how can i run it on Pi 3B+

[figozhang]

i am using PI 3B+, i have a USB-Uart cable, and i install the latest "Raspbian Buster Lite" image on SD card, and i can see the Linux boot message on Uart. The Raspbian os is : https://downloads.raspberrypi.org/raspbian_lite_latest, it is build 2020-02.

i put our lesson01 image into SD card, replace kernel8.imge, but i canot see any output on Uart. what is problem?

[boringangel]

Did you delete the other kernal*.img's, and change the config.txt?

[stefanJi]

Do you change config.txt as follow ?

kernel_old=1
disable_commandline_tags=1

[echowwww]

I had the same problem. I found that the output comes up very shortly after the device is powered on. So please try to open an emulator session, then power on the rasp pi.

[sjtugjy]

I meet the same problem. Is there any progress? @figozhang I will be appreciated for any help.

[obstriker]

I meet the same issue with Rpi 3B. I did all of the above but still having the issue

[Discenna]

I've been able to run lessons 1-6 (not exercises) on my Pi 3B+.

After a fresh install of the Raspberry Pi OS on a SD card, using the Raspberry Pi Imager;

I can run lesson01 with the following changes:

1. in config.txt (only the below)

disable_commandline_tags=1
arm_64bit=1

2. and due to the lack of 'kernel_old' I also made the changes mentioned in https://github.com/s-matyukevich/raspberry-pi-os/issues/180
3. replace kernel8.img (in the SD card) with kernel8.img compiled from the modified lesson01 (modified due to (2))

My reasoning for not using 'kernel_old' was mostly due to preference, however, when testing lesson01 with 'kernel_old' in addition to (1) (minus (2)), I was unable to successfully display 'Hello World', although I'm unable to make any assertions as to why this may be (be it either a local issue or otherwise).