Initial public release

1 files changed, 49 insertions, 0 deletions

diff --git a/sdcc/beeper.h b/sdcc/beeper.h
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+++ b/sdcc/beeper.h
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+// Beeper engine
+// Copyright (C) 2021 by Juan J. Martinez <jjm@usebox.net>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+//
+#ifndef _BEEPER_H
+#define _BEEPER_H
+
+#include <stdint.h>
+
+struct beeper_sfx {
+    uint8_t type;
+    uint8_t frames;
+    uint8_t freq;
+    uint8_t slide;
+    uint8_t next;
+};
+
+// to init the beeper engine, provide a pointer to the effect table
+void beeper_init(const struct beeper_sfx *efx_table) __z88dk_fastcall;
+
+// to queue a new effect
+// efx_no is...
+//
+//    0: no effect (stops sound)
+//    1: index 0 of the effect table
+//    2: ...
+//
+void beeper_queue(uint8_t efx_no) __z88dk_fastcall;
+
+// to be called in the INT handler; call beeper_init first!
+void beeper_play();
+#endif