music.c

51单片机的键盘扫描程序,当有键盘输入是,将在LED上显示,且蜂鸣器将发出相应的响声.

//music.c
#include"general.h"
#include"sys12M.h"
#include"music.h"
sbit vol  = P3^5;
WORD smicor;
//**********************************
WORD code music_code[3][8] = {
								{0,1500,1500,1500,1500,1500,1500,1500},
								{0,1137,1013,902,852,759,676,602},
								{0,500,500,500,500,500,500,500}
					          };
//***********************************
void music_init(void)
{
	TMOD = TMOD & 0x0F;
	TMOD = TMOD | 0x10;
	EA = 1;
	ET1 = 1;
}
//**************************
void micor_play(MIC micor)
{
	BYTE i,j;
	WORD delayor;
	i = micor.step;
	j = micor.actor;
	smicor = music_code[i][j]; 
	if(smicor) set_timer(smicor,1);
	else vol = 1;
	i = micor.tmic;
	delayor = (WORD)(i*PAT);
	delay(delayor);
	TR1 = 0;
}
//***********************************
void on_timer1(void) interrupt 3
{
	TR1 = 0;
	vol = !vol;
	set_timer(smicor,1);
}
//***********************************
void music_play(MIC *pmic,BYTE nmic)
{
	BYTE i;
	for(i=0;i<nmic;i++) micor_play(pmic[i]);
}