423 B
423 B
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. feaser uses it's custom (?) update protocol using two CAN PIDs.
This was tested on https://www.peak-system.com/PCAN-USB.199.0.html?&L=1