SDcard Logger with FIFO and FIR Filter (FreeRtos)

Post here first, or if you can't find a relevant section!
victor_pv
Posts: 947
Joined: Mon Apr 27, 2015 12:12 pm

Re: SDcard Logger with FIFO and FIR Filter (FreeRtos)

Postby victor_pv » Mon Feb 13, 2017 3:20 pm

michael_l wrote:This is the closest I could find based on your recommendation. Quite many seem to have LDO regulator. This one does not but it still has some resistors. Can you recommed this ? Thanks.

http://www.ebay.co.uk/itm/LC-Technology ... SwARZXoem~


Michael that should work, and in the worst case if the resistors affect some way, you can just short them with a blop of solder, but you won't likely need to do that.

stevestrong
Posts: 724
Joined: Mon Oct 19, 2015 12:06 am
Location: Munich, Germany

Re: SDcard Logger with FIFO and FIR Filter (FreeRtos)

Postby stevestrong » Mon Feb 13, 2017 3:23 pm

michael_l wrote: Can you recommed this ? http://www.ebay.co.uk/itm/LC-Technology ... SwARZXoem~

This is an alternative: https://www.aliexpress.com/item/1Pcs-Mi ... 76747.html

@BennehBoy, your data recording rate/amount (4Hz/20bytes) should work without any problem.

User avatar
Pito
Posts: 611
Joined: Sat Mar 26, 2016 3:26 pm
Location: Rapa Nui

Re: SDcard Logger with FIFO and FIR Filter (FreeRtos)

Postby Pito » Tue Feb 14, 2017 12:08 pm

victor_pv wrote:
michael_l wrote:This is the closest I could find based on your recommendation. Quite many seem to have LDO regulator. This one does not but it still has some resistors. Can you recommed this ? Thanks.

http://www.ebay.co.uk/itm/LC-Technology ... SwARZXoem~


Michael that should work, and in the worst case if the resistors affect some way, you can just short them with a blop of solder, but you won't likely need to do that.

That Sdcard module works fine, I am using it, I recommended it in a separate post already.
viewtopic.php?f=9&t=1701

Do NOT short the resistors, as those resistors are the 10k pull-ups.

User avatar
Pito
Posts: 611
Joined: Sat Mar 26, 2016 3:26 pm
Location: Rapa Nui

Re: SDcard Logger with FIFO and FIR Filter (FreeRtos)

Postby Pito » Tue Feb 14, 2017 12:21 pm

BennehBoy wrote:So, question, am I likely yo be impacted by this or is my output volume 'under the threshold'?

As described above, the writing onto an Sdcard depends on many factors..

michael_l
Posts: 212
Joined: Mon Aug 24, 2015 6:11 pm

Re: SDcard Logger with FIFO and FIR Filter (FreeRtos)

Postby michael_l » Sat Mar 11, 2017 5:21 pm

Thanks guys, been too busy with other tasks but now got a change to try this. When I insert the cars blue board resets - is this normal and what causes this ?

User avatar
Pito
Posts: 611
Joined: Sat Mar 26, 2016 3:26 pm
Location: Rapa Nui

Re: SDcard Logger with FIFO and FIR Filter (FreeRtos)

Postby Pito » Sun Mar 12, 2017 8:42 am

It is not normal when you insert the sdcard and the BP resets.
Double check wiring. The sdcard module needs 3.3V.
Last edited by Pito on Sun Mar 12, 2017 6:04 pm, edited 1 time in total.

zmemw16
Posts: 979
Joined: Wed Jul 08, 2015 2:09 pm
Location: St Annes, Lancs,UK

Re: SDcard Logger with FIFO and FIR Filter (FreeRtos)

Postby zmemw16 » Sun Mar 12, 2017 2:27 pm

card detect switch crossed with the reset line ?
minor edit
Last edited by zmemw16 on Sun Mar 12, 2017 6:19 pm, edited 2 times in total.

User avatar
Pito
Posts: 611
Joined: Sat Mar 26, 2016 3:26 pm
Location: Rapa Nui

Re: SDcard Logger with FIFO and FIR Filter (FreeRtos)

Postby Pito » Sun Mar 12, 2017 6:07 pm

Also check with an ohmmeter the possible shorts between the sdcard's socket pins (all combinations). The socket disconnected from BP during the measurement..


Return to “General discussion”

Who is online

Users browsing this forum: Bing [Bot] and 2 guests