134 lines
3.7 KiB
Markdown
134 lines
3.7 KiB
Markdown
# Key Combos
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There are times when your Flipper feels blue and doesn't respond to your commands.
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In that case, you may find this guide useful.
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## Basic Combos
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### Hardware Reset
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- Press `LEFT` and `BACK` and hold for a couple of seconds
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- Release `LEFT` and `BACK`
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This combo performs a hardware reset by pulling MCU reset line down.
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Main components involved: Keys -> DD8(NC7SZ32M5X, OR-gate) -> DD1(STM32WB55, MCU)
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There is 1 case where it does not work:
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- MCU debug block is active and holding reset line from inside.
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### Hardware Power Reset
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- Disconnect USB and any external power supplies
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- Disconnect USB once again
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- Make sure that you've disconnected USB and any external power supplies
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- Press `BACK` and hold for 30 seconds (Will only work with USB disconnected)
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- If you have not disconnected USB, then disconnect USB and repeat previous step
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- Release `BACK` key
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This combo performs a reset by switching SYS power line off and then on.
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Main components involved: Keys -> DD6(bq25896, charger)
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There is 1 case where it does not work:
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- Power supply is connected to USB or 5V_ext
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### Software DFU
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- Press `LEFT` on boot to enter DFU with Flipper boot-loader
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There is 1 case where it does not work:
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- Flipper boot-loader is damaged or absent
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### Hardware DFU
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- Press `OK` on boot to enter DFU with ST boot-loader
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There is 1 case where it does not work:
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- Option Bytes are damaged or set to ignore `OK` key
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## DFU Combos
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### Hardware Reset + Software DFU
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- Press `LEFT` and `BACK` and hold for a couple of seconds
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- Release `BACK`
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- Device will enter DFU with indication (Blue LED + DFU Screen)
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- Release `LEFT`
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This combo performs a hardware reset by pulling MCU reset line down.
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Then, `LEFT` key indicates to the boot-loader that DFU mode is requested.
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There are 2 cases where it does not work:
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- MCU debug block is active and holding reset line from inside
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- Flipper boot-loader is damaged or absent
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### Hardware Reset + Hardware DFU
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- Press `LEFT`, `BACK` and `OK` and hold for a couple of seconds
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- Release `BACK` and `LEFT`
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- Device will enter DFU without indication
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This combo performs a hardware reset by pulling MCU reset line down.
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Then, `OK` key forces MCU to load internal boot-loader.
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There are 2 cases where it does not work:
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- MCU debug block is active and holding reset line from inside
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- Option Bytes are damaged or set to ignore `OK` key
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### Hardware Power Reset + Software DFU
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- Disconnect USB and any external power supplies
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- Press `BACK` and `LEFT` for 30 seconds
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- Release `BACK`
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- Device will enter DFU with indication (Blue LED + DFU Screen)
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- Release `LEFT`
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- Plug in USB
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This combo performs a reset by switching SYS power line off and then on.
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Then, `LEFT` key indicates to boot-loader that DFU mode requested.
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There are 2 cases where it does not work:
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- Power supply is connected to USB or 5V_ext
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- Flipper boot-loader is damaged or absent
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### Hardware Power Reset + Hardware DFU
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- Disconnect USB and any external power supplies
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- Press `BACK` and `OK` and hold for 30 seconds
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- Release `BACK` and `OK`
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- Device will enter DFU without indication
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- Plug USB
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This combo performs a reset by switching SYS power line off and then on.
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Then, `OK` key forces MCU to load internal boot-loader.
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There are 2 cases where it does not work:
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- Power supply is connected to USB or 5V_ext
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- Option Bytes are damaged or set to ignore `OK` key
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# Alternative ways to recover your device
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If none of the described methods were useful:
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- Ensure the battery charged
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- Disconnect the battery and connect again (Requires disassembly)
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- Try to Flash device with ST-Link or other programmer that supports SWD
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If you still are here and your device is not working: it's not a software issue. |