Sample QSPI example Flash read giving 88 in read buffer

[McGregor]

Hello developers,

I am currently using nRF52840 DK and want to integrate external flash in my already developed Open Thread based application. My idea is to store 200-300 sample data from sensor into external flash memory and send all data at specific interval from my end device in single payload via MQTT-SN. The MQTT-SN part is already developed and i am looking for help and guidance in the flash interface.

I started with peripheral example QSPI present in nrf5 SDK although without any success. The Erase, Read, Write process doesn't give error logs but it also doesn't read the data properly. It always give me 0x88 0x88 in the read buffer. Here are the logs of the following sample example:

<info> app: QSPI write and read example using 24bit addressing mode
<info> app: QSPI example started.
<info> app: Process of erasing first block start
<info> app: Process of writing data start
<info> app: Data read
<info> app: Compare...
<info> app: Data inconsistent
<info> app: QSPI write and read example using 24bit addressing mode
<info> app: QSPI example started.
<info> app: Process of erasing first block start
<info> app: Process of writing data start
<info> app: Data read
<info> app: Compare...
<info> app: Data inconsistent

I have checked my DK the jumpers as written in docs are soldered perfectly So this isn't a hardware issue. How should i run the sample QSPI example successfully.

So can anyone please help me ?

[McGregor]

No the program doesn't stuck anywhere and it doesn't even wait for the erase procedure. It just print out all the logs as mentioned in my post with inconsistent data as result.

[mrono]

Could this be an alignment issue? I think I had to add the equivalent of align(4) to the tx & rx buffers to make the qspi example work.