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README: Improve sunxi-fel help with a few hints

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Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>
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Bernhard Nortmann 2016-12-01 17:07:09 +01:00
parent 445b1747e5
commit b5ba2d3b49
1 changed files with 12 additions and 4 deletions
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README.md
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@ -30,10 +30,18 @@ compatiblity shortcut to call `sunxi-fexc` to compile a `.fex` file
into the binary form used by the legacy 3.4 kernel ("linux&#8209;sunxi").
### sunxi-fel
script interface for talking to the FEL USB handler built in to
the CPU. You activate [FEL mode] by pushing the _uboot_ / _recovery_
button at poweron. See http://linux-sunxi.org/FEL/USBBoot for
a detailed usage guide.
script interface for USB communication with the FEL handler built in to
the CPU. You usually activate [FEL mode] by pushing the _uboot_ / _recovery_
button at poweron, or by having your device "fail over" to FEL when no other
boot option is available. See http://linux-sunxi.org/FEL/USBBoot for a detailed
usage guide.
When called with no arguments, _sunxi-fel_ will display a short usage summary.
_Note:_ Unless you select a specific device using the `--dev` or `--sid`
options, the tool will access the first Allwinner device (in FEL mode) that it
finds. You can print a list of all FEL devices currently connected/detected
with `./sunxi-fel --list`.
### fel-gpio
Simple wrapper (script) around `fel-pio` and `sunxi-fel`