Jaydeep Shah / Mbed OS 13) SEMAPHORE_PART4_ADVANCE

SEMAPHORE ADVANCE PART 4 EXAMPLE OF COUNTING SEMAPHORE IN MBED OS FOR PROTECTING CRITICAL SECTION OF SHARED RESOURCES TARGET BOARD NUCLEO - 64 OS PLATFORM : MBED CREATED BY : JAYDEEP SHAH -- radhey04ec@gmail.com

README.md@1:d3e6b9a8a9c2, 2020-07-15 (annotated)

Committer:
radhey04ec
Date:
Wed Jul 15 03:34:47 2020 +0000
Revision:
1:d3e6b9a8a9c2
Parent:
0:2de8a221f1d2 
SEMAPHORE ADVANCE PART 4 FINAL COMMITED; EXAMPLE OF USING COUNTING SEMAPHORE; TARGET NUCLEO 64

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radhey04ec 0:2de8a221f1d2 1 ![](./resources/official_armmbed_example_badge.png)
radhey04ec 0:2de8a221f1d2 2 # Blinky Mbed OS example
radhey04ec 0:2de8a221f1d2 3
radhey04ec 0:2de8a221f1d2 4 The example project is part of the [Arm Mbed OS Official Examples](https://os.mbed.com/code/) and is the [getting started example for Mbed OS](https://os.mbed.com/docs/mbed-os/v5.14/quick-start/index.html). It contains an application that repeatedly blinks an LED on supported [Mbed boards](https://os.mbed.com/platforms/).
radhey04ec 0:2de8a221f1d2 5
radhey04ec 0:2de8a221f1d2 6 You can build the project with all supported [Mbed OS build tools](https://os.mbed.com/docs/mbed-os/latest/tools/index.html). However, this example project specifically refers to the command-line interface tool [Arm Mbed CLI](https://github.com/ARMmbed/mbed-cli#installing-mbed-cli).
radhey04ec 0:2de8a221f1d2 7 (Note: To see a rendered example you can import into the Arm Online Compiler, please see our [import quick start](https://os.mbed.com/docs/mbed-os/latest/quick-start/online-with-the-online-compiler.html#importing-the-code).)
radhey04ec 0:2de8a221f1d2 8
radhey04ec 0:2de8a221f1d2 9 1. [Install Mbed CLI](https://os.mbed.com/docs/mbed-os/latest/quick-start/offline-with-mbed-cli.html).
radhey04ec 0:2de8a221f1d2 10
radhey04ec 0:2de8a221f1d2 11 1. Clone this repository on your system, and change the current directory to where the project was cloned:
radhey04ec 0:2de8a221f1d2 12
radhey04ec 0:2de8a221f1d2 13 ```bash
radhey04ec 0:2de8a221f1d2 14 $ git clone git@github.com:armmbed/mbed-os-example-blinky && cd mbed-os-example-blinky
radhey04ec 0:2de8a221f1d2 15 ```
radhey04ec 0:2de8a221f1d2 16
radhey04ec 0:2de8a221f1d2 17 Alternatively, you can download the example project with Arm Mbed CLI using the `import` subcommand:
radhey04ec 0:2de8a221f1d2 18
radhey04ec 0:2de8a221f1d2 19 ```bash
radhey04ec 0:2de8a221f1d2 20 $ mbed import mbed-os-example-blinky && cd mbed-os-example-blinky
radhey04ec 0:2de8a221f1d2 21 ```
radhey04ec 0:2de8a221f1d2 22
radhey04ec 0:2de8a221f1d2 23
radhey04ec 0:2de8a221f1d2 24 ## Application functionality
radhey04ec 0:2de8a221f1d2 25
radhey04ec 0:2de8a221f1d2 26 The `main()` function is the single thread in the application. It toggles the state of a digital output connected to an LED on the board.
radhey04ec 0:2de8a221f1d2 27
radhey04ec 0:2de8a221f1d2 28 ## Building and running
radhey04ec 0:2de8a221f1d2 29
radhey04ec 0:2de8a221f1d2 30 1. Connect a USB cable between the USB port on the board and the host computer.
radhey04ec 0:2de8a221f1d2 31 2. <a name="build_cmd"></a> Run the following command to build the example project and program the microcontroller flash memory:
radhey04ec 0:2de8a221f1d2 32 ```bash
radhey04ec 0:2de8a221f1d2 33 $ mbed compile -m <TARGET> -t <TOOLCHAIN> --flash
radhey04ec 0:2de8a221f1d2 34 ```
radhey04ec 0:2de8a221f1d2 35 The binary is located at `./BUILD/<TARGET>/<TOOLCHAIN>/mbed-os-example-blinky.bin`.
radhey04ec 0:2de8a221f1d2 36
radhey04ec 0:2de8a221f1d2 37 Alternatively, you can manually copy the binary to the board, which you mount on the host computer over USB.
radhey04ec 0:2de8a221f1d2 38
radhey04ec 0:2de8a221f1d2 39 Depending on the target, you can build the example project with the `GCC_ARM`, `ARM` or `IAR` toolchain. After installing Arm Mbed CLI, run the command below to determine which toolchain supports your target:
radhey04ec 0:2de8a221f1d2 40
radhey04ec 0:2de8a221f1d2 41 ```bash
radhey04ec 0:2de8a221f1d2 42 $ mbed compile -S
radhey04ec 0:2de8a221f1d2 43 ```
radhey04ec 0:2de8a221f1d2 44
radhey04ec 0:2de8a221f1d2 45 ## Expected output
radhey04ec 0:2de8a221f1d2 46 The LED on your target turns on and off every 500 milliseconds.
radhey04ec 0:2de8a221f1d2 47
radhey04ec 0:2de8a221f1d2 48
radhey04ec 0:2de8a221f1d2 49 ## Troubleshooting
radhey04ec 0:2de8a221f1d2 50 If you have problems, you can review the [documentation](https://os.mbed.com/docs/latest/tutorials/debugging.html) for suggestions on what could be wrong and how to fix it.
radhey04ec 0:2de8a221f1d2 51
radhey04ec 0:2de8a221f1d2 52 ## Related Links
radhey04ec 0:2de8a221f1d2 53
radhey04ec 0:2de8a221f1d2 54 * [Mbed OS Stats API](https://os.mbed.com/docs/latest/apis/mbed-statistics.html).
radhey04ec 0:2de8a221f1d2 55 * [Mbed OS Configuration](https://os.mbed.com/docs/latest/reference/configuration.html).
radhey04ec 0:2de8a221f1d2 56 * [Mbed OS Serial Communication](https://os.mbed.com/docs/latest/tutorials/serial-communication.html).
radhey04ec 0:2de8a221f1d2 57 * [Mbed OS bare metal](https://os.mbed.com/docs/mbed-os/latest/reference/mbed-os-bare-metal.html).
radhey04ec 0:2de8a221f1d2 58 * [Mbed boards](https://os.mbed.com/platforms/).
radhey04ec 0:2de8a221f1d2 59
radhey04ec 0:2de8a221f1d2 60 ### License and contributions
radhey04ec 0:2de8a221f1d2 61
radhey04ec 0:2de8a221f1d2 62 The software is provided under Apache-2.0 license. Contributions to this project are accepted under the same license. Please see contributing.md for more info.
radhey04ec 0:2de8a221f1d2 63
radhey04ec 0:2de8a221f1d2 64 This project contains code from other projects. The original license text is included in those source files. They must comply with our license guide.