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docs: Only 5570 and 8587 are valid EC IDs

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ecflash has no verification for the EC it detects. It will attempt to
read and erase whatever it finds, where it will hang. Document what it
*should* read and an example of what it *shouldn't* read.

Signed-off-by: Tim Crawford <tcrawford@system76.com>
This commit is contained in:
Tim Crawford
2021-08-02 15:30:40 -06:00
committed by Jeremy Soller
parent 73c6bd986d
commit e00686a661
1 changed files with 15 additions and 0 deletions
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doc/flashing.md
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@ -43,3 +43,18 @@ This requires:
``` ```
make BOARD=<vendor>/<model> flash_external make BOARD=<vendor>/<model> flash_external
``` ```
One of the first things it does is read the EC ID and version. If working, the
ID will be the EC model the machine uses.
```
ID: 5570 VER: 2
ID: 8587 VER: 6
```
Any other values means that the Mega 2560 is misconfigured or the FPC is not
seated correctly. E.g., this is wrong:
```
ID: FF7F VER: 127
```