e754ecf3aa
Added configuration option in MicroBitConfig to allow the default power level to be defined. Based on experiments undertaken by the BBC and subsequent policies defined by the BBC's child protection panel, to is set by default it's lowest level (0), in order to protect children's privacy. It should be noted that this is 30dB below the device's default setting, so will inevitably leave the device more susceptible to interference, and therefore significantly reduce the reliability of the device. This will likely present itself through increased packet loss, reduced thorughout, lost data and connection drop outs. The normal BLE power level on commercial devices translates to power level of 6. The author has witnessed an inability to connect to a micro:bit from a distance of 40cm under domestic conditions using a Samsung S5 mini running Android 4.4.2. |
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| docs | ||
| inc | ||
| source | ||
| .gitignore | ||
| CHANGES.md | ||
| README.md | ||
| module.json | ||
README.md
microbit-dal
Building a project for the micro:bit using Yotta
Instead of using the online IDE, Yotta can be used to provide an equivalent offline experience. The current compilers that are available are:
- GCC
- ARMCC
Getting Started
1. Install Yotta
The first step is to get Yotta onto your machine, to do this follow the install guide here
Note: if you are on windows, dependencies will be missed as of 8/8/15, please use the helper script located here.
2. Fetch the example project
If your install has gone correctly, and you have all dependencies installed, the next step is to fetch the example project using the runtime from GitHub.
git clone https://github.com/lancaster-university/microbit
Note: To successfully build this project you will need access to the microbit-dal private repository, if you need access please email me at j.devine@lancaster.ac.uk.
3. Try to build
Building rarely works first time due to dependencies currently not being installed by Yotta, so the next step is to try to build.
The default yotta target you will receive when you pull the aforementioned repo is bbc-microbit-classic-armcc, you can use the following command to print your current target in Yotta:
yt target
bbc-microbit-classic-armcc 0.0.5
mbed-armcc 0.0.8
If you do not have armcc installed (or don't have a license for Keil), then you will need to use GCC. To swap to the GCC target run:
yt target bbc-microbit-classic-gcc
Then you should try to build using the following command:
yt build
NOTE:
To build the final hex files for the micro:bit, you will need to install the srec which can be installed via brew (brew install srecord), or you can install it manually from here.
4. Flash your micro:bit
The final step is to check your hex works.
The yotta build command will place files in /build/<TARGET_NAME>/source. The file you will need to flash will be microbit-combined.hex. Simply drag and drop the hex.
The expected result will be that the micro:bit will scroll BELLO! :) on its display.