BT459_CMAP
dac_write(par, BT459_CMAP, red);
dac_write(par, BT459_CMAP, green);
dac_write(par, BT459_CMAP, blue);
dac_write(par, BT459_CMAP, red);
dac_write(par, BT459_CMAP, green);
dac_write(par, BT459_CMAP, blue);