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pjrcmp3dev · PJRC MP3 Player Developers

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Group Information

  • Members: 200
  • Category: Electrical
  • Founded: Jul 12, 2001
  • Language: English
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Does anyone remember if ATAPI support has ever made its way into the firmware? See, I have this idea rolling around in my head... I have access to at least 2...
4 Jan 29, 2004
3:00 pm

colonwq
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Hello. Sorry to bother everyone but I bought one of PJRC's mp3 players with the backlite 24x8 screen and all of the wiring. My plans were to have this in my...
1 Jan 26, 2004
7:25 pm

wildbobcat37
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Hey Guys, I have added a new option to the directory listing code. There is a parameter under "Testing DANGER" that will change the directory listing screen...
1 Jan 21, 2004
8:22 pm

colonwq
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Hi all....again- I just downloaded the newest versions of the firmware, modified it, saved it and then tried to compile it using 'make'. However, when I ...
2 Jan 15, 2004
2:23 pm

colonwq
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Hi all- My board is fast flash compatible. When I compile the source, however, it doesn't create a .fdl file to use. Is there a different executable to use...
2 Jan 14, 2004
1:24 am

Paul Stoffregen
pauljs97140
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Hi all- I downloaded what appeared to be the latest version of the firmware from the site, but it was date back in 2002. How can I get the lastest version of...
2 Jan 13, 2004
11:58 pm

David Gillham
dmgillha
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Hi all, I have been playing around with the player's software and is it correct the when the player starts up, it searches for every mp3 and loads them into...
4 Jan 13, 2004
9:03 pm

colonwq
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Hey, I have just joined the group, because I was playing around with the idea of building a portable mp3 player for my car. I was actually thinking mini-atx...
7 Jan 13, 2004
6:40 pm

colonwq
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Hi all- I have version 0.6.10 and I've been searching hard through the code to find out how to change what's displayed while the songs are playing. I found...
2 Jan 13, 2004
11:37 am

Paul Stoffregen
pauljs97140
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Hi, I don't know about the CF option, but the USB add-on is used by a couple of people. It's documented on the PRJC.com site. Using it in the car is also my...
1 Jan 13, 2004
8:49 am

rudig@...
rudi_groenes...
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I was doing some thinking about precaching small bits of the next several songs, and how it could integrate with the unlimited file size playback, and some...
3 Jan 9, 2004
11:54 pm

Bernie Pallek
bmatthiasp
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After several long months of doing essentially nothing on this project, I'm finally returning! All of the big projects I took on last year are now finished,...
5 Jan 7, 2004
2:11 am

Paul Stoffregen
pauljs97140
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So I finally got my player, and it's working great. What comes to mind first, of course? The long lead-time between songs. I was wondering if any work has...
6 Dec 21, 2003
4:08 pm

colonwq
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I'm looking at the code for M3U support, and it looks like the m3u processing code is commented out in 0.6.10. All it seems to do is to print out the m3u...
9 Dec 16, 2003
4:50 pm

james@...
skwirl42
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I've been having some trouble building sdcc, since I'm running on Mac OS X. It wouldn't build sdcpp. So I took a recent source snapshot from the sdcc site,...
1 Dec 16, 2003
4:25 am

skwirl42
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Does the MP3 player currently support WAV files? If not, is it possible to add this support via the firmware...or is this a hardware issue? Thanks!...
2 Dec 10, 2003
8:31 pm

colonwq
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Hi, The player uses hardware decoding for decoding the mp3. Adding support for wav is hard to do. And was also not the intention of the player. Implementing it...
1 Dec 10, 2003
6:51 am

rudig@...
rudi_groenes...
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In treedir.c is a function called "unsigned char treedir_user_action(event_t)". It seems to be allocated as DSEG twice in the treedir.lst and main.map. Is this...
1 Dec 5, 2003
9:01 pm

colonwq
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I got an 8*24 jw002 LCD from e-bay, and it has the 19,200 baud code in it. I read around on the PJRC website and saw that there is an option to comment out the...
1 Nov 29, 2003
7:01 pm

Travis
frodus17
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I just finished testing my code with my hardware display and had to change only a couple of small scrolling issues. I have just commited my code to CVS and the...
3 Nov 25, 2003
9:10 pm

colonwq
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Hey guys, Let me know what you think of my changes described below. Project: I have been working on the treedir screen and its overall operation for the past...
3 Nov 14, 2003
1:21 pm

colonwq
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Hi All, In some previous post, we were talking about building the memory image of mp3 directories on a PC, avoiding the player to do it. This will reduce...
12 Nov 13, 2003
4:15 pm

Bernie Pallek
bmatthiasp
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I have seen in a few places in the code where char's are used for yes/no flags. Will switching the unneeded char's to bit's save code space in the player? Will...
3 Nov 3, 2003
3:30 pm

colonwq
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If some of you have troubles with the perl HEX2FDL utility, try this : binmode(STDOUT); instead of binmode STDOUT, ":bytes"; at the very first lines of the...
1 Oct 30, 2003
10:21 pm

ftouanen
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Hey guys I would like to know if there is a source for the firmware for the Hyundai HG12603-a LCD module. I have several I purchased from EBAY. The person I...
1 Oct 20, 2003
1:57 pm

bdrmachine
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Hey Guys! I am doing some dev for mp3 players on a different platform and environment. However, the discussions on this group could still be of some help to me...
2 Oct 17, 2003
6:16 am

Rudi Groenescheij
rudi_groenes...
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Hey guys, I am running into a problem with some C and asm code for the player. I am working on changing dirlist.c:char test_file_extension(void) to ...
2 Oct 16, 2003
1:12 pm

colonwq
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Regarding the mp3 player project: http://www.pjrc.com/tech/mp3/ ... This would be best to discuss in the yahoo mp3 player developers group. That way, other...
1 Oct 3, 2003
1:46 pm

Paul Stoffregen
pauljs97140
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First of all, hi to everyone on the list. Been browsing on and off for a while, and found the wealth of information you all exchange very useful for learning. ...
3 Sep 21, 2003
6:20 pm

Ed Schlunder
zilym
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I just put the finishing touches on my rewrite of the treedir file-browsing code and am about to commit it to CVS after this e-mail. New things: -The new code...
4 Sep 4, 2003
12:27 am

Laine Walker-Avina
nerdguy0
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