Read CPUNET Image Firmware Version from CPUAPP at Run Time

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

Amanda Hsieh — Wed, 09 Oct 2024 13:36:13 GMT

I can reproduce the issue with v2.5.3 sdk-nrf/test/subsys/pcd on the nrf5340dk. I have reported the problem to the internal. Before the issue is fixed, maybe you can consider enabling Downgrade protection (nordicsemi.com) instead of handling it yourself.

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

samtday — Tue, 08 Oct 2024 20:11:41 GMT

I cloned the sdk-nrf repo and built the test project located at sdk-nrf/test/subsys/pcd for the nrf5340dk. Updating my SDK is not an option as I cannot do that for my final application. I need a solution for v2.5.3.

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

Amanda Hsieh — Tue, 08 Oct 2024 20:04:36 GMT

Your prj.conf:10 seems different to the sample v2.5.3/tests/subsys/pcd/prj.conf#L10

Did you modify the test sample? If not, try to update SDK via ToolChain Manager:

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

samtday — Tue, 08 Oct 2024 18:23:37 GMT

See attached issues.

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

samtday — Tue, 08 Oct 2024 18:20:40 GMT

Amanda: that test does not build in with NCS toolchain & sdk v2.5.3. It is crucial my solution can run on v2.5.3.

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

Amanda Hsieh — Mon, 07 Oct 2024 22:57:11 GMT

We are using this function in this test. Can you try this test and see if it works?

Maybe you can compare the test with your application and see if you could find anything missing.

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

samtday — Mon, 07 Oct 2024 15:10:17 GMT

Any other thoughts on this?

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

samtday — Wed, 02 Oct 2024 18:38:46 GMT

It is a uint32_t and that does not help. I had tried changing it to a uint8_t array and that did not help either.

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

Amanda Hsieh — Wed, 02 Oct 2024 18:33:51 GMT

Could you try to define cpuNetVersion with uint32_t? Does it help?

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

samtday — Wed, 02 Oct 2024 17:24:12 GMT

The error is coming from ncs/v2.5.3/nrf/subsys/pcd/src/pcd.c lines 193 and 177. These lines are the call to pcd_cmd_write, then a line wihtin that function.

Here is the code I am using to retrieve the version from within main.

	uint32_t cpuNetVersion = 0;

	int error = pcd_network_core_app_version((uint8_t *) &cpuNetVersion, sizeof(cpuNetVersion));

Here is the code within pcd.c that is failing.

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

Amanda Hsieh — Wed, 02 Oct 2024 15:48:08 GMT

You can use addr2line to find the code at r14/r15. See Debugging with addr2line.

Could you provide the code for r14/lr: 0x000317d7 and r15/pc: 0x00041126, and the snippet of your code?

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

samtday — Tue, 01 Oct 2024 16:17:57 GMT

E: ***** BUS FAULT *****
E:   Precise data bus error
E:   BFAR Address: 0x20000000
E: r0/a1:  0xdca345ea  r1/a2:  0x20000000  r2/a3:  0x00000004
E: r3/a4:  0x00008800 r12/ip:  0x00000001 r14/lr:  0x000317d7
E:  xpsr:  0x29000200
E: Faulting instruction address (r15/pc): 0x00041126
E: >>> ZEPHYR FATAL ERROR 25: Unknown error on CPU 0
E: Current thread: 0x20003888 (main)
E: Halting system

I got the following error when I ran my code. It seems to fail from within the pcd_cmd_write function in pcd.c

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

Amanda Hsieh — Tue, 01 Oct 2024 15:31:57 GMT

Please provide the log with enabling the following configs:

CONFIG_DEBUG_OPTIMIZATIONS – Limits the optimizations done by the compiler to only those that do not impact debugging.
CONFIG_DEBUG_THREAD_INFO – Adds additional information to the thread object so the debugger can discover the threads.

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

samtday — Tue, 01 Oct 2024 14:45:43 GMT

Hi, Thank you for this. I have tried using this function from within my CPUAPP main (before the while loop). I am hitting a hard fault from within the call. Is there something I could be missing?

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

Amanda Hsieh — Mon, 30 Sep 2024 15:31:47 GMT

Hi,

I would like to correct my answer.

You can use pcd_network_core_app_version() for reading the peripheral CPU application version number by enabling CONFIG_PCD_READ_NETCORE_APP_VERSION. Here is the example https://github.com/nrfconnect/sdk-nrf/blob/v2.5.3/modules/mcuboot/hooks/nrf53_hooks.c#L43

-Amanda H.

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

samtday — Fri, 27 Sep 2024 21:51:07 GMT

I had seen that post. I currently do not have a way to print from the NetCore application other than enabling RTT (which is only useful while debugging anyway) but when RTT is enabled, it seems to cause the ble to fail to initialize. I assume this has to do with the NetCore handling the soft device.

We do not want to implement downgrade protection incase we want to revert to a previous version of the application but I do see its value. Is there a way to utilize the versioning used in downgrade protection to be readable via ble, maybe via the DFU BLE Service?

RE: Read CPUNET Image Firmware Version from CPUAPP at Run Time

Amanda Hsieh — Fri, 27 Sep 2024 13:00:46 GMT

Hi,

I don't think the cpuapp code can read the version of NetCore, but you can refer to my example in this post to get the NetCore version.

Regards,
Amanda H.