ugBASIC 1.18
An isomorphic BASIC language compiler for retrocomputers
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play.c
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1/*****************************************************************************
2 * ugBASIC - an isomorphic BASIC language compiler for retrocomputers *
3 *****************************************************************************
4 * Copyright 2021-2026 Marco Spedaletti (asimov@mclink.it)
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
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10 * http://www.apache.org/licenses/LICENSE-2.0
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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15 * See the License for the specific language governing permissions and
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17 *----------------------------------------------------------------------------
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22 * http://www.apache.org/licenses/LICENSE-2.0
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24 * Se non richiesto dalla legislazione vigente o concordato per iscritto,
25 * il software distribuito nei termini della Licenza è distribuito
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30
31/****************************************************************************
32 * INCLUDE SECTION
33 ****************************************************************************/
34
35#include "../../ugbc.h"
36
37/****************************************************************************
38 * CODE SECTION
39 ****************************************************************************/
40
52/* <usermanual>
53@keyword PLAY (instruction)
54
55@english
56This command allows you to play a certain note, for a certain time and on certain
57channels. The command has a number of variations. First, you can omit the channel.
58In this case, the sound will be played on all channels (or on those enabled by the
59''VOICES''/''CHANNELS'' command). Then you can omit the duration, in which case the sound will
60continue to play while the next instruction is executed. Duration is expressed
61in milliseconds.
62
63@italian
64Questo comando permette di suonare una certa nota, per un certo tempo e su certi
65canali. Il comando ha una serie di varianti. In primo luogo, è possibile omettere il
66canale. In tal caso, il suono sarà suonato su tutti i canali (oppure su quelli abilitati
67dal comando ''VOICES''/''CHANNELS''). Poi è possibile omettere la durata, e in tal caso il suono
68continuerà ad essere suonato mentre viene eseguita l'istruzione successiva. La durata è
69espressa in millisecondi.
70
71@syntax PLAY #note[, #duration] [ON #channels]
72
73@example PLAY #32
74@example PLAY #24, #250
75@example PLAY #60, #1250 ON #%001
76
77@target c128
78</usermanual> */
79
80void play( Environment * _environment, int _note, int _delay, int _channels ) {
81
82 sid_start( _environment, _channels );
83 sid_set_note( _environment, _channels, _note );
84 if ( _delay ) {
85 wait_milliseconds( _environment, _delay );
86 }
87
88}
89
101void play_vars( Environment * _environment, char * _note, char * _delay, char * _channels ) {
102
103 Variable * note = variable_retrieve_or_define( _environment, _note, VT_BYTE, 42 );
104 if ( _channels ) {
105 Variable * channels = variable_retrieve_or_define( _environment, _channels, VT_WORD, 0x07 );
106 sid_start_var( _environment, channels->realName );
107 sid_set_note_vars( _environment, channels->realName, note->realName );
108 } else {
109 sid_start_var( _environment, NULL );
110 sid_set_note_vars( _environment, NULL, note->realName );
111 }
112 if ( _delay ) {
113 wait_milliseconds_var( _environment, _delay );
114 }
115
116}
Variable * variable_retrieve_or_define(Environment *_environment, char *_name, VariableType _type, int _value)
void play(Environment *_environment, int _note, int _delay, int _channels)
Emit ASM code for PLAY ....
Definition play.c:57
void play_vars(Environment *_environment, char *_note, char *_delay, char *_channels)
Emit ASM code for PLAY ....
Definition play.c:78
void sid_set_note(Environment *_environment, int _channels, int _note)
Definition sid.c:491
void sid_start_var(Environment *_environment, char *_channels)
Definition sid.c:506
void sid_start(Environment *_environment, int _channels)
Definition sid.c:65
void sid_set_note_vars(Environment *_environment, char *_channels, char *_note)
Definition sid.c:781
char * realName
Definition ugbc.h:982
struct _Variable Variable
Structure of a single variable.
struct _Environment Environment
Structure of compilation environment.
@ VT_WORD
Definition ugbc.h:455
@ VT_BYTE
Definition ugbc.h:450
void wait_milliseconds(Environment *_environment, int _timing)
Emit ASM code for WAIT # [integer] MS.
void wait_milliseconds_var(Environment *_environment, char *_timing)
Emit ASM code for WAIT [expression] MILLISECONDS.