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Instructions on how to flash via STM32 bootloader (#4316) 

* Add instructions on flashing ARM keyboards with default STM32 bootloader

* fixed typo; added note suggestion to step 4
This commit is contained in:
Michael Pio 2018-11-04 01:08:05 +08:00 committed by Jack Humbert
parent 0633eb0273
commit 292a87ad04
1 changed files with 27 additions and 4 deletions
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docs/flashing.md
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@ -71,8 +71,8 @@ Flashing sequence:
1. Press the `RESET` keycode, or short RST to GND quickly (you only have 7 seconds to flash once it enters)
2. Wait for the OS to detect the device
4. Flash a .hex file
5. Wait for the device to reset automatically
3. Flash a .hex file
4. Wait for the device to reset automatically
or
@ -106,5 +106,28 @@ Flashing sequence:
1. Press the `RESET` keycode, or short RST to GND quickly (you only have 7 seconds to flash once it enters)
2. Wait for the OS to detect the device
4. Flash a .hex file
5. Reset the device into application mode (may be done automatically)
3. Flash a .hex file
4. Reset the device into application mode (may be done automatically)
## STM32
All STM32 chips come preloaded with a factory bootloader that cannot be modified nor deleted. Some STM32 chips have bootloaders that do not come with USB programming (e.g. STM32F103) but the process is still the same.
At the moment, no `BOOTLOADER` variable is needed on `rules.mk` for STM32.
Compatible flashers:
* [QMK Toolbox](https://github.com/qmk/qmk_toolbox/releases) (recommended GUI)
* [dfu-util](https://github.com/Stefan-Schmidt/dfu-util) / `:dfu-util` (recommended command line)
Flashing sequence:
1. Enter the bootloader using any of the following methods:
* Tap the `RESET` keycode (may not work on STM32F042 devices)
* If a reset circuit is present, tap the RESET button
* Otherwise, you need to bridge BOOT0 to VCC (via BOOT0 button or bridge), short RESET to GND (via RESET button or bridge), and then let go of the BOOT0 bridge
2. Wait for the OS to detect the device
3. Flash a .bin file
* You will receive a warning about the DFU signature; Just ignore it
4. Reset the device into application mode (may be done automatically)
* If you are building from command line (e.g. `make planck/rev6:default:dfu-util`), make sure that `:leave` is passed to the `DFU_ARGS` variable inside your `rules.mk` (e.g. `DFU_ARGS = -d 0483:df11 -a 0 -s 0x08000000:leave`) so that your device resets after flashing