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13 lines
714 B
Markdown
13 lines
714 B
Markdown
# Bootloader
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The bootloader is a small (~10K) application that occupies the first few pages of flash at 0x0800000.
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Its only purpose is to determine whether an application is installed by inspecting a specific Flash page for special metadata.
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If the application is installed it just passes control to it, otherwise it enters UART software upload mode.
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When an upload completes, the bootloader writes the special metadata page and resets the system, which will
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cause its next reincarnation to launch the application.
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When the application receives a command to start a "software update", it will simply erase the special metadata
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and reset the system, which will cause the bootloader to enter UART upload mode.
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