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Phil.
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Joined: 20/11/2017
Location: United Kingdom
Posts: 9

Posted: 12:13pm 20 Nov 2017

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Can you address an SD card from a Standard Micromite? No. Well why not?
Must be the Firmware overhead exceeds the available space. It's got the pins.
Any way to push this limit?

Why am I asking? Well I can talk to a uSD card from PIC16F876 (for example) using Assembly to a 4D Systems Microdrive via serial. Works well.

But 4D Systems have stopped selling the Microdrive. None anywhere. Bother!

Jumping from Pics to Micromite seems do-able - I can see the steps but haven't jumped yet. But Micromite Plus seems a very big leap. It can do stuff I don't need.

It's like buying a wedding cake when all you really wanted was a cereal bar.
Talking to an SD card directly looks really tricky so I am not surprised it takes a lot of Firmware. All too hard for me.

So is there a way for a simple controller to talk to SD? By the way, Rasp-Pi and Arduino's look just as hard.

First post. A wind turbine on my house would definitely get feedback from my neighbours in suburban Essex, UK!

twofingers

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Joined: 02/06/2014
Location: Germany
Posts: 1671

Posted: 01:30pm 20 Nov 2017

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Hi Phil,
this is what you can do with a Micromite (MM2) and a SD card. For more more useful informations, please read Peters (matherp) profil. The "bigger" MMs do the SD card support much better!
Best Regards and welcome to the TBS
Michael

causality ≠ correlation ≠ coincidence

matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 10565

Posted: 01:51pm 20 Nov 2017

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This thread has the latest version

twofingers

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Joined: 02/06/2014
Location: Germany
Posts: 1671

Posted: 02:01pm 20 Nov 2017

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@Peter
ooops! Sorry!

causality ≠ correlation ≠ coincidence

Phil.
Newbie

Joined: 20/11/2017
Location: United Kingdom
Posts: 9

Posted: 02:58pm 20 Nov 2017

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Thanks each. Looks good. Now the work starts!

For info I survey the local creek and estuary for my yacht club. So log GPS and depth on a uSD card and process back home on a PC running Basic to make charts.

I wanted to store tide data and do some sums while afloat. Maybe show corrected depth while surveying. Might be a long job. For interest here are links to the results so far.

http://www.benfleetyachtclub.org/files/Moorings/Ray_Charts_Part1_Nov_2016.pdf
http://www.benfleetyachtclub.org/files/Moorings/Ray_Charts_Part2_Nov_2016.pdf

Thanks again. I would never have found those refs without you.

CaptainBoing

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Joined: 07/09/2016
Location: United Kingdom
Posts: 2171

Posted: 05:01pm 20 Nov 2017

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Hello Phil. Nice project!

matherp produced the gerbers for a navigation based MMeXtreme (I think White Wizzard on here might still have some - ww?)

This would make an ideal base for your project as it has a slot for a readily available and cheap GPS module, SDCard slot and MMXbasic (so you can write to the card natively) and even VGA output so if you want to plug it into a small monitor on your boat - the world opens up with what you could do with this while afloat - even realtime charting? It has bags or memory and is easily fast enough. I got one a while back and it provides a punchy little computer board with everything onboard (mine was for off-roading).

Coming from a PIC background, One thing to be mindful of - beware the MicroMite PICS are all 3.3V on their supply - there are 5V tolerant I/O pins on them (but not all)... So if you are looking to go to a MM in as a replacement/brain transplant you need to be aware. Sorry if I am teaching you to suck eggs.Edited by CaptainBoing 2017-11-22

WhiteWizzard
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Joined: 05/04/2013
Location: United Kingdom
Posts: 2959

Posted: 10:58pm 20 Nov 2017

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CaptainBoing said matherp produced the gerbers for a navigation based MMeXtreme (I think White Wizzard on here might still have some - ww?)

Yep - currently have 6 of these nice PCBs available. Can customise assembly if that helps - simply email me (although I am just catching up on the E100 BackOrders so may need a day or two before I can fully build one).

WW

Phil.
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Joined: 20/11/2017
Location: United Kingdom
Posts: 9

Posted: 03:58pm 21 Nov 2017

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That all looks a bit mega and extreme for me. The sort of project that never gets finished. Thank you guys but I think I was looking for the simplest MM that would read a uSD card. If you can store data simply and share it with a PC there are so many possibilities. I will keep looking. Thanks again. Phil.

twofingers

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Joined: 02/06/2014
Location: Germany
Posts: 1671

Posted: 06:29pm 21 Nov 2017

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@Phil,
maybe this is something useful for you (regarding data-logging on a cheap 8MB EEProm)?

Michael

causality ≠ correlation ≠ coincidence

Phil.
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Joined: 20/11/2017
Location: United Kingdom
Posts: 9

Posted: 07:27pm 21 Nov 2017

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Wow! Impressive. Thanks. Every MM could have one. I need to get to know these - all new to me. Phil.

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