Zephyr on Rasberry Pi 4 Model B no output

[kangjiamu]

Describe the bug
I followed your instruction https://docs.zephyrproject.org/latest/boards/arm64/rpi_4b/doc/index.html to use Zephyr on Rasberry Pi 4 Model B, but I didn't see any output on the serial console (GPIO 14/15).

To Reproduce

1. I prepared a TF card with MBR and FAT32 and download bcm2711-rpi-4-b.dtb bootcode.bin start4.elf
2. I copied zephyrproject/zephyr/build/zephyr/zephyr.bin to the root of my TF card and create config.txt following the instructions
3. I connect the USB to TTL adapter (My USB TTL adapter has passed the loopback test)
4. I used Putty(Windows), screen and minnicom(Mac) to do serial connection but all of them do not have any output

Expected behavior
I should see the following output on the serial console (GPIO 14/15):

*** Booting Zephyr OS build XXXXXXXXXXXX  ***
Hello World! Raspberry Pi 4 Model B!

Impact
I need to use rtest on Zephyr on Rasberry Pi 4B, but the Zephyr didn't have any output, so I couldn't finish my task .

Logs and console output
no output.
Environment (please complete the following information):

• Mac OS(M2)
• Windows11

Additional context
The baud rate and serial settings (usually 115200 8N1) configured for Zephyr OS on the Raspberry Pi.

[github-actions[bot]]

Hi @kangjiamu! We appreciate you submitting your first issue for our open-source project. 🌟

Even though I'm a bot, I can assure you that the whole community is genuinely grateful for your time and effort. 🤖💙

[nordicjm]

@lenghonglin

[lenghonglin]

How do you modify config.txt

[kangjiamu]

How do you modify config.txt
kernel=zephyr.bin
arm_64bit=1
enable_uart=1
uart_2ndstage=1

[lenghonglin]

How do you modify config.txt
kernel=zephyr.bin
arm_64bit=1
enable_uart=1
uart_2ndstage=1

Can you take a screenshot of the root directory? And , Does the terminal have any output of bootcode logs?

[kangjiamu]

How do you modify config.txt
kernel=zephyr.bin
arm_64bit=1
enable_uart=1
uart_2ndstage=1

Can you take a screenshot of the root directory? And , Does the terminal have any output of bootcode logs?

[lenghonglin]

How do you modify config.txt
kernel=zephyr.bin
arm_64bit=1
enable_uart=1
uart_2ndstage=1

Can you take a screenshot of the root directory? And , Does the terminal have any output of bootcode logs?

Is there output such log?

If not, it means the boot disk was not created correctly. You can use Raspberry Pi Imager to create a properly functioning boot disk.

[kangjiamu]

I can't see any output in serial console.

[kangjiamu]

I formatted my TF card to MBR and FAT32 again, download the 3 files from your official website, created config.txt and copied zephyr.bin, all these files to the root of my TF card. There is still no output when trying to interact with Raspberry pi.

[lenghonglin]

I formatted my TF card to MBR and FAT32 again, download the 3 files from your official website, created config.txt and copied zephyr.bin, all these files to the root of my TF card. There is still no output when trying to interact with Raspberry pi.

There is a simple way that u can try.

1. Use Raspberry Pi Imager to write an image, ensuring it can boot properly and display the logs.
2. modify config.txt

kernel=zephyr.bin
arm_64bit=1
enable_uart=1
uart_2ndstage=1

[kangjiamu]

Still can not work ...

[lenghonglin]

Still can not work ...

Could you please provide more details on how you operated it?

[Spice-Weasel]

Still can not work ...

I'm going to try this also. I'll let you know how it goes.

[Hasti-Gondaliya]

Hi,

I'm facing the same issue. Is there any update on this?

[TaiJuWu]

I used raspberry imager to format SD card and followed the steps from doc.
It can work.

[Nithyasrikannathal]

Describe the bug I followed your instruction https://docs.zephyrproject.org/latest/boards/arm64/rpi_4b/doc/index.html to use Zephyr on Rasberry Pi 4 Model B, but I didn't see any output on the serial console (GPIO 14/15).

To Reproduce

1. I prepared a TF card with MBR and FAT32 and download bcm2711-rpi-4-b.dtb bootcode.bin start4.elf
2. I copied zephyrproject/zephyr/build/zephyr/zephyr.bin to the root of my TF card and create config.txt following the instructions
3. I connect the USB to TTL adapter (My USB TTL adapter has passed the loopback test)
4. I used Putty(Windows), screen and minnicom(Mac) to do serial connection but all of them do not have any output

Expected behavior I should see the following output on the serial console (GPIO 14/15):

*** Booting Zephyr OS build XXXXXXXXXXXX  ***
Hello World! Raspberry Pi 4 Model B!

Impact I need to use rtest on Zephyr on Rasberry Pi 4B, but the Zephyr didn't have any output, so I couldn't finish my task .

Logs and console output no output. Environment (please complete the following information):

• Mac OS(M2)
• Windows11

Additional context The baud rate and serial settings (usually 115200 8N1) configured for Zephyr OS on the Raspberry Pi.

Actually, Even I am facing the same issue. I am not getting any output in serial console after following the steps too. I also want to add that my zephyr.bin file is just 101Kb. Like it is the OS that we are trying to flash. Can this be in a small size? Am i missing out something? Before that i formatted my disk using raspberry pi imager for preparing TF card with MBR. Then i copied my zephyr.bin file from hello world build directory. Can someone help me regarding that. If possible, can anyone show your TF card file and its sizes for reference?

[thkinus]

Is there any update on this issue? I am also facing same problem.

[lenghonglin]

Could you please provide more details

[thkinus]

1. Format the SD Card using Raspberry Pi Imager as FAT32
2. Copy the following 5 files to root directory on SD Card

• bcm2711-rpi-4-b.dtb
• bootcode.bin
• start4.elf
• config.txt
• zephyrproject/zephyr/samples/hello_world/build/zephyr/zephyr.bin

3. Connect Raspberry Pi 4B to laptop using the USB to TTL adapter
4. Run Putty(Windows) to check serial outputs

But no output on Putty

[lenghonglin]

OK，I will test this weekend THK ***@***.***> 于2024年7月9日周二 22:08写道：

…

1. Format the SD Card using Raspberry Pi Imager as FAT32 2. Copy the following 5 files to root directory on SD Card - bcm2711-rpi-4-b.dtb - bootcode.bin - start4.elf - config.txt - zephyrproject/zephyr/samples/hello_world/build/zephyr/zephyr.bin 3. Connect Raspberry Pi 4B to laptop using the USB to TTL adapter 4. Run Putty(Windows) to check serial outputs But no output on Putty — Reply to this email directly, view it on GitHub <#65262 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ABDYHUT2BOQMCQIBMPWBNH3ZLPVGHAVCNFSM6AAAAABCT7H6CCVHI2DSMVQWIX3LMV43SRDJONRXK43TNFXW4Q3PNVWWK3TUHM4TSOJZGA4TK> . You are receiving this because you were mentioned.Message ID: ***@***.*** com>