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bootloaders/riotboot_dfu: update doc now that DFU_ALT gets set

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dylad 2021-03-26 22:46:29 +01:00
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bootloaders/riotboot_dfu/doc.txt
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@ -55,9 +55,8 @@ $ FEATURES_REQUIRED+=riotboot USEMODULE+=usbus_dfu make -C examples/saul BOARD=p
```
Note that when building and flashing a different slot (eg. `flash-slot1`),
the DFU utility has to be explicitly prompted to upload it the other slot
by adding a `DFU_ALT=1` argument.
not only is the image built for that slot, but also dfu-util gets passed
`--alt 1` (via the `DFU_ALT` build variable) to store it in the right place.
# Entering DFU mode
When RIOT applications are built with `USEMODULE+=usbus_dfu`,