今天买了8G版本的pi4

直接用了sd卡进行更新升级

结果EEPROM死活更新不了，就卡着了

所以就直接用sd卡更新

首先把sd卡格式化为FAT或者FAT32

然后

https://github.com/raspberrypi/rpi-eeprom/blob/master/releases.md

下载

解压把所有文件拷进sd卡

插上机器然后接电，见到绿灯不停闪，就可以把sd好下来，断电，换成已经做好镜像的sd卡再通电了。

救活

下面是英语版本。

Recovery Procedure

Extract the files from the rpi-boot-eeprom-recovery zip file into a temporary folder. These files will be recovery.bin, pieeprom.bin and README.txt.

Now put those 3 files directly on the root of your blank FAT32 formatted SD card. Your recovery card is now prepped and ready!

Before powering up your device make sure that all USB devices are removed. Even keyboards have been known to cause issues so make sure absolutely everything is unplugged!

Now insert the SD card into the Pi and connect the power.

If the bootloader recovery is successful the green activity light will start blinking rapidly continuously (forever). In this case you have successfully recovered your bootloader! You may now insert a normal fully imaged SD card and it will boot normally again.

If anything other than a continuous rapidly blinking green light happens the recovery was not successful.

If Recovery Doesn’t Work

• There is a known (and strange) issue with Raspberry Pi 4’s and 32 GB SD cards where the Pi will abort the boot. If this might apply to you then read this post.
• Make sure you created your SD card correctly. A common pitfall is using cards above 32 GB and formatting them with ex-FAT instead of regular FAT/FAT32.
• Make sure *all* USB devices are unplugged from the Pi
• Try a different SD card if you have one available. SD cards do go bad all the time. If there’s any doubt here check out my Raspberry Pi storage benchmarks page to see the highest performing SD cards (you definitely want an A1 rated one).
• Check your power cord. Make sure you are using a high quality USB-C power cord that is compatible with the Pi. Even if it was working before I have had several old Pi power supplies that worked for years die on me. If there’s any doubt grab a known reliable one like the Canakit USB-C Raspberry Pi 4 Power Supply

If you’ve gone through all the steps and are positive it’s not one of the above “gotcha” issues then it’s time to go deeper. You need to observe your Pi’s exact behavior when you plug it in (what the lights are doing). Here is a table of different blink patterns and what they mean:

If your Pi’s LED behavior matches any of these codes then we now have much more to go on to diagnose why your Pi won’t boot. Some of them are very obvious but they’re all worth a quick web search once you have matched it to a code.

If your Pi’s behavior does not match one of these codes head to the official sticky post on the Raspberry Pi forums and scroll to the very bottom (post #4 specifically for Raspberry Pi). This tracks ongoing boot issues with the Pi 4 that may affect your Pi and a whole bunch of things to try. If you get through that post go all the way up to post #1 and start going down the list.

REF https://jamesachambers.com/raspberry-pi-4-bootloader-firmware-updating-recovery-guide/