DAC_LEFT
*DAC_LEFT = 128;
*DAC_LEFT=sval;
*DAC_LEFT=*DAC_RIGHT=127;
*DAC_LEFT=*q40_pp++;
*DAC_LEFT=*q40_pp;
*DAC_LEFT=*DAC_RIGHT=127;
dac = DAC_LEFT;
if (!(data & (DAC_LEFT | DAC_RIGHT)))