RE: HardFault Error after calling nrf_nvmc_page_erase

Dexterity — Mon, 24 Feb 2020 11:22:06 GMT

Hello Sigurd. I solved the issue by using your hint that ACL is in use. It was indeed the ACL block that prohibited me to write at the area I had designed to use for a proprietary data.

So my bootloader called nrf_bootloader_app_start_final which again called nrf_bootloader_flash_protect(BOOTLOADER_START_ADDR, BOOTLOADER_SIZE + NRF_MBR_PARAMS_PAGE_SIZE, NRF_BOOTLOADER_READ_PROTECT);

So I solved the issue by decreasing the BOOTLOADER_SIZE value thereby allowing my application to erase the data at 0xF7000 where my proprietary data resides.

RE: HardFault Error after calling nrf_nvmc_page_erase

Sigurd — Mon, 17 Feb 2020 18:29:00 GMT

Hi,

What data are you trying to erase at 0xF7000 ?

Are you sure that your bootloader is at 0xE0000 ? If yes, how big is the bootloader ?

If you are using the bootloader variant pca10056_s140_ble_debug, it will by default occupy the flash at 0xF7000, and since the bootloader is using ACL to protect itself from being overwritten(nrf_bootloader_flash_protect), a busfault will happen if you try to erase 0xF7000, or any other page that is protected by ACL.