网站建设与开发英文文献,山东省建设协会网站首页,六安营销公司,网推啥意思文章目录 #xff08;1#xff09;DA转换#xff08;2#xff09;DAC0832简介#xff08;3#xff09;电路设计#xff08;4#xff09;参考例程#xff08;5#xff09;参考文献 #xff08;1#xff09;DA转换
单片机作为一个数字电路系统#xff0c;当需要采集… 文章目录 1DA转换2DAC0832简介3电路设计4参考例程5参考文献 1DA转换
单片机作为一个数字电路系统当需要采集外界模拟量的使用需要进行AD转换将模拟量转换成数字量供单片机使用。51单片机需要外部配置一个AD转换芯片来进行模拟量的采集如我之前写了一篇ADC0832的使用。高级的单片机如STC12和STM32已经集成了AD转换功能只需简单配置一下便可以采集到AD转换后的数据。
AD转换Analog to Digital是模拟量转换数字量那么DA转换Digital to Analog便是数字量转换成模拟量。 使用DAC0832进行数字到模拟的转换再使用定时器控制输出波形的频率便可以制作一个函数信号发生器。
2DAC0832简介 CS低电平有效片选输入线 WR1低电平大于500ms有效输入锁存器 WR2高电平有效与XFER结合可将输入锁存器的8位数据传输到DAC寄存器中 XFER低电平有效数据传输控制输入线 DI0~DI78位数据位并行输入有效时间大于90ns有效 VCC电源输入5V-15V VERF基准电压输入线-10V~10V RFB反馈信号输入可以看成一个反馈监测 IOUT1电流输出1其值随着输入线性变化 IOUT2电流输出2与OUT1值之和为一个常数
3电路设计
单片机最小系统 波形切换控制 这里由于博主时间有限例程代码的LED显示功能就没有写了 4参考例程
#include reg52.h
#define uchar unsigned char
#define uint unsigned int#define DI P0 //8位数据输入线//sbit sine_wave_LED1 P1^0; //正弦波指示灯
//sbit square_wave_LED2 P1^1; //方波指示灯
//sbit triangular_wave_LED3 P1^2; //三角波指示灯
//sbit sawtooth_wave_LED4 P1^3; //锯齿波指示灯
sbit change_wave_Key P1^4; //更换波形uint freq 3906; //定时数值×16^(-6)×256 波形频率 例程使用1KHZ
uint number1,n0,THHL,i;//正弦波段码
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 };
//三角波段码
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 }; //方波段码
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 };//10ms延时函数
void delay_10ms(uchar i)
{//毫秒级延时函数//在12MHZ下晶振下大约延时10ms/次uchar a,b,c;for(c i; c 0; --c)for(b 129; b 0; b--)for(a 38; a 0; a--);
}//定时器0初始化
void Timer0Init(void)
{unsigned int THHL;TMOD 0xF0; //定时器1失效TMOD | 0x01; //定时器016位计数THHL65536-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ET01; //开定时器0中断EA1; //开总中断PT00; //定时器0中断最优
}void main()
{/*指示灯初始化全部熄灭*/
// triangular_wave_LED3 1;
// square_wave_LED2 1;
// sine_wave_LED1 1;Timer0Init();//初始化定时器0while(1){if(change_wave_Key 0){delay_10ms(1);//延时消抖if(change_wave_Key 0){while(!change_wave_Key);//松手检测number;if(number 5){number 0;}}}switch(number){case 1: {DIsin[n]; break;}//正弦波case 2: {DIthr[n]; break;}//三角波case 3: {for(i0;i256;i){DIsqu[i];} break;}//方波case 4: {DI256-n; break;}//锯齿波default:{break;}}}
}//定时器0中断处理函数
void Timer0_Routine() interrupt 1
{THHL65536-freq;TL0THHL%256;TH0THHL/256; if(n255) {n0;} else {n;}
}
电路仿真及代码例程 链接https://share.weiyun.com/ALLrnKTu 密码cchvph
5参考文献
基于51单片机的DAC0832波形发生器
由于作者水平有限如有错误望指摘。
