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music.c
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#include <msp430g2553.h>
#include <controller.h>
typedef short bool;
#define false 0
#define true 1
void Init_Ports_music(void)
{
set_output(P2,0x2); //将P2.1设置为输出
}
//****************************************************************
enum note{do_=262,re=294,mi=330,fa=349,so=392,la=440,ti=494,
$do=523,$re=587,$mi=659,$fa=698,$so=784,$la=880,$ti=988,
$$do = 1047, $$re = 1174, $$mi = 1318};
const unsigned int music_data2[][2] = //乐谱
{
{$mi,800},{$re,800},{$do,800},{ti,800},{la,800},{so,800},{la,800},{ti,800},
{$do,200},{ti,200},{$do,200},{mi,200},
{so,400},{la,200},{ti,200},
{$do,200},{ti,200},{$do,200},{mi,200},
{$so,200},{$mi,200},{$so,200},{$la,200},
{$fa,200},{$mi,200},{$re,200},{$fa,200},
{$mi,200},{$re,200},{$do,200},{ti,200},//
{la,200},{so,200},{fa,200},{$do,200},
{ti,800},//-*
{$do,200},{ti,200},{$do,200},{mi,200},
{so,400},{la,200},{ti,200},
{$do,200},{ti,200},{$do,200},{mi,200},
{$so,200},{$mi,200},{$so,200},{$la,200},
{$fa,200},{$mi,200},{$re,200},{$fa,200},
{$mi,200},{$re,200},{$do,200},{ti,200},//
{la,200},{so,200},{fa,200},{$do,200},
{ti,200},{so,200},{$do,200},{ti,200},
//auto-gen
{$so,200},{$mi,100},{$fa,100},{$so,200},{$mi,100},{$fa,100},
{$so,100},{so,100},{la,100},{ti,100},{$do,100},{$re,100},{$mi,100},{$fa,100},
{$mi,200},{$do,100},{$re,100},{$mi,200},{mi,100},{fa,100},
{so,100},{la,100},{so,100},{mi,100},{so,100},{$do,100},{ti,100},{$do,100},
{la,200},{$do,100},{ti,100},{la,200},{so,100},{fa,100},
{so,100},{fa,100},{mi,100},{fa,100},{so,100},{la,100},{ti,100},{$do,100},
{la,200},{$do,100},{ti,100},{$do,200},{ti,100},{la,100},
{ti,100},{la,100},{ti,100},{$do,100},{$re,100},{$mi,100},{$fa,100},{$so,100},
{$so,200},{$mi,100},{$fa,100},{$so,200},{$mi,100},{$fa,100},
{$so,100},{so,100},{la,100},{ti,100},{$do,100},{$re,100},{$mi,100},{$fa,100},
{$mi,200},{$do,100},{$re,100},{$mi,200},{mi,100},{fa,100},
{so,100},{la,100},{so,100},{mi,100},{so,100},{$do,100},{ti,100},{$do,100},
{la,200},{$do,100},{ti,100},{la,200},{so,100},{fa,100},
{so,100},{fa,100},{mi,100},{fa,100},{so,100},{la,100},{ti,100},{$do,100},
{la,200},{$do,100},{ti,100},{$do,200},{ti,100},{la,100},
{ti,100},{la,100},{ti,100},{$do,100},{$re,100},{$mi,100},{$fa,100},{$so,100},
{$mi,200},{$do,100},{$re,100},{$mi,200},{$re,100},{$do,100},
{$re,100},{ti,100},{$do,100},{$re,100},{$mi,100},{$re,100},{$do,100},{ti,100},
{$do,200},{la,100},{ti,100},{$do,200},{mi,100},{fa,100},
{so,100},{la,100},{so,100},{fa,100},{so,100},{$do,100},{ti,100},{$do,100},
{la,200},{$do,100},{ti,100},{la,200},{so,100},{fa,100},
{so,100},{fa,100},{mi,100},{fa,100},{so,100},{la,100},{ti,100},{$do,100},
{la,200},{$do,100},{ti,100},{$do,200},{ti,100},{la,100},
{ti,100},{$do,100},{$re,100},{$do,100},{ti,100},{$do,100},{la,100},{ti,100},
{$do,800},{so,800},{la,800},{mi,800},{fa,800},{$do,800},{la,800},{ti,800},{$do,1600},
//
{0,0} //卡农
};
const unsigned int music_data1[][2] = //乐谱：荷塘月色。
{
{523,600},{784,200},{523,200},{784,200},{523,200},{587,200},{659,1600},
{523,600},{784,200},{523,200},{784,200},{523,200},{587,200},{587,1600},
{523,600},{784,200},{523,200},{784,200},{587,200},{523,200},
{440,1000},{392,200},{523,200},{587,200},
{523,600},{784,200},{523,200},{784,200},{523,200},{440,200},{523,1600},
{523,200},{523,400},{440,200},{392,400},{440,400},
{523,600},{784,200},{523,200},{784,200},{523,200},{587,200},{659,1600},
{523,400},{523,200},{587,200},{659,800},
{587,200},{587,400},{523,200},{587,400},{587,200},{784,200},
{784,200},{659,200},{659,200},{587,200},{659,800},
{523,200},{523,400},{440,200},{392,400},{784,400},
{659,200},{587,200},{659,200},{587,200},{523,800},
{587,200},{587,400},{523,200},{587,200},{587,400},{659,200},
{587,200},{523,200},{440,200},{587,200},{523,800},
{523,200},{523,400},{440,200},{392,400},{440,400},
{523,200},{523,400},{587,200},{659,800},
{587,200},{587,400},{523,200},{587,400},{587,200},{784,200},
{784,200},{659,200},{659,200},{587,200},{659,800},
{523,200},{523,200},{523,200},{440,200},{392,400},{784,400},
{659,200},{587,200},{659,200},{587,200},{523,800},
{587,200},{587,400},{523,200},{587,200},{587,400},{659,200},
{587,200},{523,200},{440,200},{587,200},{523,800},
{659,200},{784,400},{784,200},{784,400},{784,400},
{880,200},{784,200},{659,200},{587,200},{523,800},
{880,200},{1047,200},{880,200},{784,200},{659,200},{587,200},{523,200},{440,200},
{587,400},{587,200},{659,200},{659,200},{587,600},
{659,200},{784,400},{784,200},{784,400},{784,400},
{880,200},{784,200},{659,200},{587,200},{523,800},
{440,200},{523,200},{440,200},{392,200},{587,400},{659,400},{523,1200},{0,400},
{0,0}
};
unsigned int audio_frequency = 0; //当前音频频率
unsigned int audio_dura = 0; //当前音频持续时间
unsigned int audio_ptr = 0; //辅助读谱指针
unsigned int play_flag = 0; //音乐播放标志。0时不播放，1时开始播放
unsigned int speed = 20;//播放速度
unsigned int mode = 1; //播放模式标志
extern int levelmask=0;
double freq_multi=1.0;//频率因子
void Init_Timer1(void) //初始化计数器A1
{
if(mode == 1){
TA1CCTL1 = OUTMOD_7;
TA1CCR0 = 1000000/440; //设定周期，100000为定时器1的时钟频率，440为音频频率
TA1CCR1 = TA1CCR0/2; //设置占空比为50%
}else if(mode == 2){
if(audio_frequency==0)
TA1CTL=0;
else{
TA1CTL = TASSEL_2 + MC_1;
TA1CCR0=500000/audio_frequency;
TA1CCTL0=CCIE;
}
}
}
void init_music(void)
{
Init_Timer1(); //调用函数，初始化定时器1
Init_Ports_music();
}
//////////////////////////////
// 中断服务程序 //
//////////////////////////////
/**
*计时器A0触发中断,20ms
*/
int divcounter=0;//分频计数器
void update_music(void)
{
//音乐播放代码段,方式1
const unsigned int (*musicptr)[2];
if(play_flag==3)
musicptr=music_data1;
else if(play_flag==4)
musicptr=music_data2;
if(play_flag>0){
if(audio_dura != 0) audio_dura --;
else{
if(mode==1){
TA1CTL = 0; //计时器A1停止
audio_frequency = musicptr[audio_ptr][0]*freq_multi; //读取下一个音符的频率和持续时间（下行）
audio_dura = musicptr[audio_ptr][1]/speed; //改变20可以调整节奏快慢
if(audio_frequency == 0 && audio_dura == 0) {audio_ptr = 0; play_flag = 0;} //音乐播放结束，指针归0
else
{
audio_ptr++; //指针后移一位
if(audio_frequency == 0) TA1CTL = 0;
else{
//启动计时器A1
P2SEL |= BIT1; //将P2.1作为方波输出
TA1CCR0 = 1000000/audio_frequency;
TA1CCR1 = TA1CCR0/2;
TA1CCTL0=0;
TA1CTL = TASSEL_2 + MC_1; //Source:SMCLK = 1MHz, PWM mode
}
}
}
else {
//TA1CTL = 0; //计时器A1停止
audio_frequency = musicptr[audio_ptr][0]*freq_multi; //读取下一个音符的频率和持续时间（下行）
audio_dura = musicptr[audio_ptr][1]/speed; //改变20可以调整节奏快慢
if(audio_frequency == 0 && audio_dura == 0) {audio_ptr = 0; play_flag = 0;} //音乐播放结束，指针归0
else{
audio_ptr++; //指针后移一位
if(audio_frequency == 0) TA1CTL = 0;
else{
//启动计时器A1,开中断
//P2OUT|=BIT2;
TA1CTL = TASSEL_2 + MC_1;
TA1CCR0=500000/audio_frequency;
TA1CCTL0=CCIE;
}
}
}
}
}else{
TA1CTL=0;
}
++divcounter;
}
/**
* 主程序更新控制信号
*/
void update_play_flag(){
if(key_code == 3 && play_flag != 3){
TA1CTL = 0; audio_ptr = 0; play_flag = 3;
} //将3号按钮作为播放音乐1的控制开关
if(key_code == 4 && play_flag != 4){
TA1CTL = 0; audio_ptr = 0; play_flag = 4;
} //将4号按钮作为播放音乐2的控制开关
if(key_code == 16){
TA1CTL = 0; audio_ptr = 0; play_flag = 0;
}
}
bool update_speed=false;
void update_play_speed(){
if(!update_speed & key_code == 7){
speed-=5;
if(speed == 0)
speed = 5;
update_speed=true;
}
if(!update_speed & key_code == 8)
{
speed+=5;
if(speed == 35)
speed = 30;
update_speed=true;
}
if(update_speed & key_code==0)
update_speed=false;
}
bool update_mode=false;
void update_play_mode(){
if(!update_mode & key_code==15){
mode = mode==1 ? 2:1;
levelmask= mode==1 ? 0:1;
update_mode=true;
} else if(update_mode & key_code==0){
update_mode=false;
}
led[0]=(unsigned char)mode;
}
bool update_freq=false;
int freq_level=0;
void update_requency(){
if(!update_freq & key_code == 11){
freq_multi/=2;
--freq_level;
if(freq_level==-2){
freq_level=-1;
freq_multi=0.5;
}
update_freq=true;
}
if(!update_freq & key_code == 12)
{
freq_multi*=2;
++freq_level;
if(freq_level==3){
freq_level=2;
freq_multi=4;
}
update_freq=true;
}
if(update_freq & key_code==0)
update_freq=false;
//state display
if(freq_level<0){
led[1]=1;
}else if(freq_level>0){
if(freq_level==2)
led[1]=2;
else{
if(divcounter==25){
led[1]=led[1]==2?0:2;
divcounter=0;
}
}
}else
led[1]=0;
if(divcounter==25)
divcounter=0;
}
void update_music_ctrl(void)
{
update_play_flag();
update_play_speed();
update_play_mode();
update_requency();
}
////////////播放方案2///////////////
/**
* 变时长中断，用于根据level产生“四路”方波
*/
int togglestate=0;
#pragma vector=TIMER1_A0_VECTOR
__interrupt void Timer1_A1 (void)
{
togglestate = togglestate?0:1;
if(togglestate)
P1OUT =(unsigned char)((P1OUT & 0xF0) + (level&0x0F));
else
P1OUT =(unsigned char)((P1OUT & 0xF0) + 0x00);
}