Unable to erase entire external flash on nrf5340dk

RE: Unable to erase entire external flash on nrf5340dk

Shuhao Dong — Tue, 08 Apr 2025 19:27:17 GMT

Hi, yes I understand the erase should be performed on a sector size alignment. As a mentioned in my original question, I simply call flah_erase () function in a while loop, erase a single sector (4KB) in each iteration, till the end address of the flash. But this procedure stops with error code -5 at address around 0x502000, which is only 995 sectors.

RE: Unable to erase entire external flash on nrf5340dk

Amanda Hsieh — Mon, 07 Apr 2025 19:02:57 GMT

[quote user="Shuhao Dong"]But again, some error code reported misalignment of sector size if I do so. [/quote]

What did you modify in the sample?

Remember that flash erase operations happen on a page-by-page basis (typically 4KB pages for external flash), so you need to respect these boundaries when performing erase operations.

RE: Unable to erase entire external flash on nrf5340dk

Shuhao Dong — Mon, 07 Apr 2025 08:31:13 GMT

Hello, I am using this sample at the moment. I can see somen comments in the code says, specify the area to be erased to be the same as the flash size then should erase the entir flash. But again, some error code reported misalignment of sector size if I do so.

RE: Unable to erase entire external flash on nrf5340dk

Amanda Hsieh — Fri, 04 Apr 2025 12:31:02 GMT

Hi,

You can refer to this sample: https://github.com/nrfconnect/sdk-zephyr/tree/main/samples/drivers/spi_flash

Regards,
Amanda H.