【正文】 ptr][1]==0) //判是否終止 { /*樂曲終止*/ audio_ptr=0。 audio_dura=0。 } else { audio_dura=music_data[audio_ptr][1]/5。 //讀節(jié)拍，除法用于調整節(jié)奏快慢 if (music_data[audio_ptr][0]!=0) //判休止符 { /*不是休止符*/ //根據音頻計算定時器A1的初值，并啟動定時器A1 audio_frequency=music_data[audio_ptr][0]。 TA1CCR0 = 1000000/audio_frequency。 //設定周期 TA1CCR1 = TA1CCR0/2。 //設置占空比等于50% TA1CTL = TASSEL_2 + MC_1 。 // Source: SMCLK=1MHz, PWM mode, } else { /*是休止符*/ } audio_ptr++。 } } else audio_dura。}//TIMER1 initialize // desired value: 440Hz, PWM 輸出 標準音啦void Timer1_init(void){// Configure Timer1 TA1CTL = TASSEL_2 + MC_1 。 // Source: SMCLK=1MHz, PWM mode, TA1CCTL1 = OUTMOD_7。 TA1CCR0 = 1000000/440。 //設定周期 TA1CCR1 = TA1CCR0/2。 //設置占空比等于50%}// MCU器件初始化，注：會調用上述函數void Init_Devices(void){ WDTCTL = WDTPW + WDTHOLD。 // Stop watchdog timer，停用看門狗 if (CALBC1_8MHZ ==0xFF || CALDCO_8MHZ == 0xFF) { while(1)。 // If calibration constants erased, trap CPU!! } //設置時鐘，內部RC振蕩器。 DCO：8MHz,供CPU時鐘。 SMCLK：1MHz,供定時器時鐘 BCSCTL1 = CALBC1_8MHZ。 // Set range DCOCTL = CALDCO_8MHZ。 // Set DCO step + modulation BCSCTL3 |= LFXT1S_2。 // LFXT1 = VLO IFG1 amp。= ~OFIFG。 // Clear OSCFault flag BCSCTL2 |= DIVS_3。 // SMCLK = DCO/8 Port_Init()。 //調用函數，初始化I/O口 Init_Timer0()。 //調用函數，初始化定時器0 Timer1_init()。 //初始化定時器1 _BIS_SR(GIE)。 //開全局中斷 //all peripherals are now initialized}//////////////////////////////// 中斷服務程序 ////////////////////////////////// Timer0_A0 interrupt service routinevoid gain_control(void){ switch(gain_state) { case 1:CTL3_L。CTL2_L。CTL1_L。CTL0_H。break。 case 2:CTL3_L。CTL2_L。CTL1_H。CTL0_L。break。 case 3:CTL3_L。CTL2_L。CTL1_H。CTL0_H。break。 case 4:CTL3_L。CTL2_H。CTL1_L。CTL0_L。break。 case 5:CTL3_L。CTL2_H。CTL1_L。CTL0_H。break。 case 6:CTL3_L。CTL2_H。CTL1_H。CTL0_L。break。 case 7:CTL3_L。CTL2_H。CTL1_H。CTL0_H。break。 case 8:CTL3_H。CTL2_L。CTL1_L。CTL0_L。break。 case 9:CTL3_H。CTL2_L。CTL1_L。CTL0_H。break。 case 10:CTL3_H。CTL2_L。CTL1_H。CTL0_L。break。 case 11:CTL3_H。CTL2_L。CTL1_H。CTL0_H。break。 case 12:CTL3_H。CTL2_H。CTL1_L。CTL0_L。break。 case 13:CTL3_H。CTL2_H。CTL1_L。CTL0_H。break。 case 14:CTL3_H。CTL2_H。CTL1_H。CTL0_L。break。 case 15:CTL3_H。CTL2_H。CTL1_H。CTL0_H。break。 }}int main(void){ unsigned char i=0,temp。 Init_Devices( )。 while (clock100ms3)。 // 延時60ms等待TM1638上電完成 init_TM1638()。 //初始化TM1638 gain_control()。 while(1) { if(key_flag == 1) { key_flag = 0。 switch(key_code) { case 1: if(++gain_stateGAIN_STATENUM) gain_state = 1。 gain_control()。 break。 case 2: if(gain_state == 0) gain_state = GAIN_STATENUM。 gain_control()。 break。 default: break。 } } digit[2] = gain_state/10。 digit[3] = gain_state%10。 }} 拓展部分unsigned char state = 10。//增益倍數unsigned short1 = 50。unsigned short2 = 100。unsigned long1 = 100。unsigned long2 = 350。int index_change = 0。unsigned char inputHongWai。unsigned hongWai_adder = 0。unsigned hongWai_status = 0。 //0:無脈沖 1。短脈沖 2:長脈沖unsigned char press_flag = 1, press_code = 0, press_state = 0。unsigned char MODE = 0。//0基礎部分 1函數發(fā)生 2音樂播放unsigned char music = 0。unsigned char method = 0。//0：五線 1：四線unsigned char auto_control = 0。unsigned char counter=0。unsigned char counter_flag=0。// 測試用計數值十進制表示unsigned int audio_frequency。// 當前的音頻頻率unsigned int audio_ptr=0,audio_dura=0。//讀取音頻的指針int sample。double volt。//AD轉換后的值double Vmax = 。 //上限double Vmin = 。 //下限//T_A0*100 = A0周期unsigned char T_A0 = 50。unsigned char digit[8]={39。39。,39。39。,39。39。,39。39。,39。39。,39。39。,39。39。,39。39。}。unsigned char led[]={0,0,0,0,0,0,0,0}。unsigned char NumOfMus = 2。//音樂數量：2const unsigned int music_data1[][2]={ {440,600},{494,200},{523,600},{440,200}, {523,400},{494,200},{440,200},{494,400}, {330,400},{494,600},{523,200},{578,600}, {494,200},{578,400},{523,200},{494,200}, {440,800},{659,400},{880,400},{784,400}, {880,200},{784,200},{698,400},{659,200}, {578,200},{659,400},{440,400},{0,200}, {698,400},{578,200},{659,600},{523,200}, {494,200},{330,200},{523,200},{494,200}, {440,800},{659,400},{880,400},{784,400}, {880,200},{784,200},{698,400},{659,200}, {578,200},{659,400},{440,400},{0,200}, {698,400},{578,200},{659,600},{523,200}, {494,200},{330,200},{523,200},{494,200}, {440,800},{0,0}}。const unsigned int music_data2[][2]={ {440,200},{494,200},{523,600},{494,200}, {523,400},{659,400},{494,1200},{330,400}, {440,600},{392,200},{440,400},{523,400}, {392,800},{0,400},{330,400},{350,600}, {330,200},{350,200},{523,600},{330,800}, {0,200},{523,600},{494,600},{370,600}, {494,400},{494,800,},{0,400},{440,200}, {494,200},{523,600},{494,200},{523,400}, {659,400},{494,800},{0,400},{330,400}, {440,600},{392,200},{440,400},{523,400}, {392,1200},{0,200},{330,200},{350,400}, {523,200},{494,600},{523,400},{578,400}, {659,200},{523,400},{0,400},{523,400}, {494,200},{440,400},{494,400},{415,400}, {440,800},{0,400},{523,200},{578,200}, {659,600},{578,200},{659,600},{784,400}, {578,800},{0,400},{392,400},{523,200}, {494,200},{523,400},{659,1200},{0,800}, {440,200},{494,200},{523,400},{494,400}, {578,400},{523,600},{392,600},{0,400}, {698,400},{659,400},{578,400},{523,400}, {659,2400},{0,400},{659,400},{880,800}, {784,800},{659,200},{578,200},{523,400}, {0,200},{523,200},{578,400},{523,200}, {578,400},{784,400},{659,800},{0,400}, {659,400},{880,800},{784,800},{659