A BLE HID controller implementation with communication over SPI
Dependencies: BLE_API BLE_HID mbed nRF51822
main.cpp@0:f21dc3a04d62, 2017-12-13 (annotated)
- Committer:
- mrhannah
- Date:
- Wed Dec 13 05:34:15 2017 +0000
- Revision:
- 0:f21dc3a04d62
Initial/(final) changes for project
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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mrhannah | 0:f21dc3a04d62 | 1 | /* mbed Microcontroller Library |
mrhannah | 0:f21dc3a04d62 | 2 | * Copyright (c) 2015 ARM Limited |
mrhannah | 0:f21dc3a04d62 | 3 | * |
mrhannah | 0:f21dc3a04d62 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
mrhannah | 0:f21dc3a04d62 | 5 | * you may not use this file except in compliance with the License. |
mrhannah | 0:f21dc3a04d62 | 6 | * You may obtain a copy of the License at |
mrhannah | 0:f21dc3a04d62 | 7 | * |
mrhannah | 0:f21dc3a04d62 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mrhannah | 0:f21dc3a04d62 | 9 | * |
mrhannah | 0:f21dc3a04d62 | 10 | * Unless required by applicable law or agreed to in writing, software |
mrhannah | 0:f21dc3a04d62 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
mrhannah | 0:f21dc3a04d62 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
mrhannah | 0:f21dc3a04d62 | 13 | * See the License for the specific language governing permissions and |
mrhannah | 0:f21dc3a04d62 | 14 | * limitations under the License. |
mrhannah | 0:f21dc3a04d62 | 15 | */ |
mrhannah | 0:f21dc3a04d62 | 16 | |
mrhannah | 0:f21dc3a04d62 | 17 | #include "mbed.h" |
mrhannah | 0:f21dc3a04d62 | 18 | |
mrhannah | 0:f21dc3a04d62 | 19 | #include "ble/BLE.h" |
mrhannah | 0:f21dc3a04d62 | 20 | #include "ControllerService.h" |
mrhannah | 0:f21dc3a04d62 | 21 | #include "common.h" |
mrhannah | 0:f21dc3a04d62 | 22 | |
mrhannah | 0:f21dc3a04d62 | 23 | /** |
mrhannah | 0:f21dc3a04d62 | 24 | * This program implements a complete HID-over-Gatt Profile: |
mrhannah | 0:f21dc3a04d62 | 25 | * - HID is provided by ControllerServices |
mrhannah | 0:f21dc3a04d62 | 26 | * - Battery Service |
mrhannah | 0:f21dc3a04d62 | 27 | * - Device Information Service |
mrhannah | 0:f21dc3a04d62 | 28 | * |
mrhannah | 0:f21dc3a04d62 | 29 | */ |
mrhannah | 0:f21dc3a04d62 | 30 | |
mrhannah | 0:f21dc3a04d62 | 31 | DigitalOut waiting_led(LED1); |
mrhannah | 0:f21dc3a04d62 | 32 | DigitalOut connected_led(LED2); |
mrhannah | 0:f21dc3a04d62 | 33 | |
mrhannah | 0:f21dc3a04d62 | 34 | |
mrhannah | 0:f21dc3a04d62 | 35 | SPISlave arduino(p23, p22, p21, p24); // mosi, miso, sck, ssel |
mrhannah | 0:f21dc3a04d62 | 36 | DigitalOut arduino_int(p25); |
mrhannah | 0:f21dc3a04d62 | 37 | |
mrhannah | 0:f21dc3a04d62 | 38 | BLE ble; |
mrhannah | 0:f21dc3a04d62 | 39 | ControllerService *contServicePtr; |
mrhannah | 0:f21dc3a04d62 | 40 | |
mrhannah | 0:f21dc3a04d62 | 41 | static const char DEVICE_NAME[] = "puppeteerPro"; |
mrhannah | 0:f21dc3a04d62 | 42 | static const char SHORT_DEVICE_NAME[] = "pptPro"; |
mrhannah | 0:f21dc3a04d62 | 43 | |
mrhannah | 0:f21dc3a04d62 | 44 | static void onDisconnect(const Gap::DisconnectionCallbackParams_t *params) |
mrhannah | 0:f21dc3a04d62 | 45 | { |
mrhannah | 0:f21dc3a04d62 | 46 | HID_DEBUG("disconnected\r\n"); |
mrhannah | 0:f21dc3a04d62 | 47 | connected_led = 0; |
mrhannah | 0:f21dc3a04d62 | 48 | |
mrhannah | 0:f21dc3a04d62 | 49 | ble.gap().startAdvertising(); // restart advertising |
mrhannah | 0:f21dc3a04d62 | 50 | } |
mrhannah | 0:f21dc3a04d62 | 51 | |
mrhannah | 0:f21dc3a04d62 | 52 | static void onConnect(const Gap::ConnectionCallbackParams_t *params) |
mrhannah | 0:f21dc3a04d62 | 53 | { |
mrhannah | 0:f21dc3a04d62 | 54 | HID_DEBUG("connected\r\n"); |
mrhannah | 0:f21dc3a04d62 | 55 | waiting_led = false; |
mrhannah | 0:f21dc3a04d62 | 56 | } |
mrhannah | 0:f21dc3a04d62 | 57 | |
mrhannah | 0:f21dc3a04d62 | 58 | static void waiting() { |
mrhannah | 0:f21dc3a04d62 | 59 | if (!contServicePtr->isConnected()) { |
mrhannah | 0:f21dc3a04d62 | 60 | //connected_led = !connected_led; |
mrhannah | 0:f21dc3a04d62 | 61 | } |
mrhannah | 0:f21dc3a04d62 | 62 | else { |
mrhannah | 0:f21dc3a04d62 | 63 | //connected_led = 1; |
mrhannah | 0:f21dc3a04d62 | 64 | } |
mrhannah | 0:f21dc3a04d62 | 65 | } |
mrhannah | 0:f21dc3a04d62 | 66 | |
mrhannah | 0:f21dc3a04d62 | 67 | // Current system |
mrhannah | 0:f21dc3a04d62 | 68 | // arduino does slave select & interrupt |
mrhannah | 0:f21dc3a04d62 | 69 | // arduino transfers |
mrhannah | 0:f21dc3a04d62 | 70 | // ble hits isr & records current report |
mrhannah | 0:f21dc3a04d62 | 71 | void spi_receive() { |
mrhannah | 0:f21dc3a04d62 | 72 | static uint8_t byte_count = 0; |
mrhannah | 0:f21dc3a04d62 | 73 | static uint8_t current_report[6] = {0}; |
mrhannah | 0:f21dc3a04d62 | 74 | |
mrhannah | 0:f21dc3a04d62 | 75 | if(arduino.receive()) { |
mrhannah | 0:f21dc3a04d62 | 76 | waiting_led = !waiting_led; |
mrhannah | 0:f21dc3a04d62 | 77 | uint8_t resp = arduino.read(); |
mrhannah | 0:f21dc3a04d62 | 78 | |
mrhannah | 0:f21dc3a04d62 | 79 | if (resp == 0xFF) { |
mrhannah | 0:f21dc3a04d62 | 80 | byte_count = 0; |
mrhannah | 0:f21dc3a04d62 | 81 | memset(current_report, 0, sizeof(current_report)); |
mrhannah | 0:f21dc3a04d62 | 82 | } else { |
mrhannah | 0:f21dc3a04d62 | 83 | current_report[byte_count] = resp; |
mrhannah | 0:f21dc3a04d62 | 84 | byte_count++; |
mrhannah | 0:f21dc3a04d62 | 85 | |
mrhannah | 0:f21dc3a04d62 | 86 | if (byte_count == 6) { |
mrhannah | 0:f21dc3a04d62 | 87 | connected_led = !connected_led; |
mrhannah | 0:f21dc3a04d62 | 88 | contServicePtr->setReport(current_report); |
mrhannah | 0:f21dc3a04d62 | 89 | byte_count = 0; |
mrhannah | 0:f21dc3a04d62 | 90 | } |
mrhannah | 0:f21dc3a04d62 | 91 | } |
mrhannah | 0:f21dc3a04d62 | 92 | arduino.reply(0xAA); |
mrhannah | 0:f21dc3a04d62 | 93 | |
mrhannah | 0:f21dc3a04d62 | 94 | // finally trigger interrupt to signal receiving |
mrhannah | 0:f21dc3a04d62 | 95 | arduino_int = 0; |
mrhannah | 0:f21dc3a04d62 | 96 | wait_us(100); |
mrhannah | 0:f21dc3a04d62 | 97 | arduino_int = 1; |
mrhannah | 0:f21dc3a04d62 | 98 | wait_us(100); |
mrhannah | 0:f21dc3a04d62 | 99 | arduino_int = 0; |
mrhannah | 0:f21dc3a04d62 | 100 | } |
mrhannah | 0:f21dc3a04d62 | 101 | } |
mrhannah | 0:f21dc3a04d62 | 102 | |
mrhannah | 0:f21dc3a04d62 | 103 | int main() |
mrhannah | 0:f21dc3a04d62 | 104 | { |
mrhannah | 0:f21dc3a04d62 | 105 | Ticker heartbeat; |
mrhannah | 0:f21dc3a04d62 | 106 | |
mrhannah | 0:f21dc3a04d62 | 107 | HID_DEBUG("initialising ticker\r\n"); |
mrhannah | 0:f21dc3a04d62 | 108 | |
mrhannah | 0:f21dc3a04d62 | 109 | heartbeat.attach(waiting, 1); |
mrhannah | 0:f21dc3a04d62 | 110 | |
mrhannah | 0:f21dc3a04d62 | 111 | HID_DEBUG("initialising ble\r\n"); |
mrhannah | 0:f21dc3a04d62 | 112 | ble.init(); |
mrhannah | 0:f21dc3a04d62 | 113 | |
mrhannah | 0:f21dc3a04d62 | 114 | ble.gap().onDisconnection(onDisconnect); |
mrhannah | 0:f21dc3a04d62 | 115 | ble.gap().onConnection(onConnect); |
mrhannah | 0:f21dc3a04d62 | 116 | |
mrhannah | 0:f21dc3a04d62 | 117 | initializeSecurity(ble); |
mrhannah | 0:f21dc3a04d62 | 118 | |
mrhannah | 0:f21dc3a04d62 | 119 | HID_DEBUG("adding hid service\r\n"); |
mrhannah | 0:f21dc3a04d62 | 120 | ControllerService contService(ble); |
mrhannah | 0:f21dc3a04d62 | 121 | contServicePtr = &contService; |
mrhannah | 0:f21dc3a04d62 | 122 | |
mrhannah | 0:f21dc3a04d62 | 123 | HID_DEBUG("adding device info and battery service\r\n"); |
mrhannah | 0:f21dc3a04d62 | 124 | initializeHOGP(ble); |
mrhannah | 0:f21dc3a04d62 | 125 | |
mrhannah | 0:f21dc3a04d62 | 126 | HID_DEBUG("setting up gap\r\n"); |
mrhannah | 0:f21dc3a04d62 | 127 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::GAMEPAD); |
mrhannah | 0:f21dc3a04d62 | 128 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::COMPLETE_LOCAL_NAME, |
mrhannah | 0:f21dc3a04d62 | 129 | (const uint8_t *)DEVICE_NAME, sizeof(DEVICE_NAME)); |
mrhannah | 0:f21dc3a04d62 | 130 | ble.gap().accumulateAdvertisingPayload(GapAdvertisingData::SHORTENED_LOCAL_NAME, |
mrhannah | 0:f21dc3a04d62 | 131 | (const uint8_t *)SHORT_DEVICE_NAME, sizeof(SHORT_DEVICE_NAME)); |
mrhannah | 0:f21dc3a04d62 | 132 | |
mrhannah | 0:f21dc3a04d62 | 133 | ble.gap().setDeviceName((const uint8_t *)DEVICE_NAME); |
mrhannah | 0:f21dc3a04d62 | 134 | |
mrhannah | 0:f21dc3a04d62 | 135 | HID_DEBUG("advertising\r\n"); |
mrhannah | 0:f21dc3a04d62 | 136 | ble.gap().startAdvertising(); |
mrhannah | 0:f21dc3a04d62 | 137 | |
mrhannah | 0:f21dc3a04d62 | 138 | // Start interrupt sequence for SPI with Arduino |
mrhannah | 0:f21dc3a04d62 | 139 | Ticker spi_thread; |
mrhannah | 0:f21dc3a04d62 | 140 | connected_led = 1; |
mrhannah | 0:f21dc3a04d62 | 141 | arduino_int = 0; |
mrhannah | 0:f21dc3a04d62 | 142 | arduino.reply(0xAA); |
mrhannah | 0:f21dc3a04d62 | 143 | spi_thread.attach(spi_receive, 0.020); // 5ms ticker sequence |
mrhannah | 0:f21dc3a04d62 | 144 | |
mrhannah | 0:f21dc3a04d62 | 145 | |
mrhannah | 0:f21dc3a04d62 | 146 | while (true) { |
mrhannah | 0:f21dc3a04d62 | 147 | ble.waitForEvent(); |
mrhannah | 0:f21dc3a04d62 | 148 | } |
mrhannah | 0:f21dc3a04d62 | 149 | } |