches of HID reports, we store pending keys in a circular |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 170 | * buffer and rely on the report ticker to spread them over time. |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 171 | * |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 172 | * @code |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 173 | * BLE ble; |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 174 | * KeyboardService kbd(ble); |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 175 | * |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 176 | * void once_connected_and_paired_callback(void) |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 177 | * { |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 178 | * // Sequentially send keys 'Shift'+'h', 'e', 'l', 'l', 'o', '!' and <enter> |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 179 | * kbd.printf("Hello!\n"); |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 180 | * } |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 181 | * @endcode |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 182 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 183 | class KeyboardService : public HIDServiceBase, public Stream |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 184 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 185 | public: |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 186 | KeyboardService(BLE &_ble) : |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 187 | HIDServiceBase(_ble, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 188 | KEYBOARD_REPORT_MAP, sizeof(KEYBOARD_REPORT_MAP), |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 189 | inputReport = emptyInputReportData, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 190 | outputReport = outputReportData, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 191 | featureReport = NULL, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 192 | inputReportLength = sizeof(inputReportData), |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 193 | outputReportLength = sizeof(outputReportData), |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 194 | featureReportLength = 0, |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 195 | reportTickerDelay = 24), |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 196 | failedReports(0) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 197 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 198 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 199 | |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 200 | virtual void onConnection(const Gap::ConnectionCallbackParams_t *params) |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 201 | { |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 202 | HIDServiceBase::onConnection(params); |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 203 | |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 204 | /* Drain buffer, in case we've been disconnected while transmitting */ |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 205 | if (!reportTickerIsActive && keyBuffer.isSomethingPending()) |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 206 | startReportTicker(); |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 207 | } |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 208 | |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 209 | virtual void onDisconnection(const Gap::DisconnectionCallbackParams_t *params) |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 210 | { |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 211 | stopReportTicker(); |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 212 | HIDServiceBase::onDisconnection(params); |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 213 | } |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 214 | |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 215 | /** |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 216 | * Send raw report. Should only be called by sendCallback. |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 217 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 218 | virtual ble_error_t send(const report_t report) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 219 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 220 | static unsigned int consecutiveFailures = 0; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 221 | ble_error_t ret = HIDServiceBase::send(report); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 222 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 223 | /* |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 224 | * Wait until a buffer is available (onDataSent) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 225 | * TODO. This won't work, because BUSY error is not only returned when we're short of |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 226 | * notification buffers, but in other cases as well (e.g. when disconnected). We need to |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 227 | * find a reliable way of knowing when we actually need to wait for onDataSent to be called. |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 228 | if (ret == BLE_STACK_BUSY) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 229 | stopReportTicker(); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 230 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 231 | if (ret == BLE_STACK_BUSY) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 232 | consecutiveFailures++; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 233 | else |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 234 | consecutiveFailures = 0; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 235 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 236 | if (consecutiveFailures > 20) { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 237 | /* |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 238 | * We're not transmitting anything anymore. Might as well avoid overloading the |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 239 | * system in case it can magically fix itself. Ticker will start again on next _putc |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 240 | * call, or on next connection. |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 241 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 242 | stopReportTicker(); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 243 | consecutiveFailures = 0; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 244 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 245 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 246 | return ret; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 247 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 248 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 249 | /** |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 250 | * Send an empty report, representing keyUp event |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 251 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 252 | ble_error_t keyUpCode(void) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 253 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 254 | return send(emptyInputReportData); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 255 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 256 | |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 257 | /** |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 258 | * Send a character, defined by a modifier (CTRL, SHIFT, ALT) and the key |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 259 | * |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 260 | * @param key Character to send (as defined in USB HID Usage Tables) |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 261 | * @param modifier Optional modifiers (logical OR of enum MODIFIER_KEY) |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 262 | * |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 263 | * @returns BLE_ERROR_NONE on success, or an error code otherwise. |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 264 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 265 | ble_error_t keyDownCode(uint8_t key, uint8_t modifier) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 266 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 267 | inputReportData[0] = modifier; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 268 | inputReportData[2] = keymap[key].usage; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 269 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 270 | return send(inputReportData); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 271 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 272 | |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 273 | /** |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 274 | * Push a key on the internal FIFO |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 275 | * |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 276 | * @param c ASCII character to send |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 277 | * |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 278 | * @returns 0 on success, or ENOMEM when the FIFO is full. |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 279 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 280 | virtual int _putc(int c) { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 281 | if (keyBuffer.full()) { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 282 | return ENOMEM; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 283 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 284 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 285 | keyBuffer.push((unsigned char)c); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 286 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 287 | if (!reportTickerIsActive) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 288 | startReportTicker(); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 289 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 290 | return 0; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 291 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 292 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 293 | uint8_t lockStatus() { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 294 | // TODO: implement numlock/capslock/scrolllock |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 295 | return 0; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 296 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 297 | |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 298 | /** |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 299 | * Pop a key from the internal FIFO, and attempt to send it over BLE |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 300 | * |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 301 | * keyUp reports should theoretically be sent after every keyDown, but we optimize the |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 302 | * throughput by only sending one when strictly necessary: |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 303 | * - when we need to repeat the same key |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 304 | * - when there is no more key to report |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 305 | * |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 306 | * In case of error, put the key event back in the buffer, and retry on next tick. |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 307 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 308 | virtual void sendCallback(void) { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 309 | ble_error_t ret; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 310 | uint8_t c; |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 311 | static uint8_t previousKey = 0; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 312 | |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 313 | if (keyBuffer.isSomethingPending() && !keyBuffer.isKeyUpPending()) { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 314 | bool hasData = keyBuffer.getPending(c); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 315 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 316 | /* |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 317 | * If something is pending and is not a keyUp, getPending *must* return something. The |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 318 | * following is only a sanity check. |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 319 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 320 | MBED_ASSERT(hasData); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 321 | |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 322 | if (!hasData) |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 323 | return; |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 324 | |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 325 | if (previousKey == c) { |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 326 | /* |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 327 | * When the same key needs to be sent twice, we need to interleave a keyUp report, |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 328 | * or else the OS won't be able to differentiate them. |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 329 | * Push the key back into the buffer, and continue to keyUpCode. |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 330 | */ |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 331 | keyBuffer.setPending(c); |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 332 | } else { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 333 | ret = keyDownCode(c, keymap[c].modifier); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 334 | if (ret) { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 335 | keyBuffer.setPending(c); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 336 | failedReports++; |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 337 | } else { |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 338 | previousKey = c; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 339 | } |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 340 | |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 341 | return; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 342 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 343 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 344 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 345 | ret = keyUpCode(); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 346 | if (ret) { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 347 | keyBuffer.setKeyUpPending(); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 348 | failedReports++; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 349 | } else { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 350 | keyBuffer.clearKeyUpPending(); |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 351 | previousKey = 0; |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 352 | |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 353 | /* Idle when there is nothing more to send */ |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 354 | if (!keyBuffer.isSomethingPending()) |
| Jean-Philippe Brucker |
2:3d9adb26bdc5 | 355 | stopReportTicker(); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 356 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 357 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 358 | |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 359 | /** |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 360 | * Restart report ticker if it was disabled, after too many consecutive failures. |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 361 | * |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 362 | * This is called by the BLE stack. |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 363 | * |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 364 | * @param count Number of reports (notifications) sent |
| Jean-Philippe Brucker |
1:7a6c2e2c9371 | 365 | */ |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 366 | virtual void onDataSent(unsigned count) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 367 | { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 368 | if (!reportTickerIsActive && keyBuffer.isSomethingPending()) |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 369 | startReportTicker(); |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 370 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 371 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 372 | unsigned long failedReports; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 373 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 374 | protected: |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 375 | virtual int _getc() { |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 376 | return 0; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 377 | } |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 378 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 379 | protected: |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 380 | KeyBuffer keyBuffer; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 381 | |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 382 | //GattCharacteristic boot_keyboard_input_report; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 383 | //GattCharacteristic boot_keyboard_output_report; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 384 | }; |
| Jean-Philippe Brucker |
0:cfd70fa91663 | 385 |