怎样用c语言实现矩形波的移相(右移30°)假如矩形波函数c语言怎么表示你矩形波函数c语言怎么表示的函数是double rect_wave(double x);
那么调用的时候用 double y = rect_wave(x - PI / 6.0f);
即可 。
其中PI就是π:
double PI = 3.14159265358979323846264338327950288f;圆周率π
vc6.0如何绘制矩形波不管画
矩形波
还是什么其他曲线,核心思想都是换算
原始数据
为屏幕
坐标轴
上的坐标位置 , 下面信息仅供供参考 。
画坐标曲线的主要思路是:先找到坐标值中x的最小值minX,最大值maxX 。同样取到y的最小值minY,最大值maxY 。设图形宽度为width,高度为height,于是对于坐标(x,y)对应到图上的位置是
:
((x-minX)*width/(maxX-minX),(y-minY)*height/(maxY-minY))
void
CDrawCoorView::OnDraw(CDC*
pDC)
{
CDrawCoorDoc*
pDoc
=
GetDocument();
ASSERT_VALID(pDoc);
//
TODO:
add
draw
code
for
native
data
here
//初始化坐标值,一般从数据库取得 。这里为了示例方便取得比较简单
const
int
num=10;
float
initX[num]={1,2,3,4,5,6,7,8,9,10};
float
initY[num]={0.5,2,2.8,4,5.6,6,7,9.4,13.8,23.4};
//分别取得X和Y最大值,最小值
float
maxX=initX[0];
float
minX=initX[0];
float
maxY=initY[0];
float
minY=initY[0];
for(int
i=0;i
maxX)
maxX=initX;
if(initX
maxY)
maxY=initY;
if(initY
0)
minX=0;
//如果原点必须在Y轴上,加上下面2行 , 否则注释掉
if(minY0)
minY=0;
//确定图象显示大小
int
width=500;
int
height=300;
//确定坐标图四周预留的空白大小
const
int
mytop=10;
const
int
mybottom=40;
const
int
myleft=80;
const
int
myright=50;
//确定X,Y轴每单位显示宽度
float
intervalX=(width-myleft-myright)/(maxX-minX);
float
intervalY=(height-mybottom-mytop)/(maxY-minY);
//绘制曲线 。由于绘图坐标的Y轴是向下延升,所以这里每个点的Y值是用
//图象高度减去y值大小 。
pDC-MoveTo(int(myleft (initX[0]-minX)*intervalX),
int(height-(mybottom (initY[0]-minY)*intervalY)));
for(i=0;i
LineTo(int(myleft (initX-minX)*intervalX),
int(height-(mybottom (initY-minY)*intervalY)));
}
//绘制X , Y轴
//X轴从图形区域最左端到最右端
float
bottomY=0;
float
leftX=0;
//bottomY表示X轴的y值,leftX表示Y轴的x值
if(minY0)
bottomY=minY;
if(minX0)
leftX=minX;
pDC-MoveTo(int(myleft),int(height-(mybottom (bottomY-minY)*intervalY)));
pDC-LineTo(int(width-myright),int(height-(mybottom (bottomY-minY)*intervalY)));
//Y轴从图形区域最底端到最顶端
pDC-MoveTo(int(myleft (leftX-minX)*intervalX),int(height-mybottom));
pDC-LineTo(int(myleft (leftX-minX)*intervalX),int(mytop));
//确定显示刻度个数
const
int
count=5;
//确定每个显示刻度之间的宽度
float
spaceX=(width-myleft-myright)/count;
float
spaceY=(height-mybottom-mytop)/count;
//绘制刻度和刻度值
CString
str;
//X轴
for(i=0;i=count;i)
{
str.Format("%.1f",minX i*(maxX-minX)/count);
pDC-MoveTo(int(myleft spaceX*i),int(height-(mybottom (bottomY-minY)*intervalY)));
pDC-LineTo(int(myleft spaceX*i),int(height-(mybottom (bottomY-minY)*intervalY 5)));
pDC-TextOut(int(myleft spaceX*i-10),
int(height-(mybottom (bottomY-minY)*intervalY-5)),str);
}
//Y轴
for(i=0;i=count;i)
{
str.Format("%.1f",minY i*(maxY-minY)/count);
pDC-MoveTo(int(myleft (leftX-minX)*intervalX),int(height-(mybottom spaceY*i)));
pDC-LineTo(int(myleft (leftX-minX*intervalX 5),int(height-(mybottom spaceY*i)));
pDC-TextOut(int(myleft (leftX-minX)*intervalX-30),
int(height-(mybottom spaceY*i 8)),str);
}
//绘制X , Y轴的变量名
pDC-TextOut(width/2,height-20,"时间(h)");
pDC-TextOut(0,height/2,"产量(kg)");
}
51 单片机和DAC0832输出方波、矩形波和正弦波由液晶1602显示的C语言程序显示频率,幅度可调,可产生四种波形,正弦波,方波,锯齿波,三角波,希望你能喜欢,给你发了一张效果图,喜欢的话别忘了采纳我的回答啊
#includereg52.h
#defineuchar unsigned char
#defineuintunsigned int
#define DAdataP0 //DA数据端口
sbit DA_S1= P2^0;// 控制DAC0832的8位输入寄存器,仅当都为0时,可以输出数据(处于直通状态),否则 , 输出将被锁存
sbit DA_S2= P2^1;// 控制DAC0832的8位DAC寄存器,仅当都为0时 , 可以输出数据(处于直通状态),否则,输出将被锁存
sbit key=P3^2;
uchar wavecount;//'抽点'计数
uchar THtemp,TLtemp;//传递频率的中间变量
uchar judge=1;//在方波输出函数中用于简单判别作用
uchar waveform;//当其为0、1、2时 , 分别代表三种波
uchar code freq_unit[3]={10,50,200}; //三种波的频率单位
uchar idata wavefreq[3]={1,1,1};//给每种波定义一个数组单元,用于存放单位频率的个数
uchar codelcd_hang1[]={"Sine Wave" "Triangle Wave" "Square Wave" "Select Wave:" "press No.1 key! "};
uchar idata lcd_hang2[16]={"f=Hz"};
uchar code waveTH[]={
0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xec,0xf6,0xf9,0xfb,0xfc,0xfc,0xfd,0xfd,0xfd,0xfe};
uchar code waveTL[]={
0x06,0x8a,0x10,0x4e,0x78,0x93,0xa8,0xb3,0xbe,0xc6, //正弦波频率调整中间值
0xac,0xde,0x48,0x7a,0x99,0xaf,0xbb,0xc8,0xd0,0xde, //三角波频率调整中间值
0x88,0x50,0x90,0x32,0x34,0xbe,0x4a,0xa3,0xe5,0x2c};
/*************************************************************************************************/
uchar code triangle_tab[]={//每隔数字8,采取一次
0x00,0x08,0x10,0x18,0x20,0x28,0x30,0x38,0x40,0x48,0x50,0x58,0x60,0x68,0x70,0x78,
0x80,0x88,0x90,0x98,0xa0,0xa8,0xb0,0xb8,0xc0,0xc8,0xd0,0xd8,0xe0,0xe8,0xf0,0xf8,0xff,
0xf8,0xf0,0xe8,0xe0,0xd8,0xd0,0xc8,0xc0,0xb8,0xb0,0xa8,0xa0,0x98,0x90,0x88,0x80,
0x78,0x70,0x68,0x60,0x58,0x50,0x48,0x40,0x38,0x30,0x28,0x20,0x18,0x10,0x08,0x00};
uchar code sine_tab[256]={
//输出电压从0到最大值(正弦波1/4部分)
0x80,0x83,0x86,0x89,0x8d,0x90,0x93,0x96,0x99,0x9c,0x9f,0xa2,0xa5,0xa8,0xab,0xae,0xb1,0xb4,0xb7,0xba,0xbc,
0xbf,0xc2,0xc5,0xc7,0xca,0xcc,0xcf,0xd1,0xd4,0xd6,0xd8,0xda,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,
0xee,0xef,0xf1,0xf2,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfd,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,
//输出电压从最大值到0(正弦波1/4部分)
0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0xfd,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf2,0xf1,0xef,
0xee,0xec,0xea,0xe9,0xe7,0xe5,0xe3,0xe1,0xde,0xdd,0xda,0xd8,0xd6,0xd4,0xd1,0xcf,0xcc,0xca,0xc7,0xc5,0xc2,
0xbf,0xbc,0xba,0xb7,0xb4,0xb1,0xae,0xab,0xa8,0xa5,0xa2,0x9f,0x9c,0x99 ,0x96,0x93,0x90,0x8d,0x89,0x86,0x83,0x80,
//输出电压从0到最小值(正弦波1/4部分)
0x80,0x7c,0x79,0x76,0x72,0x6f,0x6c,0x69,0x66,0x63,0x60,0x5d,0x5a,0x57,0x55,0x51,0x4e,0x4c,0x48,0x45,0x43,
0x40,0x3d,0x3a,0x38,0x35,0x33,0x30,0x2e,0x2b,0x29,0x27,0x25,0x22,0x20,0x1e,0x1c,0x1a,0x18,0x16 ,0x15,0x13,
0x11,0x10,0x0e,0x0d,0x0b,0x0a,0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00,
//输出电压从最小值到0(正弦波1/4部分)
0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x02 ,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0d,0x0e,0x10,
0x11,0x13,0x15 ,0x16,0x18,0x1a,0x1c,0x1e,0x20,0x22,0x25,0x27,0x29,0x2b,0x2e,0x30,0x33,0x35,0x38,0x3a,0x3d,
0x40,0x43,0x45,0x48,0x4c,0x4e,0x51,0x55,0x57,0x5a,0x5d,0x60,0x63,0x66 ,0x69,0x6c,0x6f,0x72,0x76,0x79,0x7c,0x80};
void delay(uchar z)
{
uint x,y;
for(x=z;x0;x--)
for(y=110;y0;y--);
}
void triangle_out() //三角波输出
{
DAdata=https://www.04ip.com/post/triangle_tab[wavecount];
if(wavecount64) wavecount=0;
DA_S1=0;//打开8位输入寄存器
DA_S1=1;//关闭8位输入寄存器
}
void sine_out()//正弦波输出
{
DAdata=https://www.04ip.com/post/sine_tab[wavecount];
DA_S1=0;//打开8位输入寄存器
DA_S1=1;//关闭8位输入寄存器
}
void square_out()//方波输出
{
judge=~judge;
if(judge==1) DAdata=https://www.04ip.com/post/0xff;
elseDAdata=https://www.04ip.com/post/0x00;
DA_S1=0;//打开8位输入寄存器
DA_S1=1;//关闭8位输入寄存器
}
/************1602液晶的相关函数*************/
#define lcd_ports P1
sbit rs=P2^2;
sbit rw=P2^3;
sbit lcden=P2^4;
void write_com(uchar com)
{
rs=0; //置零,表示写指令
lcden=0;
lcd_ports=com;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void write_date(uchar date)
{
rs=1; //置1,表示写数据(在指令所指的地方写数据)
lcden=0;
lcd_ports=date;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void disp_lcd(uchar addr,uchar *temp1)
{
uchar num;
write_com(addr);
delay(1);//延时一会儿???
for(num=0;num16;num)
{
write_date(temp1[num]);//或者这样写write_date(*(temp1 num));
delay(1);
}
}
void init_lcd()
{
//uchar num;
lcden=0;//可有可无???
rw=0;//初始化一定要设置为零 , 表示写数据
write_com(0x38);//使液晶显示点阵 , 为下面做准备
write_com(0x0c);//初始设置
write_com(0x06);//初始设置
write_com(0x01);//清零
write_com(0x80);//使指针指向第一行第一格
disp_lcd(0x80,lcd_hang1[3*16]);//在第一行显示
disp_lcd(0xc0,lcd_hang1[4*16]);//在第二行显示
}
/********************1602液晶函数声明结束*********************/
void main()
{
uchar i=0;
DA_S2=0;//使DAC寄存器处于直通状态
DAdata=https://www.04ip.com/post/0;
DA_S1=1;//关闭8位输入寄存器
init_lcd();
waveform=0;
TMOD=0x01;//设置定时器0为16位工作方式
IT0=1;//设置外部中断0为下降沿触发
ET0=1;//开定时器中断
EX0=1;
EA=1;
while(1)
{
//DAout(0xff);//可输出TTL波形
//DAout(0x80);
//T_temp=32;
【矩形波函数c语言怎么表示 矩形波的几个主要参数】 }
}
void timer0() interrupt 1
{
TH0=THtemp;
TL0=TLtemp;
if(waveform==0)sine_out();
else if(waveform==1) triangle_out();
else if(waveform==2) square_out();
}
void key_int0() interrupt 0
{
uchar keytemp;
uint total_freq; //总频率
EA=0; TR0=0;//关总中断与定时器
delay(5);//延时够吗???
if(key==0)//确实有按键按下而引发中断
{
keytemp=P30xf0; //获取P3口高四位的值
switch(keytemp)
{
case 0xe0: //选择波形
waveform;
if(waveform2) waveform=0;
break;
case 0xd0://频率按规定单位依次增加
wavefreq[waveform];
if(wavefreq[waveform]10) wavefreq[waveform]=1; // /*这边要用“10”,因为它比“=11”可靠
break;//性更高,使加数有个上限,不会一直加下去*/
case 0xb0://频率按规定单位依次衰减
wavefreq[waveform]--;
if(wavefreq[waveform]1) wavefreq[waveform]=10; //这边要用“1” , 因为它比“=0”可靠性更高
break;
case 0x70://TTL输出
DA_S2=1; //使DAC寄存器关闭
break;
}
THtemp=waveTH[waveform*10 (wavefreq[waveform]-1)]; //方括号中选取第几个数后 , 并把该值赋给T_temp
TLtemp=waveTL[waveform*10 (wavefreq[waveform]-1)];
total_freq= wavefreq[waveform] * freq_unit[waveform]; //求输出频率(个数*单位)
lcd_hang2[5]=total_freq 0x30;//在液晶中显示个位,(0x30 在液晶显示中表示数字0)
total_freq/=10; lcd_hang2[4]=total_freq 0x30; //在液晶中显示时十位
total_freq/=10; lcd_hang2[3]=total_freq 0x30; //在液晶中显示时百位
total_freq/=10; lcd_hang2[2]=total_freq 0x30; //在液晶中显示时千位
disp_lcd(0x80,lcd_hang1[waveform*16]);//在第一行显示
disp_lcd(0xc0,lcd_hang2);//在第二行显示
}
wavecount=0; //'抽点'计数清零
while(!key);
EA=1; TR0=1;//开启总中断与定时器
}
求助 , C语言中画矩形的函数是哪个?用lineto函数画矩形
#includegraphics.h
main()
{int gdriver=DETECT,gmode;
initgraph(gdriver,gmode,"c:\\tc");
cleardevice();
moveto(160,120);
lineto(480,120);
lineto(160,360);
lineto(160120);
getch();
closegraph();
}
图形和图像函数包含在graphics.h里面
rectangle() 画矩形函数
功能: 函数rectangle() 用当前绘图色、线型及线宽 , 画一个给定左上角与右下角的矩形(正方形或长方形) 。
用法: 此函数调用方式为void rectangle(int left,int top,int right,int bottom);
说明: 参数left,top是左上角点坐标,right,bottom是右下角点坐标 。如果有一个以上角点不在当前图形视口内,且裁剪标志clip设置的是真(1),那么调用该函数后 , 只有在图形视口内的矩形部分才被画出 。
这个函数对应的头文件为graphics.h
返回值: 无
例: 下面的程序画一些矩形实例:
#i ncludegraphics.h
void main()
{
int driver,mode;
driver=DETECT;
mode=0;
initgrpah(driver,mode,"");
rectangle(80,80,220,200);
rectangle(140,99,180,300);
rectangle(6,6,88,88);
rectangle(168,72,260,360);
getch();
restorecrtmode();
}
矩形波函数c语言怎么表示的介绍就聊到这里吧 , 感谢你花时间阅读本站内容,更多关于矩形波的几个主要参数、矩形波函数c语言怎么表示的信息别忘了在本站进行查找喔 。
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