DA_CTL
val = I2S_READ(sc, DA_CTL);
I2S_WRITE(sc, DA_CTL, val);
val = I2S_READ(sc, DA_CTL);
I2S_WRITE(sc, DA_CTL, val);
I2S_WRITE(sc, DA_CTL, val);
ctl = I2S_READ(sc, DA_CTL);
I2S_WRITE(sc, DA_CTL, ctl);
val = I2S_READ(sc, DA_CTL);
I2S_WRITE(sc, DA_CTL, val | DA_CTL_TXEN);
val = I2S_READ(sc, DA_CTL);
I2S_WRITE(sc, DA_CTL, val | DA_CTL_RXEN);
val = I2S_READ(sc, DA_CTL);
I2S_WRITE(sc, DA_CTL, val & ~DA_CTL_TXEN);
val = I2S_READ(sc, DA_CTL);
I2S_WRITE(sc, DA_CTL, val & ~DA_CTL_RXEN);