sen data via radio to other microbits accept command via radio bufixes
Dependencies: BLE_API nRF51822 mbed-dev-bin
Diff: source/bluetooth/MicroBitDFUService.cpp
- Revision:
- 1:8aa5cdb4ab67
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/source/bluetooth/MicroBitDFUService.cpp Thu Apr 07 01:33:22 2016 +0100 @@ -0,0 +1,137 @@ +/* +The MIT License (MIT) + +Copyright (c) 2016 British Broadcasting Corporation. +This software is provided by Lancaster University by arrangement with the BBC. + +Permission is hereby granted, free of charge, to any person obtaining a +copy of this software and associated documentation files (the "Software"), +to deal in the Software without restriction, including without limitation +the rights to use, copy, modify, merge, publish, distribute, sublicense, +and/or sell copies of the Software, and to permit persons to whom the +Software is furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL +THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. +*/ + +/** + * Class definition for a MicroBit Device Firmware Update loader. + * + * This is actually just a frontend to a memory resident nordic DFU loader. + * + * We rely on the BLE standard pairing processes to provide encryption and authentication. + * We assume any device that is paied with the micro:bit is authorized to reprogram the device. + * + */ +#include "MicroBitConfig.h" +#include "MicroBitDFUService.h" +#include "ble/UUID.h" +#include "MicroBitConfig.h" + +#if !defined(__arm) +#pragma GCC diagnostic ignored "-Wunused-function" +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wunused-parameter" +#endif + +/* + * The underlying Nordic libraries that support BLE do not compile cleanly with the stringent GCC settings we employ + * If we're compiling under GCC, then we suppress any warnings generated from this code (but not the rest of the DAL) + * The ARM cc compiler is more tolerant. We don't test __GNUC__ here to detect GCC as ARMCC also typically sets this + * as a compatability option, but does not support the options used... + */ +extern "C" { +#include "dfu_app_handler.h" +} + +/* + * Return to our predefined compiler settings. + */ +#if !defined(__arm) +#pragma GCC diagnostic pop +#endif + + +/** + * Constructor. + * Initialise the Device Firmware Update service. + * @param _ble The instance of a BLE device that we're running on. + */ +MicroBitDFUService::MicroBitDFUService(BLEDevice &_ble) : + ble(_ble) +{ + // Opcodes can be issued here to control the MicroBitDFU Service, as defined above. + GattCharacteristic microBitDFUServiceControlCharacteristic(MicroBitDFUServiceControlCharacteristicUUID, &controlByte, 0, sizeof(uint8_t), + GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE); + + controlByte = 0x00; + + // Set default security requirements + microBitDFUServiceControlCharacteristic.requireSecurity(SecurityManager::MICROBIT_BLE_SECURITY_LEVEL); + + GattCharacteristic *characteristics[] = {µBitDFUServiceControlCharacteristic}; + GattService service(MicroBitDFUServiceUUID, characteristics, sizeof(characteristics) / sizeof(GattCharacteristic *)); + + ble.addService(service); + + microBitDFUServiceControlCharacteristicHandle = microBitDFUServiceControlCharacteristic.getValueHandle(); + + ble.gattServer().write(microBitDFUServiceControlCharacteristicHandle, &controlByte, sizeof(uint8_t)); + ble.gattServer().onDataWritten(this, &MicroBitDFUService::onDataWritten); +} + +/** + * Callback. Invoked when any of our attributes are written via BLE. + */ +void MicroBitDFUService::onDataWritten(const GattWriteCallbackParams *params) +{ + if (params->handle == microBitDFUServiceControlCharacteristicHandle) + { + if(params->len > 0 && params->data[0] == MICROBIT_DFU_OPCODE_START_DFU) + { + // TODO: Raise a SYSTEM event here. + //uBit.display.stopAnimation(); + //uBit.display.clear(); + +#if CONFIG_ENABLED(MICROBIT_DBG) + printf(" ACTIVATING BOOTLOADER.\n"); +#endif + + // Perform an explicit disconnection to assist our peer to reconnect to the DFU service + ble.disconnect(Gap::REMOTE_DEV_TERMINATION_DUE_TO_POWER_OFF); + + wait_ms(1000); + + // Call bootloader_start implicitly trough a event handler call + // it is a work around for bootloader_start not being public in sdk 8.1 + ble_dfu_t p_dfu; + ble_dfu_evt_t p_evt; + + p_dfu.conn_handle = params->connHandle; + p_evt.ble_dfu_evt_type = BLE_DFU_START; + + dfu_app_on_dfu_evt(&p_dfu, &p_evt); + } + } +} + + +/** + * UUID definitions for BLE Services and Characteristics. + */ +const uint8_t MicroBitDFUServiceUUID[] = { + 0xe9,0x5d,0x93,0xb0,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8 +}; + +const uint8_t MicroBitDFUServiceControlCharacteristicUUID[] = { + 0xe9,0x5d,0x93,0xb1,0x25,0x1d,0x47,0x0a,0xa0,0x62,0xfa,0x19,0x22,0xdf,0xa9,0xa8 +};