mirror of
https://github.com/DarkFlippers/unleashed-firmware.git
synced 2024-11-23 19:00:43 +03:00
120 lines
3.8 KiB
Markdown
120 lines
3.8 KiB
Markdown
# Key Combos {#key_combos}
|
|
|
|
There are times when your Flipper feels blue and doesn't respond to any of your commands due to a software issue. This guide will help you solve this problem.
|
|
|
|
## Basic combos
|
|
|
|
### Hardware reset
|
|
|
|
- Press `LEFT` and `BACK` and hold for a couple of seconds
|
|
- Release `LEFT` and `BACK`
|
|
|
|
This combo performs a hardware reset by pulling the MCU reset line down.
|
|
Main components involved: Keys -> DD8(NC7SZ32M5X, OR-gate) -> DD1(STM32WB55, MCU).
|
|
|
|
It won't work only in one case:
|
|
|
|
- The MCU debug block is active and holding the reset line from inside.
|
|
|
|
### Hardware Power Reset
|
|
|
|
- Disconnect the USB cable and any external power supplies
|
|
- Disconnect the USB once again
|
|
- Make sure you've disconnected the USB and any external power supplies
|
|
- Press `BACK` and hold for 30 seconds (this will only work with the USB disconnected)
|
|
- If you haven't disconnected the USB, then disconnect it and repeat the previous step
|
|
- Release the `BACK` key
|
|
|
|
This combo performs a reset by switching SYS power line off and then on.
|
|
Main components involved: Keys -> DD6(bq25896, charger).
|
|
|
|
It won't work only in one case:
|
|
|
|
- Power supply is connected to USB or 5V_ext
|
|
|
|
### Software DFU
|
|
|
|
- Press `LEFT` on boot to enter DFU with Flipper boot-loader
|
|
|
|
It won't work only in one case:
|
|
|
|
- Flipper boot-loader is damaged or absent
|
|
|
|
### Hardware DFU
|
|
|
|
- Press `OK` on boot to enter DFU with ST boot-loader
|
|
|
|
It won't work only in one case:
|
|
|
|
- Option Bytes are damaged or set to ignore the `OK` key
|
|
|
|
## DFU combos
|
|
|
|
### Hardware Reset + Software DFU
|
|
|
|
- Press `LEFT` and `BACK` and hold for a couple of seconds
|
|
- Release `BACK`
|
|
- Device will enter DFU with an indication (Blue LED + DFU Screen)
|
|
- Release `LEFT`
|
|
|
|
This combo performs a hardware reset by pulling the MCU reset line down. Then, the `LEFT` key indicates to the boot-loader that DFU mode is requested.
|
|
|
|
It won't work in two cases:
|
|
|
|
- The MCU debug block is active and holding the reset line from inside
|
|
- Flipper boot-loader is damaged or absent
|
|
|
|
### Hardware Reset + Hardware DFU
|
|
|
|
- Press `LEFT`, `BACK` and `OK` and hold for a couple of seconds
|
|
- Release `BACK` and `LEFT`
|
|
- The device will enter DFU without an indication
|
|
|
|
This combo performs a hardware reset by pulling the MCU reset line down. Then, the `OK` key forces MCU to load the internal boot-loader.
|
|
|
|
It won't work in two cases:
|
|
|
|
- The MCU debug block is active and holding the reset line from inside
|
|
- Option Bytes are damaged or set to ignore the `OK` key
|
|
|
|
### Hardware Power Reset + Software DFU
|
|
|
|
- Disconnect the USB and any external power supplies
|
|
- Press `BACK` and `LEFT` for 30 seconds
|
|
- Release `BACK`
|
|
- The device will enter DFU with an indication (Blue LED + DFU Screen)
|
|
- Release `LEFT`
|
|
- Plug in the USB
|
|
|
|
This combo performs a reset by switching the SYS power line off and then on. Next, the `LEFT` key indicates to the boot-loader that DFU mode is requested.
|
|
|
|
It won't work in two cases:
|
|
|
|
- Power supply is connected to USB or 5V_ext
|
|
- Flipper boot-loader is damaged or absent
|
|
|
|
### Hardware Power Reset + Hardware DFU
|
|
|
|
- Disconnect the USB and any external power supplies
|
|
- Press `BACK` and `OK` and hold for 30 seconds
|
|
- Release `BACK` and `OK`
|
|
- The device will enter DFU without indication
|
|
- Plug in the USB
|
|
|
|
This combo performs a reset by switching the SYS power line off and then on. Next, the `OK` key forces MCU to load the internal boot-loader.
|
|
|
|
It won't work in two cases:
|
|
|
|
- Power supply is connected to USB or 5V_ext
|
|
- Option Bytes are damaged or set to ignore the `OK` key
|
|
|
|
# Alternative ways to recover your device
|
|
|
|
If none of the described methods helped you:
|
|
|
|
- Make sure the battery charged
|
|
- Disconnect the battery and connect again (requires disassembly)
|
|
- Try to flash the device with ST-Link or another programmer that supports SWD
|
|
|
|
If you're still here and your device is not working: it's not a software issue.
|