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docs: Explicitly mention to use a USB cable

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Replace the vague step about grounding with one that says to connect a
USB cable and explain its purpose.
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Tim Crawford 2021-02-17 18:43:26 -07:00 committed by Jeremy Soller
parent 18ec0eb694
commit 791b3224f9
1 changed files with 13 additions and 6 deletions
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19
doc/flashing.md
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@ -15,18 +15,25 @@ make BOARD=<vendor>/<model> flash_internal
Use this method for first-time flashing or flashing a bricked controller.
[A Mega 2560 is required for flashing.](./mega2560.md)
This requires:
- [A configured Mega 2560](./mega2560.md): For programming the EC itself
- A USB cable: For creating a common ground and providing power
- USB-C is recommended, but USB-A will work as well
- A second computer: For building and flashing the firmware
**The system must not have any power!**
1. Turn off the computer
1. Turn off the laptop
2. Unplug the AC adapter
3. Remove the bottom panel
4. Disconnect the battery
5. Ground the laptop to the programmer
6. Disconnect the keyboard from its port
7. Attach the programmer to the keyboard port
8. Flash the firmware
5. Disconnect the keyboard from its port
6. Replace the bottom panel and flip the laptop back over
7. Connect the USB cable from the laptop to the host machine
8. Connect the Mega 2560 to the host machine
9. Attach the programmer to the keyboard port
10. Flash the firmware
```
make BOARD=<vendor>/<model> flash_external