eMMC compatibility for "ROCK 3a" and "Rock pi 4"

[Suveju]

I had no problems at all with them on any board. What makes it hard for You?

eMMC compatibility for "ROCK 3a" and "Rock pi 4"

Is Rock 3a compatible with eMMC module v1.2? I have 3 such modules and each gives an error: => mmc dev 2 MMC error: The cmd index is 0, ret is -110 mmc_init: -110, time 33 Sorry to bring up this topic. I am a beginner with radxa boards. UPD: Yes, they are compatible. I managed to make it work, but it’s more like a randomly cast magic spell.

[dominik]

eMMC don’t require anything in SPI and it should just boot with correctly burned image,
I guess that it was just not flashed correctly.

[jagmic]

Hello everybody. Few days ago i bought “USB3 eMMC Reader” with GL3227E and after use this with emmc module I’m dissapointed. It is true - reader can read and write faster , but when I put it to usb slot I have to wait too longer … Dmesg gives me many I/O errors, GL chip is very, very hot and when I try to start my OS ( debain, slackware or WIN7) the boot computer is freeze. I can’t boot any OS from this redaer - moreover when I use cheaper emmc <—>microSD adapter whit the same module everything is correct. The most irritation for me is impossibility to use only main pinout ( GND, VDD, CLK, CMD and DAT0 ) to read in 1 bit mode … Wasted time and money …

[dominik]

Most of such software can also verify burned image, have You done that?
There should be no difference with cheap/slow adapter and fast based on GL3227E, checksums will tell You truth.

[jagmic]

Yes I know it. But it is not the point - even whitout module dmesg command gives me lot of errors . maybe firmware should be upgraded … Maybe I had immproper emmc module - but why the device can’t read in one bit mode ? In database genesys logic there is information about that . Maybe this is a question for hardware engineers