Iam implementing FATFS with USB mass storage on external flash(QSPI). it already having developed dfu in internal flash
********Overlay*******
&qspi {
status = "okay";
pinctrl-0 = <&qspi_default>;
pinctrl-1 = <&qspi_sleep>;
pinctrl-names = "default", "sleep";
p25q16h: p25q16h@0 {
compatible = "nordic,qspi-nor";
reg = <0>;
sck-frequency = <104000000>;
quad-enable-requirements = "S2B1v1";
jedec-id = [85 60 15];
sfdp-bfp = [
e5 20 f1 ff ff ff ff 00 44 eb 08 6b 08 3b 80 bb
ee ff ff ff ff ff 00 ff ff ff 00 ff 0c 20 0f 52
10 d8 08 81
];
label = "qspi_flash"; // Optional
size = <16777216>; //size is in bits
has-dpd;
t-enter-dpd = <3000>;
t-exit-dpd = <8000>;
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
fatfs_part: partition@0 {
label = "fatfs_storage";
reg = <0x00000000 0x00200000>; /* Start address and size = 2MB */
};
};
};
};
&flash0 {
status = "okay";
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
boot_partition: partition@0 {
label = "mcuboot";
reg = <0x00000000 0x0000C000>;
};
mcuboot_primary: partition@c000 {
label = "image-0" ; //"mcuboot_primary";
reg = <0x0000C000 0x00076000>;
};
mcuboot_secondary: partition@82000 {
label = "image-1" ; //"mcuboot_secondary";
reg = <0x00082000 0x00076000>;
};
/*
* The flash starting at 0x000f8000 and ending at
* 0x000fffff is reserved for use by the application.
*/
/*
* Storage partition will be used by FCB/LittleFS/NVS
* if enabled.
*/
storage_partition: partition@f8000 {
label = "storage";
reg = <0x000f8000 0x00008000>;
};
};
};
***********pm_static.yaml**************
fatfs_part:
address: 0x00000000
size: 0x200000
device: p25q16h
region: external_flash
******code*************
static FATFS fat_fs;
struct fs_file_t file;
struct fs_dirent dirent;
struct fs_mount_t fatfs_mnt = {
.type = FS_FATFS,
.fs_data = &fat_fs,
.mnt_point = "/NAND",
.storage_dev = (void *)FIXED_PARTITION_ID(fatfs_storage),
};
int rc;
rc = disk_access_init("FLASH");
if (rc != 0)
{
printf("Disk init failed (%d)\n", rc);
}
// Get disk status
uint32_t sector_count, sector_size;
rc = disk_access_ioctl("FLASH", DISK_IOCTL_GET_SECTOR_COUNT, §or_count);
if (rc == 0)
{
printf("Sector count: %u,\n", sector_count);
}
else
{
printf("Failed to get sector count: %d\n", rc);
}
rc = disk_access_ioctl("FLASH", DISK_IOCTL_GET_SECTOR_SIZE, §or_size);
if (rc == 0)
{
printf("Sector size: %u\n", sector_size);
}
else
{
printf("Failed to get sector size: %d\n", rc);
}
// Try to read first sector to verify disk access
rc = disk_access_read("FLASH", test_buf, 0, 1);
if (rc == 0)
{
printf("Disk read test successful\n");
}
else
{
printf("Disk read test failed: %d\n", rc);
//return 0;
}
rc = fs_mount(&fatfs_mnt);
if (rc < 0)
{
printf("FATFS mount failed (%d), Attempting to format.\n", rc);
// uintptr_t dev_id = (uintptr_t)FIXED_PARTITION_ID(fatfs_part);
// rc = fs_mkfs(FS_FATFS, dev_id, NULL, 0);
rc = fs_mkfs(FS_FATFS, "FLASH", NULL, 0);
if (rc < 0)
{
printf("Format failed (%d)\n", rc);
return 0;
}
rc = fs_mount(&fatfs_mnt);
if (rc < 0)
{
printf("Mount failed after format (%d)\n", rc);
return 0;
}
}
printf("mount successfully....%s\n", fatfs_mnt.mnt_point);
***********build errors******************
D:/ncs/v2.9.0/nrf/include/flash_map_pm.h:47:22: error: 'PM_ext_fs_ID' undeclared here (not in a function) 47 | #define PM_ID(label) PM_##label##_ID | ^~~ D:/ncs/v2.9.0/nrf/include/flash_map_pm.h:52:35: note: in expansion of macro 'PM_ID' 52 | #define FIXED_PARTITION_ID(label) PM_ID(label) | ^~~~~ D:/FYZKS/Wearable_Steth/26_06_2025_WDS/src/pd_application.c:51:28: note: in expansion of macro 'FIXED_PARTITION_ID' 51 | .storage_dev = (void *)FIXED_PARTITION_ID(fatfs_part),
