c語言鋸齒波
『壹』 試用c語言編寫一個能輸出鋸齒波信號的單片機c51程序
程序加一個的LCD1602,你選擇使用
的#include <reg52.h>的/ /包含頭文件
?#包括<intrins.h>的
#定義UCHAR無符號的字元/ /宏定義臘清野
?#定義UINT無符號整數
?UCHAR I,J,N,Z,/ /定義全局變數
SBIT RS = P2 ^ 0; / /定義埠
?和SBIT RW = P2 ^ 1;
SBIT E = P2 ^ 2;
SBIT K = P2 ^ 7;
SBIT K1 = P2 ^ 6;
UCHAR代碼STR0 [] = {「正弦波」}; / /定義LCD1602顯示的字元數組
UCHAR代碼STR1 [] = {「三角波」};
UCHAR代碼字元串str2 [] = {「方波」};
?的UCHAR代碼表[3] [40] = / /定義的兩維陣列的波形
?{
??80H時,0x94的,0xa7,0xb9,0xca,0xd9,0xe7,0xf1,0XF8,是0xFD,
??是0xFD,0xff,則0XF8,0xf1,0xe7,0xd9,0xca,0xb9 0xa7,0x94的,
??80H時,0x6c,將0x55,0x46,0x35,$ 25,為0x18,0X0E,0X06,0X02,
??為0x00,0X02,0X06,0X0E,為0x18,$ 25,0x35,0x46,0x55??的,0x6c,
??80H時,0x8c,0x99,0xa6,0xb3,0XC0,含有0xCC,0xd9,0xe6,0xf2,
??為0xff,0xf2,0xe6,0xd9,輪喊含有0xCC,0XC0,0xb3,0xa6,0x99,0x8c,
??80H時,為0x73,0x66,0X5A,0x4d,0X40,地址0x33,0X26,0X1A,0X0D,
?為0x00,0X0D,0X1A,0X26,地址0x33,0X40,0x4d,為0x5A,0x66,為0x73,
??為0xff,0xff,則是0xFF,0xFF時,為0xff,0xff,則是0xFF,0xFF時,為0xff,0xff,則
??為0xff,0xff,則是0xFF,0xFF時,為0xff,0xff,則是0xFF,0xFF時,為0xff,0xff,則
??0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,
??0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00,0X00
?};
?無效延遲(UINT Z)/ /延時程序
?{
????(Z,Z> 0,Z - )
???
??
??}
?}
?無效Write_command「(UCHAR CMD)/ / LCD1602寫命令程序
?{
??RS = 0; / /選擇指令寄存器
?RW = 0; / /寫操作
?E = 1 / /使能端
?P1 = CMD;
?延遲時間(正和1);
?E = 0;
LCD1602是不是很忙?延遲(10); / /延時
?}
?無效WRITE_DATA(UCHAR CMD)/ / LCD1602寫入數據的命令
?{
??RS = 1; / /選擇數據寄存器
?RW = 0; / /寫操作
?E = 1; / /結束
?P1 = CMD;
?延遲時間(1);
?E = 0;
LCD1602是不是很忙?延遲(10); / /延時
?}
?的無效Lcd_init()/ / LCD1602初始化程序
?{
????Write_command(0x38); / /設置16 * 5 * 7點陣8位數據介面
?Write_command(0X0C)/ / LCD1602打開顯示,不顯示游標
?Write_command(0X06)/ /讀或寫一個字元指針加1不動
?Write_command(0X80 +0 X00); / /設置數據地址指針
?}
?無效顯示器()/ / LCD1602顯示英語課程
?{
????Lcd_init();
?(我== 0)
???
?組(n = 0,N <13,N +)
???
???WRITE_DATA(STR0 [N]);
??}
????}
?否則,如果(我== 1)
?{
?組(n = 0,N <13,N +)
??
??WRITE_DATA(STR1 [N]);
?}
?}
?其他
?{
?組(n = 0,N <13,N +)
??
??WRITE_DATA(字元串str2 [N]);
?}
?}
?}
無效的主要()/ /主函數
?{
???顯示();
?而(1)
?{
??中for(j = 0; J <40; + +)
???
???P0 =表[I] [J];
???
??}
(k == 0)/ /切換程序??
???
????延遲時間(1);
???(k == 0);
????
????(K == 0)
?????
????+ +;
????如果(i == 3)= 0;
???顯示();
????}
????
???}
??????而(k == 0);
??}
?}
?}
『貳』 at89c52產生三角波,鋸齒波,方波,要求用c語言寫,晶元是D0832
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
//#define Fosc 24000000/12000000 //12分頻後的頻率
#define DAdata P0//DA數據埠
sbit DA_S1= P2^0; // 控制DAC0832的8位輸入寄存器,僅當都為0時,可以輸出數據(處於直通狀態),否則,輸出將被鎖存
sbit DA_S2= P2^1; // 控制DAC0832的8位DAC寄存器,僅當都為0時,可以輸出數據(處於直通狀態),否則,輸出將被鎖存
sbit key= P3^2;
uchar wavecount; //'抽點'計數
uchar THtemp,TLtemp;//傳遞頻率的中間變數
//uint T_temp;
uchar judge=1; //在方波輸出函數中用於簡單判別作用
uchar waveform; //當其為0、1、2時,分別代表三種波
uchar code freq_unit[4]={10,50,200,10}; //三種波的頻率單位 sawtooth
uchar idata wavefreq[4]={1,1,1,1}; /枝裂/給每種波定義一個數組單元猛銷閉,用於存放單位頻率的個數
uchar code lcd_hang1[]={"Sine Wave " "Triangle Wave " "Square Wave " "sawtooth Wave ""Select Wave: " "press No.1 key! "};
uchar idata lcd_hang2[16]={"f= Hz "};
/*uchar code wave_freq_adjust[]={ //頻率調整中間值
0xff,0xb8,0x76,0x56,0x43,0x37,0x2e,0x26,0x20,0x1c, //正弦波頻率調整中間值
0xff,0x8e,0x5a,0x41,0x32,0x28,0x20,0x1b,0x17,0x0e,//三角波頻率調整中間值
0xff,0x8e,0x5a,0x41,0x32,0x28,0x20,0x1b,0x17,0x0e};
uint code wave_freq_adjust[]={ //頻率調整中間值
380,184,118,86,67,55,46,28,38,32,
295,142, 90,65,50,40,32,27,23,14,
295,142, 90,65,50,40,32,27,23,14}; */
/*uchar code waveTH[]={
0xfc,0xfe,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xfc,0xfe,0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};
uchar code waveTL[]={
0xf2,0x78,0xfb,0x3c,0x63,0x7d,0x8f,0x9d,0xa8,0xb1,
0x17,0x0b,0xb2,0x05,0x37,0x58,0x70,0x82,0x90,0x9b,
0x4d,0xa7,0xc4,0xd3,0xdc,0xe2,0xe6,0xea,0xec,0xee};*/
/***********這兩組數組很斗核重要,需要根據波形來調試,選擇合適的值,使輸出波形達到頻率要求************/
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, //正弦波頻率調整中間值
0xac,0xde,0x48,0x7a,0x99,0xaf,0xbb,0xc8,0xd0,0xde,//三角波頻率調整中間值
0x88,0x50,0x90,0x32,0x34,0xbe,0x4a,0xa3,0xe5,0x2c};
/*************************************************************************************************/
uchar code triangle_tab[]={ //每隔數字8,採取一次
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]={
//輸出電壓從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,
//輸出電壓從最大值到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,
//輸出電壓從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,
//輸出電壓從最小值到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};
uchar code sawtooth_tab[]={
0x00,0x02,0x04,0x06,0x08,0x0a,0x0c,0x0e,0x10,0x12,0x14,0x16,0x18,0x1a,0x1c,0x1e,0x20,0x22,0x24,0x26,0x28,0x2a,0x2c,0x2e,
0x30,0x32,0x34,0x36,0x38,0x3a,0x3c,0x3e,0x40,0x42,0x44,0x46,0x48,0x4a,0x4c,0x4e,0x50,0x52,0x54,0x56,0x58,0x5a,0x5c,0x5e,
0x60,0x62,0x64,0x66,0x68,0x6a,0x6c,0x6e,0x70,0x72,0x74,0x76,0x78,0x7a,0x7c,0x7e,0x80,0x82,0x84,0x86,0x88,0x8a,0x8c,0x8e};
//0x90,0x92,0x94,0x96,0x98,0x9a,0x9c,0x9e,0xa0,0xa2,0xa4,0xa6,0xa8,0xaa,0xac,0xae,0xb0,0xb2,0xb4,0xb6,0xb8,0xba,0xbc,0xbe,
//0xc0,0xc2,0xc4,0xc6,0xc8,0xca,0xcc,0xce,0xd0,0xd2,0xd4,0xd6,0xd8,0xda,0xdc,0xde,0xe0,0xe2,0xe4,0xe6,0xe8,0xea,0xec,0xee};
void delay(uchar z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void triangle_out()//三角波輸出
{
DAdata=triangle_tab[wavecount++];
if(wavecount>64) wavecount=0;
DA_S1=0; //打開8位輸入寄存器
DA_S1=1; //關閉8位輸入寄存器
}
void sine_out() //正弦波輸出
{
DAdata=sine_tab[wavecount++];
DA_S1=0; //打開8位輸入寄存器
DA_S1=1; //關閉8位輸入寄存器
}
void square_out() //方波輸出
{
judge=~judge;
if(judge==1) DAdata=0xff;
else DAdata=0x00;
DA_S1=0; //打開8位輸入寄存器
DA_S1=1; //關閉8位輸入寄存器
}
void sawtooth_out() //鋸齒波輸出
{
DAdata=sawtooth_tab[wavecount++];
if(wavecount>71) wavecount=0;
DA_S1=0; //打開8位輸入寄存器
DA_S1=1; //關閉8位輸入寄存器
}
/************1602液晶的相關函數*************/
#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,表示寫指令
lcden=0;
lcd_ports=com;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void write_date(uchar date)
{
rs=1;//置1,表示寫數據(在指令所指的地方寫數據)
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); //延時一會兒???
for(num=0;num<16;num++)
{
write_date(temp1[num]);//或者這樣寫write_date(*(temp1+num));
delay(1);
}
}
void init_lcd()
{
//uchar num;
lcden=0; //可有可無???
rw=0; //初始化一定要設置為零,表示寫數據
write_com(0x38); //使液晶顯示點陣,為下面做准備
write_com(0x0c); //初始設置
write_com(0x06); //初始設置
write_com(0x01); //清零
write_com(0x80); //使指針指向第一行第一格
disp_lcd(0x80,&lcd_hang1[4*16]); //在第一行顯示
disp_lcd(0xc0,&lcd_hang1[5*16]); //在第二行顯示
/*for(num=0;num<16;num++)
{
write_date(table[num]);
delay(5);
}
write_com(0x80+0x40); //給指針重新賦值,使之指向第二行第一格
for(num=0;num<16;num++)
{
write_date(table1[num]);
delay(5);
} */
/*TMOD=0x01; //選用定時方式1
TH0=(65536-50000)/256; //賦初值
TL0=(65536-50000)%256;//
EA=1;//開總中斷
ET0=1; //開定時器中斷
TR0=1; //啟動定時器*/
}
/********************1602液晶函數聲明結束*********************/
void main()
{
uchar i=0;
DA_S2=0; //使DAC寄存器處於直通狀態
DAdata=0;
DA_S1=1; //關閉8位輸入寄存器
init_lcd();
waveform=0;
TMOD=0x01; //設置定時器0為16位工作方式
IT0=1; //設置外部中斷0為下降沿觸發
ET0=1; //開定時器中斷
EX0=1;
EA=1;
while(1)
{
//DAout(0xff); //可輸出TTL波形
//DAout(0x80);
//T_temp=32;
}
}
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();
else if(waveform==3) sawtooth_out(); //tian jian
}
void key_int0() interrupt 0
{
uchar keytemp;
uint total_freq; //總頻率
EA=0; TR0=0; //關總中斷與定時器
delay(5); //延時夠嗎???
if(key==0) //確實有按鍵按下而引發中斷
{
keytemp=P3&0xf0; //獲取P3口高四位的值
switch(keytemp)
{
case 0xe0://選擇波形
waveform++;
if(waveform>3) waveform=0; //jiang 2 gai wei 3
break;
case 0xd0: //頻率按規定單位依次增加
wavefreq[waveform]++;
if(wavefreq[waveform]>10) wavefreq[waveform]=1; // /*這邊要用「>10」,因為它比「=11」可靠
break; // 性更高,使加數有個上限,不會一直加下去*/
case 0xb0: //頻率按規定單位依次衰減
wavefreq[waveform]--;
if(wavefreq[waveform]<1) wavefreq[waveform]=10; //這邊要用「<1」,因為它比「=0」可靠性更高
break;
case 0x70: //TTL輸出
DA_S2=1; //使DAC寄存器關閉
break;
}
THtemp=waveTH[waveform*10+(wavefreq[waveform]-1)]; //方括弧中選取第幾個數後,並把該值賦給T_temp
TLtemp=waveTL[waveform*10+(wavefreq[waveform]-1)];
total_freq= wavefreq[waveform] * freq_unit[waveform]; //求輸出頻率(個數*單位)
lcd_hang2[5]=total_freq%10+0x30; //在液晶中顯示個位,(0x30 在液晶顯示中表示數字0)
total_freq/=10; lcd_hang2[4]=total_freq%10+0x30; //在液晶中顯示時十位
total_freq/=10; lcd_hang2[3]=total_freq%10+0x30; //在液晶中顯示時百位
total_freq/=10; lcd_hang2[2]=total_freq%10+0x30; //在液晶中顯示時千位
disp_lcd(0x80,&lcd_hang1[waveform*16]); //在第一行顯示
disp_lcd(0xc0,lcd_hang2); //在第二行顯示
}
wavecount=0; //'抽點'計數清零
while(!key);
EA=1; TR0=1; //開啟總中斷與定時器
『叄』 單片機C語言數組賦值求助
uchar
你之前拍褲定義過嗎?你這是對數組賦值,而數組的賦值只有二種方法,一種是初始化賦值,它可以芹逗對數組整體賦值,即,你可以用uchar
frist[5]={xxxxx};
第二種就是在程序執行襲首簡中賦值,即,沒有經過初始化賦值;那麼此時對它的賦值只能是逐個賦值,而不能像初始化賦值那樣對整體來賦值了。你先定義了數組uchar
first
[5];即沒用有初始化賦值,所以是程序執行中的賦值,故只能逐個對它賦值了。即只能用first
[0]=a,first
[1]=b,這樣來賦值了。明白了吧,呵呵。