view target-utils/buzplayer/melplay.c @ 658:0da2cf5a999c

target-utils: libload eliminated
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 03 Mar 2020 06:06:17 +0000
parents 8a200d65c6a0
children 158dd05fb9f9
line wrap: on
line source

#include "types.h"
#include "melody.h"

extern struct melentry *melody_buf_start, *melody_buf_tailptr;

#define	ARMIO_LOAD_TIM	(*(volatile u16 *) 0xFFFE4808)
#define	BUZZ_LIGHT_REG	(*(volatile u16 *) 0xFFFE480E)

void
melody_play()
{
	struct melentry *p;
	int count;

	wait_for_tdma_frame();
	for (p = melody_buf_start; p < melody_buf_tailptr; p++) {
		if (p->tone) {
			ARMIO_LOAD_TIM = p->tone;
			BUZZ_LIGHT_REG = 1;
		} else
			BUZZ_LIGHT_REG = 0;
		for (count = p->dur; count; count--)
			wait_for_tdma_frame();
		BUZZ_LIGHT_REG = 0;
	}
}