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update manual install instructions for how to increase spidev buffer in cmdline.txt

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Nick Klockenga
2023-08-02 23:05:57 -04:00
parent 0cd93fd99c
commit 32eda52bb4
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docs/manual_installation.md
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@@ -215,6 +215,13 @@ workon seedsigner-env
pwd pwd
``` ```
### Optional: increase spidev buffer size
This allows `ST7789.py` to update the LCD without performing multiple write operations because the default buffer size is 4096 bytes. The default can be changed via the `/boot/cmdline.txt` file. You will need to add `spidev.bufsiz=131072` to the end of this single lined file command.
Example `cmdline.txt` contents:
```
console=serial0,115200 console=tty1 root=PARTUUID=2fa4ba7e-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait modules-load=dwc2,g_ether spidev.bufsiz=131072
```
### Configure `systemd` to run SeedSigner at boot: ### Configure `systemd` to run SeedSigner at boot: