#include??//包括一個52標(biāo)準(zhǔn)內(nèi)核的頭文件
#define?uchar?unsigned?char?//定義一下方便使用
#define?uint?unsigned?int
#define?ulong?unsigned?long

sbit?cs=P2^0;??//片選
sbit?volbit=P2^1;?//音量位數(shù)據(jù)
sbit?clk=P2^2;??//時鐘
sbit?war=P2^3;??//極限警告輸出
unsigned?int?vol;
void?warn（）;
void?sendvol（uint?vol）;
void?delay（uint?t）;
void?voldown（）;
void?volup（）;

void?volup（）?//音量加
{
?if?（vol==0Xffff）??//判斷是否達(dá)到最大音量
??{
???warn（）?;//警報
??}
?if（vol???{
???vol+=0X0101;?//增加音量
???sendvol（vol）;?//輸出音量
??}
}


void?voldown（）?//音量減
{
?if（vol?>?0x0000）?//判斷是否達(dá)到最小音量
??{
???vol-=0X0101;??//音量減
???sendvol（vol）;?//音量輸出??
??}
??else
???warn（）;?//警報
}


void?sendvol（uint?vol）?//輸出音量
{
?uchar?i;
?cs=0;?//片選
?for（i=16;i>0;i--）?//發(fā)送16bit音量數(shù)據(jù)
??{
???clk=0;
???if（vol&0X0001==0x0001）
???

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????4811??2009-08-31?07:50??PGA2310\PGA2310

?????文件???????1597??2009-08-31?07:52??PGA2310\PGA2310.c

?????文件???????1075??2009-08-31?07:50??PGA2310\PGA2310.hex

?????文件?????????31??2009-08-31?07:50??PGA2310\PGA2310.lnp

?????文件???????4205??2009-08-31?07:50??PGA2310\PGA2310.LST

?????文件???????9840??2009-08-31?07:50??PGA2310\PGA2310.M51

?????文件???????5610??2009-08-31?07:50??PGA2310\PGA2310.OBJ

?????文件???????1181??2009-08-31?07:52??PGA2310\PGA2310.Opt

?????文件????????334??2009-08-31?07:50??PGA2310\PGA2310.plg

?????文件???????1682??2009-08-30?16:30??PGA2310\PGA2310.Uv2

????.......??????1174??2009-08-30?17:36??PGA2310\PGA2310_Opt.Bak

????.......??????1682??2009-08-30?16:15??PGA2310\PGA2310_Uv2.Bak

?????目錄??????????0??2009-08-31?07:52??PGA2310

-----------?---------??----------?-----??----

????????????????33222????????????????????13