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Altera_Forum's avatar
Altera_Forum
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16 years ago

Mp3 decoder too slow on NiosII

Hi,all I'm now designing a mp3 player for DE2 board, which use libmad for mp3 decoding. But currently, the speed is too slow for real time playing. The core is NiosII fastest core,i cache=8kb, ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

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Thank you. I shall try -O3 or -O2 again.

I don't know how to create onchip RAM and move any function to it. I just know how to add the onchip RAM componet to the system using SOPC, what else should I do?

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Use this before functions going into onchip ram: 


void function(void) __attribute__((section(".onchip_mem")));
void function(void)
{
}
Of course onchip_mem has to match the name used in SOPC.

Bill