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The bare-arm port
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This port is intended to be the bare-minimum amount of code and configuration
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required to get MicroPython compiling and running on a bare-metal ARM-based
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target. No external dependencies or libraries are needed for this build and
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it shows exactly what hardware and system functionality MicroPython needs to
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run.
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To build, simply run `make` in this directory. The output will be
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`build/firmware.elf` (and also corresponding `.bin` and `.dfu` files). This
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firmware can run on an STM32F405-based board (eg a PYBv1.x) and `make deploy`
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will program it to such an MCU when put in USB DFU mode. The output is a UART
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at 115200 baud, with TX on PA0.
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There are some simple demonstration code strings (see `main.c`) which are
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compiled and executed when the firmware starts. They produce output on the
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system's stdout.
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The size of the firmware (the machine code that is programmed to the
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microcontroller's flash/ROM) is currently around 56500 bytes.
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