Does BANK1 gets erased after successfull OTA upgrade via BLE

[Vignesh R]

Hi,

Iam using "pca10056_s140_ble" secure bootloader example for my project.

FYI. My project gets its new firmware from internet and stores it in BANK1 memory using GSM module.

My question is:

1.Whether the secure bootloader erases the BANK1 memory by itself after an successful firmware update via BLE or do we have to erase the contents of BANK1 memory before i try to write something in it??

TIA.

[Vignesh R]

Oh okay, understood..

So you said that each page gets erased whenever a new request is created on the fly, what if the no.of pages required for new firmware is lesser than the no.of pages used for the previous firmware in BANK1, does the remaining pages of old firmware in BANK1 gets erased??

BTW, Pardon me for further questioning...Just curious to know...

[helsing]

Hi Vignesh, sorry for the delay.

If the new image is smaller, I would assume some pages are not overwritten and will remain intact. However, I will double check this.

[Vignesh R]

No worries brother,

I had this issue, where the crc of new firmware in BANK1 mismatches on posvalidation process, after when i added fstorage_erase for BANK1 before storing the firmware, then everything worked fine

But i dont know how the process happens via BLE, that's why i asked here

[helsing]

Vignesh R said:

what if the no.of pages required for new firmware is lesser than the no.of pages used for the previous firmware in BANK1, does the remaining pages of old firmware in BANK1 gets erased?

Only the pages needed for the write will be erased. So, some pages will remain in flash, containing data from older images.