https://devzone.nordicsemi.com/f/nordic-q-a/38577/flash-questionsQuestion 1 : I write 512 words to flash but only can get some value right .and some value was wrong. I used fs_store( &amp;one_min_data, (uint32_t *)(FLASH_DATA_ADRR), (uint32_t *)(&amp;buffer), 512, NULL); The value should be 0 -511 .but the valueen-USTelligent Community 13Mon, 17 Sep 2018 13:18:44 GMThttps://devzone.nordicsemi.com/thread/149056?ContentTypeID=1Mon, 17 Sep 2018 13:18:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b52cc467-387d-4db0-8b21-85312027e482yangshuanghua<p>Thank you .I have tried for days to find the answer .thank you again .</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/149053?ContentTypeID=1Mon, 17 Sep 2018 13:13:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:53f5cf7a-02f9-483a-b37a-449d005b130bJ&#248;rgen Holmefjord<p>Yes, fstorage use asynchronous write and erase operations. You need to wait for the event before you can read back the written data, if not the operation might not be completed.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/149045?ContentTypeID=1Mon, 17 Sep 2018 13:01:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9c6d350b-1ab7-44a9-9309-8a6bca2ea990yangshuanghua<p>I found something&nbsp;</p> <p>If&nbsp;I just&nbsp; wait for event and do nothing after I call&nbsp;&nbsp;</p> <p><span>&nbsp;fs_store( &amp;one_min_data,</span></p> <p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (uint32_t *)(FLASH_DATA_ADRR),</span></p> <p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (uint32_t *)(&amp;buffer),</span></p> <p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 512,</span></p> <p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; NULL);</span></p> <p><span>It will be OK.&nbsp;</span></p> <p>like this&nbsp;</p> <p></p> <p>kk=fs_store( &amp;one_min_data,<br /> (uint32_t *)(FLASH_DATA_ADRR),<br /> buffer_text,<br /> 512,<br /> NULL);</p> <p>while(1)<br /> {<br /> if (NRF_LOG_PROCESS() == false)//将保存的LOG都吐出来之后进入休眠<br /> {<br /> uint32_t err_code = sd_app_evt_wait();<br /> APP_ERROR_CHECK(err_code);<br /> }<br /> <br /> }</p> <p>SO my question is that should I wait the complete event.and do nothing before that,just SD_app_evt_wait();</p> <p>until I resieve a flag whith be set by the complete event .like below</p> <p></p> <p>void one_min_data_flash_ok_event(fs_evt_t const * const evt, fs_ret_t result)<br />{<br /> if(evt-&gt;id==FS_EVT_STORE &amp;&amp; result==FS_SUCCESS)<br />&nbsp; recieve_flag=1;<br />}</p> <p></p> <p>{......</p> <p>kk=fs_store( &amp;one_min_data,<br />(uint32_t *)(FLASH_DATA_ADRR),<br />buffer_text,<br />512,<br />NULL);</p> <p><span>recieve_flag=0;</span></p> <p>while(<span>recieve_flag!=1</span>)<br />{<br />if (NRF_LOG_PROCESS() == false)<br />{<br />uint32_t err_code = sd_app_evt_wait();<br />APP_ERROR_CHECK(err_code);<br />}<br /><br />}</p> <p>}</p> <p>IS the only way?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/149041?ContentTypeID=1Mon, 17 Sep 2018 12:51:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:398e8a14-3b6a-448e-9f96-4e9a610c3312yangshuanghua<p>I found something ,if I write&nbsp;</p> <p><span>&nbsp;fs_store( &amp;one_min_data,</span></p> <p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (uint32_t *)(FLASH_DATA_ADRR),</span></p> <p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (uint32_t *)(&amp;buffer),</span></p> <p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 512,</span></p> <p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; NULL);</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/149040?ContentTypeID=1Mon, 17 Sep 2018 12:51:29 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cfe8381f-6479-4564-a751-70a8ae90775eyangshuanghua<p>I found something ,if I write&nbsp;</p> <p><span>&nbsp;fs_store( &amp;one_min_data,</span></p> <p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (uint32_t *)(FLASH_DATA_ADRR),</span></p> <p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (uint32_t *)(&amp;buffer),</span></p> <p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 512,</span></p> <p><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; NULL);</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/149027?ContentTypeID=1Mon, 17 Sep 2018 12:18:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b8fba1a9-c9c6-48bc-9e40-0e02430098c5yangshuanghua<p>PCA1004.and I&#39;ll tell you the pin set .wait for a moment&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/149026?ContentTypeID=1Mon, 17 Sep 2018 12:18:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fd2746c8-74cb-419a-b952-52dd93f7eb8cyangshuanghua<p>PCA1004.and I&#39;ll tell you the pin set .wait for a moment&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/149024?ContentTypeID=1Mon, 17 Sep 2018 12:16:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:873b5c17-9cd9-4665-9ede-bdfae5c3b8a1J&#248;rgen Holmefjord<p>Sure, please provide your project. Which board are you testing this on?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/149023?ContentTypeID=1Mon, 17 Sep 2018 12:14:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:495dcf3d-4ba9-4540-b36c-a689eff5d42byangshuanghua<p>before I write&nbsp;<span>&nbsp;the memory all be 0xFFFFFFFF. and the error code is FS_SUCCESS,and the complete event is called .Can you get a boad and have a test .I Can give you my&nbsp;project to test .</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/149020?ContentTypeID=1Mon, 17 Sep 2018 12:06:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:baeda1d4-7503-4f08-8283-85999c5d9158J&#248;rgen Holmefjord<p>Hi,</p> <p>How do the memory area look before you try try to write it? Note that you cannot write to flash if it is not erased first. You should also check the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v12.3.0/group__fstorage.html#gaf94976860d509d5c8d28c6d3bbb9a059">error code</a> returned from the function call, and the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v12.3.0/group__fstorage.html#ga7d7c3e91fa4f4614eaf115069db12374">return code</a> in the callback when the operation is finished.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>