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#1 |
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HELLOCQ Honor Roll
¼ÓÈëÈÕÆÚ: 2004-06-24
Ìû×Ó: 5,179
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#2 |
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#3 |
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HELLOCQ Honor Roll
¼ÓÈëÈÕÆÚ: 2004-06-24
Ìû×Ó: 5,179
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#6 | |
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HELLOCQ Honor Roll
¼ÓÈëÈÕÆÚ: 2004-06-24
Ìû×Ó: 5,179
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#7 |
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HELLOCQ Honor Roll
¼ÓÈëÈÕÆÚ: 2004-06-24
Ìû×Ó: 5,179
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#10 |
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#11 | |
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#12 |
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HELLOCQ Honor Roll
¼ÓÈëÈÕÆÚ: 2003-08-13
ÄúµÄסַ: Shenzhen China
Ìû×Ó: 4,023
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#14 | |
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HELLOCQ Honor Roll
¼ÓÈëÈÕÆÚ: 2004-06-24
Ìû×Ó: 5,179
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#15 |
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#16 |
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¼ÓÈëÈÕÆÚ: 2003-03-08
Ìû×Ó: 1,009
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#17 | |
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HELLOCQ Honor Roll
¼ÓÈëÈÕÆÚ: 2004-06-24
Ìû×Ó: 5,179
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#18 |
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¼ÓÈëÈÕÆÚ: 2003-03-08
Ìû×Ó: 1,009
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#19 | |
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HELLOCQ Honor Roll
¼ÓÈëÈÕÆÚ: 2004-06-24
Ìû×Ó: 5,179
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¼ÓÈëÈÕÆÚ: 2003-03-08
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#22 |
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#23 | |
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Ìû×Ó: 16
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#24 |
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¼ÓÈëÈÕÆÚ: 2004-09-30
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µÚÒ»ÖÖ£ºÖ±½Ó³Ë³ý·¨ word=F/£¨180000000/4294967296£©»òÕß word=F*£¨4294967296/180000000£© £¨180000000/4294967296£©ºÍ £¨4294967296/180000000£©ÊÂÏÈËãºÃµÄ¡£ ÓÃAVRµ¥Æ¬»úÔËËã14.020000MHz £¨ÊÖ¹¤¼ÆËãµÄ¿ØÖÆ×ÖΪ334530230£© word=F/£¨180000000/4294967296£© ºÄʱ1112¸öʱÖÓµ¥Î» ½á¹û334530208 word=F*£¨4294967296/180000000£©ºÄʱ520¸öʱÖÓµ¥Î» ½á¹û334530208 ºÃÏñ³Ë·¨±È³ý·¨¿ìÒ»±¶ÒÔÉÏ¡£µ«ÊÇÎó²î×î´ó£¬Ïà²î22¡£ ×¢£º¸ã²»ÇåΪʲôֱ½Ó³Ë³ýÎó²îÕâô´ó£¬Ò²ÊÔ¹ýË«¾«¶È£¬³ÌÐò¸ü´óÁË£¬µ«½á¹ûÒ»Ñù¡£ µÚ¶þÖÖ£º¼ò»¯µÄ´óÕûÊý³Ë·¨ #define FF0 238609294 #define FF1 23860929 #define FF2 2386093 #define FF3 238609 #define FF4 23861 #define FF5 2386 #define FF6 237 #define FF7 24 unsigned long DDS_Ctrl(unsigned char *fno) { unsigned long dds_no; dds_no=(*(fno+7))*FF7+ (*(fno+6))*FF6+ (*(fno+5))*FF5+ (*(fno+4))*FF4+ (*(fno+3))*FF3+ (*(fno+2))*FF2+ (*(fno+1))*FF1+ (*fno)*FF0 ; return(dds_no); } ÓÃAVRµ¥Æ¬»úÔËËã14.020000MHz £¨ÊÖ¹¤¼ÆËãµÄ¿ØÖÆ×ÖΪ334530230£© ºÄʱ823¸öʱÖÓµ¥Î» ½á¹û334530228 Îó²îΪ2¡£ µÚÈýÖÖ£º¼ò»¯µÄ´óÕûÊý³ý·¨£¨Î»ÒÆÔËËãʵÏÖ£© long DDS_FRE_Word(long fre) { long tmp1; long tmp2=0; unsigned char i; tmp1=fre; for(i=0;i<32;i++) { if(tmp1>=180000000) { tmp2++; tmp1=tmp1-180000000; } tmp1=tmp1<<1; tmp2=tmp2<<1; } return tmp2; } ÓÃAVRµ¥Æ¬»úÔËËã14.020000MHz £¨ÊÖ¹¤¼ÆËãµÄ¿ØÖÆ×ÖΪ334530230£© ºÄʱ2812¸öʱÖÓµ¥Î» ½á¹û334530230 Îó²îΪ0¡£ ´ÓÒÔÉÏÈýÖÖËã·¨À´¿´ÊǾ«¶È¸ßµÄÓÃʱ³¤£¬ÓÃʱ¶ÌµÄ¾«¶È²î£¬µÚ¶þÖÖËã·¨¾«¶ÈºÍÓÃʱ±È½ÏÊÊÖС£
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