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Added note nrfutil and flashing

This commit is contained in:
Kevin Townsend 2018-02-15 16:00:34 +01:00
parent 70596b6641
commit cd7baed14d
1 changed files with 45 additions and 4 deletions
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49
ports/nrf/boards/feather52840/README.md
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@ -138,7 +138,7 @@ J-Link>exit
### Installing `nrfutil`
If you haven't installed the required command-line tool yet, go to the
`/libs/nrfutil` folder (where nrfutil 0.5.2 is installed as a sub-module)
`/libs/nrfutil` folder (where nrfutil 0.5.2b is installed as a sub-module)
and run the following commands:
> If you get a 'sudo: pip: command not found' error running 'sudo pip install',
@ -150,11 +150,52 @@ $ sudo pip install -r requirements.txt
$ sudo python setup.py install
```
#### Changes to `nrfutil` in 0.5.2b
**IMPORTANT**: Make sure that you have version **0.5.2b**, since a small
change was required to `dfu_transport_serial.py` to account for the
increased minimum flash erase time on the nRF52840 compared to the earlier
nRF52832!
You can also manually change the file with the following new values (lines
67-68), and reinstall the utility via `sudo python setup.py install`:
```
FLASH_PAGE_ERASE_MAX_TIME = 0.1 # Worst time to erase a page 100 ms
FLASH_PAGE_ERASE_MIN_TIME = 0.09 # Best time to erase a page 90 ms
```
### Flashing CircuitPython
With the serial bootloader present on your board, you can build and flash
a CircuitPython binary via the following command:
With the serial bootloader present on your board, you first need to force your
board into DFU mode by holding down BUTTON1 and RESETTING the board (with
BUTTON1 still pressed as you come out of reset).
This will give you a **fast blinky DFU pattern** to indicate you are in DFU
mode.
At this point, you can build and flash a CircuitPython binary via the following
command:
```
make SD=s140 SERIAL=/dev/ttyACM0 BOARD=feather52840 dfu-gen dfu-flash
$ make V=1 SD=s140 SERIAL=/dev/tty.usbmodem1411 BOARD=feather52840 dfu-gen dfu-flash
```
This should give you the following results:
```
$ make V=1 SD=s140 SERIAL=/dev/tty.usbmodem1411 BOARD=feather52840 dfu-gen dfu-flash
nrfutil dfu genpkg --sd-req 0xFFFE --dev-type 0x0052 --application build-feather52840-s140/firmware.hex build-feather52840-s140/dfu-package.zip
Zip created at build-feather52840-s140/dfu-package.zip
nrfutil --verbose dfu serial --package build-feather52840-s140/dfu-package.zip -p /dev/tty.usbmodem1411 -b 115200
Upgrading target on /dev/tty.usbmodem1411 with DFU package /Users/kevintownsend/Dropbox/microBuilder/Code/CircuitPython/circuitpython-mb/ports/nrf/build-feather52840-s140/dfu-package.zip. Flow control is disabled.
Starting DFU upgrade of type 4, SoftDevice size: 0, bootloader size: 0, application size: 195252
Sending DFU start packet
Sending DFU init packet
Sending firmware file
################################################################################################################################################################################################################################################################################################################################################################################################
Activating new firmware
DFU upgrade took 41.6610329151s
Device programmed.
```