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| author | Thorsten von Eicken <tve@users.noreply.github.com> | 2020-04-24 09:50:38 -0700 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2020-05-11 21:23:41 +1000 |
| commit | f385b7bfa86aa4657d4a28971a63b8681e1403e2 (patch) | |
| tree | 7a1f9299d69bf63d199f8d4882001b23e5663ad0 | |
| parent | ab4e197707cd456499d680091fdc9daeff18c62a (diff) | |
| download | micropython-f385b7bfa86aa4657d4a28971a63b8681e1403e2.tar.gz micropython-f385b7bfa86aa4657d4a28971a63b8681e1403e2.zip | |
stm32/README: Reorg DFU flashing instructions with addition for PYBD.
| -rw-r--r-- | ports/stm32/README.md | 30 |
1 files changed, 25 insertions, 5 deletions
diff --git a/ports/stm32/README.md b/ports/stm32/README.md index f5ac362a81..f2fdb4dd3b 100644 --- a/ports/stm32/README.md +++ b/ports/stm32/README.md @@ -53,11 +53,31 @@ The default board is PYBV10 but any of the names of the subdirectories in the should produce binary images in the `build-PYBV11/` subdirectory (or the equivalent directory for the board specified). -You must then get your board/microcontroller into DFU mode. On the pyboard -connect the 3V3 pin to the P1/DFU pin with a wire (they are next to each -other on the bottom left of the board, second row from the bottom) and then -reset (by pressing the RST button) or power on the board. Then flash the -firmware using the command: + +### Flashing the Firmware using DFU mode + +You must then get your board/microcontroller into DFU (Device Firmware +Update) mode. + +If you already have MicroPython installed on the board you can do that by +calling `machine.bootloader()` on the board, either at the REPL or using +`pyboard.py`. A nice property of this approach is that you can automate it +so you can update the board without manually pressing any buttons. + +If you do not have MicroPython running yet, temporarily jumper your board's +DFU pin (typ. BOOT0) to 3.3v and reset or power-on the board. + +On a pyboard the P1/DFU pin and a 3.3v pin are next to each other (on the +bottom left of the board, second row from the bottom) and the reset button +is labeled RST. + +For the pyboard D-series you can enter the mboot DFU bootloader by holding down +the USR button, pressing and releasing the RST button, and continuing to hold +down USR until the LED is white (4th in the cycle), then let go of USR while +the LED is white. The LED will then flash red once per second to indicate it +is in USB DFU mode. + +Once the board is in DFU mode, flash the firmware using the command: $ make BOARD=PYBV11 deploy |