1 /* vi: set sw=4 ts=4: */
3 * beep implementation for busybox
5 * Copyright (C) 2009 Bernhard Reutner-Fischer
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
13 //config: select PLATFORM_LINUX
15 //config: The beep applets beeps in a given freq/Hz.
17 //config:config FEATURE_BEEP_FREQ
18 //config: int "default frequency"
19 //config: range 0 2147483647
20 //config: default 4000
21 //config: depends on BEEP
23 //config: Frequency for default beep.
25 //config:config FEATURE_BEEP_LENGTH_MS
26 //config: int "default length"
27 //config: range 0 2147483647
29 //config: depends on BEEP
31 //config: Length in ms for default beep.
33 //applet:IF_BEEP(APPLET(beep, BB_DIR_USR_BIN, BB_SUID_DROP))
35 //kbuild:lib-$(CONFIG_BEEP) += beep.o
37 //usage:#define beep_trivial_usage
38 //usage: "-f FREQ -l LEN -d DELAY -r COUNT -n"
39 //usage:#define beep_full_usage "\n\n"
40 //usage: " -f Frequency in Hz"
41 //usage: "\n -l Length in ms"
42 //usage: "\n -d Delay in ms"
43 //usage: "\n -r Repetitions"
44 //usage: "\n -n Start new tone"
49 #ifndef CLOCK_TICK_RATE
50 # define CLOCK_TICK_RATE 1193180
54 #ifndef CONFIG_FEATURE_BEEP_FREQ
57 # define FREQ (CONFIG_FEATURE_BEEP_FREQ)
59 #ifndef CONFIG_FEATURE_BEEP_LENGTH_MS
62 # define LENGTH (CONFIG_FEATURE_BEEP_LENGTH_MS)
65 #define REPETITIONS (1)
67 int beep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
68 int beep_main(int argc, char **argv)
70 int speaker = get_console_fd_or_die();
71 unsigned tickrate_div_freq = tickrate_div_freq; /* for compiler */
72 unsigned length = length;
73 unsigned delay = delay;
80 tickrate_div_freq = CLOCK_TICK_RATE / FREQ;
85 c = getopt(argc, argv, "f:l:d:r:n");
87 * pipe stdin to stdout, but also beep after each line (-s) or char (-c)
91 /* TODO: what "-f 0" should do? */
92 tickrate_div_freq = (unsigned)CLOCK_TICK_RATE / xatou(optarg);
95 length = xatou(optarg);
100 * specify a delay of N milliseconds between repetitions.
101 * -d specifies that this delay should only occur between beeps,
102 * that is, it should not occur after the last repetition.
103 * -D indicates that the delay should occur after every repetition
105 delay = xatou(optarg);
117 //bb_error_msg("rep[%d] freq=%d, length=%d, delay=%d", rep, freq, length, delay);
118 xioctl(speaker, KIOCSOUND, (void*)(uintptr_t)tickrate_div_freq);
119 usleep(1000 * length);
120 ioctl(speaker, KIOCSOUND, (void*)0);
122 usleep(1000 * delay);
126 if (ENABLE_FEATURE_CLEAN_UP)
131 * so, e.g. Beethoven's 9th symphony "Ode an die Freude" would be
140 #./beep -f$d -l200 -r2 -n -f$e -l100 -d 10 -n -f$c -l400 -f$g -l200
141 ./beep -f$e -l200 -r2 \
142 -n -d 100 -f$f -l200 \