No free slot DFU issue

[IvanR]

I'm trying to enable DFU on our device but am getting a lot of issues. 

I used Device Manager to upload  app_update.bin and it worked. If I use Flutter example to upload firmware I need to use dfu_application.zip. This is where issues arise. Firmware is uploaded but then it fails to update. 

If I go to the Device Manager app I can see that Image Slot 0-1 is taken by new firmware but I can't confirm it or erase it. I get no free slot(9) error. Now I cant upload new firmware using Device manager as it is also giving me no free slot(9) error when uploading new firmware. 

  external_flash (0x800000 - 8192kB):
+-----------------------------------------------+
| 0x0: mcuboot_secondary (0xf0000 - 960kB)      |
| 0xf0000: littlefs_storage (0x710000 - 7232kB) |
| 0x800000: external_flash (0x0 - 0B)           |
+-----------------------------------------------+

  flash_primary (0x100000 - 1024kB):
+--------------------------------------------------+
| 0x0: mcuboot (0x15000 - 84kB)                    |
| 0x15000: EMPTY_0 (0x3000 - 12kB)                 |
+---0x18000: mcuboot_primary (0xe8000 - 928kB)-----+
| 0x18000: mcuboot_pad (0x200 - 512B)              |
+---0x18200: mcuboot_primary_app (0xe7e00 - 927kB)-+
| 0x18200: app (0xe7e00 - 927kB)                   |
+--------------------------------------------------+

  otp (0x2fc - 764B):
+------------------------------+
| 0xff8100: otp (0x2fc - 764B) |
+------------------------------+

  sram_primary (0x80000 - 512kB):
+-----------------------------------------------+
| 0x20000000: pcd_sram (0x2000 - 8kB)           |
| 0x20002000: sram_primary (0x6e000 - 440kB)    |
| 0x20070000: rpmsg_nrf53_sram (0x10000 - 64kB) |
+-----------------------------------------------+

 CPUNET flash_primary (0x40000 - 256kB):
+--------------------------------------------+
+---0x1000000: b0n_container (0x8800 - 34kB)-+
| 0x1000000: b0n (0x8580 - 33kB)             |
| 0x1008580: provision (0x280 - 640B)        |
+---0x1008800: app (0x37800 - 222kB)---------+
| 0x1008800: hci_ipc (0x37800 - 222kB)       |
+--------------------------------------------+

 CPUNET sram_primary (0x10000 - 64kB):
+-------------------------------------------+
| 0x21000000: sram_primary (0x10000 - 64kB) |
+-------------------------------------------+

[Sigurd Hellesvik]

Hi,

Have you seen our DevAcademy on bootloaders and DFU?

If not, give that a go and let me know if you still have the same issues.

I'm trying to enable DFU on our device but am getting a lot of issues. 

Did you test DFU on an example first?

Regards,
Sigurd Hellesvik

[IvanR]

Yes, I did. But when I apply it to our project I get the above error.

[Sigurd Hellesvik]

I asked two questions, could you answer both?

[IvanR]

? I did, and tested the DFU on an example

[Sigurd Hellesvik]

Thanks, I understand better now.

If I go to the Device Manager app I can see that Image Slot 0-1 is taken by new firmware but I can't confirm it or erase it. I get no free slot(9) error. Now I cant upload new firmware using Device manager as it is also giving me no free slot(9) error when uploading new firmware. 

What exactly does Device Manager list for the slots?

Does MCUboot log anything when you reset the device?

[IvanR]

The only thing I get is when I try to read images using the device manager.

Our board is custom and I get no output during boot. 

mcumgr_img_grp: Failed to open flash area ID 2: -2

[Sigurd Hellesvik]

We had some public holidays here, which caused a delay.

I do not have any other specific guesses, so let us take a step back and try to do generic debugging:

Do you use a custom board?
If yes, do your code work on the DK?