81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
/**
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* @brief piano - Interactively make beeping noises
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*
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* @copyright
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2014-2018 K. Lange
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <termios.h>
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int spkr = 0;
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struct spkr {
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int length;
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int frequency;
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};
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void note(int length, int frequency) {
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struct spkr s = {
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.length = length,
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.frequency = frequency,
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};
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write(spkr, &s, sizeof(s));
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}
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struct termios old;
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void set_unbuffered() {
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tcgetattr(fileno(stdin), &old);
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struct termios new = old;
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new.c_lflag &= (~ICANON & ~ECHO);
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tcsetattr(fileno(stdin), TCSAFLUSH, &new);
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}
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int main(int argc, char * argv[]) {
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spkr = open("/dev/spkr", O_WRONLY);
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if (spkr == -1) {
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fprintf(stderr, "%s: could not open speaker\n", argv[0]);
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return 1;
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}
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set_unbuffered();
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char c;
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while ((c = fgetc(stdin))) {
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switch (c) {
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case 'q': note(0, 1000); return 0;
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case 'z': note(0, 1000); return 0;
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case ' ': note(0, 1000); break;
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case 'a': note(-1, 1308); break;
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case 'w': note(-1, 1386); break;
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case 's': note(-1, 1468); break;
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case 'e': note(-1, 1556); break;
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case 'd': note(-1, 1648); break;
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case 'f': note(-1, 1746); break;
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case 't': note(-1, 1850); break;
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case 'g': note(-1, 1960); break;
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case 'y': note(-1, 2077); break;
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case 'h': note(-1, 2200); break;
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case 'u': note(-1, 2331); break;
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case 'j': note(-1, 2469); break;
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case 'k': note(-1, 2616); break;
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case 'o': note(-1, 2772); break;
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case 'l': note(-1, 2937); break;
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case 'p': note(-1, 3111); break;
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case ';': note(-1, 3296); break;
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case '\'': note(-1, 3492);break;
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}
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}
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return 0;
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}
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