Faster Routine

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Sigh. Lengthy reply wiped out by web page :frowning:

  • please provide example code that compiles and runs.
  • use separate code for each possible value with special actions. Right now, j=576 gets tested for 3 times, and executes 3 code segments.
  • check if "bit-banding" can speed up IO.
 if (((Tdata[767 - a] >> count) & 0x1)) {
        REG_PIOD_SODR = 0x1 << 8;
      } else {
        REG_PIOD_CODR = 0x1 << 8;
      }

Might become:

  PIOBANDEDBITS[8] = Tdata[767 - a] >> count;

with associated less masking and loading of bitshifted constants. I haven't actually ever used bit-banding, because I've never quite seen a case where it would obviously work better, but your code where you're trying to manipulate multiple bits in one Port might be such a case...