计算机原理小学期实验报告.docx

DA及AD转换实验报告自03 张驰昱 20100120281、D/A转换 用DAC0832实现D/A转换，使产生的模拟电压波形分别为锯齿波，三角波和正弦波要求： 程序运行后等待键入（1）若键入‘1’，则产生锯齿波（2）若键入‘2’，则产生三角波（3）若键入‘3’，则产生正弦波（4）若键入‘4’，则返回DOS 程序运行过程中没有新键入别的数字，则维持原状不变，用示波器能观测到连续的电压波形。解决思路：先写三个用于波形发生的过程，分别发出锯齿波、三角波和正弦波。再写一个每次从DAC0832输出数据前都会调用的产生延迟的过程，在这个过程中进行有无按键的判断和分辨按键的判断。主程序先调用这个延迟的过程，这样程序一旦运行起来就相当于不断的在检测按键了。正弦波的值我是通过matlab生成和写入文件，并保存在数据段里的。以下是生成一个周期256个采样sin值的matlab代码：clear;clc;fid=fopen(sine.txt,w);s=round(sin(2*pi/256*[1:256])*127.5+127.5);s=reshape(s,16,16);for i=1:16 fprintf(fid,DB ); fprintf(fid,%03XH,,s(:,i)); fprintf(fid,\n);end源代码：DATAS SEGMENT DNUM DB 01H CSADD DW 0280H HINT1 DB TEETH WAVE,0DH,0AH,$ HINT2 DB TRIANGLE WAVE,0DH,0AH,$ HINT3 DB SINE WAVE,0DH,0AH,$ SINE DB 083H,086H,089H,08CH,08FH,092H,095H,098H,09BH,09EH,0A2H,0A5H,0A7H,0AAH,0ADH,0B0HDB 0B3H,0B6H,0B9H,0BCH,0BEH,0C1H,0C4H,0C6H,0C9H,0CBH,0CEH,0D0H,0D3H,0D5H,0D7H,0DAHDB 0DCH,0DEH,0E0H,0E2H,0E4H,0E6H,0E8H,0EAH,0EBH,0EDH,0EEH,0F0H,0F1H,0F3H,0F4H,0F5HDB 0F6H,0F8H,0F9H,0FAH,0FAH,0FBH,0FCH,0FDH,0FDH,0FEH,0FEH,0FEH,0FFH,0FFH,0FFH,0FFHDB 0FFH,0FFH,0FFH,0FEH,0FEH,0FEH,0FDH,0FDH,0FCH,0FBH,0FAH,0FAH,0F9H,0F8H,0F6H,0F5HDB 0F4H,0F3H,0F1H,0F0H,0EEH,0EDH,0EBH,0EAH,0E8H,0E6H,0E4H,0E2H,0E0H,0DEH,0DCH,0DAHDB 0D7H,0D5H,0D3H,0D0H,0CEH,0CBH,0C9H,0C6H,0C4H,0C1H,0BEH,0BCH,0B9H,0B6H,0B3H,0B0HDB 0ADH,0AAH,0A7H,0A5H,0A2H,09EH,09BH,098H,095H,092H,08FH,08CH,089H,086H,083H,080HDB 07CH,079H,076H,073H,070H,06DH,06AH,067H,064H,061H,05DH,05AH,058H,055H,052H,04FHDB 04CH,049H,046H,043H,041H,03EH,03BH,039H,036H,034H,031H,02FH,02CH,02AH,028H,025HDB 023H,021H,01FH,01DH,01BH,019H,017H,015H,014H,012H,011H,00FH,00EH,00CH,00BH,00AHDB 009H,007H,006H,005H,005H,004H,003H,002H,002H,001H,001H,001H,000H,000H,000H,000HDB 000H,000H,000H,001H,001H,001H,002H,002H,003H,004H,005H,005H,006H,007H,009H,00AHDB 00BH,00CH,00EH,00FH,011H,012H,014H,015H,017H,019H,01BH,01DH,01FH,021H,023H,025HDB 028H,02AH,02CH,02FH,031H,034H,036H,039H,03BH,03EH,041H,043H,046H,049H,04CH,04FHDB 052H,055H,058H,05AH,05DH,061H,064H,067H,06AH,06DH,070H,