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NVS_Handle nvsHandle;
NVS_Attrs regionAttrs;
NVS_Params nvsParams;
NVS_init();
NVS_Params_init(&nvsParams);
nvsHandle = NVS_open(CONFIG_NVSEXTERNAL, &nvsParams);
if (nvsHandle == NULL)
{
LOG( LOG_RAW, LOG_INFO, LOG_MASK_UNSPEC | LOG_MASK_PASSIVE, "memory open fail\n" );
}
/*
* This will populate a NVS_Attrs structure with properties specific
* to a NVS_Handle such as region base address, region size,
* and sector size.
*/
NVS_getAttrs(nvsHandle, ®ionAttrs);
/*
* Copy "sizeof(signature)" bytes from the NVS region base address into
* buffer.
*/
int16_t returnValue = NVS_read(nvsHandle, 0, (void *)buffer, sizeof(signature));
if( returnValue == NVS_STATUS_SUCCESS )
{
LOG( LOG_RAW, LOG_INFO, LOG_MASK_UNSPEC | LOG_MASK_PASSIVE, "Read SPI flash OK");
}
/*
* Determine if the NVS region contains the signature string.
* Compare the string with the contents copied into buffer.
*/
if (strcmp((char *)buffer, (char *)signature) == 0)
{
/* Write buffer copied from flash to the console. */
LOG( LOG_RAW, LOG_INFO, LOG_MASK_UNSPEC | LOG_MASK_PASSIVE, "%s", buffer);
LOG( LOG_RAW, LOG_INFO, LOG_MASK_UNSPEC | LOG_MASK_PASSIVE, "Erasing SPI flash sector...");
/* Erase the entire flash sector. */
NVS_erase(nvsHandle, 0, regionAttrs.sectorSize);
}
else
{
/* The signature was not found in the NVS region. */
LOG( LOG_RAW, LOG_INFO, LOG_MASK_UNSPEC | LOG_MASK_PASSIVE, "Writing signature to SPI flash...");
/*
* Write signature to memory. The flash sector is erased prior
* to performing the write operation. This is specified by
* NVS_WRITE_ERASE.
*/
NVS_erase(nvsHandle, 0, regionAttrs.sectorSize);
NVS_write(nvsHandle, 0, (void *)signature, sizeof(signature), NVS_WRITE_ERASE | NVS_WRITE_POST_VERIFY);
}
