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Forum Index : Microcontroller and PC projects : 8 bit vs 32 bit

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vk4tec

Senior Member

Joined: 24/03/2012
Location: Australia
Posts: 239
Posted: 11:23pm 01 Jun 2013
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Hello

What is tha advantage of having a 32 bit MCU over an 8 ?

Larger numbers ?

Four times the instructions ?

Andrew
Andrew Rich VK4TEC
www.tech-software.net
 
MOBI
Guru

Joined: 02/12/2012
Location: Australia
Posts: 819
Posted: 12:34am 02 Jun 2013
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  Quote  What is the advantage of having a 32 bit MCU over an 8 ?


A totally different engine. The 8 bit PICs use "standard" PIC architecture whereas the PIC32 uses a MIPS processor within a PIC framework.

I downloaded the instruction set to have a go at assembly in the pic32 and then decided that I wouldn't. When I do, it will be using a C compiler. Not that it is impossible but there are limits to one's ambitions.
David M.
 
JohnS
Guru

Joined: 18/11/2011
Location: United Kingdom
Posts: 3998
Posted: 03:37am 02 Jun 2013
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Larger memories, faster CPUs, good DMA, far better ADC, etc. Look what MMBasic does, you couldn't do that on the PIC16Fs mentioned above!

John
 
Bryan1

Guru

Joined: 22/02/2006
Location: Australia
Posts: 1395
Posted: 10:19pm 02 Jun 2013
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Yea I finally started reading that pic32 pdf and downloaded mplabX and had a go writing my first 'C' file to simulate which ran nicely. I do have a chip kit here with the 100 pin 795f512 chip so yesterday went up to my shed and finally found where I left my pikit3. Decided well time to make a breakout board to sit ontop and use my cnc to mill my first pcb but now I got the listeriod bug I instead spent a day working on my 5 cyl radial and 2 hous of hacksawing later had the 5 hollow bar blanks to machine for the cyclinders so that took up one my rare free days.

So tonights job is looking at the chipkit pdf and designing up a breakout board to fit a SDcard and VGA socket among other things. With so many holes to drill it will be a good test for my cnc as the first trial of a gerber on plywood machined up nicely as the first test.

Regards Bryan
 
Grogster

Admin Group

Joined: 31/12/2012
Location: New Zealand
Posts: 9492
Posted: 04:43pm 04 Jun 2013
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  MOBI said  I downloaded the instruction set to have a go at assembly in the pic32 and then decided that I wouldn't.


HAHAHA!


I did pretty much the same thing a while back, and thought that I'd probably be 90 by the time I managed to do useful things in MIPS!!!!

Edited by Grogster 2013-06-06
Smoke makes things work. When the smoke gets out, it stops!
 
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