discr = calculer_delta( coeff_X2, coeff_X, coeff_cst ) ;
discr = calculer_delta( -1.5, 6.0, 39. ) ;
allumer_LED( i_led+1 ) ;
allumer_LED( 3 ) ;
octet_lu = lire_port_micro( ) ;
initialiser_micro( ) ;
afficher_message( "coucou !" ) ;
afficher_message( phrase ) ;