reading incorrect data from fstorage after using J-Link script to upgrade firmware

[snowuyl]

Before using J-Link script to upgrade firmware,  offsetStart (0x0) and offsetEnd (0x32E06) are correct. But after using J-Link script to upgrade firmware, offsetStart (0xADDEFE01) and offsetEnd (0x1EF1FFFF) are not correct.

log messages of before using J-Link script to upgrade firmware.

 0> <debug> app: endAddr=0x7FFFF
 0> <debug> app: startAddr=0x7F000
 0> <debug> app: nrf_fstorage_read() e
 0>
 0> <debug> app: nrf_fstorage_read() x
 0>
 0> <debug> app: record
 0>
 0> <debug> app: offsetStart=0x0
 0>
 0> <debug> app: offsetEnd=0x32E06

log messages of after using J-Link script to upgrade firmware.

0> <debug> app: endAddr=0x7FFFF
 0> <debug> app: startAddr=0x7F000
 0> <debug> app: nrf_fstorage_read() e
 0>
 0> <debug> app: nrf_fstorage_read() x
 0>
 0> <debug> app: record
 0>
 0> <debug> app: offsetStart=0xADDEFE01
 0>
 0> <debug> app: offsetEnd=0x1EF1FFFF

[snowuyl]

Jlink_flash_nRF52832.zip

[Susheel Nuguru]

Which memory address are you trying to read? where does the offsetSTart and offsetEND reside in the flash? How should I test this before and after? I only see softdevice and app hex file, so which version do i compare the results with? 

Also which logs are you using? I do not see anything on RTT or serial (CDC) after flashing the softdevice and application hex file you gave.

[snowuyl]

I read memory address from 0x7F000. I am using rtt. I will provide Python3 program fo you to reproduce this issue.

[snowuyl]

PyQt6.rar

[snowuyl]

Step to reproduce this issue.

1. Unzip PyQt6.rar

2. Open command prompt

3. python3 main.py

4. Press scan button

5. Chose "ANCS2" and then press connect button

6. Press measure button and wait 5 seconds

7. Press read button

8. Running J-Link script to upgrade firmware

9. Repeat step 4, 5, 7