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Co-authored-by: konerini <25254561+konerini@users.noreply.github.com> Co-authored-by: あく <alleteam@gmail.com>
120 lines
3.8 KiB
Markdown
120 lines
3.8 KiB
Markdown
# Key Combos
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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.
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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 the MCU reset line down.
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Main components involved: Keys -> DD8(NC7SZ32M5X, OR-gate) -> DD1(STM32WB55, MCU).
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It won't work only in one case:
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- The MCU debug block is active and holding the reset line from inside.
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### Hardware Power Reset
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- Disconnect the USB cable and any external power supplies
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- Disconnect the USB once again
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- Make sure you've disconnected the USB and any external power supplies
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- Press `BACK` and hold for 30 seconds (this will only work with the USB disconnected)
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- If you haven't disconnected the USB, then disconnect it and repeat the previous step
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- Release the `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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It won't work only in one case:
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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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It won't work only in one case:
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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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It won't work only in one case:
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- Option Bytes are damaged or set to ignore the `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 an indication (Blue LED + DFU Screen)
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- Release `LEFT`
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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.
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It won't work in two cases:
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- The MCU debug block is active and holding the 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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- The device will enter DFU without an indication
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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.
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It won't work in two cases:
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- The MCU debug block is active and holding the reset line from inside
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- Option Bytes are damaged or set to ignore the `OK` key
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### Hardware Power Reset + Software DFU
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- Disconnect the 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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- The device will enter DFU with an indication (Blue LED + DFU Screen)
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- Release `LEFT`
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- Plug in the USB
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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.
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It won't work in two cases:
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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 the 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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- The device will enter DFU without indication
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- Plug in the USB
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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.
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It won't work in two cases:
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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 the `OK` key
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# Alternative ways to recover your device
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If none of the described methods helped you:
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- Make sure the battery charged
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- Disconnect the battery and connect again (requires disassembly)
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- Try to flash the device with ST-Link or another programmer that supports SWD
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If you're still here and your device is not working: it's not a software issue.
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