基于ad9851的dds信號(hào)源發(fā)生器畢業(yè)設(shè)計(jì)論文-資料下載頁
【導(dǎo)讀】基于AD9851的DDS信號(hào)源發(fā)生器畢業(yè)設(shè)計(jì)論文。13直接數(shù)字頻率合成技術(shù)的現(xiàn)狀1. 14本文的主要工作2. 第2章系統(tǒng)總體方案的分析和設(shè)計(jì)3. 21DDS技術(shù)的基本原理3. 23系統(tǒng)設(shè)計(jì)原理5. 31穩(wěn)壓電源的設(shè)計(jì)6. 32DDS芯片的選擇及與單片機(jī)之間的通信7. 321DDS芯片選擇及引腳圖8. 322AD9851的串并行通信9. 33單片機(jī)AT89S52控制電路10. 333單片機(jī)控制電路圖12. 35低通濾波器的設(shè)計(jì)15. 第4章信號(hào)發(fā)生器的軟件設(shè)計(jì)17. 頻率合成器是現(xiàn)代電子系統(tǒng)的重要組成部分是決定電子系統(tǒng)性能的關(guān)鍵。求低相位噪聲高頻譜純度高捷變速率和高頻率分辨率的頻率合成器已經(jīng)成為頻。率合成技術(shù)發(fā)展的主要趨勢(shì)直接數(shù)字頻率合成DDS是繼直接頻率合成Ds和鎖。合理地采用了DDS技術(shù)以AD9851芯片為核心設(shè)計(jì)了一種結(jié)構(gòu)簡單性能優(yōu)良的信。制程序以及信號(hào)發(fā)生器的外部通信程序完成實(shí)驗(yàn)電路板的制作并通過電。路板的調(diào)試實(shí)驗(yàn)電路工作正常根據(jù)系統(tǒng)的最終測(cè)試結(jié)果可知該信號(hào)發(fā)生器。量技術(shù)中我們常常需要一個(gè)高精度頻率可變的信號(hào)源近年來隨著直接數(shù)字頻率
【正文】 6 uchar slnumaysj uint fre void delay uint z uint ij for i zi 0i for j 110j 0j void delay1 uint y uint i for i yi 0i uchar code tosin[256] 0x800x820x850x880x8b0x8e0x910x940x970x9a0x9d0xa00xa30xa6 0xa90xac0xaf0xb20xb60xb90xbc0xbf0xc20xc50xc70xca0xcc0xcf 0xd10xd40xd60xd80xda0xdd0xdf0xe10xe30xe50xe70xe90xea0xec 0xee0xef0xf10xf20xf40xf50xf60xf70xf80xf90xfa0xfb0xfc0xfd 0xfd0xfe0xff0xff0xff0xff0xff0xff0xff0xff0xff0xff0xff0xff 0xfe0xfd0xfd0xfc0xfb0xfa0xf90xf80xf70xf60xf50xf40xf20xf1 0xef0xee0xec0xea0xe90xe70xe50xe30xe10xde0xdd0xda0xd80xd6 0xd40xd10xcf0xcc0xca0xc70xc50xc20xbf0xbc0xba0xb70xb40xb1 0xae0xab0xa80xa50xa20x9f0x9c0x990x960x930x900x8d0x890x86 0x830x80 0x800x7c0x790x760x720x6f0x6c0x690x660x630x600x5d 0x5a0x570x550x510x4e0x4c0x480x450x430x400x3d0x3a0x380x35 0x330x300x2e0x2b0x290x270x250x220x200x1e0x1c0x1a0x180x16 0x150x130x110x100x0e0x0d0x0b0x0a0x090x080x070x060x050x04 0x030x020x020x010x000x000x000x000x000x000x000x000x000x00 0x000x000x010x020x020x030x040x050x060x070x080x090x0a0x0b 0x0d0x0e0x100x110x130x150x160x180x1a0x1c0x1e0x200x220x25 0x270x290x2b0x2e0x300x330x350x380x3a0x3d0x400x430x450x48 0x4c0x4e0x510x550x570x5a0x5d0x600x630x660x690x6c0x6f0x72 0x760x790x7c0x80 void write_ uchar lcdrs 0 P1 delay 5 lcde 1 delay 5 lcde 0 void write_data uchar date lcdrs 1 P1 date delay 5 lcde 1 delay 5 lcde 0 void init lcdrw 0 lcde 0 wr 0 cs 0 write_ 0x38 write_ 0x0c write_ 0x06 write_ 0x01 write_ 0x800x00 write_data 0x77 寫 wave write_data 0x61 write_data 0x76 write_data 0x65 write_data 0x3a write_ 0x800x40 寫 f write_data 0x66 write_data 0x3a void write_f uint date 寫頻率 uchar qianbaishige qian date1000 bai date10010 shi date1010 ge date10 write_ 0x800x42 write_data 0x30qian write_data 0x30bai write_data 0x30shi write_data 0x30ge write_data 0x48 write_data 0x5a void xsf 顯示頻率 if slnum 1 fre 1000 93ys write_f fre if slnum 2 fre 100000 3ys write_f fre if slnum 3 fre 1000 153ys write_f fre void keyscanf d 0 if s1 0 delay 5 if s1 0 while s1 slnum if slnum 1 ys 0 write_ 0x800x05 write_data 0x73 寫 sine write_data 0x69 write_data 0x6e write_data 0x65 write_data 0x20 write_data 0x20 if slnum 2 ys 10 write_ 0x800x05 write_data 0x73 寫 squrae write_data 0x71 write_data 0x75 write_data 0x61 write_data 0x72 write_data 0x65 if slnum 3 ys 0 write_ 0x800x05 寫 train write_data 0x74 write_data 0x72 write_data 0x61 write_data 0x69 write_data 0x6e write_data 0x20 if slnum 4 slnum 0 P1 0 write_ 0x800x05 write_data 0x20 write_data 0x20 write_data 0x20 write_data 0x20 write_data 0x20 write_data 0x20 write_ 0x800x42 write_data 0x20 write_data 0x20 write_data 0x20 write_data 0x20 write_data 0x20 write_data 0x20 if s2 0 delay 5 if s2 0 while s2 ys if s3 0 delay 5 if s3 0 while s3 ys void main init while 1 keyscanf if slnum 1 正弦波 for j 0j 255j P0 tosin[j] delay ys if slnum 2 方波 P0 0xff delay1 ys P0 0 delay1 ys if slnum 3 三角波 if a 128 P0 a delay1 ys else P0 255a delay1 ys a if s1s2s3 xsfAD9851 LCD1602 鍵盤 單片機(jī) 低通濾波器 信號(hào)輸出 濾波 5v 直流輸出 7805 穩(wěn)壓 12V 直流電源
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