#include?
#include?
??
//定義AD9833的時鐘????
#define??FMCLK?250000000?//AD9833的主晶振為1MHz?????
???
sbit?FSYNC1???=P1^0;???//DDS使能引腳低電平有效

sbit?SCLK9833?=P3^2;???//DDS串行時鐘輸入

sbit?SDATA9833=P3^3;???//DDS串行數據輸入
???
//函數聲明????
???
void?Write_word（unsigned?int?dataa）;//寫16位數據到SPI接口????
void?init_ad9833（void）;???
void?output（unsigned?long?freq_dword）;//AD9833輸出指定頻率的正弦波:freq_dword=fout*268435456/FMCLK????
void?delay_nus（unsigned?int?t）;//延時函數——微妙????
void?delay_nms（unsigned?int?t）;//延時函數——毫秒????
???
int?main（void）???
{???????????
?init_ad9833（）;??
?output（100007）;//freq_dword=fout*268435456/FMCLK???????
????while（1）???
????{??????????????
????}???
}???
???
???
???
/*-----------------------------------------------------------------------??
delay_nus???????:長延時函數（GCC內部延時函數的延時過短）??
???
輸入參數:?t?????????:延時時間?us??
-----------------------------------------------------------------------*/???
void?delay_nus（unsigned?int?t）???
{???
????while?（t--）;???
??????????
}???
???
/*-----------------------------------------------------------------------??
delay_nms???????:長延時函數（GCC內部延時函數的延時過短）??
???
輸入參數:?t?????????:延時時間?ms??
-----------------------------------------------------------------------*/???
void?delay_nms（unsigned?int?t）???
{???
????while?（t--）;???
??????????
}???
???
//-----------------------------------------------------------------------????
//Write_word????:?寫16位數據到SPI接口，軟件SPI方式????
//?????
//輸入參數：?data:???數據（16位）????
//-----------------------------------------------------------------------????
???
void?Write_word（unsigned?int?dataa）???
{???
????unsigned?char?i;???
???????
????SCLK9833=1;???
????SDATA9833=1;???
????FSYNC1=1;???
????delay_nus（2）;???
????FSYNC1=0;???
????for（i=0;i<16;i++）???
????{???
????????if（dataa&0x8000）????SDATA9833=1;???
????????else????????????????SDATA9833=0;???
????????delay_nus（1）;???
????????SCLK9833=0;???
????????delay_nus（5）;???
????????SCLK9833=1;?????????????
????????dataa=dataa<<1;???
????}???
???????
????delay_nus（2）;???
????FSYNC1=1;???
????delay_nus（1）;???
????SCLK9833=0;???
????delay_nus（200）;???
}???
void?init_ad9833（void）???
{???
????Write_word（0x2100）;?//28位連續，選擇頻率0，相位0，RESET=1????
????delay_nus（1000）;???
????Write_word（0x2000）;???
????Write_word（0x4000）;?//寫頻率0寄存器的低字節LSB????
????Write_word（0x403f）;?//寫頻率0寄存器的高字節MSB????
????Write_word（0x2900）;?//28位連續，選擇頻率0，相位0，RESET=1????
????Write_word（0x8000）;?//寫頻率1寄存器的低字節LSB????
????Write_word（0x803f）;?//寫頻率1寄存器的高字節MSB????
????Write_word（0xC002）;?//寫相位0寄存器????
????Write_word（0xF100）;?//寫相位1寄存器????
????Write_word（0x2000）;?//28位連續，選擇頻率0，相位0，RESET=0???????
}???
???
//------------------------------------------------------------------????
//output????:AD9833輸出指定頻率的正弦波????
//????
//輸入參數：freq_value???類型：unsigned?long????
//輸出參數：無????
//------------------------------------------------------------------????
???
void?output（unsigned?long?freq_dword）//freq_dword=fout*2684

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

?????文件???????4706??2011-07-21?10:19??AD9833\AD9833程序\AD9833

?????文件???????1038??2011-07-21?10:19??AD9833\AD9833程序\AD9833.hex

?????文件?????????42??2011-07-21?10:19??AD9833\AD9833程序\AD9833.lnp

?????文件???????7485??2011-07-14?10:55??AD9833\AD9833程序\AD9833.LST

?????文件???????7191??2011-07-21?10:19??AD9833\AD9833程序\AD9833.M51

?????文件??????????0??2009-06-29?15:30??AD9833\AD9833程序\AD9833.mpw

?????文件???????7356??2011-07-14?10:55??AD9833\AD9833程序\AD9833.OBJ

?????文件???????1848??2011-08-05?07:53??AD9833\AD9833程序\AD9833.Opt

?????文件????????198??2011-08-05?07:53??AD9833\AD9833程序\AD9833.plg

?????文件???????2001??2011-07-14?12:10??AD9833\AD9833程序\AD9833.Uv2

????.......??????1848??2011-07-21?10:19??AD9833\AD9833程序\AD9833_Opt.Bak

?????文件???????2204??2009-07-03?10:03??AD9833\AD9833程序\AD9833_Uv2.Bak

?????文件????????781??2009-07-23?15:29??AD9833\AD9833程序\config.h

?????文件??????77878??2009-08-11?12:55??AD9833\AD9833程序\Copy_2009811125512.bmp

?????文件??????77878??2009-08-11?12:55??AD9833\AD9833程序\Copy_2009811125531.bmp

?????文件???????6432??2011-07-14?12:10??AD9833\AD9833程序\include\AT89X52.H

?????文件???????3795??2013-03-09?11:26??AD9833\AD9833程序\main.c

?????文件???????6584??2011-07-21?10:19??AD9833\AD9833程序\main.LST

?????文件???????5308??2011-07-21?10:19??AD9833\AD9833程序\main.OBJ

????..A.SH.?????19456??2009-08-11?19:50??AD9833\AD9833程序\Thumbs.db

?????文件????1668702??2009-07-07?16:45??AD9833\AD9833程序\仿真時序.bmp

?????文件??????74989??2009-07-15?11:42??AD9833\AD9833程序\仿真時序Final.bmp

?????文件?????230454??2009-07-07?03:45??AD9833\AD9833程序\時基時序0X2100.bmp

?????文件?????230454??2009-07-08?17:45??AD9833\AD9833程序\時序0X2100.bmp

?????目錄??????????0??2011-07-21?10:19??AD9833\AD9833程序\include

?????目錄??????????0??2011-08-05?07:53??AD9833\AD9833程序

?????目錄??????????0??2013-03-09?11:25??AD9833

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

??????????????2438628????????????????????27



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