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Changing Flash parameters in overlay file

CktDesigner

My project is using nRF52840.   Early software development used an nRF52840-DK to develop most of the software.   Software is based on Zephyr using nRF Connect version 1.6.1.     I'm using the "littlefs" file system.   I got most things working using the nRF52840-DK.     I now have my custom board and it uses a slightly different (and larger) qspi-nor flash device.   

I'm still using the nRF52840-DK board file, but "modify" some of the parameters using an overlay file.    I know I need to change some of the parameters w.r.t. the flash.    I was able to modify the jedec-id for the new device, but am looking for some documentation that defines the parameters (keywords) in the board definition file (what some of them mean and format of values)   

Can you point me to these definitions (so I don't have to read through a lot of code :-))?

Thanks!

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    Hi again

    Yes, you seem to be right indeed. 

    I have looked at the Macronix and Cypress write procedures, and they seem very similar, so I've not been able to track down what exact changes are necessary to be done yet, but I have a few suggestions, and I'm also awaiting a reply from our FS/QSPI experts (I hoped they got back to me by today, but they have not). I will update you as soon as I hear from them.

    You can try setting the size in your overlay file to match the size of your Cypress chip. Since you're able to read the JEDEC ID correctly for instance, the flash chip seems to be set up correctly, but the file system procedure is what's not working as intended.

    Best regards,

    Simon

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  • 0

    Hi again

    Yes, you seem to be right indeed. 

    I have looked at the Macronix and Cypress write procedures, and they seem very similar, so I've not been able to track down what exact changes are necessary to be done yet, but I have a few suggestions, and I'm also awaiting a reply from our FS/QSPI experts (I hoped they got back to me by today, but they have not). I will update you as soon as I hear from them.

    You can try setting the size in your overlay file to match the size of your Cypress chip. Since you're able to read the JEDEC ID correctly for instance, the flash chip seems to be set up correctly, but the file system procedure is what's not working as intended.

    Best regards,

    Simon

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