Created Firmware update via CAN (markdown)

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rusefillc 2021-10-30 08:28:18 -04:00
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## technical info
STM32 hard-coded bootloader support CAN firmware update but only on specific hardware pins PB5 PB13 which conflict with SPI hardware pins, weird not great option for us.
http://www.feaser.com is an open source bootloader which allows CAN firmware update via pins.