Questions tagged [pi4-eeprom]

This tag is for questions related to the EEPROM on the Pi 4. For questions about the EEPROM used with hats, use the 'hat' tag. For questions about using other external EEPROMs with the Pi, use the 'eeprom' tag.

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283 views

can i be sure the eeprom configuration is the latest version?

i just came across pi dramble cluster https://www.google.com/search?q=pi+dramble+cluster&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjBzISZg7jyAhVi8HMBHZx6CUsQ_AUoAXoECAEQAw&biw=1848&...
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72 views

Disable boot-time messages

I'm on Rpi-4 and the OS is DietPi. I have modified /boot/cmdline.txt using the following parameters to disable all and every boot-time logs: console=tty3 root=PARTUUID=907af7d0-02 rootfstype=ext4 ...
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2answers
78 views

When there are multiple boot devices, they are not booted in the order defined in BOOT_ORDER?

I have a pi4. Today, I want to set up USB booting. After I executed the following procedure, I found that the USB booting was successful, but when I plug both the SD boot device and the USB boot ...
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2answers
385 views

Where is EEPROM in Pi4?

I want to know the location of Pi4's EEPROM. Is it in BCM 2711? or in memory chip? or as an individual module in board? I looked for many reference books(BCM2711 ARM Peripherals、Raspberry Pi Compute ...
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259 views

New Raspberry Pi 400 don't boot: flashes green power light one time, then off

After connecting power to rpi I get fast power led enable, then it's off. I tried reflashing EEPROM, enabling without all, pressing F10, trying 2 wires and PSU. I tried 2 SD cards, flashed using ...
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2k views

Directly install Raspberry Pi OS 64-bit on SSD: what are prerequisites

To install a 64-bit Raspberry OS on a Pi 4 board can be achieved by download the zip file from here unzip and write content to empty SSD as you would for an SD card, gives two partions (a FAT boot ...
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1answer
400 views

RPI4 missing 'pieeprom.bin' file?

I'm trying to edit the bootloader config following the rpi official instructions (https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2711_bootloader_config.md). However, when I try rpi-...
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1answer
836 views

PI4 - no boot from usb3 samsung t5

The steps I have done is: Update/upgrade to the latest Raspberry Pi OS (sudo apt update && sudo apt upgrade-full) Update the eeprom firmware (rpi-eeprom-update) Clone the SD card using /...
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0answers
277 views

Raspberry pi 4 stuck on rainbow screen, green LED flashes 4 times

I have install latest(2020-05-27) raspberry pi image 32-bit. And it gets on rainbow screen on both outputs, red lights is on, while green lights flashes 4 times. When I turn on raspberry pi with out ...
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1answer
315 views

Using of GPIO0 and GPIO1 on Raspberry Pi 4B

I have built customize image using yocto for Rpi 4B. I want to use GPIO0 and GPIO1 as input/output with /sys/class interface Can I use them? I don't need any Rpi HAT or EEPROM. I have googled so ...
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0answers
939 views

Raspberry Pi 4 EEPROM (and USB firmware) configurations

A while ago, the Pi Foundation mentioned that there was an update for the USB driver (yes, apparently more components on the board have firmware above and beyond drivers loaded by the OS) to reduce ...
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1answer
331 views

Is debug logging (to file or UART) available for firmware (start4.elf) portion of boot? [Pi4]

Is there any place that debugging messages get logged during the start4.elf portion of the boot process? BEFORE start4.elf runs, when the EEPROM is running, it's possible to configure UART output. ...
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1answer
704 views

Raspberry Pi 4 Wifi disconnected after change screen resolution

I'm having some problems with Raspberry Pi 4... The wifi works normally when I use 1920 x 1080. But when I change the resolution from 1920 x 1080 to 1280 x 720, the wifi suddenly disconnected and ...
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1answer
986 views

How to revert misconfigured BOOT_ORDER value on RPI4?

I've had my RPI4 configured to boot from the network if there is no SD card inserted (for bare metal programming) but firmware update restored it back to SD boot only. So I've tried to make it boot ...
3
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1answer
2k views

Write to spi EEPROM in Raspberry Pi 4

The Pi4 has 512Kb of EEPROM which hold the bootloader. Does anyone know if it is possible to write to spi memory to be used in programs in the user space without corrupting the bootloader? Is there ...