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Add note about fanshim causing problems with uart during early boot that can prevent the system from starting ; tweak docs WRT armor case and fan shim, recommend fan shim over armor case as it's a more flexible solution

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KemoNine 2020-08-11 16:22:54 -04:00
parent 974ee0d62d
commit dad7abe725
2 changed files with 10 additions and 1 deletions
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8
docs/pimoroni_fan_shim.md
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@ -9,7 +9,15 @@ sudo -sHu root
# Move boot serial -> UART5 to avoid colission between UART1 and fanshim
nano -w /boot/firmware/usercfg.txt
# Add following to top of file
# Enable uart5 on pins for ttyAMA1
# Pin 32 : TX (connect to RX on adapter)
# Pin 33 : RX (connect to TX on adapter)
dtoverlay=uart5
# Turn off uart ; fanshim will break boot if this is enabled
# Further reading: https://bugs.launchpad.net/ubuntu/+source/u-boot/+bug/1873520
enable_uart=0
nano -w /boot/firmware/cmdline.txt
# switch console=serial0,115200 to console=ttyAMA1,115200

3
hardware.md
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@ -10,8 +10,9 @@ This is a surprisingly straight forward project that has minimal in the way of h
* [Geekworm Armor Case](https://geekworm.com/products/raspberry-pi-4-model-b-armor-aluminum-alloy-case-protective-shell)
* If you would like an always on fan, select the model with the integrated fan option
* [Pimoroni Fan SHIM](https://shop.pimoroni.com/products/fan-shim)
* This has better cooling as well as on/off support than the Geekworm Armor Case with cooling
* This has better cooling as well as on/off support
* You probably want this instead of the Geekworm armor case with fans
* This will **NOT** require soldering to use but assumes you have room to slip the fan all the way down on the main header
* USB to Serial adapter
* There are a lot of options, choose one you know that will work well
* Mini HDMI to HDMI adapter