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Altera_Forum's avatar
Altera_Forum
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10 years ago

Problem: DE1-SoC Audio Codec

Hello everyone. I'll start by saying that my english sure it's not the best, i apologise for that; but i'll try anyway to be as clear as possibile. I'm trying to realise a project on my DE1-SoC...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

That's exactly the same code as I used and it worked for me. I presume you're setting virtual_base correctly.... ?

if( ( fd = open( "/dev/mem", ( O_RDWR | O_SYNC ) ) ) == -1 ) {

printf( "ERROR: could not open \"/dev/mem\"...\n" );

return( 1 );

}

virtual_base = mmap( NULL, HW_REGS_SPAN, ( PROT_READ | PROT_WRITE ), MAP_SHARED, fd, HW_REGS_BASE );

if( virtual_base == MAP_FAILED ) {

printf( "ERROR: mmap() failed...\n" );

close( fd );

return( 1 );

}