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Altera_Forum
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8 years ago

Bare metal application on Cyclone V too slow - DE10-Nano

Hello all, I'm trying to develop some bare metal application in C using DS-5 with arm-altera-eabi-gcc with the DE10-Nano (ARM Cortex A9) but after some time developing the code I realized that ...
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Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

First of all I'll make sure sdram access is cached.

Try to read bytes from sdram and extract the bit afterwards with something like this: 


for(test = 0; test < 307200; test+= 8) {
   pixel8 = get8PixelLevels(test);
   for (bit = 0; bit<8; bit++) {
       test2 = pixel8 & 1;
       pixel8 >>= 1;
      }
}

If this way you experience a great improvement in speed, then the problem is with sdram access.