• State Not Answered
  • Replies 24 replies
  • Subscribers 69 subscribers
  • Views 4785 views
  • Users 0 members are here
Attachments (0)
Nordic Case Info
  • Case ID: 287725
Options

nr52832 + nRF Connect 1.8.0 + External Flash

embeddedER

Hello Team,

We are interfacing nRF52832 with an external flash for data storage. Could you please point to the right document/link/code reference on how to interface external flash (on SPI) with nRF52832 on nRF Connect SDK 1.8.0?

Thanks!

Parents
  • 0

    Hi Hakon,

    Thanks for keeping a tab on this. 

    Few points to consider:

    1. I tried with slower speed 1M, and it didn't help. Our routing is not so long, Flash is right next to the BLE module.
    2. I checked the datasheet of Flash and I believe the parameters in overlay are correct. Also, it works always when I reset the board using the reset button on the board.
    3. The issue is I see this error, whenever I program it using JTAG and JTAG resets the board, it doesn't detect the SPI. Also, if I disconnect the power of the board and reconnect it, first time, I see the similar issue. After pressing reset button on board, it works.

    Not sure what's going on here.

    Is there a way we can init the external lash at run time (not from the overlay)? I may be reiterating but our usecase is to use external flash for OTA purpose.

    Thanks!

Reply
  • 0

    Hi Hakon,

    Thanks for keeping a tab on this. 

    Few points to consider:

    1. I tried with slower speed 1M, and it didn't help. Our routing is not so long, Flash is right next to the BLE module.
    2. I checked the datasheet of Flash and I believe the parameters in overlay are correct. Also, it works always when I reset the board using the reset button on the board.
    3. The issue is I see this error, whenever I program it using JTAG and JTAG resets the board, it doesn't detect the SPI. Also, if I disconnect the power of the board and reconnect it, first time, I see the similar issue. After pressing reset button on board, it works.

    Not sure what's going on here.

    Is there a way we can init the external lash at run time (not from the overlay)? I may be reiterating but our usecase is to use external flash for OTA purpose.

    Thanks!

Children
  • 0 in reply to embeddedER

    Hi,

     

    embeddedER said:
    The issue is I see this error, whenever I program it using JTAG and JTAG resets the board, it doesn't detect the SPI. Also, if I disconnect the power of the board and reconnect it, first time, I see the similar issue. After pressing reset button on board, it works.

    thank you for clarifying!

    Q1: Could you confirm if another debug reset puts the device into a good state? If yes, I think I have an idea on what can have happened here.

    Q2: Could you try to run this command before flashing the device to see if the issue still appears?

    nrfjprog -e

    This will erase the nRF first.

     

    If the device now behaves normal after initial programming, I believe it can be related to a reset before flashing the new program. If your old program is also present in flash, it will boot up for a small period of time and can leave the SPI-NOR flash in a mid-sequence operation before the nRF is re-flashed.

     

    Kind regards,

    Håkon

Related