NRF9160dk storing to and reading from flash

Question

What is the best/easiest way to store a struct or string to flash persistently? I see other boards using FDS and other tools but those don't appear to be available on this board. Are there any examples that write and read to and from flash? I see DT_FLASH_AREA_6_DEV_LABEL=STORAGE so I assume I'm going to want to use that section of flash for my needs? 
 
 Any guidance would be much appreciated!

Jace · Accepted Answer

I was able to figure it out. Zephyr has a library called NVS. In my prj.conf I added: CONFIG_FLASH=y CONFIG_FLASH_PAGE_LAYOUT=y CONFIG_NVS=y and then my code looks like this: #include #include #include { static struct nvs_fs fs; struct flash_pages_info info; fs.offset = DT_FLASH_AREA_STORAGE_OFFSET; err = flash_get_page_info_by_offs(device_get_binding(DT_FLASH_DEV_NAME), fs.offset, &info); if (err) { printk("Unable to get page info"); } fs.sector_size = info.size; fs.sector_count = 3U; err = nvs_init(&fs, DT_FLASH_DEV_NAME); if (err) { printk("Flash Init failed "); } char wbuf[16]; char rbuf[16]; strcpy(wbuf, "Hello"); nvs_write(&fs, DT_FLASH_AREA_STORAGE_OFFSET, &wbuf, strlen(wbuf)+1); err = nvs_read(&fs, DT_FLASH_AREA_STORAGE_OFFSET, &rbuf, sizeof(rbuf)); printk("%s", rbuf); }

NRF9160dk storing to and reading from flash

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