pwmmusic.c

蜂鸣器实验beepmusic(arm7平台)

#include  "config.h"


/*****歌曲曲谱***********/
const  uint32 MUSIC[]=
{
	_LA, _SO, _MI, _LA, _SO, _MI,
	_LA, _LA, _SO, _LA,
	_LA, _SO, _MI, _LA, _SO, _MI,
	_RE, _RE, _DO, _RE,
	_MI, _MI, _SO, _LA, _DO1, _LA, _SO,
	_MI, _MI, _SO, _DO,
	_MI, _MI, _MI, _MI, _MI,
	_1LA, _1LA, _1SO, _1LA,	
};

/*********歌曲节拍**************/
const  uint32  MUSIC_RHYTHM[]=
{
	_4, _8, _8, _4, _8, _8,
	_8, _4, _8, _2,
	_4, _8, _8, _4, _8, _8,
	_8, _4, _8, _2,
	_4, _8, _8, _8, _8, _8, _8,
	_8, _4, _8, _2,
	_4, _4, _4, _8, _8,
	_8, _4, _8, _2,
};


/****************************************************
*函数名称：DelayNS()
*函数功能：软件延时 
***************************************************/
void  DelayNS(uint8 dly)
{
	uint32 i;
	
	for(;dly>0;dly--)
		for(i=0;i<0x7FFFF;i++);
}


/**************************************************
*函数名称：main()
*函数功能：音乐输出试验
***************************************************/
int  main(void)
{
	uint8  i;
	
	PINSEL0 = 0x00008000;
	
	/******PWM初始化**********/

	PWMPR  = 0x00;
	PWMMCR = 0x02;
	PWMPCR = 0x0400;
	PWMMR0 = Fpclk/1000;
	PWMMR2 = PWMMR0/2;
	PWMLER = 0x05;
	PWMTCR = 0x02;
	PWMTCR = 0x09;

	while(1)
	{
		for(i=0;i<sizeof(MUSIC);i++)
			{
				PWMMR0 = Fpclk/MUSIC[i];
				PWMLER = 0x05;
				DelayNS(MUSIC_RHYTHM[i]);
			}
	}
	return 0;

}