nRF SoC flash

Overview

This sample demonstrates using the Flash API on an SoC internal flash. The sample uses Flash map API to obtain device for flash, using DTS node label, and then directly uses Flash API to perform flash operations.

Within the sample, user may observe how read/write/erase operations are performed on a device, and how to first check whether device is ready for operation.

Building and Running

The application will build for any SoC with internal flash memory access enabled, as it is default for SoC devices, and fixed-partition defined over that internal flash labeled slot1_partition, when CONFIG_TRUSTED_EXECUTION_NONSECURE is not selected, or slot1_ns_partition, when the Kconfig option is selected.

west build -b nrf52840dk/nrf52840 samples/drivers/soc_flash_nrf
west flash

Sample Output

*** Booting Zephyr OS build v2.7.99-17621-g54832687bcbb ***

Nordic nRF5 Flash Testing
=========================

Test 1: Flash erase page at 0x82000
   Flash erase succeeded!

Test 2: Flash write (word array 1)
   Attempted to write 1122 at 0x82000
   Attempted to read 0x82000
   Data read: 1122
   Data read matches data written. Good!
   Attempted to write aabb at 0x82004
   Attempted to read 0x82004
   Data read: aabb
   Data read matches data written. Good!
   Attempted to write abcd at 0x82008
   Attempted to read 0x82008
   Data read: abcd
   Data read matches data written. Good!
   Attempted to write 1234 at 0x8200c
   Attempted to read 0x8200c
   Data read: 1234
   Data read matches data written. Good!

Test 3: Flash erase (2 pages at 0x80000)
   Flash erase succeeded!

Test 4: Flash write (word array 2)
   Attempted to write 1234 at 0x82000
   Attempted to read 0x82000
   Data read: 1234
   Data read matches data written. Good!
   Attempted to write aabb at 0x82004
   Attempted to read 0x82004
   Data read: aabb
   Data read matches data written. Good!
   Attempted to write abcd at 0x82008
   Attempted to read 0x82008
   Data read: abcd
   Data read matches data written. Good!
   Attempted to write 1122 at 0x8200c
   Attempted to read 0x8200c
   Data read: 1122
   Data read matches data written. Good!

Test 5: Flash erase page at 0x82000
   Flash erase succeeded!

Test 6: Non-word aligned write (word array 3)
   Attempted to write 1122 at 0x82001
   Attempted to read 0x82001
   Data read: 1122
   Data read matches data written. Good!
   Attempted to write aabb at 0x82005
   Attempted to read 0x82005
   Data read: aabb
   Data read matches data written. Good!
   Attempted to write abcd at 0x82009
   Attempted to read 0x82009
   Data read: abcd
   Data read matches data written. Good!
   Attempted to write 1234 at 0x8200d
   Attempted to read 0x8200d
   Data read: 1234
   Data read matches data written. Good!
   Attempted to write 1122 at 0x82011
   Attempted to read 0x82011
   Data read: 1122
   Data read matches data written. Good!
   Attempted to write aabb at 0x82015
   Attempted to read 0x82015
   Data read: aabb
   Data read matches data written. Good!
   Attempted to write abcd at 0x82019
   Attempted to read 0x82019
   Data read: abcd
   Data read matches data written. Good!
   Attempted to write 1234 at 0x8201d
   Attempted to read 0x8201d
   Data read: 1234
   Data read matches data written. Good!

Test 7: Page layout API
   Offset  0x00041234:
     belongs to the page 65 of start offset 0x00041000
     and the size of 0x00001000 B.
   Page of number 37 has start offset 0x00025000
     and size of 0x00001000 B.
     Page index resolved properly
   SoC flash consists of 256 pages.

Test 8: Write block size API
   write-block-size = 1

Finished!