CRITICAL_REGION_ENTER()/EXIT() Error

[awtlex]

Hi ,

 Have a problem,pls help

Software: nRF5_SDK_15.3.0  (ble_app_hrs_freertos)

Hardware: nRF52832

In the User Appication Code,Using CRITICAL_REGION_ENTER()/EXIT() API，will result in CPU Halted.

As in Figure below：

======================================================================

INT32U __flashRead(INT32U uiSrcAddr, INT32U *puiRtn, INT32U uiNumToRead)
{
osStatus osRtn;
ret_code_t rc;

// CRITICAL_REGION_ENTER();

rc = nrf_fstorage_read(&fstorage,uiSrcAddr, puiRtn, uiNumToRead);
APP_ERROR_CHECK(rc);

// CRITICAL_REGION_EXIT();

return HAL_OK;
}

======================================================================

[Susheel Nuguru]

You cannot have nrf_fstorage_read inside the critical region since CRITICAL_REGION_ENTER will disable the application interrupts including SVC.  

After that calling nrf_fstorage_read will in turn call SVC with interrupts disabled will create a hardfault.

If you are trying to make fstorage run in thread safe way, then this is not the correct way to do it.

You need to have the critical section around the fstorage events. What exactly are you trying to do?

[awtlex]

Thanks for your answer. I  need  to make fstorage(Flash read/write/erase)run  in thread safe, How need I  to do？ Have  a  example ? 

[Susheel Nuguru]

Unfortunately, we do not have any such example at the moment.