基于51单片机的DAC0832波形发生器
输出1HZ正弦波、三角波、方波、锯齿波
使用LCD1602显示
DAC0832的D0~D7数据输入口,IOUT1、IOUT2互补输出口,RFB反馈端口、
VREF基准电压值(一般是5V)。用定时器控制段码表输出速度来控制波形的频率。
(定时数值)*10^(-6)*256=波形频率。
(1)锯齿波的实现原理: 锯齿波的实现过程是首先定义一个初值然后进行加法操 作, 加的步数的多少则根据要求的频率来进行。然后加到某个数之后就再重新设置为初 值, 再重复执行刚刚的操作, 如此循环下去。在本程序中初值为 00H,最大值为 FFH。
(2)三角波的实现原理: 三角波的实现是设置一个初值, 然后进行加数, 同样是加 到某个数之后再进行减数, 减到初值之后就再返回到先前的操作。此程序输入的 VREF 的电压是+5V,因此该波形输出的最大频率是初值为 00H 和最终值为 FFH,且步数为 1,这样输出的波形是最大的。
(3)方波的实现原理: 此波形的实现只需开始的时候设置一个初值然后直接输出 这个值就行了, 输出一段时间后, 然后再重新置一个数据, 然后再输出这个数据一段时 间, 但是此时的时间一定要等于前面那段时间。这样才是一个方波, 如果两个时间不相 同,那就相当于一个脉冲波了。
主函数和中断服务函数
#include <REGX52.H>
#include <Delay.h>
#include <LCD1602.h>
#include <data.h>
#include "Timer0.h"
#define BO P3
#define KEY0 P1_0
#define KEY1 P1_1
#define KEY2 P1_2
#define KEY3 P1_3
#define KEY4 P1_4
unsigned int Number=1,Signal_chose=0,n=0,THHL,x,i;
unsigned int freq=3906;
void main()
{ Timer0Init();LCD_Init();while(1){// if(KEY4==0)
// {
// Delay(20);
// while(KEY4==0);
// Delay(20);
// freq=freq/10;
// Number=Number*10;
// }if(KEY0==0){TF0 = 0;LCD_ShowString(1,1,"sin:");LCD_ShowString(2,1,"FREQ:");LCD_ShowNum(2,8,Number,3);LCD_ShowString(2,11,"Hz");TR0 = 1;Signal_chose=0;}if(KEY1==0){TF0 = 0;LCD_ShowString(1,1,"squ:");LCD_ShowString(2,1,"FREQ:");LCD_ShowNum(2,8,000,3);LCD_ShowString(2,11,"Hz");TR0 = 1;Signal_chose=2;}if(KEY2==0){TF0 = 0;LCD_ShowString(1,1,"thr:");LCD_ShowString(2,1,"FREQ:");LCD_ShowNum(2,8,Number,3);LCD_ShowString(2,11,"Hz");TR0 = 1;Signal_chose=1;}if(KEY3==0){TF0 = 0;LCD_ShowString(1,1,"jch:");LCD_ShowString(2,1,"FREQ:");LCD_ShowNum(2,8,Number,3);LCD_ShowString(2,11,"Hz");TR0 = 1;Signal_chose=3;}switch(Signal_chose) { case 0: {BO=sin[n]; break;} //正弦波case 1: {BO=thr[n]; break;} //三角波case 2: {for(i=0;i<256;i++){BO=squ[i];}break;} //方波case 3: {BO=256-n; break;} //锯齿波default:{break;} }}
}void Timer0_Routine() interrupt 1
{THHL=65536-freq;//(freq=3906)*10^(-6)*256=1HzTL0=THHL%256;TH0=THHL/256; if(n>=255) {n=0;} else {n++;}
}
LCD显示函数
#include <REGX52.H>
//引脚配置:
sbit LCD_RS=P2^0;
sbit LCD_RW=P2^1;
sbit LCD_EN=P2^2;
#define LCD_DataPort P0//函数定义:
/*** @brief LCD1602延时函数,12MHz调用可延时1ms* @param 无* @retval 无*/
void LCD_Delay()
{unsigned char i, j;i = 2;j = 239;do{while (--j);} while (--i);
}/*** @brief LCD1602写命令* @param Command 要写入的命令* @retval 无*/
void LCD_WriteCommand(unsigned char Command)
{LCD_RS=0;LCD_RW=0;LCD_DataPort=Command;LCD_EN=1;LCD_Delay();LCD_EN=0;LCD_Delay();
}/*** @brief LCD1602写数据* @param Data 要写入的数据* @retval 无*/
void LCD_WriteData(unsigned char Data)
{LCD_RS=1;LCD_RW=0;LCD_DataPort=Data;LCD_EN=1;LCD_Delay();LCD_EN=0;LCD_Delay();
}/*** @brief LCD1602设置光标位置* @param Line 行位置,范围:1~2* @param Column 列位置,范围:1~16* @retval 无*/
void LCD_SetCursor(unsigned char Line,unsigned char Column)
{if(Line==1){LCD_WriteCommand(0x80|(Column-1));}else if(Line==2){LCD_WriteCommand(0x80|(Column-1+0x40));}
}/*** @brief LCD1602初始化函数* @param 无* @retval 无*/
void LCD_Init()
{LCD_WriteCommand(0x38);//八位数据接口,两行显示,5*7点阵LCD_WriteCommand(0x0c);//显示开,光标关,闪烁关LCD_WriteCommand(0x06);//数据读写操作后,光标自动加一,画面不动LCD_WriteCommand(0x01);//光标复位,清屏
}/*** @brief 在LCD1602指定位置上显示一个字符* @param Line 行位置,范围:1~2* @param Column 列位置,范围:1~16* @param Char 要显示的字符* @retval 无*/
void LCD_ShowChar(unsigned char Line,unsigned char Column,char Char)
{LCD_SetCursor(Line,Column);LCD_WriteData(Char);
}/*** @brief 在LCD1602指定位置开始显示所给字符串* @param Line 起始行位置,范围:1~2* @param Column 起始列位置,范围:1~16* @param String 要显示的字符串* @retval 无*/
void LCD_ShowString(unsigned char Line,unsigned char Column,char *String)
{unsigned char i;LCD_SetCursor(Line,Column);for(i=0;String[i]!='\0';i++){LCD_WriteData(String[i]);}
}/*** @brief 返回值=X的Y次方*/
int LCD_Pow(int X,int Y)
{unsigned char i;int Result=1;for(i=0;i<Y;i++){Result*=X;}return Result;
}/*** @brief 在LCD1602指定位置开始显示所给数字* @param Line 起始行位置,范围:1~2* @param Column 起始列位置,范围:1~16* @param Number 要显示的数字,范围:0~65535* @param Length 要显示数字的长度,范围:1~5* @retval 无*/
void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{unsigned char i;LCD_SetCursor(Line,Column);for(i=Length;i>0;i--){LCD_WriteData(Number/LCD_Pow(10,i-1)%10+'0');}
}/*** @brief 在LCD1602指定位置开始以有符号十进制显示所给数字* @param Line 起始行位置,范围:1~2* @param Column 起始列位置,范围:1~16* @param Number 要显示的数字,范围:-32768~32767* @param Length 要显示数字的长度,范围:1~5* @retval 无*/
void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length)
{unsigned char i;unsigned int Number1;LCD_SetCursor(Line,Column);if(Number>=0){LCD_WriteData('+');Number1=Number;}else{LCD_WriteData('-');Number1=-Number;}for(i=Length;i>0;i--){LCD_WriteData(Number1/LCD_Pow(10,i-1)%10+'0');}
}/*** @brief 在LCD1602指定位置开始以十六进制显示所给数字* @param Line 起始行位置,范围:1~2* @param Column 起始列位置,范围:1~16* @param Number 要显示的数字,范围:0~0xFFFF* @param Length 要显示数字的长度,范围:1~4* @retval 无*/
void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{unsigned char i,SingleNumber;LCD_SetCursor(Line,Column);for(i=Length;i>0;i--){SingleNumber=Number/LCD_Pow(16,i-1)%16;if(SingleNumber<10){LCD_WriteData(SingleNumber+'0');}else{LCD_WriteData(SingleNumber-10+'A');}}
}/*** @brief 在LCD1602指定位置开始以二进制显示所给数字* @param Line 起始行位置,范围:1~2* @param Column 起始列位置,范围:1~16* @param Number 要显示的数字,范围:0~1111 1111 1111 1111* @param Length 要显示数字的长度,范围:1~16* @retval 无*/
void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length)
{unsigned char i;LCD_SetCursor(Line,Column);for(i=Length;i>0;i--){LCD_WriteData(Number/LCD_Pow(2,i-1)%2+'0');}
}
定时器配置函数
#include <REGX52.H>
extern unsigned int freq;void Timer0Init(void)
{unsigned int THHL;TMOD &= 0xF0; //设置定时器模式TMOD |= 0x01; //设置定时器模式THHL=65536-freq;TL0 =THHL%256; //设置定时初值TH0 =THHL/256; //设置定时初值TF0 = 0; //清除TF0标志TR0 = 1; //定时器0开始计时ET0=1;EA=1;PT0=0;
}
波形段码表
#ifndef _DATA_H
#define _DATA_H
unsigned code sin[256]={ 0x80,0x83,0x85,0x88,0x8A,0x8D,0x8F,0x92, 0x94,0x97,0x99,0x9B,0x9E,0xA0,0xA3,0xA5, 0xA7,0xAA,0xAC,0xAE,0xB1,0xB3,0xB5,0xB7, 0xB9,0xBB,0xBD,0xBF,0xC1,0xC3,0xC5,0xC7, 0xC9,0xCB,0xCC,0xCE,0xD0,0xD1,0xD3,0xD4, 0xD6,0xD7,0xD8,0xDA,0xDB,0xDC,0xDD,0xDE, 0xDF,0xE0,0xE1,0xE2,0xE3,0xE3,0xE4,0xE4, 0xE5,0xE5,0xE6,0xE6,0xE7,0xE7,0xE7,0xE7, 0xE7,0xE7,0xE7,0xE7,0xE6,0xE6,0xE5,0xE5, 0xE4,0xE4,0xE3,0xE3,0xE2,0xE1,0xE0,0xDF, 0xDE,0xDD,0xDC,0xDB,0xDA,0xD8,0xD7,0xD6, 0xD4,0xD3,0xD1,0xD0,0xCE,0xCC,0xCB,0xC9, 0xC7,0xC5,0xC3,0xC1,0xBF,0xBD,0xBB,0xB9, 0xB7,0xB5,0xB3,0xB1,0xAE,0xAC,0xAA,0xA7, 0xA5,0xA3,0xA0,0x9E,0x9B,0x99,0x97,0x94, 0x92,0x8F,0x8D,0x8A,0x88,0x85,0x83,0x80, 0x7D,0x7B,0x78,0x76,0x73,0x71,0x6E,0x6C, 0x69,0x67,0x65,0x62,0x60,0x5D,0x5B,0x59, 0x56,0x54,0x52,0x4F,0x4D,0x4B,0x49,0x47, 0x45,0x43,0x41,0x3F,0x3D,0x3B,0x39,0x37, 0x35,0x34,0x32,0x30,0x2E,0x2D,0x2C,0x2A, 0x29,0x28,0x26,0x25,0x24,0x23,0x22,0x21, 0x20,0x1F,0x1E,0x1D,0x1D,0x1C,0x1C,0x1B, 0x1B,0x1A,0x1A,0x1A,0x19,0x19,0x19,0x19, 0x19,0x19,0x19,0x19,0x1A,0x1A,0x1A,0x1B, 0x1B,0x1C,0x1C,0x1D,0x1D,0x1E,0x1F,0x20, 0x21,0x22,0x23,0x24,0x25,0x26,0x28,0x29, 0x2A,0x2C,0x2D,0x2F,0x30,0x32,0x34,0x35, 0x37,0x39,0x3B,0x3D,0x3F,0x41,0x43,0x45, 0x47,0x49,0x4B,0x4D,0x4F,0x52,0x54,0x56, 0x59,0x5B,0x5D,0x60,0x62,0x65,0x67,0x69, 0x6C,0x6E,0x71,0x73,0x76,0x78,0x7B,0x7D };
unsigned code thr[256]={ 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97, 0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7, 0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7, 0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, 0xBF,0xBE,0xBD,0xBC,0xBB,0xBA,0xB9,0xB8, 0xB7,0xB6,0xB5,0xB4,0xB3,0xB2,0xB1,0xB0,0xAF,0xAE,0xAD,0xAC,0xAB,0xAA,0xA9,0xA8, 0xA7,0xA6,0xA5,0xA4,0xA3,0xA2,0xA1,0xA0, 0x9F,0x9E,0x9D,0x9C,0x9B,0x9A,0x99,0x98, 0x97,0x96,0x95,0x94,0x93,0x92,0x91,0x90, 0x8F,0x8E,0x8D,0x8C,0x8B,0x8A,0x89,0x88, 0x87,0x86,0x85,0x84,0x83,0x82,0x81,0x80, 0x7F,0x7E,0x7D,0x7C,0x7B,0x7A,0x79,0x78, 0x77,0x76,0x75,0x74,0x73,0x72,0x71,0x70, 0x6F,0x6E,0x6D,0x6C,0x6B,0x6A,0x69,0x68, 0x67,0x66,0x65,0x64,0x63,0x62,0x61,0x60, 0x5F,0x5E,0x5D,0x5C,0x5B,0x5A,0x59,0x58, 0x57,0x56,0x55,0x54,0x53,0x52,0x51,0x50, 0x4F,0x4E,0x4D,0x4C,0x4B,0x4A,0x49,0x48, 0x47,0x46,0x45,0x44,0x43,0x42,0x41,0x40, 0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47, 0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F, 0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57, 0x58,0x59,0x5A,0x5B,0x5C,0x5D,0x5E,0x5F, 0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67, 0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F, 0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77, 0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F };
unsigned code squ[256]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff };#endif
显示部分功能代码来源某站UP主,仿真结果
基于51单片机的DAC0832波形发生器相关推荐
- 51单片机c语言dac0832产生波形,基于51单片机的DAC0832波形发生器设计
波形发生器是一种常用的信号源,广泛的应用于电子电路.自动控制系统和教学实验等领域,是现代测试领域内应用最为广泛的通用仪器之一.在研制.生产.测试和维修各种电子元件.部件以及整机设备时,都需要有信号源. ...
- 33220a 编程C语言,基于AT89C51单片机的数字式波形发生器(非常完整).doc
摘要 本系统是基于AT89C51单片机的数字式波形发生器.采用AT89C51单片机作为控制核心,外围采用数字/模拟转换电路(DAC0832).运放电路(LM324).按键和LCD(1602)等.通过按 ...
- 基于51单片机可调PWM发生器
源码:基于51单片机可调PWM发生器 一.设计任务 PWM信号频率范围为20Hz ~ 100kHz 占空比为5%~95% 键盘设置PWM频率和占空比 液晶模块显示输出频率和占空比 二.硬件设计 1.硬 ...
- 基于51单片机的函数/波形信号发生器
1.本设计基于STC89C51/52(与AT89S51/52.AT89C51/52通用,可任选)单片机 2.LCD1602液晶显示波形种类和频率值(10-100HZ). 3.按键设置波形种类和设定频率 ...
- 89c51汇编语言波形发生器,51单片机汇编语言实现波形发生器
组织0000小时 LJMP启动 组织0050H 开始3330 JNB 1.0,J100 JNB P1.1,J101 JNB P1.2,J102 JNB P1.3,J103 LJMP启动 J100: m ...
- 基于单片机超声波视力保护系统设计-基于51单片机8音键电子琴仿真设计-基于8086八路模拟信号采集均值显示系统设计-基于8086八路数据电压温度采集系统-基于8086波形发生器仿真设计【毕设课设分享】
539基于单片机超声波视力保护系统设计-设计资料 硬件构成:单片机+最小系统+LCD1602液晶显示模块+超声波模块+DS18B20温度采集模块+光线检测模块+ADC0832模块+蜂鸣器模块+LED指 ...
- 【51毕业设计案例】【006】波形发生器(正弦波、矩形波、三角波、锯齿波)-基于51单片机
功能介绍: 1.输出 正弦波.矩形波.三角波.锯齿波 波形 2.设定波形输出频率 3.设定修改频率的步进值 整体功能简述: 通过按键可以修改输出的波形,一共可以输出四种波形,分别是:正弦波.矩形波.三 ...
- 基于51单片机的波形发生器(四种波形)(毕业设计资料)
四种波形的产生,包括锯齿波.三角波.方波.正弦波.通过LCD液晶显示当前波形以及波形的频率.可以通过按键切换波形,并可以通过按键进行设置当前波形的频率大小,也可以设置频率设置不步进值.资料从主页链接中 ...
- 单片机课设基于51单片机的波形发生器(公开资源)(四种波形)(同时输出两种波形)
单片机课设-波形发生器 前言 一.课设任务是什么? 二.如何解决这几个任务? 三.仿真原理图 四.代码 4.1 LCD1602代码 4.2 波形输出以及8*8点阵显示代码 4.3 波形选择 五.仿真源 ...
最新文章
- PostgreSQL入门,PostgreSQL和mysql
- 部署Nagios监控系统(一)
- 工业机器人几个自由度_取件冲压上下料机械手和六自由度工业机器人805A
- 30岁自学python找工作-程序员自学Python开发,20到30岁几乎决定了你的未来!
- HTTP权威指南阅读笔记五:Web服务器
- [Linux]history 显示命令执行的时间
- Android 动画(一)
- java的css的块_CSS块宽度不大于前一个块
- python基础教程--代码集合(下)
- 如何在mac上编写java程序_在mac系统上安装Eclipse,编写java程序
- 程序员面试的 3 大反面案例!看灯大侠最可怜!
- 程序读取计算机设备管理器中各设备的状态(启用/禁用)?(转自大富翁)
- spring多个AOP执行先后顺序(面试问题:怎么控制多个aop的执行循序)
- Linux添加相对库路径,Linux C编程(8) 使用相对路径加载动态库-rpath和$ORIGIN
- C#中对 XML节点进行增、删、改、查
- fence_ilo can't connect by ssl, since CentOS 5.8 lack pyOpenSSL
- Java等额本息算法实现
- 4K图片(壁纸)免费下载网站【实用】
- HDFS—Web页面操作
- 类似直播App的向右滑动清屏功能
热门文章
- python里的英文歌叫什么_Python告诉你:从《入海》到《消愁》毛不易的歌里都在唱些什么?...
- C语言 剧情版小游戏
- 微信小程序+.NET(十一) 小程序之小说阅读器实现
- 在Java中用正则表达式判断一个字符串是否是数字的方法
- Spring 通过 @Lazy 注解解决构造方法循环依赖问题
- Weex Android 动画揭秘
- 算法应该怎么“玩”?
- java实现处理无限层级树形结构
- C语言中用单引号括起多个字符的问题
- C盘瘦身:QQ文件的清理及Group2文件夹