read_bit_from_ddc
ack = !read_bit_from_ddc(ddc_handle, SDA);
if (read_bit_from_ddc(ddc_handle, SDA))
if (read_bit_from_ddc(ddc_handle, SDA))
if (!read_bit_from_ddc(ddc_handle, SDA)) {
if (read_bit_from_ddc(ddc, SCL))