After building output by buildroot , I found 4 files in image dir : u-boot.bin uimage rootfs.tar.gz and rootfs.tar. i flushed With sdfuse nanopi master , of course i delete zimage from prebuilt dir. At finish I test board with HDMI connect but screen show only color bars and blue LED on board is light continuously. What is problem? in build root making? or in SD Flushing ?
I would suggest using PSU-ONECOM or some other UART adapter and minicom to view your boot messages.
I can't use any other part.
Looking at your boot messages is a common task. It is a very necessary skill. You could look at syslog on your SD card using another computer, something might get logged there during the boot process.
No result. how i can convert 3 files to one img file?
how i can look boot messages or syslog?
> I would suggest using PSU-ONECOM or some other UART adapter and > minicom to view your boot messages. > You could look at syslog on your SD card using another computer, > something might get logged there during the boot process.