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RL-FlashFS PageRead and PageWrite functions

Dear forum members,
I am using Keil RF-FlashFS with STM32F2xx MCU and NAND memory. NAND is interfaced using FSMC controller. I am trying to use the function PageWrite() and PageRead() (from file NAND_STM32F2xx.c) for writing and reading directly to and from NAND memory. The function PageWrite is returning value RTV_NOERR but when I try to read the same memory, it is returning all FFs (0xFF). I am writing 0xAA as data. What is the failure reason?

Thanks in advance for any help.

Mike.

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