Merge branch 'usbboot' of github.com:microbuilder/circuitpython into usbboot
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commit
dadf831fe9
@ -74,7 +74,7 @@ nrfjprog version: 9.7.2
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JLinkARM.dll version: 6.20f
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```
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### Flash the Bootloader with `nrfjprog`
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### Option 1 (nRF52832 or nRF52840): Flash the HW UART Bootloader with `nrfjprog`
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> This operation only needs to be done once, and only on boards that don't
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already have the serial bootloader installed.
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@ -105,6 +105,37 @@ Run.
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From this point onward, you can now use a simple serial port for firmware
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updates.
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### Option 2 (nRF52840): Flash the USB CDC Bootloader with 'nrfjprog'
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> This operation only needs to be done once, and only on boards that don't
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already have the serial bootloader installed.
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Once `nrfjprog` is installed and available in `PATH` you can flash your
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board with the serial bootloader via the following command:
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```
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make SD=s140 BOARD=feather52840 boot-usb-flash
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```
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This should give you the following (or very similar) output, and you will see
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a DFU blinky pattern on one of the board LEDs:
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```
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$ make SD=s140 BOARD=feather52840 boot-usb-flash
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Use make V=1, make V=2 or set BUILD_VERBOSE similarly in your environment to increase build verbosity.
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nrfjprog --program boards/feather52840/bootloader/usb/feather52840_bootloader_6.0.0_s140_single.hex -f nrf52 --chiperase --reset
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Parsing hex file.
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Erasing user available code and UICR flash areas.
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Applying system reset.
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Checking that the area to write is not protected.
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Programing device.
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Applying system reset.
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Run.
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```
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From this point onward, you can now use a simple serial port for firmware
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updates.
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### IMPORTANT: Disable Mass Storage on PCA10056 J-Link
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The J-Link firmware on the PCA10056 implement USB Mass Storage, but this
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@ -174,11 +205,11 @@ BUTTON1 still pressed as you come out of reset).
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This will give you a **fast blinky DFU pattern** to indicate you are in DFU
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mode.
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At this point, you can build and flash a CircuitPython binary via the following
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At this point, you can **build and flash** a CircuitPython binary via the following
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command:
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```
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$ make V=1 SD=s140 SERIAL=/dev/tty.usbmodem1411 BOARD=feather52840 dfu-gen dfu-flash
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$ make V=1 SD=s140 SERIAL=/dev/tty.usbmodem1411 BOARD=feather52840 all dfu-gen dfu-flash
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```
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This should give you the following results:
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