wait_for_flash_ready(&fstorage); The cycle is here.

[john.liu]

Hi:

I use nRF5_SDK_15.0.0_a53641a\examples\ble_peripheral\ble_app_buttonless_dfu.

I want to add flash operation.

The code is as follows.

mian()

{

...............

..............

#if FLASH_ENABLED
uint8_t i;
uint32_t uc[6];
uint32_t rc;
static uint32_t pages_to_erase = 1;
nrf_fstorage_api_t * p_fs_api;
p_fs_api = &nrf_fstorage_sd;

rc = nrf_fstorage_init(&fstorage, p_fs_api, NULL);
APP_ERROR_CHECK(rc);

rc = nrf_fstorage_erase(
&fstorage, /* The instance to use. */
0x51000, /* 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)
{
NRF_LOG_INFO("nrf_fstorage_erase success.");
}
else
{
NRF_LOG_INFO("nrf_fstorage_erase error.");
}
wait_for_flash_ready(&fstorage);
NRF_LOG_INFO("Done.");

for(i=0;i<6;i++)
{
uc[i]=(uint32_t)m_password[i];
}
rc = nrf_fstorage_write(&fstorage, 0x51200, uc, sizeof(uc), NULL);
APP_ERROR_CHECK(rc);
wait_for_flash_ready(&fstorage);
NRF_LOG_INFO("Done.");

for(i=0;i<6;i++)
{
uc[i]=0x0000;
}
rc = nrf_fstorage_read(&fstorage, 0x51200, uc,6*4);
APP_ERROR_CHECK(rc);

for(i=0;i<6;i++)
{
NRF_LOG_INFO("%d",(uint8_t)uc[i]);
}

#endif

...................

...................

}

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();
}
}

But stayed at wait_for_flash_ready() all the time.(I refer to nRF5_SDK_15.0.0_a53641a\examples\peripheral\flash_fstorage.I don't know where there is difference.)

[Hung Bui]

Hi John, 

Could you send the whole main.c file you have ? How did you call NRF_FSTORAGE_DEF ? 

Staying a loop waiting for the flash operation to finish may not be the best idea, you can think of using the call back (fstorage_evt_handler) to check if the operation is completed or not (set/clear a flag) 

[john.liu]

3240.main.cThank you help.This is main.c.

[Hung Bui]

Hi John, 
I tested your code here and don't think there is any problem, it run smoothly. Please try (SDKv15.0, PCA10040, RTT log)

ble_app_buttonless_dfu - TestFstorage.zip

[john.liu]

I used SDK15.But I transplanted RTOS to buttonless.So I tested ble_app_hrs_freertos and found that flash operation would be problematic after ble_stack_init().

[Hung Bui]

Hi John, 

I don't have much experience with RTOS (FreeRTOS you used ?), but it seems like a deadlock with RTOS, you would need to use semaphore when you use fstorage.