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Diffstat (limited to 'docs/Bootloaders.md')
| -rwxr-xr-x | docs/Bootloaders.md | 38 |
1 files changed, 31 insertions, 7 deletions
diff --git a/docs/Bootloaders.md b/docs/Bootloaders.md index 94b9b0dd..830077ef 100755 --- a/docs/Bootloaders.md +++ b/docs/Bootloaders.md @@ -209,11 +209,11 @@ avrdude -c stk500v2 -p atmega2560 -P /dev/ttyACM0 -u -Uflash:w:out/klipper.elf.h STM32F103 micro-controllers (Blue Pill devices) =============================================== -The STM32F103 devices have a ROM that can flash a bootloader via 3.3V -serial. To access this ROM, one should connect the "boot 0" pin to -high and "boot 1" pin to low, and then reset the device. The -"stm32flash" package can then be used to flash the device using -something like: +The STM32F103 devices have a ROM that can flash a bootloader or +application via 3.3V serial. To access this ROM, one should connect +the "boot 0" pin to high and "boot 1" pin to low, and then reset the +device. The "stm32flash" package can then be used to flash the device +using something like: ``` stm32flash -w out/klipper.bin -v -g 0 /dev/ttyAMA0 ``` @@ -224,8 +224,32 @@ stm32flash protocol uses a serial parity mode which the Raspberry Pi's https://www.raspberrypi.org/documentation/configuration/uart.md for details on enabling the full uart on the Raspberry Pi GPIO pins. -This document does not describe the method to flash an application via -an STM32F103 bootloader. +After flashing, set both "boot 0" and "boot 1" back to low so that +future resets boot from flash. + +## STM32F103 with stm32duino bootloader ## + +The "stm32duino" project has a USB capable bootloader - see: +https://github.com/rogerclarkmelbourne/STM32duino-bootloader + +This bootloader can be flashed via 3.3V serial with something like: +``` +wget 'https://github.com/rogerclarkmelbourne/STM32duino-bootloader/raw/master/binaries/generic_boot20_pc13.bin' +stm32flash -w generic_boot20_pc13.bin -v -g 0 /dev/ttyAMA0 +``` + +This bootloader uses 8KiB of flash space (the application must be +compiled with a start address of 8KiB). Flash an application with +something like: +``` +dfu-util -d 1eaf:0003 -a 2 -R -D out/klipper.bin +``` + +The bootloader typically runs for only a short period after boot. It +may be necessary to time the above command so that it runs while the +bootloader is still active (the bootloader will flash a board led +while it is running). Alternatively, set the "boot 0" pin to low and +"boot 1" pin to high to stay in the bootloader after a reset. LPC176x micro-controllers (Smoothieboards) ========================================== |