DDC_SCL_OUT
reg |= DDC_SCL_OUT;
reg &= ~DDC_SCL_OUT;
reg |= DDC_SCL_OUT;
reg &= ~DDC_SCL_OUT;
r |= DDC_SCL_OUT;
r &= ~DDC_SCL_OUT;
#define DDC_MASK (DDC_SCL_OUT | DDC_SDA_OUT)
reg |= DDC_SCL_OUT;
reg &= ~DDC_SCL_OUT;