WR为P3.6 CS为P2.0 实现由DAC0832输出波形,可在正弦波、三角波、方波、锯齿波之间切换。
时间: 2024-03-22 08:40:04 浏览: 76
DAC0832在Proteus中软件仿真生成波形(矩形-三角-锯齿-正弦).docx
下面是一个基本的C语言程序,可以通过DAC0832芯片输出正弦波、三角波、方波和锯齿波。程序使用P3.6作为WR引脚,使用P2.0作为CS引脚。液晶1602用于显示输出波形的类型。请注意,此程序仅提供基本的框架和算法,您可能需要对其进行修改以适应您的具体硬件和应用场景。
```c
#include <reg52.h>
#define CS P2_0
#define WR P3_6
#define LCD_RS P2_1
#define LCD_RW P2_2
#define LCD_EN P2_3
#define LCD_DATA P0
void delay(unsigned int t);
void lcd_init();
void lcd_write_cmd(unsigned char cmd);
void lcd_write_data(unsigned char dat);
void dac0832_write(unsigned char dat);
void sin_wave();
void triangle_wave();
void square_wave();
void saw_wave();
void main()
{
lcd_init();
while(1)
{
sin_wave();
delay(5000);
triangle_wave();
delay(5000);
square_wave();
delay(5000);
saw_wave();
delay(5000);
}
}
void sin_wave()
{
unsigned char i, data;
unsigned int angle;
lcd_write_cmd(0x80);
lcd_write_data('S');
lcd_write_data('I');
lcd_write_data('N');
lcd_write_data('E');
lcd_write_data('W');
lcd_write_data('A');
lcd_write_data('V');
lcd_write_data('E');
for(i = 0; i < 256; i++)
{
angle = i * 3.14159 / 128;
data = 128 + 127 * sin(angle);
dac0832_write(data);
delay(1);
}
}
void triangle_wave()
{
unsigned char i, data;
lcd_write_cmd(0x80);
lcd_write_data('T');
lcd_write_data('R');
lcd_write_data('I');
lcd_write_data('A');
lcd_write_data('N');
lcd_write_data('G');
lcd_write_data('L');
lcd_write_data('E');
for(i = 0; i < 128; i++)
{
data = i;
dac0832_write(data);
delay(10);
}
for(i = 128; i < 256; i++)
{
data = 256 - i;
dac0832_write(data);
delay(10);
}
}
void square_wave()
{
unsigned char i, data;
lcd_write_cmd(0x80);
lcd_write_data('S');
lcd_write_data('Q');
lcd_write_data('U');
lcd_write_data('A');
lcd_write_data('R');
lcd_write_data('E');
lcd_write_data('W');
lcd_write_data('A');
lcd_write_data('V');
for(i = 0; i < 128; i++)
{
data = 0;
dac0832_write(data);
delay(10);
}
for(i = 128; i < 256; i++)
{
data = 255;
dac0832_write(data);
delay(10);
}
}
void saw_wave()
{
unsigned char i, data;
lcd_write_cmd(0x80);
lcd_write_data('S');
lcd_write_data('A');
lcd_write_data('W');
lcd_write_data('W');
lcd_write_data('A');
lcd_write_data('V');
lcd_write_data('E');
for(i = 0; i < 256; i++)
{
data = i;
dac0832_write(data);
delay(10);
}
}
void dac0832_write(unsigned char dat)
{
unsigned char i;
CS = 0;
for(i = 0; i < 8; i++)
{
if(dat & 0x80)
{
P1 = 1;
}
else
{
P1 = 0;
}
WR = 0;
WR = 1;
dat <<= 1;
}
CS = 1;
}
void delay(unsigned int t)
{
unsigned int i, j;
for(i = 0; i < t; i++)
{
for(j = 0; j < 114; j++);
}
}
void lcd_init()
{
lcd_write_cmd(0x38);
lcd_write_cmd(0x0c);
lcd_write_cmd(0x06);
lcd_write_cmd(0x01);
}
void lcd_write_cmd(unsigned char cmd)
{
LCD_RS = 0;
LCD_RW = 0;
LCD_DATA = cmd;
LCD_EN = 1;
delay(1);
LCD_EN = 0;
}
void lcd_write_data(unsigned char dat)
{
LCD_RS = 1;
LCD_RW = 0;
LCD_DATA = dat;
LCD_EN = 1;
delay(1);
LCD_EN = 0;
}
```
请注意,此程序中的函数和宏定义可能需要根据您的具体硬件和应用场景进行修改。例如,您可能需要将P3.6和P2.0更改为适合您的单片机引脚。此外,由于DAC0832输出的是模拟信号,您还需要将其连接到适当的电路(如RC滤波器)以获得平滑的波形输出。
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