Post by thread:Linux

Hello all! I am relatively new to Pics. I am thinking of undertaking a little (huge to a novice !:) project. I would like to make a Mp3 player for the car. I was wondering if I might pic the lists brains on a few subjects. Here are some of the areas I need help in: 1)Will LINUX run on a pic? If so , which one? ANd of course how! 2)Is there an easy way to interface with an IDE drive? Any one have a clue where I could find out how to do this? I have found lots of info on just what an IDE/ATA device is, just not how to use it! Any help on the technicalities would be great! 3)Does anyone know if there is an "easy"(pic related) way to decode and playback an mp3? I have looked in the archives but keep getting a search result of >600 hits! Again any help anyone has would be great. I am new but I like to think I learn quickly! :) Thanks, Allen

On Thu, Apr 27, 2000 at 01:07:40PM -0400, Allen Demers wrote: > 1)Will LINUX run on a pic? If so , which one? ANd of course how! > That is a very interesting question. First off, I have heard of Linux running on Palm Pilots, WinCE palmtops, and even older XT class PCs. However, a PIC has a lot less RAM available to it than any of the devices I just mentioned. -- -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Peter L. Berghold spam_OUTPeterTakeThisOuTBerghold.Net "Linux renders ships http://www.berghold.net NT renders ships useless...."

> 3)Does anyone know if there is an "easy"(pic related) way to decode and > playback an mp3? I have looked in the archives but keep getting a > search result of >600 hits! I think you're barking up the wrong tree here a bit. PICs are not meant to be number crunchers - and decoding an MP3 in real-time takes quite a lot of oomph. I'm doing a portable MP3 player of my own, which is controlled by a PIC 16F874. It's interfaced to a Micronas MAS3507D MP3 decoder (http://www.micronas.com I think), that does all the hard work and the PIC just keeps it in check, while supplying it with data. Hope this helps, Kieran

Check this out if you havent allready http://www2.empeg.com/main.html Soren K {Quote hidden}> -----Original Message----- > From: pic microcontroller discussion list > [.....PICLISTKILLspam@spam@MITVMA.MIT.EDU]On Behalf Of Kieran Miller > Sent: Thursday, April 27, 2000 8:15 PM > To: PICLISTKILLspamMITVMA.MIT.EDU > Subject: Re: Linux > > > > 3)Does anyone know if there is an "easy"(pic related) way to decode and > > playback an mp3? I have looked in the archives but keep getting a > > search result of >600 hits! > > I think you're barking up the wrong tree here a bit. PICs are not meant to > be number crunchers - and decoding an MP3 in real-time takes > quite a lot of > oomph. > > I'm doing a portable MP3 player of my own, which is controlled by a PIC > 16F874. It's interfaced to a Micronas MAS3507D MP3 decoder > (http://www.micronas.com I think), that does all the hard work and the PIC > just keeps it in check, while supplying it with data. > > Hope this helps, > > Kieran > >

On Thu, 27 Apr 2000, Allen Demers wrote: > 1)Will LINUX run on a pic? No. But a pic can run on Linux. If you happen to get Linux ported to a pic, say by this weekend, then you can simulate Linux while linux simulates a pic! But seriously, the current pic devices Microchip offers cannot support Linux. If you want to go the other way, then check out: http://www.dattalo.com/gnupic/gpsim.html Scott PS. This kind of reminds me of the Palm/Wince situation where someone has ported Poser (the Palm OS emulator) to Wince. Now except for the 1 week battery life and daily crashes, you can have the benefits of a Palm Pilot if you've unfortunately sunk your money into a wince thingy.

> 1)Will LINUX run on a pic? If so , which one? ANd of course how! Technically? Maybe, but it would run more slowly than molasses going uphill on a cold day, and require more external support chips/components than an early XT computer. Practically? No, Linux will not run on a PIC. The PIC was not designed for any processing past that of an 8-bit microCONTROLLER. Linux should not be run on anything less than a 16-bit microPROCESSOR. > 2)Is there an easy way to interface with an IDE drive? Any one have a > clue where I could find out how to do this? I have found lots of info > on just what an IDE/ATA device is, just not how to use it! Any help on > the technicalities would be great! There are lots of easy ways to interface a PIC with an IDE atapi device, but the code behind the interface is somewhat more difficult to wrestle. Look at http://www.mp3ar.com/ for info on this. > 3)Does anyone know if there is an "easy"(pic related) way to decode and > playback an mp3? I have looked in the archives but keep getting a > search result of >600 hits! The MP3 decoding, while not as intensive as the encoding, is still too much for a PIC to handle. One should not pursue decoding MP3s on anything less than a 16-bit microprocessor with a built in math coprocessor. > Again any help anyone has would be great. I am new but I like to think > I learn quickly! :) Like anything else, you could shoehorn some of these activities into a PIC, but its not likely that you'll achieve satisfactory results in doing so. -Adam

part 0 3534 bytes I am relatively new to Pics.  I am thinking of undertaking a little (huge to a novice !:) project.  I would like to make a Mp3 player for the car. I was wondering if I might pic the lists brains on a few subjects.  Here are some of the areas I need help in: 1)Will LINUX run on a pic?  If so , which one?  ANd of course how! </UL> Why would you want to?  You don't have to run llinux on something to make it decode MP3 streams.... <UL> 2)Is there an easy way to interface with an IDE drive?  Any one have a clue where I could find out how to do this?  I have found lots of info on just what an IDE/ATA device is, just not how to use it!  Any help on the technicalities would be great! </UL> Ongoing discussion on this, and even a competition with a notebook hard drive up for grabs from a piclist member if you write and publish the code. <UL> 3)Does anyone know if there is an "easy"(pic related) way to decode and playback an mp3?  I have looked in the archives but keep getting a search result of >600 hits! </UL> Use a dedicated hardware decoder such as the Micronas MAS3057D.  You just have to supply an MP3 encoded bitstream to this custom DSP chip, it does the rest. <UL> Again any help anyone has would be great.  I am new but I like to think I learn quickly!  :) Thanks, Allen </UL> Check out <A HREF="http://www.mp3ar.com" TARGET="_blank">http://www.mp3ar.com</A>  It has pretty much everything you need.  Be warned though, that this is not a trivial project suitable for an absolute beginner. Regards Mike Rigby-Jones </BODY> </HTML> </x-html>

part 0 1372 bytes Allen Demers wrote: > 1)Will LINUX run on a pic?  If so , which one?  ANd of course how! No, the Linux kernel requires an MMU and the pic does not have one. -- Robert Wuest, PE Sirius Engineering Company </UL> The 32 bit version of Linux does, but ELKS in being developed to run on 80286 down to 8086, and portable to other architectures without an MMU.  They've even managed to get linux (mostly) working on Psion's sixteen bit organisers such as the 3a and 3c etc.  I'm pretty darn sure you couldn't get linux to fit into any 16x PIC, but maybe the new 18C series??  Just another challenge for the mad linux porting community! Mike </BODY> </HTML> </x-html>

Actually, we were looking at copying^H^H^H^H^H^H this design based on Motorola coldfire: http://www.moretonbay.com (their 'Netel' product) It doesn't have MMU. Got one right here, on our lan, so you can log it but it's running linux. Look around their site for the code, which they are obliged to provide. As for running Linux on a PIC... HAHAHAHA!!! ROTFLMAO! hehehehahahahohoho.. Bahaa!! Muahhhahahaha! hehe haha HAHAHAHAAA! OH MY GOD! haha. HAHAHAHA! ahhhhhhhhhhhhhhhhhh, geez thats funny. Find a REAL micro. PIC = Peripheral Interface Controller? A PIC, IMHO, is a glorified CPLD. Linux? Hahaha. Hahaha thats funny. Hehehe heehee At 08:11 AM 4/28/00 +0100, you wrote: > > > {Original Message removed}

A PIC that can run 4MB of RAM can emulate a MMU. <G> Andy Robert Wuest <.....rwuestKILLspam.....WUEST.ORG> on 04/27/2000 04:02:47 PM Please respond to pic microcontroller discussion list <EraseMEPICLISTspam_OUTTakeThisOuTMITVMA.MIT.EDU> To: PICLISTspam_OUTMITVMA.MIT.EDU cc: (bcc: Andrew Kunz/TDI_NOTES) Subject: Re: Linux Allen Demers wrote: > 1)Will LINUX run on a pic? If so , which one? ANd of course how! No, the Linux kernel requires an MMU and the pic does not have one. -- Robert Wuest, PE Sirius Engineering Company

Actually, I think it would be very interesting (and maybe a little instructive) to recreate a 'modern' MPU architechture using a series of PICs. One or two for the core, a few for the FPU, one for buss control, interrupts, etc. -Adam Andrew Kunz wrote: {Quote hidden}> > A PIC that can run 4MB of RAM can emulate a MMU. > > <G> > > Andy > > Robert Wuest <@spam@rwuestKILLspamWUEST.ORG> on 04/27/2000 04:02:47 PM > > Please respond to pic microcontroller discussion list <KILLspamPICLISTKILLspamMITVMA.MIT.EDU> > > To: RemoveMEPICLISTTakeThisOuTMITVMA.MIT.EDU > > cc: (bcc: Andrew Kunz/TDI_NOTES) > > Subject: Re: Linux > > Allen Demers wrote: > > > 1)Will LINUX run on a pic? If so , which one? ANd of course how! > > No, the Linux kernel requires an MMU and the pic does not have one. > > -- > Robert Wuest, PE > Sirius Engineering Company

On Fri, 28 Apr 2000 17:51:31 +1000, David Lions <spamBeGonedlionsspamBeGoneMIVA.COM.AU> wrote: > As for running Linux on a PIC... > > HAHAHAHA!!! ROTFLMAO! hehehehahahahohoho.. > Bahaa!! Muahhhahahaha! Check out http://www.rtjcom.com -- that guy has a pretty interesting Java VM running on a 68HC11... I know that's not the same thing as getting Linux on a PIC, but I wonder if you could shoehorn his Java VM into one of the high-end PICs, if you interfaced it to external RAM... Food for thought :-) Later, Jon -------------------------------------------------------------- Jon Hylands TakeThisOuTJonEraseMEspam_OUThuv.com http://www.huv.com/jon Project: Micro Seeker (Micro Autonomous Underwater Vehicle) http://www.huv.com

Well, Scenix has a Java VM running on an SX52 - seriously! http://www.scenix.com/news/press/000131.htm They use external EEPROM or Flash to store the Java program (NOT the VM), as well as an external SRAM. Of course, the PIC would be about 10x slower doing this if you tried, because the 50MHz SX they're using gets 50MIPS, but a 20MHz PIC only gets 5 MIPS. Still, it would be really neat. -Randy Glenn RemoveMEPICxpertANTISPAMTakeThisOuTtechie.com (remove ANTISPAM) http://i.am/PICxpert "Is this a wretched demi-bee, half asleep upon my knee, Some freak, from a menagerie? NO! It's Eric, the half a bee!" - Monty Python =========== To unsubscribe, send a message containing the text "unsubscribe PICLIST" to LISTSERVEraseME.....MITVMA.MIT.EDU Any questions about the list? http://www.piclist.com/ {Original Message removed}