简易波形发生器的设计制作.doc

relationship, established equivalent relationship 14, and subject: application problem (4)-scores and percentage application problem review content overview answers scores, and percentage application problem of key is: according to meaning, (1) determine standard volume (units 1) (2) find associate volume rate corresponds to relationship, Then in-line solution. Category fraction multiplication word problem score Division applications engineering problem problem XV, a subject: review of the measurement of the amount of capacity, measurement and units of measurement of common units of measurement and their significance in rate 1, currency, length, area, volume, unit size, volume, weight and rate. (Omitted) 2, commonly used time units and their relationships. (Slightly) with a measurement units Zhijian of of poly 1, and of method 2, and poly method 3, and of method and poly method of relationship measurement distance of method 1, and tool measurement 2, and estimates 16, and subject: geometry preliminary knowledge (1)-line and angle review content line, and segment, and Ray, and vertical, and parallel, and angle angle of classification (slightly) 17, and subject: geometry preliminary knowledge (2)-plane graphics review content triangle, and edges shaped, and round, and fan axisymmetric graphics perimeter and area combination graphics of area subject : Preliminary knowledge (3)-review of solid content category 1-d shapes are divided into: cylinder and cone 2, column is divided into: cuboid, square 3, cone cone of the features of cuboids and cubes relationship between characteristics of circular cone is slightly solid surface area and volume 1, size 2, table .和任务四；简易波形发生器的设计制作1动能：熟练示波器的使用，和D/A、A/D转换电路的设计与应用，通过单片机控制D/A或A/D转换。2电路原理图：D/A转换实验模块电路原理图A/D转换实验模块电路原理图3接线：D/A转换实验板接线4源程序：#include#include#define DAC0832 XBYTE0X7FFFunsigned char n;void DelayMS(unsigned int ms) unsigned char i; while(ms-) for(i=0;i120;i+);void main() while(1) P1=0XFF; switch(P1) case 0xfe:DAC0832=0XFF; DelayMS(10); DAC0832=0X00; DAC0832=0X00; DelayMS(10); break; case 0xfd:DAC0832=n+; break; case 0xfb:for(n=0;n0;n-) DAC0832=n; DelayMS(1); 5完成情况：由于设备示波器问题，显示波形动荡很大，不过与理论波形走势相似，1） 闭合开关S1：调节示波器水平方向的时间档位（ms级）和垂直方向的电压档（v级），可观察到示波器显示方波，与理论如以下（a）图相似；2） 断开S1，闭合S2：可观察到示波器显示锯形波形，与理论如以下（b）图相似；3） 断开S2，闭合S3：可观察到示波器显示三角波形，与理论如以下（c）图相似；扩展1：修改源程序中各波形的延时时间，即修改调用函数Delay MS(n)中的参数n,重新编译、烧写程序至单片机，然后观察并记录示波器输出的各种波形，要求将输出波形图绘制在本任务报告中。1功能：对比不同时间波形的变化。2源程序：任务中Delay MS(n)中的参数n改为原来的10倍大，其他不变。3完成情况：由于设备示波器问题，显示波形动荡很大，不过与理论波形走势相似，1） 闭合开关S1：调节示波器水平方向的时间档位（ms级）和垂直方向的电压档（v级），可观察到示波器显示方波，与理论如以下（a）图相似；2） 断开S1，闭合S2：调节示波器水平方向的时间档位（us级）和垂直方向的电压档（v级），可观察到示波器显示锯形波形，与理论如以下（b）图相似；3） 断开S2，闭合S3：调节示波器水平方向的