Commit graph

224 commits

Author SHA1 Message Date
Joe Finney e1f75b2c4c microbit: Added read capability to MicroBitDFUService::ControlPoint characteristic
Whilst Android devices permit explicit initiation of the BLE pairing process,
IOS based devices are only  capable of implicit initiation of pairing based
on accessing a protected characteristic. Adding read capability to the
ControlPoint characteristic provides a safe and convenient way for IOS devices
to initiate pairing.
2016-01-04 23:41:22 +00:00
Joe Finney 7a71b58bd4 microbit: Revert explicit use of public addresses in pairing mode 2016-01-04 23:06:48 +00:00
Joe Finney 203246b975 WIP: Revert to public addresses pending further debug 2015-12-18 12:27:08 +00:00
Joe Finney c7ea0af6fe WIP: Analysing correct use of private resolvable addresses 2015-12-17 14:27:57 +00:00
Joe Finney 14831ac9b9 Updates to BLE 2.1.11 / ble-nrf51822 2.2.3
Minor amends:
  - bleDisconnectionCallback signature change
  - bleSetAdvertisingInterval now takes milliseconds as a parameter
  - event based invocation of DFU bootloader
2015-12-11 04:57:06 +00:00
Joe Finney 6d610f049a microbit: Updates to Pairing Mode to improve the user experience
More specifically:

- BLUEZONE mode renamed to PairingMode (by popular request).
- Added timeout of 90 seconds before automatic device reboot.
- Move from a scroll to a print based algorithm to improve the amount of time key is displayed fully.
- Added compulsory 'click to bond' button press.
- Improved response time of tick/cross being displayed.
2015-12-11 03:43:18 +00:00
Joe Finney 5a9f5d42bd microbit: Updates to enable anonymous advertising during normal operation
Changes to default BLE name. During normal operation, all micro:bits now have the same name: BBC micro:bit
When pairing mode (AKA BLUEZONE) is entered, device name details re appended as before, to give BBC micro:bit [<name>]

This is to provide a degree of anonymity to users, to make tracking of kids more difficult.
2015-12-11 02:09:31 +00:00
Joe Finney e042a55522 microbit: Added compile time option to enabe support for BLE private resolvable addresses.
Introduced MICROBIT_BLE_PRIVATE_ADDRESSES configuration option.
Disabled by default, as it did not resolve binds correctly on Android 4.4.2
2015-12-11 01:38:22 +00:00
Joe Finney 6f5ad99aa2 BUGFIX: Enabled BLE_COMMON_OPT_RADIO_CPU_MUTEX option
This option is now configured when the BLE stack is initialised. This ensures that SoftDevice is never
starved of CPU during periods of criticality. This does lock out the CPU for application use, but prevents
MIC failures caused by __disable_irq() operations (as found in the mbed Ticker API for example).
2015-12-11 01:16:48 +00:00
Joe Finney b6ca1365f7 microbit: Added explicit BLE disconnection requests on DFU and soft reset 2015-12-11 00:55:33 +00:00
Joe Finney 1e5d5c8dcf Updates to BLE 2.1.11 / ble-nrf51822 2.2.3
Minor amends:
  - bleDisconnectionCallback signature change
  - bleSetAdvertisingInterval now takes milliseconds as a parameter
  - event based invocation of DFU bootloader
2015-12-11 00:24:21 +00:00
Joe Finney 1b18ac8641 microbit: Added basic gesture recognition into MicroBitAccelerometer
The following postures of the device are now detected:
- TILT_UP
- TILT_DOWN
- TILT_LEFT
- TILT_RIGHT
- FACE_UP
- FACE_DOWN

In addition, the following gestures are inferred:

- NONE
- SHAKE
- FREEFALL
- WHEEE (>=3g)
- SICK (>=5g)
- UNCONSCIOUS (>=8g)

Events are now triggered on the MessageBus upon the transition from one posture/gesture to another,
and a synchronous getGesture() method is now also provided to interogate the last gesture recognised.

I should be noted that the default accelerator range of +/-2g will be insufficient to detect some of
the events noted above, and MicroBitAccelerometer::setRange() should be used to increase the range
if required.
2015-12-03 15:11:31 +00:00
Joe Finney f5cf8f2dd4 microbit: Minor optimisations to patch
- LFSR generated values in a subset of the range requested (rounded to the nearest lower power of 2).
   Corrected by increasing the number of bits usedby one, such that it now generated st least the power of 2 greater.

 - replaced enable/disable of interrupts with a local snapshot of randomValue. Much of the nordic software is sensitive to interrupt timings,
   so best avoided where possible. Chance of race condition is low, and effect is minimal (duplicate number returned).
2015-11-30 00:43:24 +00:00
Joe Finney 958136673f Merge branch 'fix-random' of https://github.com/remay/microbit-dal into remay-fix-random 2015-11-29 23:43:46 +00:00
Joe Finney ae93079a65 code cleanup 2015-11-25 21:21:04 +00:00
Joe Finney 6d1004fb28 Updates to DFU service to align with BLE standard BLE security
- Removed flashcode base authorization
- silenced unused parameter in MicroBitHeapAllocator
- bugfixed BLUEZONE mode so that sensor data is still available via BLE
2015-11-20 11:32:42 +00:00
Robert May 051575d911 Tidy up gcc -Wall fixes. 2015-11-18 23:13:57 +00:00
Robert May de681e68c3 Add diagnostic message to yotta/cmake output to remind us that we have silenced warnings. 2015-11-18 23:04:59 +00:00
Robert May 6c330079b1 Remove unnecessary uBit.serial.baud() calls
The serial baud rate is set duing construction of the uBit object.  We
don't need to do it again, and especially with fixed values that can't
be overridden.
2015-11-18 22:50:19 +00:00
Robert May 5333729644 Revert "Cchange random() to use libc srand()/rand()"
This reverts commit db5227872a.

return to using our own random implementation.
2015-11-18 15:50:44 +00:00
Robert May db5227872a Cchange random() to use libc srand()/rand()
Uisng libc's implementation is likely to be safer than rolling our own.  At least
the failure modes are well documented. (glibc's implementation of rand() is
actually not bad).
2015-11-18 14:15:17 +00:00
Robert May 1bb4377c8c Combine loops and fix max returned value. 2015-11-18 12:08:34 +00:00
Michal Moskal 845bf4838c Fix allocation size for ImageData (the header is 6, not 4 bytes long) 2015-11-17 15:57:19 -08:00
Robert May 901faaeec7 reset variable m in the correct place. 2015-11-17 18:51:10 +00:00
Robert May 892689c54a Fix Microbit::random() to be random
The LFSR used only provides 1 bit of random data each time it is cycled.
This implementation generates the minimum number of bits needed.  Further
it discards numbers that are bigger than required and re-calculates -
this keeps the distribution flat.
2015-11-17 18:33:34 +00:00
Joe Finney b44095f0c5 BUGFIX: String comparison operations
Corrected response of < and > operations where substrings are compared.
2015-11-17 17:20:30 +00:00
Joe Finney 9b5fa0fcfc minor bugfixes in MICROBIT_HEAP_DEBUG 2015-11-17 16:58:42 +00:00
Robert May 51ea69201e Disconnect BLE before hard reset
If BLE is connected when performing a hard reset, attempt to disconnect
first to allow the remote peer to handle the disconnect gracefully
without haing to wait for a supervision timeout.
2015-11-17 13:12:27 +00:00
Joe Finney ac381fa5dc microbit: Alpha version of standard BLE MITM passkey security
- refactored BLE funcitonality into BLEManager class.
- added security requirements standard BLE profile services.
- updated bluezone pairing process to use BLE passkey exchange.
2015-11-16 13:44:27 +00:00
Joe Finney 79c739674c first compiling build. 2015-11-15 14:31:44 +00:00
Joe Finney 6dca3ed8d4 microbit: pre-compilation backup only. 2015-11-13 20:38:37 +00:00
Michal Moskal 56a560e5bc Merge branch 'master' into flatstring
Conflicts:
	.gitignore
	inc/ErrorNo.h
	source/MicroBitDisplay.cpp
	source/MicroBitImage.cpp
2015-11-12 16:13:45 -08:00
Joe Finney ea51f396ca Added compatibility for builds under ARMCC 2015-11-08 18:04:17 +00:00
Joe Finney 435debffed Merge branch 'quiet-gcc-build' of https://github.com/remay/microbit-dal into remay-quiet-gcc-build 2015-11-08 13:50:33 +00:00
Joe Finney 13456c60c1 microbit: Removal of explicit Serial instance for debugging.
Debugging now runs via the standrad MicroBit::serial interface.
2015-11-01 23:42:53 +00:00
Joe Finney 1a65e4e7bc microbit: Added support for soft reset button in panic mode
Also recalibrated loop timers in MicroBitDisplay::Error(), as used by panic()...
strange these now seem off by several orders of magnitude.

TODO: Ensure CPU is running at correct internal frequency with an oscilloscope test...
2015-11-01 21:33:46 +00:00
Robert May b8083908a7 Correct warnings supression in more obvious way
Whilst a little more invasive change than the previous warnings
supression this is more correct and more obvious as to what's being done,
and what warnigns will remain in place for the rest of the comilation
unit.
2015-11-01 20:19:18 +00:00
Robert May 9591ef40dc Turn off -Wunused-parameter for include "nrf_soc.h"
Unfortunately we can't turn it off just while nrf_soc.h is being included
as the way the defines are used the compiler can't tell the parameters
are unused until the end of the compilation unit.  So we can't use the
more normal

as that pops the supression too early.

WARNING: including nrf_soc.h will turn off unused-function warnings for
the rest of the compilation unit - see included nrf_svc.h
2015-11-01 20:19:17 +00:00
Robert May 1a1a5976a8 Silence GCC -Wall 2015-11-01 20:19:17 +00:00
Robert May 3a8c72144f up the cmake version required to 2.8.12, which is required for target_compile_options. 2015-11-01 20:19:17 +00:00
Robert May a39ba7d4f7 Turn off GCC warnings when building the dependancies 2015-11-01 20:19:17 +00:00
Robert May b2d3417559 Fix build when $git_branch fails to be set correctly. 2015-11-01 20:19:17 +00:00
Joe Finney 194f19a428 Merge branch 'simplified-eventing' 2015-11-01 18:22:27 +00:00
Joe Finney 1b6d6038c1 Merge branch 'master' into tight-validation 2015-11-01 16:28:08 +00:00
Joe Finney 77af825df0 Merge branch 'master' into simplified-eventing 2015-11-01 16:27:15 +00:00
Joe Finney 39abf824dc microbit: More efficient handling of events
Removed unnecessary queing of item on the MessageBus, whilst maintaining causal ordering.
2015-11-01 15:16:27 +00:00
Joe Finney b2e9369771 microbit: BUGFIX DoS attacks on the MessageBus
- Enures an event listener is not deleted whilst a fiber is activiely processing a queue
 - Added support for resurrection of event listeners in cases where identical listeners are removed/added repetitively.
2015-11-01 12:59:52 +00:00
Joe Finney 84da6a4a09 microbit: Minor bug fixes and refinements
- Add maximum depth for event queues, to prevent buggy scripts causing total memory exhaustion.
  - Suppress generation of A/B click events when A+B click is generated
  - preservation of event ordering on messagebus for resursive event generation cases.
  - bugfix of message bus processing to prevent occasional dual processing of events
  - bugfix MicroBitDisplay to behave correctly when delay parameter is zero.
2015-10-31 10:27:38 +00:00
Joe Finney 0fa8296048 microbit: BUGFIX safe deletion of listeners
also correction to minor bu in MicroBitFiber that could conceivably send more
notifications that it should...
2015-10-29 00:08:33 +00:00
Joe Finney 1eeaeca2c6 microbit: BUGFIX - correct initialization of MicroBitListener
code now correctly initiailizes the evt_queue filed needed to prevent
lockup during event processing (understandably!).
2015-10-28 14:17:12 +00:00
Michal Moskal 3900962556 Remove specific panic codes for ref-counting. 2015-10-27 08:28:06 -07:00
Michal Moskal 59853855b0 Remove caching of getSerial(); use temporary for BLE init 2015-10-27 08:26:07 -07:00
Michal Moskal 6437e714fa Delete when ref-count goes to 1, not 2\! 2015-10-27 08:19:56 -07:00
Michal Moskal c1050df0d9 Make the image width/height 16 bit wide 2015-10-27 08:02:42 -07:00
Joe Finney 7f64a4c703 microbit: BUGFIX Corrected incorrect handling of MicroBitMessageBus::add return values. 2015-10-26 16:37:12 +00:00
Joe Finney 823a956d68 microbit: First cut at updates to provide tight validation within the runtime code, with a view to moving
NOP/clamping behaviour out of teh micro:bit runtime and into the glue layers of higher level
languages.

 - Updates to many functions to provide explicut return codes.
 - Updates to many functions to remove heuristic calidation (NOP/clamping/defaults)
 - Updates to ErrorNo.h to provide clearer return values, and place return values in a better scope
 - Updates to MicroBitDisplay to use enums where appropriate.
2015-10-25 21:51:33 +00:00
Michal Moskal 7b82f3e8eb Improve comments; cleanup 2015-10-25 13:09:24 -07:00
Michal Moskal 98ffcc1fd1 Add status panic codes for ref-count errors 2015-10-25 12:59:45 -07:00
Michal Moskal 85b4e45863 Order-of-initialization fix. 2015-10-25 11:38:00 -07:00
Michal Moskal d0b75c96d1 Add MicroBitImage::isReadOnly,clone.
Add MicroBitImage,ManagedString::leakData().
Work more on incr()/decr() protocol.
2015-10-25 10:03:14 -07:00
Michal Moskal 11c99d0b84 Make the reference count always odd to make it possible to distinguish it from a vtable 2015-10-25 08:30:05 -07:00
Michal Moskal 5df59c2f7e Remove VirtualRefCounted class; non-virtual <-> virtual casts are not no-ops. 2015-10-24 21:52:51 -07:00
Michal Moskal 4f82a6c37c Use RefCounted also for MicroBitImage. 2015-10-24 20:58:03 -07:00
Michal Moskal 9330b401d5 Move RefCounted class to a separate file 2015-10-24 20:30:15 -07:00
Michal Moskal 5a10bda561 First stab at more memory efficient strings 2015-10-24 19:34:04 -07:00
Michal Moskal 057158c9f3 Cache getSerial(); otherwise BLE information device initalization may crash 2015-10-24 19:28:36 -07:00
Joe Finney bfe1b4db53 microbit: some work on tightening the API return codes.
still work in progress.
2015-10-21 11:35:59 +01:00
Joe Finney 613f524bab microbit: BUGFIX: micro:bit not entering BLUEZONE mode cleanly
Fixed bug in GAP advertisement configuration.
2015-10-19 14:42:13 +01:00
Joe Finney 72e5a9a6a6 microbit: BUGFIX - post merge fixes
- MicroBitDisplay::scroll() timing bug
  - MicroBitDisplay::print() timing bug
  - MicroBitFiber wait/notify bug
2015-10-18 19:09:54 +01:00
Joe Finney 424b825185 Merge branch 'master' into simplified-eventing
Conflicts:
	inc/MicroBitMessageBus.h
2015-10-18 18:20:03 +01:00
Joe Finney 80f79f7faf Merge branch 'master' into ble-profile
Conflicts:
	source/CMakeLists.txt
	source/MicroBit.cpp
	source/MicroBitFiber.cpp
	source/MicroBitMessageBus.cpp
	source/MicroBitSuperMain.cpp
2015-10-18 17:54:37 +01:00
Joe Finney db3eccf6ff microbit: Final updates to BLE profile
Minor changes to BLE profile services (cleanup prior to merge with master branch):

  - Added temperature period characteristic to match design pattern of other sensors.
  - Updated endinaness of MicroBitLEDService Matrix to be more intuitive.
  - Cleaned up Microbit.cpp by removing unused reference to BLE services.
  - Exposed serial number and naming information thr BLE DeviceInformation and API.
  - Updated BLE advertisement period to be alightly more repsonsive (200ms vs 1000ms).
  - BUGFIX: micro:bit name is now always generated, regardless of BLE services.
  - BUGFIX: Scroll Period data length.
2015-10-18 14:46:42 +01:00
Joe Finney aca544677e microbit: Updates to enable queing of display animation calls
Updates to change the behaviour of the scroll/print/animate faily of function away
from being pre-emtive and instead prroviding queing behaviour.

Minor updates to provide complete sets of async equivalent operations

Updates to the scheduler to provide wait/notify/waitone semantics.
2015-10-17 20:35:16 +01:00
Joe Finney 068822ff12 Merge branch 'matrix-point-optimisation' of https://github.com/dpgeorge/microbit-dal into dpgeorge-matrix-point-optimisation 2015-10-14 09:38:13 +01:00
Joe Finney 2011886e64 microbot: Cleanup of #ifdef in MicroBitHeapAllocator
Removed compiler warning if MICROBIT_HEAP_REUSE_SD is not defined.
2015-10-09 16:58:10 +01:00
Joe Finney 6764c732ea microbit: BUGFIX to MicroBtDFU Service
- Updates to UI handling to avoid starving out the processor.
  - Clears screen before entering DFU bootloader
2015-10-09 01:14:36 +01:00
Joe Finney 122d885ee8 microbit: Updated Bluetooth device name from MicroBit to micro:bit to match brand guidelines 2015-10-09 00:03:01 +01:00
Joe Finney ce2cc57bf1 microbit: Optimisation of internal Message Bus listeners
All message bus listeners with the micro:bit runtie are non blocking, and safe to be called
in an interrupt context. As such, these have now all been declared MESSAGE_BUS_LISTENER_IMMEDIATE
which should mitigate all unbounded event queueing effects.
2015-10-08 23:49:14 +01:00
Joe Finney 1d76def8fa microbit: BLE service bugfixes
Updates to BLE interface to match specification following testing by Bluetooth SIG.

Accelerometer Period: now supports READ and WRITE
Magnetometer Period: now supports READ and WRITE
LED Matrix State: now supports READ and WRITE.

UUIDs of Temperature Service characteristic corrected.
2015-10-08 23:23:00 +01:00
Joe Finney 85a26dc8e1 microbit: Updates to enable semantic versioning of the micro:bit runtime DAL
More specifically, the build system now uses the semantic versioning meta-data
held in module.json to define a major.minor.patch version. Additionally, is the branch
being compiled is *not* the master branch, the version is appended with <branchname><githash>.

Specific updates:

- Updates to CMake files to expose this to the micro:bit runtime code.
- Addition of uBit.systemVersion() to expose this to application code.
- Displaying of version string over serial if MICROBIT_DBG is enabled.
- Distribution of version string over BLE via the firmware revision characteristic.
2015-10-08 14:37:35 +01:00
Joe Finney 2230e39340 microbit: BUGFIX: #1291 ManagedString(INT_MIN) does not work properly
Corner case error in serialization code for INT_MIN only - corrected.
2015-09-29 23:51:20 +01:00
Joe Finney 18236810a3 microbit: BLE Profile Beta 1
First functionally complete BLE profile, matching BLE speicfication v1.6.
More specifically, the following services are now functional:

  - AccelerometerService
  - MeganetometerService
  - EventService
  - TemperatureServide
  - IOPinService
  - DFUService
  - ButtonService
  - LEDService

Also, updates to underlying device drivers to enable greater configurability:

  - MicroBitCompass now supports variable sample rates and temperature sensing
  - MicroBitAccelerometer now supports variable sample rates and ranges
  - MicroBitThermometer introduced
  - MicroBitMessageBus adapted to permit enumeration and block removal of listeners

Finally, MicroBit DFU Service has been changed to the new UUIDs specificed in v1.6 of BLE spec.
2015-09-28 21:40:44 +01:00
Damien George 0dcb6834ec microbit: Use default constructor for MatrixPoint so data is ROMable.
Previous to this patch an explicit constructor was provided for creating
MatrixPoint instances, which meant that such objects could not be put in
ROM (since they needed to be constructed at runtime).

By using the defualt construction method for structs the MatrixPoint map
is now compiled into the rodata section, hence freeing up RAM.

Saves: 4 bytes data, 56 bytes bss, 148 bytes code.
2015-09-25 21:19:10 +01:00
Joe Finney 4314b68643 microbit: First implementation of Temperature Service 2015-09-23 22:15:44 +01:00
Joe Finney eb5ed28f74 microbit: First cut at MicroBitButtonService and microBitIOPinService
Strictly still development - untested code.
2015-09-22 16:13:08 +01:00
Joe Finney ef613e9d86 microbit: Added BLE Magnetometer service compilation, initialization and configuration options 2015-09-19 22:19:57 +01:00
Joe Finney 3cfc7ec6e7 microbit: Ammendments to ensure fiber is never pages out due to eventing and minor cleanups
- renamed fiber flag to be more general.
- renamed idle to idleFiber to be consistent with the rest of the code.
- factored content of idle() into a funciton to avoid dupication.
- added test case to MessageBus::process() to avoid forking fibers if not requested.
- removed fiber_allow_run_idle_within mutator in favour of exposing currentFiber, as a more general solution.
2015-09-19 21:44:58 +01:00
Joe Finney 1e71169550 microbit: First draft of Magnetometer BLE service 2015-09-19 21:03:36 +01:00
Joe Finney ae0e5611c3 microbit: First draft of reconfigurable frequencies of MicroBitCompass 2015-09-19 21:00:38 +01:00
Damien George 9ccdd25e9f microbit: Allow to run the idle task within the current fiber's stack.
If there is only 1 main fiber (plus the idle fiber) then enabling this
new feature for the main fiber (using fiber_allow_run_idle_within())
will mean that no heap is needed to swap the stack out.
2015-09-19 11:45:45 +01:00
Joe Finney 2c9f63902c microbit: Message Bus updates to support URGENT events queue optimisations
Added new URGENT listener type, that ensures immediate, non queuing delivery of events.
Introduced two-pass algorithm into message bus. Only events with an event listener are now
queued at ingress - this reduces unecessary memory usage for 'uninteresting' events.
2015-09-18 23:20:44 +01:00
Joe Finney 058f73ede1 microbit: Moved MicroBitDFUService UUIDs to match BLE profile specification 2015-09-18 18:48:27 +01:00
Joe Finney ec30695d7d microbit: BUGFIX MicroBit::reset() now operates correctly 2015-09-17 23:32:40 +01:00
Jonathan Protzenko 78ad8a1646 Small tweak for the new ignore function. 2015-09-16 12:08:09 -07:00
Jonathan Protzenko 3158445208 New setAnalogPeriodUs function.
Fixes bbc/microbit-extras#1389.
2015-09-16 11:52:25 -07:00
Joe Finney a17830030e microbit: HOTFIX: BLE Notification bug in MicroBitDFUService
Hotfix of a minor bug in the MicroBitDFU Service that prevented BLE notifications
from being sent on the FlashCode characterisitic. Needed as the Samsung companion
app is dependent on this functionality to enable BLE programmming of the micro:bit.
2015-09-15 17:03:36 +01:00
Joe Finney 037ef999eb microbit: Merge branch 'master' into ble-profile
Pulled in changes from MessageBusExtensions to support development of ble profiles.
2015-09-15 15:17:21 +01:00
Joe Finney ccd351a4ed microbit: Added explicit notify() operation to MicroBitDFUService 2015-09-15 14:34:25 +01:00
Joe Finney 3395f66d3d microbit: Added configurable event processing options into MicroBitEvent
Events in the micro:bit runtime are normally launched through making an instance
of the MicroBitEvent class. This update added configuration support to all the
code creating the MicroBitEvent decide if the newly created event should then be
automatically queued on the MessageBus or processed immediately by event handlers.
2015-09-12 11:34:16 +01:00
Joe Finney a875d5fccd microbit: Added configurable concurrency modes for MicroBitMessageBus handlers.
MessageBus handlers can now have one of four concurrency modes for the eventuality
of an event being raised whilst a previous event is still being processed. An additional
(optional) parameter is provided to the listen() functions to allow this to be selected
on a per event handler basis. The permissable options are:

MESSAGE_BUS_LISTENER_REENTRANT:
The event handler is fired with the new event, regardless of whether or not
a previous event is still be processed by that handler.

MESSAGE_BUS_LISTENER_QUEUE_IF_BUSY:
The new event is queued until such a time as the previous event has completed
execution. The new event is then processed. This option does not preclude the
processing of the new event by other event handlers.

MESSAGE_BUS_LISTENER_DROP_IF_BUSY:
The new event is dropped, and will never be processed the the event handler.
This option does not preclude the processing of the new event by other event handlers.

MESSAGE_BUS_LISTENER_NONBLOCKING:
The event handler is self-declaring that it never blocks. This flag is used purely
for optimisation, as it permits direct execution of the event hadnelr without inducing
any overhead from the scheduler.

In addition, the following minor revisions were made in this release:

* Cleanup of the #include dependencies contained in the microbit-dal .h files
* Bugfix to the scheduler block on event matching code.
* Introduced a MICROBIT_ID_ALERT MessageBus channel, for general purpose eventing using nonces.
2015-09-11 16:39:38 +01:00
Joe Finney 51493092ff microbit: Added support to remove MicroBitListener event handlers. 2015-09-10 12:53:39 +01:00
Joe Finney 8ea2e953c8 microbit: Added C++ member function callback support into MicroBitMessageBus
Event callbacks can now be transparently added to any C++ member function
matching the MicroBitMessageBud signature:  void fn(MicroBitEvent e)
2015-09-10 00:04:27 +01:00
Joe Finney 609cb6f2d8 microbit: Added first draft of BLE Accelerometer service
n.b. this code is as yet untested.
2015-09-09 15:16:11 +01:00
Joe Finney 9ccf0a7688 microbit: Added configuration support for accelerometer sample rate and range
MicroBitAccelerometer now contans methods to allow dynamic selection of sample range
(from +/-2g to +/-8g) and sample frequency (up to 800Hz). The default settings and behaviour
remain consistent.
2015-09-08 23:16:15 +01:00
Joe Finney 380b999440 microbit: BUGFIX: read callbacks on working
Changes to MicroBitLEDService class to ensure matrixCharacteristic remains
persistent. Needed to allow mbed read callbacks.
2015-09-08 13:55:15 +01:00
Joe Finney 7e18131849 microbit: Added MicroBitLEDService
One of the standard services defiend with the Bluetooth SIG. Allows remote control
of the LED matrix display over BLE.
2015-09-07 17:09:17 +01:00
Joe Finney 574b408cd1 microbit: Code Structure Cleanup
Create subdirectories for assembler code and BLE specific functionality
2015-09-07 10:26:48 +01:00
Joe Finney 8e1a15c79f microbit: Added support for custom configuration files through yotta
A header file containing custom configuration options for the microbit:runtime can
now be defined through a yotaa configuration option.

For example, including the following inside a top level config.json file
will load configuration options from a file called "MicroBitCustomConfig.h" that is stored
alongside an application's main.cpp. Any options defined there will override the defaults
defined in microbit-dal/inc/MicroBitConfig.h :

{
   "microbit" :{
      "configfile" : "source/MicroBitCustomConfig.h"
   }
}
2015-09-04 00:08:20 +01:00
Joe Finney f616011ac1 microbit: Integrate support for transparent gcc compiles
Custom CMakefile added to microbit-dal to automatically assemble the correct
version of CortexContextSwitch.s accordiong to the current build target.
2015-09-02 18:54:31 +01:00
Joe Finney cbaec38d06 Merge branch 'gcc' 2015-09-02 18:40:26 +01:00
Joe Finney 6470b71b1d microbit: Conditional compilation on MicroBitConfig
All options defined in MicroBitConfig are now set IFF they already do not have a value.
This allows external configuration of these options much more cleanly. Additional macros
also defined to provide clean implementation for boolean configuration switches.

Also some minor bugfixes:

  - Correction of typo of "Microbit.h" => "MicroBit.h"
  - Fixed heap corruption bug on gcc as a result of a debug printf in an unsafe context.
2015-09-02 12:42:24 +01:00
Joe Finney 857a626ed0 microbit: Memory Optimisation Mega Update
This release contains a widespread set of updates and optimisations to the micro:bit
runtime, with a view to reducing the SRAM footprint of the whole system. This is to
provide as much usable HEAP storage for application programs as possible.

Specific updates and optimisations include:

  - Additional compilation flags to allow the core micro:bit runtime to be configured.
    These are defined in MicroBitConfig.h

  - A custom heap allocator. This is now included for two reasons:

    1) To provide a simple mechanism to to utilise both the mbed heap space and other memory
       regions (such as unused memory in the SoftDevice region) as a single virtual heap.
    2) To address some issues that have been noted that are attributable to heap fragmentation.
       The micro:bit heap allocator has a simple algorithm, but one that is chosen to respond
       well to the relativelt high 'heap churn' found in the micro:bit environment.

    All micro:bit components and user programs now use this heap allocator trasparently.

  - Updates to BLE services to remove persistent references to their GATT services. This consumes
    vast amounts SRAM, rather unecessarily. Instead only handles to the relevant GATT characteristics
    are now stored. This specifically includes:
      + MicroBitDFUService
      + MicroBitEventService
      + DeviceInformationService

  - Updates to the Fiber scheduler to save SRAM. More specifically:
      + Removed the need to hold an empty processor context to intialise fibers.
      + The IDLE fiber now runs without a stack
      + fiber stacks are now only created when a fiber is descheduled for the first time, thereby reducing heap churn.
      + the 'main' fiber is now recycled into the fiber_pool if it leaves app_main()
      + fibers created through invoke() now only maintains the necessary part of teh parent stack that is needed, thereby
        reducing the stack size of spawned fibers.

  - Updates to the Message Bus to reduce the overall memory footprint of processing events. More specifically:
      + Event handlers are now always called using invoke(), such that non-blocking event handlers no longer need
        a dedicated fiber to execute - thereby saving SRAM and processor time.
      + Processing of events from the event queue is now rate paced. Events only continue to be processed as long as there
        are no fibers on the run queue. i.e. event processing is no longer greedy, thereby reducing the number of fibers
        created on the runqueue.

  - Updates to BLUEZOENE code to bring up core BLE services even if they are not enabled by default. This allows
    programs that do not require BLE to operate to benefit from the full range of SRAM, whilst still allowing the
    device to be programmed over BLE.

  - Updates to the Soft Device initialisation configuration, reducing the size of the GATT table held in the top 1.8K
    of its 8K memory region to around 800 bytes. This is sufficient to run the default set of BLE services on the micro:bit
    so the additional memory is configured as HEAP storage by MicroBitHeapAllocator.

  - Minor changes to a range of components to integrate with the above changes.
    + rename of free() to release() in DynamicPWM to avoid namespace collision with MicroBitHeap free()
    + rename of fork_on_block to invoke() to enhance readbility.

  - Many code cleanups and updates to out of date comments.
2015-08-31 23:25:10 +01:00
Jonathan Protzenko e258a52c79 My CMake skills are weak... properly implement the GCC/ARMCC switch for the S
file.
2015-08-24 10:55:22 -07:00
Jonathan Protzenko 8491b558e0 CMake tweak 2015-08-24 10:49:25 -07:00
Jonathan Protzenko 63b62e533f A version of microbit-dal that builds with both gcc and armcc.
Check in the CMakeLists.txt with a custom hook so that the library can build
with both compilers regardless.
2015-08-24 10:33:30 -07:00
Joe Finney 42f43b2255 Merge branch 'master' of https://github.com/lancaster-university/microbit-dal 2015-08-19 23:48:36 +01:00
Joe Finney 0fec4ae87c microbit: BUGFIX - Input validation in MicroBitDisplay::setBrightness()
Updates to MicroBitDisplay::setBrightness() to perform a NOP for out of bound parameters.
This aligns the functionality of the runtime with the TD simulator.
2015-08-19 23:36:17 +01:00
Joe Finney 58d24ab0a8 microbit: Updated MicroBitMessageBus to use fork_on_block functionality
Updates the MicroBitMessageBus implementation to use fork_on_block() calls rather
than create_fiber() calls when servicing events. This provides greater optimisation
for non-blocking event handlers.

More specifically, this update:

 - Replaces calls to create_fiber() ith fork_on_block during event send operations.
 - Adds a queue of events, to ensure events generated from interrupt context are not serviced in interrupt context.
 - Registers a listener with the idle process to empty the event queue.
2015-08-19 23:35:45 +01:00
Joe Finney f4b8a1a272 microbit: Added fork_on_block functionality to fiber scheduler
The microbit fiber scheduler is often used to service event handlers by the microbit message bus.
This provides a very elegant decoupling of user code from system code, interrupt handlers and
also allows users to make blocking calls within event handlers. However, many event handlers are
non-blocking, so launching a dedicated fiber is wasteful in terms of time and SRAM.

This patch adds fork_on_block() to the scheduler. Inspired by the UNIX copy_on_write
technique, this optimisation is semantically equivalent to a create_fiber() call, but will first attempt
to execute the given function in the context of the currently running fiber, and *only* create a fiber
if the given code attempts a blocking operation.

More specifically, this update:

 - adds fork_on_block() functions for parameterised and non-parameterised functions.
 - adds fields to the fiber context to record the status of parent/child fibers.
 - adds optimised ASM functions to store and restore Cortex M0 register context.
 - adds a utility function to determine if the processor is executing in interrupt context.
 - updates to sleep() and wait_for_event() to handle fork_on_block semantics.
 - minor code optimsations within the scheduler.
2015-08-19 23:27:26 +01:00
Jonathan Protzenko 753d6965f5 New gcc branch 2015-08-14 15:07:35 -07:00
James Devine 3ef5901c5b microbit-dal: added a reset mechanism to uBit
Users can now call uBit.reset() to reset the device.
2015-08-14 16:51:45 +01:00
James Devine d7b3ba9dab microbit-dal: Fixed a bug on printing a character with a delay
Previously when a blocking print finished, the animatemode was not
reset, which meant sometimes there would be a race condition.
2015-08-14 01:06:41 +01:00
James Devine f8ebfc69fb microbit-dal: added #define to determine BLE usage
NO_BLE can now be defined to determine whether ble
will be brought up or not at initialisation of uBit.
This is especially useful for two new Yotta targets:
bbc-microbit-classic-gcc-nosd,
bbc-microbit-classic-armcc-nosd, which do not use
softdevice.
2015-08-13 00:49:48 +01:00
James Devine 538e1c48bd microbit-dal: Initial Commit
This is the first commit of the microbit-dal on GitHub.
This repository contains the runtime, which is a light
weight operating system developed by Lancaster University.
2015-08-12 11:53:41 +01:00