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Grogster
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Posted: 19 June 2016 at 3:02am | IP Logged Quote Grogster

Okey dokey, understood. I just wanted to make sure, as I was pestering matherp for something a little different then what his original code premise was.

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Phil23
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Posted: 19 June 2016 at 5:44am | IP Logged Quote Phil23

Grogster wrote:

The first thing you will need to know, is if you need to use multi-byte words to store the variables, and what kind of data it is.

Typically 2 digit temperatures, like:-

27.25 etc.
Probably doesn't need 2 decimal precision.

Just 27.2 would suffice.

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Out of interest, and before I get too involved in this idea, is there any reason you cannot use the MM's built-in VAR SAVE command?


Did that for a bit, used VAR SAVE, but I wanted to save the latest MAX/MIN each time it changed & didn't want to wear out the flash.

Lot's of Shutdowns & restarts happening while I'm developing & testing hardware, & didn't want to lose values each time the device is powered off or rebooted.

Even using VAR SAVE once every 5 minutes would have been getting close to 20,000 writes in a day.

I wasn't coding to only save on a change. That seemed difficult with the precision of the Floating variable.

Cheers

Phil





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centrex
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Posted: 19 June 2016 at 7:24am | IP Logged Quote centrex

Hi Phil
Give it a couple of weeks for the slow boat from China to arrive and I will have PCB that could do what you want.
28 pin mite,ILI9341 interface, a position for the memory chip that started these pages as well as a number of other features.
I know it has smd but they are of a size that are reasonably easy to solder, most of it is through hole.

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centrex
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Posted: 29 June 2016 at 9:28am | IP Logged Quote centrex

Anyone looking for a 28 pin pic that will interface with the ILI9341 touch lcd module, has pads for the Windbond memory chip featured at the top of these pages that runs with Matherp's cfunctions for data logging, it will also interface with the sd card on the lcd again running Matherps cfunctions, provision for Pickit3, I2C and TassyJim and friends wrapper (mmflash)to allow programming of other Pic chips.
I have a few of these left over $2 per board plus postage.
PM me.




Edited by centrex on 01 July 2016 at 9:34pm


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CaptainBoing
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Posted: 05 October 2018 at 8:12pm | IP Logged Quote CaptainBoing

matherp wrote:
This one I'm pleased with

Since playing with the ESP8266 I've been interested in exploring how Serial Flash memory chips could be used for secure data logging on the Micromite as an alternative to SDcards or an external device like an Openlog.

Good morning Peter. you are well I trust.

What are the chances of revisitng this and placing the functions int he ARM Mite (and MMX) firmware? These are mega-useful chips confined to the '170 (and 470?) platform.

The ARM Mite definitely is a big controller but has only SDCard support.

just a thought

all the best

h
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