eng_dac_mode
head2_mode = (dac_mode) eng_dac_mode;
head1_mode = (dac_mode) eng_dac_mode;
status_t eng_dac_mode(int,float);
head2_mode = (dac_mode) eng_dac_mode;
head1_mode = (dac_mode) eng_dac_mode;
status_t eng_dac_mode(int,float);