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Flashing tool over CAN and external circuit for boot pins

Question asked by mubin.icyer on May 26, 2014
Latest reply on May 26, 2014 by Clive One
Is there any flash tool for linux (or windows) over CAN-bus? STM32F105 is capable to boot from CAN-bus but I didn't find any tool for that.
What is the best way to boot the chip from system memory without accessing to it for changing the boot pins. My idea is following, correct me if it is wrong:
An external circuitry is needed to change the boot pins before reset the chip and hold the pins during  reset. After reset, the chip will run the bootloader. What is the "best" way to design such a circuitry? CMOS series Flip-Flop?