NOR flash - Can I partition the memory of 1 device?

Question

I am using Azure FileX on an embedded processor (the Micron MT25TL01G chip), and it is working. But I would prefer to partition the memory into 2 sections (this will allow speeding up initialization when the chip is unformatted - I only need to initially initialize a small amount of the flash). Is it possible to just partition a small section of the chip, and even better, can I initialize 2 or more partitions? How would I go about doing this?

Mike

Answer 1

@Mike Wilson Yes, you can format a small section of the memory by specifying a smaller sector count when calling fx_media_format. When formatting other partitions, you can use hidden_sectors parameter to specify start sector number for the partition. But FileX does not support writing partition tables, you may need to implement your own code to build partition table. Additional logic may be needed in the driver to find the starting sector for each partition when handling FX_DRIVER_BOOT_READ and FX_DRIVER_BOOT_WRITE requests. For example, you may use driver_info_ptr to pass the start sector number of the partition to the driver, then driver can access to correct partition.