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FreeRTOS, LPC21xx, MP3 Player and Ethernet

FreeRTOS, LPC21xx, MP3 Player and Ethernet

2005-11-01 by rtstofer

OK, I have a working MP3 player on the LPC2106 with CF and a VLSI 
VS1002 CODEC.  I know, it is the 3 millionth design and I'll concede 
that it is not noteworthy.

Now, I want to add Ethernet and probably use the UDP protocol to 
select the file to play.

There are a lot of things going on (like switches and LEDs connected 
to an SPI Bus Expander) and it seems like the time to introduce 
FreeRTOS.

Does anyone have input on the responsiveness of FreeRTOS with 
regards to keeping the FIFO filled on the CODEC?  There is a 16k 
byte buffer and if a 6 MB file needs to be transferred in 6 minutes, 
I probably need to average 1 MB per minute or 16 KB per second.  
Figure double that and I also need to be able to get that data from 
the CF in the same time frame.  DMA doesn't exist and, to date, 
nothing is interrupt driven.

This device is primarily for special effects, not a poor man's iPod.

Thanks!

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