https://devzone.nordicsemi.com/f/nordic-q-a/25120/nrf51822-sdk12-hangs-after-flash-writei am in very strange problem and was unable to debug it i am using following code to write 16 bytes data to flash memory, my app hangs after executing custom_flash_write function. function works as expected ( flash is erased , data is written and fucntionen-USTelligent Community 13Thu, 14 Sep 2017 10:43:48 GMThttps://devzone.nordicsemi.com/thread/98949?ContentTypeID=1Thu, 14 Sep 2017 10:43:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f3580566-84f0-4220-b584-16260770948cPetter Myhre<p>Great! And thank you for sharing.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/98948?ContentTypeID=1Thu, 14 Sep 2017 10:39:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a2f33f40-d1a5-4b63-b4f5-ce8c4c0603afbindassdost<p>thanks for your help but i had found the problem. flash_write takes more than 1 ms delay which blocks my sysTick interrupt and thus rtc1 counter value overflows systick cc value. this block my clock driver and creates a effect of app hang</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/98944?ContentTypeID=1Thu, 14 Sep 2017 09:01:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e09f8df0-4bc8-41e7-b139-e5c2e3c32655Petter Myhre<p>Hmmm. Would it be possible for you to share the complete project? So I can test it here?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/98945?ContentTypeID=1Thu, 14 Sep 2017 06:53:48 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4576685c-2b6c-42f2-af5c-ba574f6c7714bindassdost<p>i am using SDK_12.3 with SD130_2.0.1 i am trying to erase 192 page and writing at address 0x30000</p> <p>strange thing is, i am using same code in my custom bootloader where it works fine. but in app this code hangs after executing flash write successfully</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/98943?ContentTypeID=1Wed, 13 Sep 2017 09:08:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1d6d8deb-ed9e-46db-b968-756ae25b110aPetter Myhre<p>Which SoftDevice are you using? Which page are you trying to erase? Which address are you trying to write to?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/98947?ContentTypeID=1Wed, 13 Sep 2017 00:45:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:176281a1-ea4a-4683-88bd-0e797a668accbindassdost<p>i am calling these functions in main</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/98946?ContentTypeID=1Tue, 12 Sep 2017 12:45:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c7e6f73c-1287-4162-9649-49d7ed23e412secondbest<p>You must write or erase your flash inside main while. I hope it can help you.</p><div style="clear:both;"></div>