Hi
I am using the nrf52832 with zephyr os , NCS 1.9.1, also using the external flash as a secondary slot, using a nor flash
I tried to upgrade my app but i an error occurred in img_mgmt.c --function img_mgmt_read_info in the NCS while checking the magic number
else if (hdr.ih_magic == erased_val_32) {
printf("MGMT_ERR_ENOENT 5 \n"); // print for debug only
return MGMT_ERR_ENOENT;
Is there any modification i have to do to make this work also I checked and the failure is in slot 1 which is the secondary slot and slot 0 erased without problem 
int
img_mgmt_read_info(int image_slot, struct image_version *ver, uint8_t *hash,
uint32_t *flags)
{
printf("img_mgmt_read_info \n");
#if IMG_MGMT_DUMMY_HDR
uint8_t dummy_hash[] = {0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x00, 0x11, 0x22,
0x33, 0x44, 0x55, 0x66, 0x77};
if (!hash && !ver && !flags) {
return 0;
}
if (hash) {
memcpy(hash, dummy_hash, IMG_MGMT_HASH_LEN);
}
if (ver) {
memset(ver, 0xff, sizeof(*ver));
}
if (flags) {
*flags = 0;
}
return 0;
#endif
struct image_header hdr;
struct image_tlv tlv;
size_t data_off;
size_t data_end;
bool hash_found;
uint8_t erased_val;
uint32_t erased_val_32;
int rc;
rc = img_mgmt_impl_erased_val(image_slot, &erased_val);
if (rc != 0) {
return MGMT_ERR_EUNKNOWN;
}
printf("img_mgmt_impl_erased_val image_slot = %d \n", image_slot);
rc = img_mgmt_impl_read(image_slot, 0, &hdr, sizeof(hdr));
if (rc != 0) {
return MGMT_ERR_EUNKNOWN;
}
printf("img_mgmt_impl_read \n");
if (ver != NULL) {
printf("ver null\n");
memset(ver, erased_val, sizeof(*ver));
}
erased_val_32 = ERASED_VAL_32(erased_val);
if (hdr.ih_magic == IMAGE_MAGIC) {
if (ver != NULL) {
memcpy(ver, &hdr.ih_ver, sizeof(*ver));
}
} else if (hdr.ih_magic == erased_val_32) {
printf("MGMT_ERR_ENOENT 5 \n");
return MGMT_ERR_ENOENT;
} else {
printf("MGMT_ERR_EUNKNOWN 6 \n");
return MGMT_ERR_EUNKNOWN;
}
if (flags != NULL) {
*flags = hdr.ih_flags;
}
printf("img_mgmt_find_tlvs before 1\n");
/* Read the image's TLVs. We first try to find the protected TLVs, if the protected
* TLV does not exist, we try to find non-protected TLV which also contains the hash
* TLV. All images are required to have a hash TLV. If the hash is missing, the image
* is considered invalid.
*/
data_off = hdr.ih_hdr_size + hdr.ih_img_size;
rc = img_mgmt_find_tlvs(image_slot, &data_off, &data_end, IMAGE_TLV_PROT_INFO_MAGIC);
if (!rc) {
/* The data offset should start after the header bytes after the end of
* the protected TLV, if one exists.
*/
data_off = data_end - sizeof(struct image_tlv_info);
}
rc = img_mgmt_find_tlvs(image_slot, &data_off, &data_end, IMAGE_TLV_INFO_MAGIC);
if (rc != 0) {
return MGMT_ERR_EUNKNOWN;
}
printf("img_mgmt_find_tlvs 2 \n");
hash_found = false;
while (data_off + sizeof(tlv) <= data_end) {
rc = img_mgmt_impl_read(image_slot, data_off, &tlv, sizeof(tlv));
if (rc != 0) {
return MGMT_ERR_EUNKNOWN;
}
printf("img_mgmt_impl_read 1\n");
if (tlv.it_type == 0xff && tlv.it_len == 0xffff) {
return MGMT_ERR_EUNKNOWN;
}
if (tlv.it_type != IMAGE_TLV_SHA256 || tlv.it_len != IMAGE_HASH_LEN) {
/* Non-hash TLV. Skip it. */
data_off += sizeof(tlv) + tlv.it_len;
continue;
}
if (hash_found) {
/* More than one hash. */
return MGMT_ERR_EUNKNOWN;
}
hash_found = true;
data_off += sizeof(tlv);
if (hash != NULL) {
if (data_off + IMAGE_HASH_LEN > data_end) {
printf("MGMT_ERR_EUNKNOWN 1 \n");
return MGMT_ERR_EUNKNOWN;
}
rc = img_mgmt_impl_read(image_slot, data_off, hash,
IMAGE_HASH_LEN);
printf("img_mgmt_impl_read 2\n");
if (rc != 0) {
printf("MGMT_ERR_EUNKNOWN 2 \n");
return MGMT_ERR_EUNKNOWN;
}
}
}
if (!hash_found) {
printf("MGMT_ERR_EUNKNOWN \n");
return MGMT_ERR_EUNKNOWN;
}
return 0;
}In the end i am getting an mpu fail
Any suggestion ?
Thanks a lot
Ibrahim
