Convert README to markdown

Author: ivankravets

examples/mbed-legacy-examples/mbed-blink/README.md

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+How to build PlatformIO based project
+=====================================
+
+1. [Install PlatformIO Core](http://docs.platformio.org/page/core.html)
+2. Download [development platform with examples](https://github.com/platformio/platform-nxplpc/archive/develop.zip)
+3. Extract ZIP archive
+4. Run these commands:
+
+```shell
+# Change directory to example
+$ cd platform-nxplpc/examples/mbed-legacy-examples/mbed-blink
+
+# Build project
+$ pio run
+
+# Upload firmware
+$ pio run --target upload
+
+# Build specific environment
+$ pio run -e lpc1549
+
+# Upload firmware for the specific environment
+$ pio run -e lpc1549 --target upload
+
+# Clean build files
+$ pio run --target clean
+```

examples/mbed-legacy-examples/mbed-blink/README.rst

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+How to build PlatformIO based project
+=====================================
+
+1. [Install PlatformIO Core](http://docs.platformio.org/page/core.html)
+2. Download [development platform with examples](https://github.com/platformio/platform-nxplpc/archive/develop.zip)
+3. Extract ZIP archive
+4. Run these commands:
+
+```shell
+# Change directory to example
+$ cd platform-nxplpc/examples/mbed-legacy-examples/mbed-dsp
+
+# Build project
+$ pio run
+
+# Upload firmware
+$ pio run --target upload
+
+# Build specific environment
+$ pio run -e lpc4088
+
+# Upload firmware for the specific environment
+$ pio run -e lpc4088 --target upload
+
+# Clean build files
+$ pio run --target clean
+```

examples/mbed-legacy-examples/mbed-dsp/README.md

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+How to build PlatformIO based project
+=====================================
+
+1. [Install PlatformIO Core](http://docs.platformio.org/page/core.html)
+2. Download [development platform with examples](https://github.com/platformio/platform-nxplpc/archive/develop.zip)
+3. Extract ZIP archive
+4. Run these commands:
+
+```shell
+# Change directory to example
+$ cd platform-nxplpc/examples/mbed-legacy-examples/mbed-events
+
+# Build project
+$ pio run
+
+# Upload firmware
+$ pio run --target upload
+
+# Build specific environment
+$ pio run -e lpc11u35
+
+# Upload firmware for the specific environment
+$ pio run -e lpc11u35 --target upload
+
+# Clean build files
+$ pio run --target clean
+```

examples/mbed-legacy-examples/mbed-dsp/README.rst

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+How to build PlatformIO based project
+=====================================
+
+1. [Install PlatformIO Core](http://docs.platformio.org/page/core.html)
+2. Download [development platform with examples](https://github.com/platformio/platform-nxplpc/archive/develop.zip)
+3. Extract ZIP archive
+4. Run these commands:
+
+```shell
+# Change directory to example
+$ cd platform-nxplpc/examples/mbed-legacy-examples/mbed-rtos-ethernet
+
+# Build project
+$ pio run
+
+# Upload firmware
+$ pio run --target upload
+
+# Clean build files
+$ pio run --target clean
+```

examples/mbed-legacy-examples/mbed-events/README.md

@@ -0,0 +1,27 @@
+How to build PlatformIO based project
+====================================
+
+1. [Install PlatformIO Core](http://docs.platformio.org/page/core.html)
+2. Download [development platform with examples](https://github.com/platformio/platform-nxplpc/archive/develop.zip)
+3. Extract ZIP archive
+4. Run these commands:
+
+```shell
+# Change directory to example
+$ cd platform-nxplpc/examples/mbed-legacy-examples/mbed-rtos
+
+# Build project
+$ pio run
+
+# Upload firmware
+$ pio run --target upload
+
+# Build specific environment
+$ pio run -e lpc1768
+
+# Upload firmware for the specific environment
+$ pio run -e lpc1768 --target upload
+
+# Clean build files
+$ pio run --target clean
+```