信號發(fā)生器課程設計論文(編輯修改稿)
2025-07-16 01:28 本頁面
【文章內(nèi)容簡介】 AC0832=0。延時延時YNYN圖6 方波產(chǎn)生流程圖 階梯波產(chǎn)生流程圖通過對脈寬的調(diào)制，我們可以設計階梯波的流程圖，如圖7所示。開始延時i255i=0。DAC0832=i。i=i+1。YNYN圖7 階梯波程序流程圖 三角波程序流程圖三角波程序流程圖如圖7所示，將0255先送給DAC0832，然后在反過來將2550送給DAC0832，從而可產(chǎn)生三角波。開始i=0。DAC0832=i。延時i=i+1。i255i=255。DAC0832=i。延時i0i=i1。YNYNYNNY圖8 三角波程序流程圖 正弦波程序流程圖正弦波程序流程圖如圖8所示。正弦波波形設計通過查表指令得到。當進入正弦波后，依次將一個256個數(shù)的表值送給DAC0832，即可得到波形。開始i=0。DAC0832=table2[i]。延時i=i+1。i255YNYN圖9 正弦波程序流程圖 中斷響應流程圖外部中斷0與外部中斷1分別實現(xiàn)了波形頻率調(diào)節(jié)與波形轉(zhuǎn)換，通過對外部中斷的計數(shù)實現(xiàn)了波形轉(zhuǎn)換與頻率增加。中斷流程圖如圖10所示。外中斷0HZ=HZ+10。j=j+1。j16j=0。HZ250HZ=80。返回外中斷1K=K+1K4K=0。返回YNYNYN圖10 外中斷流程圖 軟件程序程序清單： include include define DAC0832 XBYTE[0X0FFF]int code table2[]={100,102,104,107,109,112,114,117,119,121,124,126,129,131,133,135,138,140,142,144,147,149,151,153,155,157,159,161,163,165,167,168,170,172,174,175,177,178,180,181,183,184,185,187,188,189,190,191,192,193,194,194,195,196,197,197,198,198,198,199,199,199,199,199,200,199,199,199,199,199,198,198,198,197,197,196,195,194,194,193,192,191,190,189,188,187,185,184,183,181,180,178,177,175,174,172,170,168,167,165,163,161,159,157,155,153,151,149,147,144,142,140,138,135,133,131,129,126,124,121,119,117,114,112,109,107,104,102,100,97,95,92,90,87,85,82,80,78,75,73,70,68,66,64,61,59,57,55,52,50,48,46,44,42,40,38,36,34,32,31,29,27,25,24,22,21
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