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用c8051f单片机的pwm功能驱动耳机发出鸟鸣声

2011-03-14 13:02:11| 分类：默认分类 | 标签： |举报 |字号大中小订阅

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把效果汇报给大家！
先使用c8051f330，由于存储空间小（8k),后来换用c8051f340（64k）,采用8位
pwm，周期23.4K hz，存储了3秒左右的音频数据。效果还可以！就是音频数据占用的数据比较大！
如果扩展spi接口的flash 存储器，就可以做简单实用的mp3了！
与mp3相比硬件成本很低的！

耳机采用的是px100

///下边是参考代码
#include <c8051f340.h>
void OSCILLATOR_Init (void);
void PORT_Init (void);
void PCA0_Init (void);
void main (void)
{
   unsigned int delay_count;
   PCA0MD = 0x00;
PORT_Init ();
OSCILLATOR_Init ();
PCA0_Init ();
while (1)
   { for (delay_count = 15000; delay_count > 0; delay_count--);
// PCA0CPH0 = pwm数据;即音频数据
};
}
void OSCILLATOR_Init (void)
{ OSCICN = 0x83;
CLKSEL = 0x00;
       }
void PORT_Init (void)
{ XBR0    = 0x00;
   XBR1    = 0x41;
P0MDOUT |= 0x01;
        }
void PCA0_Init (void)
{PCA0CN = 0x00;
PCA0MD = 0x08;
PCA0CPM0 = 0x42;
PCA0CPH0 = 256 - (256 * 0.5);
CR = 1;
}

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              blogAbstract:'  <P\><WBR\>把效果汇报给大家！<BR\>先使用c8051f330，由于存储空间小（8k),后来换用c8051f340（64k）,采用8位<BR\>pwm，周期23.4K hz，存储了3秒左右的音频数据。效果还可以！就是音频数据占用的数据比较大！<BR\>如果扩展spi接口的flash 存储器，就可以做简单实用的mp3了！<BR\>与mp3相比硬件成本很低的！</P\>  <P\>耳机采用的是px100</P\>  <P\> </P\>  <P\>///下边是参考代码<BR\>#include <c8051f340.h>                <BR\>void OSCILLATOR_Init (void);<BR\>void PORT_Init (void);</P\>',
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