实例介绍
【实例简介】实例内涵取模工具,初始代码完成童年的播放
【实例截图】用正点原子源码改的代码,精英版可以直接使用
【核心代码】
void PWM_Init(unsigned int arr,unsigned int psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE);
//GPIO_PinRemapConfig(GPIO_Remap_TIM4, ENABLE); //Timer4ÖØÓ³Éä TIM4_CH3->PB8
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //TIM_CH3
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //¸´ÓÃÍÆÍìÊä³ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);//³õʼ»¯GPIO
TIM_TimeBaseStructure.TIM_Period = (144000/arr);//Ö¸¶¨ÔÚÏÂÒ»´Î¸üÐÂʼþʱ¼ÓÔØµ½»î¶¯×Ô¶¯ÖØÐ¼ÓÔØ¼Ä´æÆ÷ÖеÄÖÜÆÚÖµ
TIM_TimeBaseStructure.TIM_Prescaler =499;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High; //Êä³ö¼«ÐÔ:TIMÊä³ö±È½Ï¼«ÐÔ¸ß
TIM_OCInitStructure.TIM_OutputState= TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse=(144000/arr)/2; //Ö¸¶¨Òª¼ÓÔØµ½²¶»ñ±È½Ï¼Ä´æÆ÷ÖеÄÂö³åÖµ
TIM_OC3Init(TIM4, &TIM_OCInitStructure); //³õʼ»¯TIM4µÄCH3ͨµÀ
TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Enable); //ʹÄÜTIM4ÔÚCH3ͨµÀCCR3ÉϵÄԤװÔԼĴæÆ÷
TIM_ARRPreloadConfig(TIM4,ENABLE);//ʹÄÜTIM4ÔÚCH3ͨµÀARR3ÉϵÄԤװÔڼĴæÆ÷
TIM_Cmd(TIM4,ENABLE); //ʹÄÜTIM4
}
void Jiepai(unsigned char J)
{
switch (J)
{
case 0x00:
JiePai = 1600;
break;
case 0x01:
JiePai = 800;
break;
case 0x02:
JiePai = 400;
break;
case 0x03:
JiePai = 200;
break;
case 0x04:
JiePai = 100;
break;
case 0x66:
JiePai = 600;
break;
default:
JiePai = 600;
break;
}
}
void Music(unsigned char Y)
{
switch (Y)
{
case 0x0B:
YinJie = MusicLow[0];
break;
case 0x0C:
YinJie = MusicLow[1];
break;
case 0x0D:
YinJie = MusicLow[2];
break;
case 0x0E:
YinJie = MusicLow[3];
break;
case 0x0F:
YinJie = MusicLow[4];
break;
case 0x10:
YinJie = MusicLow[5];
break;
case 0x11:
YinJie = MusicLow[6];
break;
case 0x15:
YinJie = MusicHigh[0];
break;
case 0x16:
YinJie = MusicHigh[1];
break;
case 0x17:
YinJie = MusicHigh[2];
break;
case 0x18:
YinJie = MusicHigh[3];
break;
case 0x19:
YinJie = MusicHigh[4];
break;
case 0x1A:
YinJie = MusicHigh[5];
break;
case 0x1B:
YinJie = MusicHigh[6];
break;
case 0x1F:
YinJie = MusicHigher[0];
break;
case 0x20:
YinJie = MusicHigher[1];
break;
case 0x21:
YinJie = MusicHigher[2];
break;
case 0x22:
YinJie = MusicHigher[3];
break;
case 0x23:
YinJie = MusicHigher[4];
break;
case 0x24:
YinJie = MusicHigher[5];
break;
case 0x25:
YinJie = MusicHigher[6];
break;
default:
YinJie = 0;
break;
}
}
【实例截图】用正点原子源码改的代码,精英版可以直接使用

【核心代码】
void PWM_Init(unsigned int arr,unsigned int psc)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE);
//GPIO_PinRemapConfig(GPIO_Remap_TIM4, ENABLE); //Timer4ÖØÓ³Éä TIM4_CH3->PB8
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //TIM_CH3
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //¸´ÓÃÍÆÍìÊä³ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);//³õʼ»¯GPIO
TIM_TimeBaseStructure.TIM_Period = (144000/arr);//Ö¸¶¨ÔÚÏÂÒ»´Î¸üÐÂʼþʱ¼ÓÔØµ½»î¶¯×Ô¶¯ÖØÐ¼ÓÔØ¼Ä´æÆ÷ÖеÄÖÜÆÚÖµ
TIM_TimeBaseStructure.TIM_Prescaler =499;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High; //Êä³ö¼«ÐÔ:TIMÊä³ö±È½Ï¼«ÐÔ¸ß
TIM_OCInitStructure.TIM_OutputState= TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse=(144000/arr)/2; //Ö¸¶¨Òª¼ÓÔØµ½²¶»ñ±È½Ï¼Ä´æÆ÷ÖеÄÂö³åÖµ
TIM_OC3Init(TIM4, &TIM_OCInitStructure); //³õʼ»¯TIM4µÄCH3ͨµÀ
TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Enable); //ʹÄÜTIM4ÔÚCH3ͨµÀCCR3ÉϵÄԤװÔԼĴæÆ÷
TIM_ARRPreloadConfig(TIM4,ENABLE);//ʹÄÜTIM4ÔÚCH3ͨµÀARR3ÉϵÄԤװÔڼĴæÆ÷
TIM_Cmd(TIM4,ENABLE); //ʹÄÜTIM4
}
void Jiepai(unsigned char J)
{
switch (J)
{
case 0x00:
JiePai = 1600;
break;
case 0x01:
JiePai = 800;
break;
case 0x02:
JiePai = 400;
break;
case 0x03:
JiePai = 200;
break;
case 0x04:
JiePai = 100;
break;
case 0x66:
JiePai = 600;
break;
default:
JiePai = 600;
break;
}
}
void Music(unsigned char Y)
{
switch (Y)
{
case 0x0B:
YinJie = MusicLow[0];
break;
case 0x0C:
YinJie = MusicLow[1];
break;
case 0x0D:
YinJie = MusicLow[2];
break;
case 0x0E:
YinJie = MusicLow[3];
break;
case 0x0F:
YinJie = MusicLow[4];
break;
case 0x10:
YinJie = MusicLow[5];
break;
case 0x11:
YinJie = MusicLow[6];
break;
case 0x15:
YinJie = MusicHigh[0];
break;
case 0x16:
YinJie = MusicHigh[1];
break;
case 0x17:
YinJie = MusicHigh[2];
break;
case 0x18:
YinJie = MusicHigh[3];
break;
case 0x19:
YinJie = MusicHigh[4];
break;
case 0x1A:
YinJie = MusicHigh[5];
break;
case 0x1B:
YinJie = MusicHigh[6];
break;
case 0x1F:
YinJie = MusicHigher[0];
break;
case 0x20:
YinJie = MusicHigher[1];
break;
case 0x21:
YinJie = MusicHigher[2];
break;
case 0x22:
YinJie = MusicHigher[3];
break;
case 0x23:
YinJie = MusicHigher[4];
break;
case 0x24:
YinJie = MusicHigher[5];
break;
case 0x25:
YinJie = MusicHigher[6];
break;
default:
YinJie = 0;
break;
}
}
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