Dear all, hello to everyone,i am the new member of this yahoo group. i am a student from multimedia university in malaysia. currently i am working on a project...
hi guys ,how are you doing?? i have some problems with the lcd board and any help would be appreciated.. Actually i can't find any Pal code in the lcd board...
HI. I am going to build the PJRC mp3 player. I've browsed the site alot but still there is some confusion. I want to know that whether the microcontrller is...
No program code lives on the harddrive. It is only used for storing the mp3 data files. The program code lives on the board and can be updated via the serial ...
HI. I am confused about some points on the PCB of the PJRC mp3 player "rev C". In the given revC PCB layout on the website, there are some contacts which come...
Hi, I've bought the microcontroller 87C52 from the market. So, its not programmed. I want to know that , I have to program it with pm2_mp3.hex file. So whats...
... pm2_mp3.hex is the boot loader/monitor. Burn that into the 87C52's internal memory, then use the serial port on the board to upload mp3player.hex to the...
If you don’t have a way to flash the 87C52, then you have a problem. You will probably have to by the chip from PJRC or have someone program it for you. Len...
Hi, Thanks alot for helping me in my previous problems about the player. There is another question: I want to etch the PCB myself but when I took a good look...
Hello All, I am new to this group.I have some question related to LCD.I have to display a BMP/JPEG image file on the LCD.The driver is already there.How to go...
You might want to ask this question on the developer group. Im not sure the name of it but it is also a yahoo group and you can find that info on the PJRC ...
... Are you asking about the PJRC LCD display? I do not think the firmware on the LCD offered via PJRC would support writing out a BMP data to display. The...
Hi, I had bought unassembed MP3 kit from the PJRC store. I am encountering the following problem: I am not using LCD screen and SIMM and using 3.5 inch hard...
You would need a complete LCD controller circuit. This would have to translate the ASCII information from the player and format it for the screen. The touch...
hello friends, I am in a fix for I cannont get the LCD JW-002. Can any one help me out with a design of lcd to be used with a general lcd board(simple lcd...
... It definitely does, as the file-scanning part of the boot prints the name of each folder that it enters, and possibly some other stuff. The other problem...
Of course, but it's not that hard to fire up the mp3 player after putting in some new track and going to the setup menu and selecting regen index file or...
Team, My 100GB drive is now full so I need to get a larger one. But just out of curiosity what is the factor with the PJRC board that limits it to 128GB? Has...
... out of ... 128GB? ... According to the FAQ (http://www.pjrc.com/tech/mp3/faq.html) the limit is due to the 28bit LBA limit. I am still kicking it on a...
OK, I did some reading up on Logical Block Addressing (LBA) but I still don't see why there is a 128GB limitation. What I read made no such reference to size...
... Using LBA mode, the hard drive is divided into 512 byte sectors. The sectors are addressed using a 28-bit address giving a maximum addressable space of 512...
... wikipedia also has some iformation on the limits of LBA: http://en.wikipedia.org/wiki/Logical_block_addressing It looks like newer harddrives are accessed...
... I altered my local code to output dots instead of directory names during the indexing of the harddrive. It took 27 seconds to index my 10G harddrive...
Laine and Keith, Thanks for the responses and the education. I wonder if I could get a drive larger than 128GB but have a 128GB FAT partition. Would the...
I imagine if you could possibly refer to the secondary partition(s) as folders within your primary. I highly doubt that the player would recognize a cop out...
... I believe (haven't checked the code, so not 100% sure) that the partition table code only uses the LBA fields in the partition table entry, not the CHS...
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