Revision 0:ee31ccbe9919, committed 2019-12-23

Comitter:

ikkeje

Date:

Mon Dec 23 10:31:28 2019 +0000

Commit message:

1.1

Changed in this revision

diff -r 000000000000 -r ee31ccbe9919 LICENSE
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LICENSE	Mon Dec 23 10:31:28 2019 +0000
@@ -0,0 +1,22 @@
+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.

diff -r 000000000000 -r ee31ccbe9919 README.md
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/README.md	Mon Dec 23 10:31:28 2019 +0000
@@ -0,0 +1,42 @@
+# microbit
+
+A collection of the commonly used components of the micro:bit runtime with a
+standard configuration, to provide an easy to use interface for programming the micro:bit in C/C++.
+
+## Overview
+
+The micro:bit runtime provides an easy to use environment for programming the BBC micro:bit in the C/C++ language, written by Lancaster University. It contains device drivers for all the hardware capabilities of the micro:bit, and also a suite of runtime mechanisms to make programming the micro:bit easier and more flexible. These range from control of the LED matrix display to peer-to-peer radio communication and secure Bluetooth Low Energy services. The micro:bit runtime is proudly built on the ARM mbed and Nordic nrf51 platforms.
+
+In addition to supporting development in C/C++, the runtime is also designed specifically to support higher level languages provided by our partners that target the micro:bit. It is currently used as a support library for all the languages on the BBC www.microbit.co.uk website, including Microsoft Block, Microsoft TouchDevelop, Code Kingdoms JavaScript and Micropython languages.
+
+## Links
+
+[micro:bit runtime docs](http://lancaster-university.github.io/microbit-docs/) | [microbit-dal](https://github.com/lancaster-university/microbit-dal) |  [samples](https://github.com/lancaster-university/microbit-samples)
+
+## Build Environments
+
+| Build Environment | Documentation |
+| ------------- |-------------|
+| ARM mbed online | http://lancaster-university.github.io/microbit-docs/online-toolchains/#mbed |
+| yotta  | http://lancaster-university.github.io/microbit-docs/offline-toolchains/#yotta |
+
+
+
+## Hello World!
+
+```cpp
+#include "MicroBit.h"
+
+MicroBit uBit;
+
+int main()
+{
+    uBit.init();
+
+    uBit.display.scroll("Hello world!");
+}
+```
+
+## BBC Community Guidelines
+
+[BBC Community Guidelines](https://www.microbit.co.uk/help#sect_cg)

diff -r 000000000000 -r ee31ccbe9919 inc/MicroBit.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/inc/MicroBit.h	Mon Dec 23 10:31:28 2019 +0000
@@ -0,0 +1,658 @@
+/*
+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.
+*/
+
+#ifndef MICROBIT_H
+#define MICROBIT_H
+
+#include "mbed.h"
+
+#include "MicroBitConfig.h"
+#include "MicroBitHeapAllocator.h"
+#include "MicroBitDevice.h"
+#include "ErrorNo.h"
+#include "MicroBitSystemTimer.h"
+#include "Matrix4.h"
+#include "MicroBitCompat.h"
+#include "MicroBitComponent.h"
+#include "ManagedType.h"
+#include "ManagedString.h"
+#include "MicroBitImage.h"
+#include "MicroBitFont.h"
+#include "MicroBitEvent.h"
+#include "DynamicPwm.h"
+#include "MicroBitI2C.h"
+#include "NotifyEvents.h"
+
+#include "MicroBitButton.h"
+#include "MicroBitPin.h"
+#include "MicroBitCompass.h"
+#include "MicroBitCompassCalibrator.h"
+#include "MicroBitAccelerometer.h"
+#include "MicroBitThermometer.h"
+#include "MicroBitLightSensor.h"
+#include "MicroBitMultiButton.h"
+
+#include "MicroBitSerial.h"
+#include "MicroBitIO.h"
+#include "MicroBitMatrixMaps.h"
+#include "MicroBitDisplay.h"
+
+#include "MicroBitFiber.h"
+#include "MicroBitMessageBus.h"
+
+#include "MicroBitBLEManager.h"
+#include "MicroBitRadio.h"
+#include "MicroBitStorage.h"
+
+// MicroBit::flags values
+#define MICROBIT_INITIALIZED                    0x01
+
+/**
+  * Class definition for a MicroBit device.
+  *
+  * Represents the device as a whole, and includes member variables that represent various device drivers
+  * used to control aspects of the micro:bit.
+  */
+class MicroBit
+{
+    private:
+
+    /**
+      * A listener to perform actions as a result of Message Bus reflection.
+      *
+      * In some cases we want to perform lazy instantiation of components, such as
+      * the compass and the accelerometer, where we only want to add them to the idle
+      * fiber when someone has the intention of using these components.
+      */
+    void                        onListenerRegisteredEvent(MicroBitEvent evt);
+
+    uint8_t                     status;
+
+    public:
+
+    // Serial Interface
+    MicroBitSerial              serial;
+
+	// Reset Button
+	InterruptIn     		    resetButton;
+
+    // Persistent key value store
+    MicroBitStorage             storage;
+
+    // I2C Interface
+    MicroBitI2C                 i2c;
+
+    // Device level Message Bus abstraction
+    MicroBitMessageBus          messageBus;
+
+    // Member variables to represent each of the core components on the device.
+    MicroBitDisplay             display;
+    MicroBitButton              buttonA;
+    MicroBitButton              buttonB;
+    MicroBitMultiButton         buttonAB;
+    MicroBitAccelerometer       accelerometer;
+    MicroBitCompass             compass;
+    MicroBitCompassCalibrator   compassCalibrator;
+    MicroBitThermometer         thermometer;
+
+    //An object of available IO pins on the device
+    MicroBitIO                  io;
+
+    // Bluetooth related member variables.
+	MicroBitBLEManager		    bleManager;
+    MicroBitRadio               radio;
+    BLEDevice                   *ble;
+
+    /**
+      * Constructor.
+      *
+      * Create a representation of a MicroBit device, which includes member variables
+      * that represent various device drivers used to control aspects of the micro:bit.
+      */
+    MicroBit();
+
+    /**
+      * Post constructor initialisation method.
+      *
+      * This call will initialised the scheduler, memory allocator and Bluetooth stack.
+      *
+      * This is required as the Bluetooth stack can't be brought up in a
+      * static context i.e. in a constructor.
+      *
+      * @code
+      * uBit.init();
+      * @endcode
+      *
+      * @note This method must be called before user code utilises any functionality
+      *       contained by uBit.
+      */
+    void init();
+
+    /**
+      * Return the friendly name for this device.
+      *
+      * @return A ManagedString representing the friendly name of this device.
+      *
+      * @code
+      * ManagedString name = uBit.getName();
+      * @endcode
+      */
+    static ManagedString getName();
+
+    /**
+      * Return the serial number of this device.
+      *
+      * @return A ManagedString representing the serial number of this device.
+      *
+      * @code
+      * ManagedString serialNumber = uBit.getSerial();
+      * @endcode
+      */
+    static ManagedString getSerial();
+
+    /**
+      * Will reset the micro:bit when called.
+      *
+      * @code
+      * uBit.reset();
+      * @endcode
+      */
+    void reset();
+
+    /**
+      * Delay execution for the given amount of time.
+      *
+      * If the scheduler is running, this will deschedule the current fiber and perform
+      * a power efficient, concurrent sleep operation.
+      *
+      * If the scheduler is disabled or we're running in an interrupt context, this
+      * will revert to a busy wait.
+      *
+      * Alternatively: wait, wait_ms, wait_us can be used which will perform a blocking sleep
+      * operation.
+      *
+      * @param milliseconds the amount of time, in ms, to wait for. This number cannot be negative.
+      *
+      * @return MICROBIT_OK on success, MICROBIT_INVALID_PARAMETER milliseconds is less than zero.
+      *
+      * @code
+      * uBit.sleep(20); //sleep for 20ms
+      * @endcode
+      *
+      * @note This operation is currently limited by the rate of the system timer, therefore
+      *       the granularity of the sleep operation is limited to 6 ms unless the rate of
+      *       the system timer is modified.
+      */
+    void sleep(uint32_t milliseconds);
+
+    /**
+      * Seed the pseudo random number generator using the hardware random number generator.
+      *
+      * @code
+      * uBit.seedRandom();
+      * @endcode
+      */
+    void seedRandom();
+
+    /**
+      * Seed the pseudo random number generator using the given value.
+      *
+      * @param seed The 32-bit value to seed the generator with.
+      *
+      * @code
+      * uBit.seedRandom(0xBB5EED);
+      * @endcode
+      */
+    void seedRandom(uint32_t seed);
+
+
+    /**
+      * Generate a random number in the given range.
+      * We use a simple Galois LFSR random number generator here,
+      * as a Galois LFSR is sufficient for our applications, and much more lightweight
+      * than the hardware random number generator built int the processor, which takes
+      * a long time and uses a lot of energy.
+      *
+      * KIDS: You shouldn't use this is the real world to generate cryptographic keys though...
+      * have a think why not. :-)
+      *
+      * @param max the upper range to generate a number for. This number cannot be negative.
+      *
+      * @return A random, natural number between 0 and the max-1. Or MICROBIT_INVALID_VALUE if max is <= 0.
+      *
+      * @code
+      * uBit.random(200); //a number between 0 and 199
+      * @endcode
+      */
+    int random(int max);
+
+    /**
+      * Determine the time since this MicroBit was last reset.
+      *
+      * @return The time since the last reset, in milliseconds.
+      *
+      * @note This will value overflow after 1.6 months.
+      */
+      //TODO: handle overflow case.
+    unsigned long systemTime();
+
+    /**
+      * Determine the version of the micro:bit runtime currently in use.
+      *
+      * @return A textual description of the version of the micro:bit runtime that
+      *         is currently running on this device.
+      */
+    const char *systemVersion();
+
+    /**
+      * Triggers a microbit panic where an loop will display a panic face
+      * and the status code, if provided.
+      *
+      * This loop will continue for panic_timeout iterations, defaults to 0 (infinite).
+      *
+      * panic_timeout can be configured via a call to microbit_panic_timeout.
+      *
+      * @param statusCode the status code of the associated error.
+      *
+      * @code
+      * microbit_panic_timeout(4);
+      *
+      * // will display loop for 4 iterations.
+      * uBit.panic(10);
+      * @endcode
+      */
+    void panic(int statusCode = 0);
+
+    /**
+      * Add a component to the array of system components. This component will then receive
+      * periodic callbacks, once every tick period in interrupt context.
+      *
+      * @param component The component to add.
+      *
+      * @return MICROBIT_OK on success or MICROBIT_NO_RESOURCES if the component array is full.
+      *
+      * @code
+      * // heap allocated - otherwise it will be paged out!
+      * MicroBitDisplay* display = new MicroBitDisplay();
+      *
+      * uBit.addSystemComponent(display);
+      * @endcode
+      *
+      * @note This interface is now deprecated, and will be removed in the next major release. Please use system_timer_add_component().
+      */
+	int addSystemComponent(MicroBitComponent *component);
+
+    /**
+      * Remove a component from the array of system components. This component will no longer receive
+      * periodic callbacks.
+      *
+      * @param component The component to remove.
+      *
+      * @return MICROBIT_OK on success or MICROBIT_INVALID_PARAMETER is returned if the given component has not been previously added.
+      *
+      * @code
+      * // heap allocated - otherwise it will be paged out!
+      * MicroBitDisplay* display = new MicroBitDisplay();
+      *
+      * uBit.addSystemComponent(display);
+      *
+      * uBit.removeSystemComponent(display);
+      * @endcode
+      *
+      * @note This interface is now deprecated, and will be removed in the next major release. Please use system_timer_remove_component().
+      */
+	int removeSystemComponent(MicroBitComponent *component);
+
+    /**
+      * Adds a component to the array of idle thread components, which are processed
+      * when the run queue is empty.
+      *
+      * The system timer will poll isIdleCallbackNeeded on each component to determine
+      * if the scheduler should schedule the idle_task imminently.
+      *
+      * @param component The component to add to the array.
+      *
+      * @return MICROBIT_OK on success or MICROBIT_NO_RESOURCES if the fiber components array is full.
+      *
+      * @code
+      * MicroBitI2C i2c(I2C_SDA0, I2C_SCL0);
+      *
+      * // heap allocated - otherwise it will be paged out!
+      * MicroBitAccelerometer* accelerometer = new MicroBitAccelerometer(i2c);
+      *
+      * fiber_add_idle_component(accelerometer);
+      * @endcode
+      *
+      * @note This interface is now deprecated, and will be removed in the next major release. Please use fiber_add_idle_component().
+      */
+	int addIdleComponent(MicroBitComponent *component);
+
+    /**
+      * Remove a component from the array of idle thread components
+      *
+      * @param component The component to remove from the idle component array.
+      *
+      * @return MICROBIT_OK on success. MICROBIT_INVALID_PARAMETER is returned if the given component has not been previously added.
+      *
+      * @code
+      * MicroBitI2C i2c(I2C_SDA0, I2C_SCL0);
+      *
+      * // heap allocated - otherwise it will be paged out!
+      * MicroBitAccelerometer* accelerometer = new MicroBitAccelerometer(i2c);
+      *
+      * uBit.addIdleComponent(accelerometer);
+      *
+      * uBit.removeIdleComponent(accelerometer);
+      * @endcode
+      *
+      * @note This interface is now deprecated, and will be removed in the next major release. Please use fiber_remove_idle_component().
+      */
+	int removeIdleComponent(MicroBitComponent *component);
+};
+
+/**
+  * Return the friendly name for this device.
+  *
+  * @return A ManagedString representing the friendly name of this device.
+  *
+  * @code
+  * ManagedString name = uBit.getName();
+  * @endcode
+  */
+inline ManagedString MicroBit::getName()
+{
+    return ManagedString(microbit_friendly_name());
+}
+
+/**
+  * Return the serial number of this device.
+  *
+  * @return A ManagedString representing the serial number of this device.
+  *
+  * @code
+  * ManagedString serialNumber = uBit.getSerial();
+  * @endcode
+  */
+inline ManagedString MicroBit::getSerial()
+{
+    // We take to 16 bit numbers here, as we want the full range of ID bits, but don't want negative numbers...
+    int n1 = microbit_serial_number() & 0xffff;
+    int n2 = (microbit_serial_number() >> 16) & 0xffff;
+
+    // Simply concat the two numbers.
+    ManagedString s1(n1);
+    ManagedString s2(n2);
+
+    return s1 + s2;
+}
+
+/**
+  * Will reset the micro:bit when called.
+  *
+  * @code
+  * uBit.reset();
+  * @endcode
+  */
+inline void MicroBit::reset()
+{
+    if(ble && ble->getGapState().connected) {
+
+        // We have a connected BLE peer. Disconnect the BLE session.
+        ble->gap().disconnect(Gap::REMOTE_USER_TERMINATED_CONNECTION);
+
+        // Wait a little while for the connection to drop.
+        wait_ms(100);
+    }
+
+    microbit_reset();
+}
+
+/**
+  * Delay execution for the given amount of time.
+  *
+  * If the scheduler is running, this will deschedule the current fiber and perform
+  * a power efficient, concurrent sleep operation.
+  *
+  * If the scheduler is disabled or we're running in an interrupt context, this
+  * will revert to a busy wait.
+  *
+  * Alternatively: wait, wait_ms, wait_us can be used which will perform a blocking sleep
+  * operation.
+  *
+  * @param milliseconds the amount of time, in ms, to wait for. This number cannot be negative.
+  *
+  * @return MICROBIT_OK on success, MICROBIT_INVALID_PARAMETER milliseconds is less than zero.
+  *
+  * @code
+  * uBit.sleep(20); //sleep for 20ms
+  * @endcode
+  *
+  * @note This operation is currently limited by the rate of the system timer, therefore
+  *       the granularity of the sleep operation is limited to 6 ms unless the rate of
+  *       the system timer is modified.
+  */
+inline void MicroBit::sleep(uint32_t milliseconds)
+{
+    fiber_sleep(milliseconds);
+}
+
+/**
+  * Generate a random number in the given range.
+  * We use a simple Galois LFSR random number generator here,
+  * as a Galois LFSR is sufficient for our applications, and much more lightweight
+  * than the hardware random number generator built int the processor, which takes
+  * a long time and uses a lot of energy.
+  *
+  * KIDS: You shouldn't use this is the real world to generate cryptographic keys though...
+  * have a think why not. :-)
+  *
+  * @param max the upper range to generate a number for. This number cannot be negative.
+  *
+  * @return A random, natural number between 0 and the max-1. Or MICROBIT_INVALID_VALUE if max is <= 0.
+  *
+  * @code
+  * uBit.random(200); //a number between 0 and 199
+  * @endcode
+  */
+inline int MicroBit::random(int max)
+{
+    return microbit_random(max);
+}
+
+/**
+  * Seed the pseudo random number generator using the hardware random number generator.
+  *
+  * @code
+  * uBit.seedRandom();
+  * @endcode
+  */
+inline void MicroBit::seedRandom()
+{
+    microbit_seed_random();
+}
+
+
+/**
+  * Seed the pseudo random number generator using the given value.
+  *
+  * @param seed The 32-bit value to seed the generator with.
+  *
+  * @code
+  * uBit.seedRandom(0xBB5EED);
+  * @endcode
+  */
+inline void MicroBit::seedRandom(uint32_t seed)
+{
+    microbit_seed_random(seed);
+}
+
+
+/**
+  * Add a component to the array of system components. This component will then receive
+  * periodic callbacks, once every tick period in interrupt context.
+  *
+  * @param component The component to add.
+  *
+  * @return MICROBIT_OK on success or MICROBIT_NO_RESOURCES if the component array is full.
+  *
+  * @code
+  * // heap allocated - otherwise it will be paged out!
+  * MicroBitDisplay* display = new MicroBitDisplay();
+  *
+  * uBit.addSystemComponent(display);
+  * @endcode
+  *
+  * @note This interface is now deprecated, and will be removed in the next major release. Please use system_timer_add_component().
+  */
+inline int MicroBit::addSystemComponent(MicroBitComponent *component)
+{
+	return system_timer_add_component(component);
+}
+
+/**
+  * Remove a component from the array of system components. This component will no longer receive
+  * periodic callbacks.
+  *
+  * @param component The component to remove.
+  *
+  * @return MICROBIT_OK on success or MICROBIT_INVALID_PARAMETER is returned if the given component has not been previously added.
+  *
+  * @code
+  * // heap allocated - otherwise it will be paged out!
+  * MicroBitDisplay* display = new MicroBitDisplay();
+  *
+  * uBit.addSystemComponent(display);
+  *
+  * uBit.removeSystemComponent(display);
+  * @endcode
+  *
+  * @note This interface is now deprecated, and will be removed in the next major release. Please use system_timer_remove_component().
+  */
+inline int MicroBit::removeSystemComponent(MicroBitComponent *component)
+{
+	return system_timer_remove_component(component);
+}
+
+/**
+  * Adds a component to the array of idle thread components, which are processed
+  * when the run queue is empty.
+  *
+  * The system timer will poll isIdleCallbackNeeded on each component to determine
+  * if the scheduler should schedule the idle_task imminently.
+  *
+  * @param component The component to add to the array.
+  *
+  * @return MICROBIT_OK on success or MICROBIT_NO_RESOURCES if the fiber components array is full.
+  *
+  * @code
+  * MicroBitI2C i2c(I2C_SDA0, I2C_SCL0);
+  *
+  * // heap allocated - otherwise it will be paged out!
+  * MicroBitAccelerometer* accelerometer = new MicroBitAccelerometer(i2c);
+  *
+  * fiber_add_idle_component(accelerometer);
+  * @endcode
+  *
+  * @note This interface is now deprecated, and will be removed in the next major release. Please use fiber_add_idle_component().
+  */
+inline int MicroBit::addIdleComponent(MicroBitComponent *component)
+{
+	return fiber_add_idle_component(component);
+}
+
+/**
+  * Remove a component from the array of idle thread components
+  *
+  * @param component The component to remove from the idle component array.
+  *
+  * @return MICROBIT_OK on success. MICROBIT_INVALID_PARAMETER is returned if the given component has not been previously added.
+  *
+  * @code
+  * MicroBitI2C i2c(I2C_SDA0, I2C_SCL0);
+  *
+  * // heap allocated - otherwise it will be paged out!
+  * MicroBitAccelerometer* accelerometer = new MicroBitAccelerometer(i2c);
+  *
+  * uBit.addIdleComponent(accelerometer);
+  *
+  * uBit.removeIdleComponent(accelerometer);
+  * @endcode
+  *
+  * @note This interface is now deprecated, and will be removed in the next major release. Please use fiber_remove_idle_component().
+  */
+inline int MicroBit::removeIdleComponent(MicroBitComponent *component)
+{
+	return fiber_remove_idle_component(component);
+}
+
+
+/**
+  * Determine the time since this MicroBit was last reset.
+  *
+  * @return The time since the last reset, in milliseconds.
+  *
+  * @note This will value overflow after 1.6 months.
+  */
+inline unsigned long MicroBit::systemTime()
+{
+    return system_timer_current_time();
+}
+
+
+/**
+  * Determine the version of the micro:bit runtime currently in use.
+  *
+  * @return A textual description of the version of the micro:bit runtime that
+  *         is currently running on this device.
+  */
+inline const char *MicroBit::systemVersion()
+{
+    return microbit_dal_version();
+}
+
+/**
+  * Triggers a microbit panic where an loop will display a panic face
+  * and the status code, if provided.
+  *
+  * This loop will continue for panic_timeout iterations, defaults to 0 (infinite).
+  *
+  * panic_timeout can be configured via a call to microbit_panic_timeout.
+  *
+  * @param statusCode the status code of the associated error.
+  *
+  * @code
+  * microbit_panic_timeout(4);
+  *
+  * // will display loop for 4 iterations.
+  * uBit.panic(10);
+  * @endcode
+  */
+inline void MicroBit::panic(int statusCode)
+{
+    //show error and enter infinite while
+	microbit_panic(statusCode);
+}
+
+#endif
\ No newline at end of file

diff -r 000000000000 -r ee31ccbe9919 microbit-dal.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/microbit-dal.lib	Mon Dec 23 10:31:28 2019 +0000
@@ -0,0 +1,1 @@
+https://developer.mbed.org/teams/Lancaster-University/code/microbit-dal/#eb91bba49623

diff -r 000000000000 -r ee31ccbe9919 module.json
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/module.json	Mon Dec 23 10:31:28 2019 +0000
@@ -0,0 +1,13 @@
+{
+  "name": "microbit",
+  "version": "2.0.0-rc4",
+  "description": "A simple to use collection of the most commonly used components in the micro:bit runtime",
+  "license": "MIT",
+  "dependencies": {
+    "microbit-dal": "lancaster-university/microbit-dal"
+  },
+  "extraIncludes": [
+    "inc"
+  ],
+  "targetDependencies": {}
+}
\ No newline at end of file

diff -r 000000000000 -r ee31ccbe9919 source/MicroBit.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/MicroBit.cpp	Mon Dec 23 10:31:28 2019 +0000
@@ -0,0 +1,223 @@
+/*
+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.
+*/
+
+#include "MicroBitConfig.h"
+/*
+ * 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...
+ */
+#if !defined(__arm)
+#pragma GCC diagnostic ignored "-Wunused-function"
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+#include "MicroBit.h"
+
+#include "nrf_soc.h"
+
+/*
+ * Return to our predefined compiler settings.
+ */
+#if !defined(__arm)
+#pragma GCC diagnostic pop
+#endif
+
+#if CONFIG_ENABLED(MICROBIT_DBG)
+// We create and initialize to NULL here, but MicroBitSerial will automatically update this as needed in its constructor.
+RawSerial* SERIAL_DEBUG = NULL;
+#endif
+
+/**
+  * Constructor.
+  *
+  * Create a representation of a MicroBit device, which includes member variables
+  * that represent various device drivers used to control aspects of the micro:bit.
+  */
+MicroBit::MicroBit() :
+    serial(USBTX, USBRX),
+	resetButton(MICROBIT_PIN_BUTTON_RESET),
+    storage(),
+    i2c(I2C_SDA0, I2C_SCL0),
+    messageBus(),
+    display(),
+    buttonA(MICROBIT_PIN_BUTTON_A, MICROBIT_ID_BUTTON_A),
+    buttonB(MICROBIT_PIN_BUTTON_B, MICROBIT_ID_BUTTON_B),
+    buttonAB(MICROBIT_ID_BUTTON_A,MICROBIT_ID_BUTTON_B, MICROBIT_ID_BUTTON_AB),
+    accelerometer(i2c),
+    compass(i2c, accelerometer, storage),
+    compassCalibrator(compass, accelerometer, display),
+    thermometer(storage),
+    io(MICROBIT_ID_IO_P0,MICROBIT_ID_IO_P1,MICROBIT_ID_IO_P2,
+       MICROBIT_ID_IO_P3,MICROBIT_ID_IO_P4,MICROBIT_ID_IO_P5,
+       MICROBIT_ID_IO_P6,MICROBIT_ID_IO_P7,MICROBIT_ID_IO_P8,
+       MICROBIT_ID_IO_P9,MICROBIT_ID_IO_P10,MICROBIT_ID_IO_P11,
+       MICROBIT_ID_IO_P12,MICROBIT_ID_IO_P13,MICROBIT_ID_IO_P14,
+       MICROBIT_ID_IO_P15,MICROBIT_ID_IO_P16,MICROBIT_ID_IO_P19,
+       MICROBIT_ID_IO_P20),
+    bleManager(storage),
+    radio(),
+    ble(NULL)
+{
+    // Clear our status
+    status = 0;
+
+    // Bring up soft reset functionality as soon as possible.
+    resetButton.mode(PullUp);
+    resetButton.fall(this, &MicroBit::reset);
+}
+
+/**
+  * Post constructor initialisation method.
+  *
+  * This call will initialised the scheduler, memory allocator and Bluetooth stack.
+  *
+  * This is required as the Bluetooth stack can't be brought up in a
+  * static context i.e. in a constructor.
+  *
+  * @code
+  * uBit.init();
+  * @endcode
+  *
+  * @note This method must be called before user code utilises any functionality
+  *       contained by uBit.
+  */
+void MicroBit::init()
+{
+    if (status & MICROBIT_INITIALIZED)
+        return;
+
+#if CONFIG_ENABLED(MICROBIT_HEAP_ALLOCATOR)
+    // Bring up a nested heap allocator.
+    microbit_create_nested_heap(MICROBIT_NESTED_HEAP_SIZE);
+#endif
+
+    // Bring up fiber scheduler.
+    scheduler_init(messageBus);
+
+    // Seed our random number generator
+    seedRandom();
+
+    // Create an event handler to trap any handlers being created for I2C services.
+    // We do this to enable initialisation of those services only when they're used,
+    // which saves processor time, memeory and battery life.
+    messageBus.listen(MICROBIT_ID_MESSAGE_BUS_LISTENER, MICROBIT_EVT_ANY, this, &MicroBit::onListenerRegisteredEvent);
+
+    status |= MICROBIT_INITIALIZED;
+
+#if CONFIG_ENABLED(MICROBIT_BLE_PAIRING_MODE)
+    // Test if we need to enter BLE pairing mode...
+    int i=0;
+    sleep(100);
+    while (buttonA.isPressed() && buttonB.isPressed() && i<10)
+    {
+        sleep(100);
+        i++;
+
+        if (i == 10)
+        {
+#if CONFIG_ENABLED(MICROBIT_HEAP_ALLOCATOR) && CONFIG_ENABLED(MICROBIT_HEAP_REUSE_SD)
+            microbit_create_heap(MICROBIT_SD_GATT_TABLE_START + MICROBIT_SD_GATT_TABLE_SIZE, MICROBIT_SD_LIMIT);
+#endif
+            // Start the BLE stack, if it isn't already running.
+            if (!ble)
+            {
+                bleManager.init(getName(), getSerial(), messageBus, true);
+                ble = bleManager.ble;
+            }
+
+            // Enter pairing mode, using the LED matrix for any necessary pairing operations
+            bleManager.pairingMode(display, buttonA);
+        }
+    }
+#endif
+
+    // Attempt to bring up a second heap region, using unused memory normally reserved for Soft Device.
+#if CONFIG_ENABLED(MICROBIT_HEAP_ALLOCATOR) && CONFIG_ENABLED(MICROBIT_HEAP_REUSE_SD)
+#if CONFIG_ENABLED(MICROBIT_BLE_ENABLED)
+    microbit_create_heap(MICROBIT_SD_GATT_TABLE_START + MICROBIT_SD_GATT_TABLE_SIZE, MICROBIT_SD_LIMIT);
+#else
+    microbit_create_heap(MICROBIT_SRAM_BASE, MICROBIT_SD_LIMIT);
+#endif
+#endif
+
+#if CONFIG_ENABLED(MICROBIT_BLE_ENABLED)
+    // Start the BLE stack, if it isn't already running.
+    if (!ble)
+    {
+        bleManager.init(getName(), getSerial(), messageBus, false);
+        ble = bleManager.ble;
+    }
+#endif
+}
+
+/**
+  * A listener to perform actions as a result of Message Bus reflection.
+  *
+  * In some cases we want to perform lazy instantiation of components, such as
+  * the compass and the accelerometer, where we only want to add them to the idle
+  * fiber when someone has the intention of using these components.
+  */
+void MicroBit::onListenerRegisteredEvent(MicroBitEvent evt)
+{
+    switch(evt.value)
+    {
+        case MICROBIT_ID_BUTTON_AB:
+            // A user has registered to receive events from the buttonAB multibutton.
+            // Disable click events from being generated by ButtonA and ButtonB, and defer the
+            // control of this to the multibutton handler.
+            //
+            // This way, buttons look independent unless a buttonAB is requested, at which
+            // point button A+B clicks can be correclty handled without breaking
+            // causal ordering.
+            buttonA.setEventConfiguration(MICROBIT_BUTTON_SIMPLE_EVENTS);
+            buttonB.setEventConfiguration(MICROBIT_BUTTON_SIMPLE_EVENTS);
+            buttonAB.setEventConfiguration(MICROBIT_BUTTON_ALL_EVENTS);
+            break;
+
+        case MICROBIT_ID_COMPASS:
+            // A listener has been registered for the compass.
+            // The compass uses lazy instantiation, we just need to read the data once to start it running.
+            // Touch the compass through the heading() function to ensure it is calibrated. if it isn't this will launch any associated calibration algorithms.
+            compass.heading();
+
+            break;
+
+        case MICROBIT_ID_ACCELEROMETER:
+        case MICROBIT_ID_GESTURE:
+            // A listener has been registered for the accelerometer.
+            // The accelerometer uses lazy instantiation, we just need to read the data once to start it running.
+            accelerometer.updateSample();
+            break;
+
+        case MICROBIT_ID_THERMOMETER:
+            // A listener has been registered for the thermometer.
+            // The thermometer uses lazy instantiation, we just need to read the data once to start it running.
+            thermometer.updateSample();
+            break;
+    }
+}
\ No newline at end of file