Writing data to SDCard at 1mSec interval using FatFShttps://devzone.nordicsemi.com/f/nordic-q-a/67645/writing-data-to-sdcard-at-1msec-interval-using-fatfsHi There, I&#39;m working on a datalogger project using nrf52840, includes BLE also. I&#39;m using external 24 channel ADC and should be able to log data to the SDCard at the rate of 1000 samples/sec. I&#39;m trying to write to the SDCard using FatFS. Is it reallyen-USTelligent Community 13Wed, 28 Oct 2020 10:24:39 GMTRE: Writing data to SDCard at 1mSec interval using FatFShttps://devzone.nordicsemi.com/thread/277340?ContentTypeID=1Wed, 28 Oct 2020 10:24:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:110225b0-84fa-4b01-84f5-cd0a9357e674awneil<p>FatFs is an independent 3rd-party product - nothing to do with Nordic - you&#39;d need to contact ChaN for specific questions on its capabilities:&nbsp;<a href="http://elm-chan.org/fsw/ff/00index_e.html">http://elm-chan.org/fsw/ff/00index_e.html</a></p> <p>You could look at the nRF52840 Product Specification for details of the performance of its SPI controller ...</p><div style="clear:both;"></div>RE: Writing data to SDCard at 1mSec interval using FatFShttps://devzone.nordicsemi.com/thread/277327?ContentTypeID=1Wed, 28 Oct 2020 10:00:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:61eee771-cbbc-4340-8e59-c478b7da84f3vijaysk<p>Hi Simon,</p> <p>My question is not about storing that amount of data. Can we actually write to the SDCard at that rate(1000 samples/sec) using FatFS?</p><div style="clear:both;"></div>RE: Writing data to SDCard at 1mSec interval using FatFShttps://devzone.nordicsemi.com/thread/277296?ContentTypeID=1Wed, 28 Oct 2020 08:34:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ee3579ce-cf1a-46cf-9e93-d49ec59bcbe3Simonr<p>Thank you for clarifying, my mistake then.</p> <p>Please check out the <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/group__app__sdcard.html">SD card library</a> and the <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/app_sdcard_example.html">SD card example</a>. Depending on the SD card you&#39;re using, you should be able to store this amount of data onto the SD card.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>RE: Writing data to SDCard at 1mSec interval using FatFShttps://devzone.nordicsemi.com/thread/277179?ContentTypeID=1Tue, 27 Oct 2020 14:48:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:21b2a6c0-f2e3-4e83-a95d-b3f337cb3463vijaysk<p>The speed mentioned is just writing to the SDCard. My intention was to mention that the BLE will also be running with some custom services.</p><div style="clear:both;"></div>RE: Writing data to SDCard at 1mSec interval using FatFShttps://devzone.nordicsemi.com/thread/277154?ContentTypeID=1Tue, 27 Oct 2020 13:27:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:497407ec-a661-4ab9-bb0e-df6cd05c5682awneil<p>Not sure if the intention was for that to be the speed over BLE - just the speed to the SD Card ?</p> <p>Hopefully <a href="https://devzone.nordicsemi.com/members/vijaysk">vijaysk</a> can clarify ... ?</p><div style="clear:both;"></div>RE: Writing data to SDCard at 1mSec interval using FatFShttps://devzone.nordicsemi.com/thread/277140?ContentTypeID=1Tue, 27 Oct 2020 12:57:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:90d1325c-2dc0-4a70-a31e-cf14538a3b22Simonr<p>Hi</p> <p>180 kilobytes/s plus overheads will translate to roughly 2 Mbits/s which will not be attainable over BLE. Please check out<a href="https://www.novelbits.io/bluetooth-5-speed-maximum-throughput/"> this blog post</a> on how to maximize throughput over BLE which suggests approximately what speeds you can expect.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>RE: Writing data to SDCard at 1mSec interval using FatFShttps://devzone.nordicsemi.com/thread/276992?ContentTypeID=1Mon, 26 Oct 2020 23:56:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ba8d7bfe-6b94-4de2-b9c7-095940e10c38vijaysk<p>Yes, you are right.</p><div style="clear:both;"></div>RE: Writing data to SDCard at 1mSec interval using FatFShttps://devzone.nordicsemi.com/thread/276991?ContentTypeID=1Mon, 26 Oct 2020 23:54:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f8594db1-2b5c-42c0-9ff9-9c2c9ddcaf92awneil<p>So 180k byte/s - plus any overheads ...</p><div style="clear:both;"></div>RE: Writing data to SDCard at 1mSec interval using FatFShttps://devzone.nordicsemi.com/thread/276989?ContentTypeID=1Mon, 26 Oct 2020 23:45:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:688ae33a-db96-41d3-902b-19d49949b161vijaysk<p>The samples are of variable lengths and the maximum is 180 Bytes.</p><div style="clear:both;"></div>RE: Writing data to SDCard at 1mSec interval using FatFShttps://devzone.nordicsemi.com/thread/276988?ContentTypeID=1Mon, 26 Oct 2020 23:39:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fe2009dc-e897-42e1-8977-292a687d9079awneil<p>How big are the samples?</p><div style="clear:both;"></div>