PWM_CR
prescale = ((HREAD4(sc, PWM_CR) >> PWM_CR_PRESCALER_SHIFT) &
if (HREAD4(sc, PWM_CR) & PWM_CR_EN)
HCLR4(sc, PWM_CR, PWM_CR_EN);
HWRITE4(sc, PWM_CR, PWM_CR_SWR);
if ((HREAD4(sc, PWM_CR) & PWM_CR_SWR) == 0)
HWRITE4(sc, PWM_CR, PWM_CR_PRESCALER(prescale) |