johannv7 Posted January 17, 2019 Share Posted January 17, 2019 I will describe my problem with NanoPi Neo Core2: I installed the system on eMMc I installed WiringNP I installed the USB drive Everything worked, also Putty via USB I wanted to connect the external module via SPI. The module requires setting the transfer frequency to 20 MHz. I decided to look at the file sun50i-h5-nanopi-neo-core2.dtb . For this purpose, I decompiled to a file . dts . Due to late night time I made a cardinal error, that is before these activities I did not copy the file . dtb I just played on the operating system. After the power is turned off NanoPi and the next day the system is not raised. Red power LED is lit green while not depicted close. Router does not see NanoPi and was obviously seen. Replacing the power supply did not help. I recorded the system card ( DietPi , Armbian , FriendlyElec ) . After inserting into NanoPi the system also did not start. I tried different combinations: start with ethernet and without, with putty (serial), with different SD cards and nothing. I read on the forum that NanoPi with the H3 processor always tests the presence of an SD card in the first place and if it is in the bootable version it starts the system from it. Probably NanoPi Neo Core2 with H5 processor this rule does not apply. Please help me solve the problem of SETTING UP BOOT FROM SD CARD ! Link to comment Share on other sites More sharing options...
martinayotte Posted January 17, 2019 Share Posted January 17, 2019 10 hours ago, johannv7 said: I read on the forum that NanoPi with the H3 processor always tests the presence of an SD card in the first place and if it is in the bootable version it starts the system from it. Probably NanoPi Neo Core2 with H5 processor this rule does not apply. First, I don't see any relation about changing SPI transfer rate would affect SDCard ... Second, the boot sequence for any Allwinner SoC is SDCard first, eMMC second and SPIFlash third. So why are you not able to boot from SD ? I don't see any reason ... Link to comment Share on other sites More sharing options...
johannv7 Posted January 18, 2019 Author Share Posted January 18, 2019 Exceptional power yesterday when switched on, it pulsed with a frequency of 1 hz . Only for two starts. Then the led came back to the previous state, it is shining constantly. Link to comment Share on other sites More sharing options...
sfx2000 Posted January 18, 2019 Share Posted January 18, 2019 On 1/16/2019 at 10:49 PM, johannv7 said: I will describe my problem with NanoPi Neo Core2: Nice boards, but they are power/temp sensitive... H5 can spike up a bit, and under load... Have a good/known good PSW and a thermal solution... Link to comment Share on other sites More sharing options...
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