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x230: README: minor additions and fixes

pull/35/head
Martin Kepplinger 6 years ago
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b1812a3261
1 changed files with 20 additions and 12 deletions
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      x230/README.md

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x230/README.md View File

@ -28,8 +28,7 @@ Raspberry Pi with a SPI 8-pin chip clip connected), run
`flashrom_rpi_bottom_unlock.sh` on the lower chip
and `flashrom_rpi_top_write.sh` on the top chip of the two.
For updating later, run `prepare_internal_flashing.sh` to get
files and instructions about updating. No need to disassemble.
For updating later, run `prepare_internal_flashing.sh`. No need to disassemble.
And always use the latest [released](https://github.com/merge/coreboot-x230/releases)
package. This will be tested. The git master
@ -72,7 +71,8 @@ that allows us to use any 3rd party aftermarket battery:
That's it. You can create a bootable USB stick: `sudo dd if=patched.x230.img of=/dev/sdx`
and boot from it. Alternatively, burn `patched.x230.iso` to a CD.
and boot from it. Alternatively, burn `patched.x230.iso` to a CD. And make sure
you have "legacy" boot set, not "UEFI" boot.
### flashrom chip config
We (or our scripts) use [flashrom](https://flashrom.org/) for flashing. Run
@ -152,7 +152,8 @@ That's it. Keep the backup safe.
## How to flash
When __upgrading__ to a new release, only the "upper" 4MB chip has to be written
and any of the following examples are possible. Otherwise you cannot use
"internal" flashing and please read [flashing for the first time](#flashing-for-the-first-time).
"internal" flashing and please read
[flashing for the first time](#flashing-for-the-first-time).
### Example: internal
* Only for _updating_! You have to have your 8MB chip flashed externally using
@ -167,7 +168,9 @@ this is very dangerous!
### Example: Raspberry Pi 3
Here you'll flash externally, using a "Pomona 5250 8-pin SOIC test clip". You'll find
one easily. This is how the X230's SPI connection looks on both chips:
one easily. Remove the 7 screws to remove the keyboard (by pushing it towards the
screen before lifting) and the palmrest. You'll find the chips using the photo
below. This is how the SPI connection looks on both chips:
Screen (furthest from you)
@ -182,11 +185,16 @@ one easily. This is how the X230's SPI connection looks on both chips:
We run [Raspbian](https://www.raspberrypi.org/downloads/raspbian/)
and have the following setup
* [Serial connection](https://elinux.org/RPi_Serial_Connection) using a "USB to Serial" UART Adapter and picocom or minicom (yes, in this case you need a second PC connected to the RPi over UART)
* [Serial connection](https://elinux.org/RPi_Serial_Connection) using a
"USB to Serial" UART Adapter and picocom or minicom (yes, in this case you
need a second PC connected to the RPi over UART)
* in the SD Cards's `/boot/config.txt` file `enable_uart=1` and `dtparam=spi=on`
* [For flashrom](https://www.flashrom.org/RaspberryPi) we put `spi_bcm2835` and `spidev` in /etc/modules
* [Connect to a wifi](https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md) or to network over ethernet to `sudo apt-get install flashrom`
* connect the Clip to the Raspberry Pi 3 (there are [prettier images](https://github.com/splitbrain/rpibplusleaf) too:
* [For flashrom](https://www.flashrom.org/RaspberryPi) we put `spi_bcm2835`
and `spidev` in /etc/modules
* [Connect to a wifi](https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md)
or ethernet to `sudo apt-get install flashrom`
* connect the Clip to the Raspberry Pi 3 (there are
[prettier images](https://github.com/splitbrain/rpibplusleaf) too:
Edge of pi (furthest from you)
@ -223,9 +231,7 @@ Stick or scp instead. :) (but you need even more hardware or a network).
host$ sha1sum <tarball>
rpi$ sha1sum <tarball>
![Raspberry Pi at work](rpi_clip.jpg)
Now unpack it:
Unpack it:
mkdir tarball_extracted
@ -233,6 +239,8 @@ Now unpack it:
cd tarball_extracted
![Raspberry Pi at work](rpi_clip.jpg)
Connect the SPI clip to the "top" chip, and run:


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