Mpflash - : use 1200 Bd to reset boards to bootloader

[Josverl]

https://github.com/micropython/micropython/discussions/14395#discussioncomment-9532681

And

https://forums.raspberrypi.com/viewtopic.php?t=350680 https://forums.raspberrypi.com/viewtopic.php?p=2091679#p2091679

pico code: #define PICO_STDIO_USB_RESET_MAGIC_BAUD_RATE 1200 https://github.com/raspberrypi/pico-sdk/blob/6a7db34ff63345a7badec79ebea3aaef1712f374/src/rp2_common/pico_stdio_usb/reset_interface.c#L101-L113

Arduino IDE reset : https://github.com/arduino/Arduino/blob/89539b1131f8cde9f7a83225f21c811071af53a8/arduino-core/src/processing/app/Serial.java#L98-L117

[Josverl]

Sample scripts:

• https://github.com/nicholaskell/Arduino_Loader/blob/master/reset.py (Py2)
• https://github.com/synthetos/g2/blob/1fb59404dcbf6e827f54b2c3146d8d1cab561c90/g2core/utils/g2flash.py#L80-L91
• https://github.com/OctoPrint/OctoPrint-FirmwareUpdater/blob/cfb744a4d86186afb686cdd8fdc242227a922486/octoprint_firmwareupdater/methods/bossac.py#L115-L133
• https://github.com/Sensirion/wearable-dev-kit-firmware/blob/2e503c7360b30d8ecb9597bb310f93e7a655e534/scripts/flash_Arduino_hex_file.py#L53-L61
• AVRDude
  • linux : https://github.com/Merlin04/pmft/blob/60f3f7cfaf90800ca807ec84d9f8db4174863ff4/pmft-linux/avrdude-linux/pmft-flasher.py#L23-L47
  • Win : https://github.com/Merlin04/pmft/blob/60f3f7cfaf90800ca807ec84d9f8db4174863ff4/pmft-win/avrdude-win/pmft-flasher.py#L23-L49

[Josverl]

Discussion: https://github.com/orgs/micropython/discussions/15306

Arduino - AVR: https://arduino.stackexchange.com/questions/32736/how-is-the-bootloader-activated-when-device-is-running