There are plenty of variants of PicoZed boards. AVNET's docs say eMMC cannot be used as a primary boot device, only SPI or SD Card. Now if you used switches to select eMMC as the boot device I wonder what board in what hardware revision you're using that allows that.
Probably you need to amend the Device Tree manually to tell the eMMC driver where to look for a second storage device, however, I can't help you here as I don't know the board in person. Regards, Michał Fita On Sun, 6 Aug 2023 at 06:36, <[email protected]> wrote: > Hi all, > > I had been working on a project that uses Yoco to generate the Poky image > for Picozed. (project uses Warrior release - planning to upgrade to a later > release). Here is my use case: > 1. boot using the SD card - OK. > 2. access the eMMC and be able to read/write files on the eMMC - part that > I am working/struggling with right now. > > Currently, we only use the SD card and the eMMC isn't used because we > can't access it. To double check that the eMMC is working, I was able to > boot the Linux on eMMC (by changing the jumper switch) and I saw that the > eMMC works and it is using the PetaLinux that came with it. > > I was able to generate and boot from the SD card. However, I am unable to > see the eMMC. > > I tried modifying the contents of > meta-xilinx\meta-xilinx-bsp\recipes-bsp\device-tree\files\picozed-zynq7.dts > and I am seeing some behavior (sometimes it gets stucked saying "waiting > for root"...) which I assume this is the file that needs to be modified. > However, I had been doing trial and error on this file and can't figure out > how to see the eMMC. Is there anything else that I need to do to be able to > have access to the eMMC (like other files that needs to be modified, or any > other Yocto/Bitbake configurations that needs to be done)? > > Thanks! > > >
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