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Documentation: Add note about testing UART on the Raspberry Pi 4B
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sideshowbarker
2024-07-17 06:45:52 +09:00
Author: https://github.com/caoimhebyrne Commit: https://github.com/SerenityOS/serenity/commit/b0eff23a46 Pull-request: https://github.com/SerenityOS/serenity/pull/19058 Reviewed-by: https://github.com/BertalanD ✅ Reviewed-by: https://github.com/nico ✅ Reviewed-by: https://github.com/supercomputer7 ✅
@ -48,6 +48,13 @@ This step is needed because the original firmware files need to be present on th
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Please follow one of the existing guides (for example [here](https://scribles.net/setting-up-serial-communication-between-raspberry-pi-and-pc)) and make sure UART is working on Raspberry Pi OS before proceeding.
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If you're using a Raspberry Pi 4B and want to test if the UART is working correctly, you need to do a few extra steps.
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UART0 (the one that SerenityOS uses) is used for bluetooth on these models, so for the OS to use it instead, ensure that you disable Bluetooth inside the `config.txt`:
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```
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dtoverlay=disable-bt
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```
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### Step 2: Mount SD Card
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If you use a Raspberry Pi 4, and your serenity kernel is called `kernel8.img`
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@ -70,7 +77,7 @@ enable_uart=1
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### Step 3: Copy Serenity kernel to SD Card
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`kernel8.img` can be found in `Build/aarch64/Kernel/Prekernel/`. Copy it to the main directory on the `Boot/` partition, next to `config.txt`. You can either replace the original file or use another name (see above).
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`kernel8.img` can be found in `Build/aarch64/Kernel/`. Copy it to the main directory on the `Boot/` partition, next to `config.txt`. You can either replace the original file or use another name (see above).
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### Step 4: Put the SD Card in the Raspberry Pi and power on
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@ -84,7 +91,7 @@ There are multiple ways to set up your network. The easiest way is a direct conn
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Here's the [Raspberry Pi Documentation](https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#debugging-network-boot-mode) on booting from the network.
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### Step 1: Make sure OTP mode is enabled on the board
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### Step 1: Make sure OTP mode is enabled on the board
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This is enabled by default on Raspberry Pi 3+. For the previous boards please see the section [Debugging Network Boot Mode](https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#debugging-network-boot-mode) of the Raspberry Pi documentation.
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