Not able to update firmware over UART using MCUboot: flag shows pending

[lorao]

I tried to update firmware over UART (using MCUboot).

The flag shows test pending, and was able to test the application and provide expected output.

But was not able to "confirm image", it shows Error:NMP timeout, when the confirm image command is executed.

Thanks in advance

[Sigurd Hellesvik]

Hi,

Did you ever restart your application during the DFU procedure?

Do you use Serial Recovery or an SMP Server in the application? (See my unofficial tutorial on MCUboot to learn the difference)

Regards,
Sigurd Hellesvik

[lorao]

Hi Sigurd Hellesvik 
Yes I'm using a example  samples/subsys/mgmt/mcumgr/smp_svr  from NCS v2.2

I executed commands as shown below:

Case:1 (I did reset)

mcumgr <connection string> image test <hash of slot-1 image>

sudo mcumgr <connection string> reset

After the test, it reverts back.

Case:2
And by using the command : sudo mcumgr <connection string> image confirm , it works without reverting the images.

So,

1. What should be done in case 1, so that the image files are not reverted after reset.

2. In case 2, how can I update with a new image again (for the 2nd time), because I assume the images are swapped in this case after 1st update and it no longer receives  mcumgr command. 

It shows  Error:NMP timeout, when trying to execute mcumgr command.

[lorao]

 Sigurd Hellesvik  I have implemented UART handler to call sys_reboot(SYS_REBOOT_COLD).
And using bootloader from your example mcuboot_serial_recovery_uart by adding 

# Enable wait for DFU functionality

CONFIG_BOOT_SERIAL_WAIT_FOR_DFU=y

CONFIG_BOOT_SERIAL_WAIT_FOR_DFU_TIMEOUT=10000

And it does not start bootloader after reboot.
Please can you suggest, if something else needs to be taken care of.

Thank you!

[Sigurd Hellesvik]

Does the bootloader run if you reboot the device manually? (via button or reset pin)

Also, try to set CONFIG_MCUBOOT_INDICATION_LED for MCUboot, and see if the LED lights up

[lorao]

 Sigurd Hellesvik Yes by pressing button 1 while power cycle the bootloader runs fine.
Also LED lights up (LED 1) for  mcuboot_serial_recovery_uart

But not with reset button

[Sigurd Hellesvik]

This works fine on my end.

Turns out that CONFIG_MCUBOOT_INDICATION_LED only works for Button mode, and is not supported for Wait mode.

If you want to enable this for Wait mode, you can apply these changes  temporarily to MCUboot:

diff --git a/boot/zephyr/main.c b/boot/zephyr/main.c
index 2c5f9afd..3081f845 100644
--- a/boot/zephyr/main.c
+++ b/boot/zephyr/main.c
@@ -620,9 +620,14 @@ void main(void)
      * some time, so it's better to reuse thistime to already receive the
      * initial mcumgr command(s) into our buffers
      */
+
+#ifdef CONFIG_MCUBOOT_INDICATION_LED
+        gpio_pin_set_dt(&led0, 1);
+#endif
     rc = boot_console_init();
     int timeout_in_ms = CONFIG_BOOT_SERIAL_WAIT_FOR_DFU_TIMEOUT;
     uint32_t start = k_uptime_get_32();
+
 #endif
 
     FIH_CALL(boot_go, fih_rc, &rsp);
@@ -646,6 +651,10 @@ void main(void)
         timeout_in_ms = 1;
     }
     boot_serial_check_start(&boot_funcs,timeout_in_ms);
+
+#ifdef CONFIG_MCUBOOT_INDICATION_LED
+        gpio_pin_set_dt(&led0, 0);
+#endif
 #endif
 
     if (FIH_NOT_EQ(fih_rc, FIH_SUCCESS)) {

Are you able to see that sys_reboot(SYS_REBOOT_COLD) works with these changes?

[lorao]

 Sigurd Hellesvik Now the bootloader lit's up the LED for 5 sec and waits for mcumgr command and if there are no commands send in 5 sec then LED turn off (works as expected)

But after updating the application firmware, and resetting the device, then later the LED turns ON back after 5 secs and never runs the application.

And it works fine if the below configs are not included:

# Enable wait for DFU functionality

CONFIG_BOOT_SERIAL_WAIT_FOR_DFU=y

CONFIG_BOOT_SERIAL_WAIT_FOR_DFU_TIMEOUT=10000

 

[Sigurd Hellesvik]

lorao said:

CONFIG_BOOT_SERIAL_WAIT_FOR_DFU=y

CONFIG_BOOT_SERIAL_WAIT_FOR_DFU_TIMEOUT=10000

I tried this briefly, and I can update the application multiple times.

Can you upload a zip of the sample you use so I can use that to reproduce?

[lorao]

 Sigurd Hellesvik Please find the attachment below:
Issue: I can update the image file but the application does not run after update And also it stays in the bootloader mode.
Thank you

[Sigurd Hellesvik]

Your sample works for me. See the recording:

[lorao]

 Sigurd Hellesvik Thank you so much for the feedback.
I will try it again if not then I will use 'ncs 2.4.0' version.

Also in my case I dont see the 'hash' value as shown below:

Images:
image=0 slot=0
version: 0.0.0.0
bootable: false
flags:
hash: Unavailable
Split status: N/A (0)

Any reason why

[Sigurd Hellesvik]

In v2.4.0, Serial Recovery was upgraded to print some more information about the image.

What you see is expected before v2.4.0