External data storage for PIC18F4550?

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SilverWingz

New Member

• Dec 5, 2012

• #1

Been fiddling with pic's for a couple of months now and getting just a little bit comfortable.

I was wondering if there was some easy way to rig up some external memory to the pic so i can store and retrieve acquired data?

was hoping to get my hands dirty with a data acquisition project,but the provided 256bytes just doesn't cut it!

I was also looking at older posts where many strongly stated that it was a tough job?

Any suggestions?Any suggestion as to where i should start looking?

 

Ian Rogers

User Extraordinaire

Forum Supporter

Most Helpful Member

• Dec 5, 2012

• #2

I use I2C memory... You can attach up to 2mbit ( 256K )

I only need 32k so I use a 24LC256 device.

 

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SilverWingz

New Member

• Dec 5, 2012

• #3

havnt looked in2 i2c yet,but i'm going to right away,thanks!
will repost once i start running into walls

thanks again!

 

3v0

Coop Build Coordinator

Forum Supporter

• Dec 5, 2012

• #4

How much memory do you need? The more recent PICs have large amounts of flash memory that can be written by the user program.

 

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SilverWingz

New Member

• Dec 5, 2012

• #5

and um...just wondering...is there any way to do the same using micro sd cards?would they be really tough to interface?

i'm hardly half a dozen steps past the beginner stage,hehe

 

Ian Rogers

User Extraordinaire

Forum Supporter

Most Helpful Member

• Dec 5, 2012

• #6

@3V0..... Yep! that works aswell.... But I need that space...

The colour Maximite Has "Drive A" that is in program space....

 

Ian Rogers

User Extraordinaire

Forum Supporter

Most Helpful Member

• Dec 5, 2012

• #7

@SilverWingz... There is a demo for SD in the microchip SDK.... Also there is Petit FAT File System

It will work on your chip...

 

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SilverWingz

New Member

• Dec 5, 2012

• #8

as for why i need it...intending to build a data acquisition system for a solar charging system,voltage,current and ambient temp(it affects the panels efficiency).
probably take samples every 5 minutes,12 hours a day and im hoping not to have to go and take out the data in any time less that a month.

if i can get an sd card interfaced,that'd leave me happy for a long while.

 

Ian Rogers

User Extraordinaire

Forum Supporter

Most Helpful Member

• Dec 5, 2012

• #9

If you don't need a file system ( just storage ) .. This bloke has a sound recorder using SD https://www.moty22.co.uk/index.php

 

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SilverWingz

New Member

• Dec 5, 2012

• #10

yeah,data storage and retrieval is all i need

that last post looks promising!

 

Last edited: Dec 5, 2012