diff options
-rw-r--r-- | README.md | 16 |
1 files changed, 12 insertions, 4 deletions
@@ -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‑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` |