Others have had similar problems with pointers for structures. So, I've tried several different methods including one that was suggested in another help ticket. I am writing a block structure so I tried using (uint8_t *) &fstorage pointers to no effect.
Here's my code:
/*****************************************************************************************
FStorage Flash EXAMPLE
******************************************************************************************/
static void fstorage_evt_handler(nrf_fstorage_evt_t * p_evt);
NRF_FSTORAGE_DEF(nrf_fstorage_t fstorage) =
{
/* Set a handler for fstorage events. */
.evt_handler = fstorage_evt_handler,
/* These below are the boundaries of the flash space assigned to this instance of fstorage.
* You must set these manually, even at runtime, before nrf_fstorage_init() is called.
* The function nrf5_flash_end_addr_get() can be used to retrieve the last address on the
* last page of flash available to write data. */
.start_addr = 0x3e000,
.end_addr = 0x3ffff,
};
/* Dummy data to write to flash. */
static uint32_t m_data = 0xBADC0FFE;
static char m_hello_world[] = "hello world";
#define FLASH_ADDR 0x3e000
/**@brief Helper function to obtain the last address on the last page of the on-chip flash that
* can be used to write user data. */
static uint32_t nrf5_flash_end_addr_get()
{
uint32_t const bootloader_addr = NRF_UICR->NRFFW[0];
uint32_t const page_sz = NRF_FICR->CODEPAGESIZE;
uint32_t const code_sz = NRF_FICR->CODESIZE;
return (bootloader_addr != 0xFFFFFFFF ?
bootloader_addr : (code_sz * page_sz));
}
// *@brief Sleep until an event is received.
static void power_manage(void)
{
(void) sd_app_evt_wait();
}
static void fstorage_evt_handler(nrf_fstorage_evt_t * p_evt)
{
if (p_evt->result != NRF_SUCCESS)
{
NRF_LOG_INFO("--> Event received: ERROR while executing an fstorage operation.");
return;
}
switch (p_evt->id)
{
case NRF_FSTORAGE_EVT_WRITE_RESULT:
{
NRF_LOG_INFO("--> Event received: wrote %d bytes at address 0x%x.",
p_evt->len, p_evt->addr);
} break;
case NRF_FSTORAGE_EVT_ERASE_RESULT:
{
NRF_LOG_INFO("--> Event received: erased %d page from address 0x%x.",
p_evt->len, p_evt->addr);
} break;
default:
break;
}
}
static void print_flash_info(nrf_fstorage_t * p_fstorage)
{
NRF_LOG_INFO("========| flash info |========");
NRF_LOG_INFO("erase unit: \t%d bytes", p_fstorage->p_flash_info->erase_unit);
NRF_LOG_INFO("program unit: \t%d bytes", p_fstorage->p_flash_info->program_unit);
NRF_LOG_INFO("==============================");
}
void wait_for_flash_ready(nrf_fstorage_t const * p_fstorage)
{
// While fstorage is busy, sleep and wait for an event.
while (nrf_fstorage_is_busy(p_fstorage))
{
power_manage();
}
}
/****************** Erase Flash ***************************/
/* This is the address in flash page to be erased.
The address below is presented as an example to illustrate the API. */
void erase_flash_block(void)
{
ret_code_t rc;
static uint32_t pages_to_erase = 1;
// #define FLASH_ADDR 0x3e000 // defined in global area. Shown here clarity
rc = nrf_fstorage_erase(
&fstorage, // The instance to use.
FLASH_ADDR, // The address of the flash pages to erase.
pages_to_erase, // The number of pages to erase.
NULL // Optional parameter, backend-dependent.
);
if (rc == NRF_SUCCESS)
{
// The operation was accepted.
// Upon completion, the NRF_FSTORAGE_ERASE_RESULT event
// is sent to the callback function registered by the instance.
}
else
{
// Handle error.
}
}
//int main(void)
int flash_init(void)
{
//typedef enum { FALSE = 0, TRUE = 1, } BOOL; // copy of global section shown here for clarity
/*
struct blockstruct // block to write into flash.
{
int desired_temp; // Last water temperature requested by user.
int desired_flow; // same
int user_max_temp;
int absolute_max_temp;
bool startup_done;
bool install_mode;
bool initialization_done;
bool clockwise_heat;
int shower_timer;
bool temp_scale;
int user_last_preset;
int user_last_temp;
} flashblock, readflashblock;
*/
// Fill flash structure with known data to test flash writes and reads
flashblock.desired_temp = 75; // Last water temperature requested by user.
flashblock.desired_flow = 2; // same
flashblock.user_max_temp = 103;
flashblock.absolute_max_temp = 115;
flashblock.startup_done = 0;
flashblock.install_mode = 0;
flashblock.initialization_done = 1;
flashblock.clockwise_heat = 1;
flashblock.shower_timer = 13;
flashblock.temp_scale = 0;
erase_flash_block();
wait_for_flash_ready(&fstorage);
NRF_LOG_INFO("Done Erasing.");
ret_code_t rc;
NRF_LOG_INFO("fstorage example started.");
nrf_fstorage_api_t * p_fs_api;
NRF_LOG_INFO("Initializing nrf_fstorage_sd implementation...");
/* Initialize an fstorage instance using the nrf_fstorage_sd backend.
* nrf_fstorage_sd uses the SoftDevice to write to flash. This implementation can safely be
* used whenever there is a SoftDevice, regardless of its status (enabled/disabled). */
p_fs_api = &nrf_fstorage_sd;
rc = nrf_fstorage_init(&fstorage, p_fs_api, NULL);
APP_ERROR_CHECK(rc);
// Print out the flash structure to the debug window
print_flash_info(&fstorage);
/* It is possible to set the start and end addresses of an fstorage instance at runtime.
* They can be set multiple times, should it be needed. The helper function below can
* be used to determine the last address on the last page of flash memory available to
* store data. */
(void) nrf5_flash_end_addr_get();
// Let's write to flash.
// NRF_LOG_INFO("Writing \"%x\" to flash.", m_data);
NRF_LOG_INFO("Writing \"%d\" to flash.", flashblock.desired_temp);
NRF_LOG_INFO("Writing \"%x\" to flash.", flashblock.desired_flow);
NRF_LOG_INFO("Writing \"%d\" to flash.", flashblock.user_max_temp);
NRF_LOG_INFO("Writing \"%d\" to flash.", flashblock.absolute_max_temp);
NRF_LOG_INFO("Writing \"%h\" to flash.", flashblock.startup_done);
NRF_LOG_INFO("Writing \"%h\" to flash.", flashblock.install_mode);
NRF_LOG_INFO("Writing \"%h\" to flash.", flashblock.initialization_done);
NRF_LOG_INFO("Writing \"%h\" to flash.", flashblock.clockwise_heat);
NRF_LOG_INFO("Writing \"%d\" to flash.", flashblock.shower_timer);
NRF_LOG_INFO("Writing \"%h\" to flash.", flashblock.temp_scale);
// rc = nrf_fstorage_write(&fstorage, 0x3e000, &m_data, sizeof(m_data), NULL);
rc = nrf_fstorage_write(&fstorage, 0x3e000, (uint8_t*) &flashblock, sizeof(flashblock), NULL);
// rc = nrf_fstorage_write(&fstorage, 0x3e000, &flashblock, sizeof(flashblock), NULL);
APP_ERROR_CHECK(rc);
wait_for_flash_ready(&fstorage);
NRF_LOG_INFO("Done Writing.");
// Read the information back and put into new structure
/****************** Read Flash ***************************/
/* This is the address in flash where data will be read.
The address below is presented as an example to illustrate the API.
*/
//#define FLASH_ADDR 0x3e000 // defined in global area. Shown here for clarity
rc = nrf_fstorage_read(
&fstorage, // The instance to use.
FLASH_ADDR, // The address in flash where to read data from.
(uint8_t*) &readflashblock, // A buffer to copy the data into.
sizeof(readflashblock) // Lenght of the data, in bytes.
);
if (rc == NRF_SUCCESS)
{
// The operation was accepted.
}
else
{
// Handle error.
}
wait_for_flash_ready(&fstorage);
NRF_LOG_INFO("Done Reading.");
// Now read back the data
NRF_LOG_INFO("Read back data \"%d\" from flash.", readflashblock.desired_temp);
NRF_LOG_INFO("Read back data \"%x\" from flash.", readflashblock.desired_flow);
NRF_LOG_INFO("Read back data \"%d\" from flash.", readflashblock.user_max_temp);
NRF_LOG_INFO("Read back data \"%d\" from flash.", readflashblock.absolute_max_temp);
NRF_LOG_INFO("Read back data \"%h\" from flash.", readflashblock.startup_done);
NRF_LOG_INFO("Read back data \"%h\" from flash.", readflashblock.install_mode);
NRF_LOG_INFO("Read back data \"%h\" from flash.", readflashblock.initialization_done);
NRF_LOG_INFO("Read back data \"%h\" from flash.", readflashblock.clockwise_heat);
NRF_LOG_INFO("Read back data \"%d\" from flash.", readflashblock.shower_timer);
NRF_LOG_INFO("Read back data \"%h\" from flash.", readflashblock.temp_scale);
m_data = 0xDEADBEEF;
NRF_LOG_INFO("Writing \"%x\" to flash.", m_data);
rc = nrf_fstorage_write(&fstorage, 0x3e100, &m_data, sizeof(m_data), NULL);
APP_ERROR_CHECK(rc);
wait_for_flash_ready(&fstorage);
NRF_LOG_INFO("Done.");
NRF_LOG_INFO("Writing \"%s\" to flash.", m_hello_world);
rc = nrf_fstorage_write(&fstorage, 0x3f000, m_hello_world, sizeof(m_hello_world), NULL);
APP_ERROR_CHECK(rc);
wait_for_flash_ready(&fstorage);
NRF_LOG_INFO("Done.");
}
I copied the block structures from the global area into this flash routine for clarity so you can see what I am trying to write. Here's my debug info:
