牛人制作的单片机科学型计算器，功能太强大大家一起欣赏

ID:163090 · 发表于 2020-4-3 17:46

以下是计算器功能演示视频地址：
https://www.bilibili.com/video/B ... 3625234719827099345

制作出来的实物图如下：

以下是部分单片机程序代码：
完整代码在附件中

#include "STC12C5A60S2.h"
#include "alg_caculate.h"
#include "UART.h"
#include "alg_linearlist.h"
#include "keyboard_input.h"
#include "lcd_12864.h"
#include "mode.h"
#include "solve_equation.h"
#include "function_pic.h"
#include "eeprom_rw.h"
#include "pwm.h"
#include "time.h"

#include <stdio.h>
#include <stdlib.h>

#define uchar unsigned char
#define uint unsigned int

uchar num0;                //输入的键值
int       count1;    //翻页计数

void main()
{
      PWM_init();
      t0_init();
      t1_init();
      lcd_init();
      lcd_clear_pic();
      while(1)
      {


      mode_select();

      }

}

全部资料51hei下载地址：

计算器正式版Ver1.0.0.7z (545.05 KB, 下载次数: 339)

ID:163090 · 发表于 2020-4-3 17:48

计算器主控芯片为STC12C5A60S2，显示器为12864液晶。额外的外设有EEPROM、DS1302、矩阵键盘，为科学计算器提供存储、时钟、输入功能。在等号被按下前，允许输入完整的表达式。因此在软件上需要做到语法识别、优先级顺序、括号嵌套等功能。计算器拥有普通计算(表达式与函数识别、计算)、计算结果存储/回看、复数计算、矩阵运算、函数图形、解方程、统计、最小二乘法求回归直线、一阶常微分方程、单位，进制转换、定积分、求导等功能。有节电模式，5分钟不输入自动关机，液晶屏亮度5级可调。

ID:163090 · 发表于 2020-4-3 17:48

计算器主控芯片为STC12C5A60S2，显示器为12864液晶。额外的外设有EEPROM、DS1302、矩阵键盘，为科学计算器提供存储、时钟、输入功能。
在等号被按下前，允许输入完整的表达式。因此在软件上需要做到语法识别、优先级顺序、括号嵌套等功能。
计算器拥有普通计算(表达式与函数识别、计算)、计算结果存储/回看、复数计算、矩阵运算、函数图形、解方程、统计、最小二乘法求回归直线、一阶常微分方程、单位，进制转换、定积分、求导等功能。
有节电模式，5分钟不输入自动关机，液晶屏亮度5级可调。

ID:163090 · 发表于 2020-4-3 18:03

没有电路图，系统按键部分电路需要自己根据按键模块程序来进行分析反推硬件电路应该如何连接。矩阵按键有8行5列，一共是40个按键，按照程序的意思好像是电路图如下图所示：

以下是按键输入部分电路程序：

#include "STC12C5A60S2.h"
#include <intrins.h>
#include "keyboard_device.h"
#include "lcd_12864.h"
#include "eeprom_rw.h"
#include "mode.h"
#include "pwm.h"
#define uchar unsigned char
#define uint unsigned int

uchar shift=0;//shift键
void keyboard_cursor_flash(void);

extern bit gb_flag;
extern uchar flash_count;
extern uchar count;
extern uchar hang;

extern uint time_out;

uchar code welcome_pic[]={
/*--  调入了一幅图像：boeing.bmp  --*/
/*--  宽度x高度=128x64  --*/
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,
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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,
0x00,0x00,0x07,0xFF,0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x7E,0x1F,0xC7,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0xFC,0x0F,0xE1,0xFC,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x01,0xFC,0x07,0xE0,0xFE,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF0,0x7F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF0,0x7F,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF0,0x3F,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF0,0x3F,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF0,0x3F,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF0,0x3F,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x0F,0xE0,0x3F,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF9,0x9F,0xE0,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF9,0xFF,0xFF,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF9,0xFF,0xFF,0xBF,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF9,0x1F,0xE0,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x0F,0xF0,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF0,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF0,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF8,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF8,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF8,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF8,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF8,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF0,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xF8,0x07,0xF0,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xFC,0x07,0xE0,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xFE,0x0F,0xC0,0x3F,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x03,0xFF,0xFF,0x80,0x7F,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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,
};

/* ========= 延时20ms11.0592MHz ========= */
void delay_20m(void) //消抖用延时
{
unsigned char i, j, k;

i = 1;
j = 216;
k = 35;
do
{
do
{
while (--k);
} while (--j);
} while (--i);
}

/* ========= 延时2s11.0592MHz ========= */
void delay_2s(void) //退出刷屏用延时
{
unsigned char i, j, k;

i = 64;
j = 9;
k = 179;
do
{
do
{
while (--k);
} while (--j);
} while (--i);
}

/* ========= 键盘扫描 ========= */
uchar keyboard(void)
{
uchar code keyboard_Scan[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f}; //键盘扫描库
//11111110,11111101,11111011,11110111,11101111,11011111,10111111,01111111
uchar i, j, pc, flag = 0;
uchar XScan=0;
uchar in = 0;
uchar test;
while(in == 0)
{
#ifdef KEY_X_IS_HIGH
KEY_X &= 0x07; //清空高5位    0000 0111
XScan = 0x80; //    1000 0000
// XScan = 0x08;
#endif
// #ifdef KEY_X_IS_LOW
// KEY_X &= 0xe0; //清空低5位    1110 0000
// XScan = 0x01; //    0000 0001
// #endif
for(i=0;i<5;i++)
{
KEY_X &=0x07;

test = XScan;
test = ~test;

KEY_X = test & 0xf8 ;
KEY_X = KEY_X | test;    //KEY_X接高八位

KEY_Y = 0xff; //置高
if(0xff != (pc = KEY_Y)) //假如说有按键按下
{
if(0xff != (pc = KEY_Y)) //假如说有按键按下
{
delay_20m();
for(j=0;j<8;j++)
{ //将扫描值与扫描按键值比较
if( pc == keyboard_Scan[j] )
{
in = j * 5 + i +1;
flag = 1;
}

if(flag == 1)
{
while( KEY_Y == keyboard_Scan[j] ); //松手检测
delay_20m();
break;
}

}
}
if(flag == 1)
break;
}
XScan >>= 1; //左移一位
}

keyboard_cursor_flash();

}
time_out = 0; //清空计时
return in;
}

uchar keyboard_wake(void)
{
uchar i, pc, flag = 0;
uchar XScan=0;
uchar in = 0;
uchar test;

#ifdef KEY_X_IS_HIGH
KEY_X &= 0x07; //清空高5位    0000 0111
XScan = 0x80; //    1000 0000
// XScan = 0x08;
#endif
// #ifdef KEY_X_IS_LOW
// KEY_X &= 0xe0; //清空低5位    1110 0000
// XScan = 0x01; //    0000 0001
// #endif
for(i=0;i<5;i++)
{
KEY_X &=0x07;

test = XScan;
test = ~test;

KEY_X = test & 0xf8 ;
KEY_X = KEY_X | test;    //KEY_X接高八位

KEY_Y = 0xff; //置高
if(0xff != (pc = KEY_Y)) //假如说有按键按下
{
return 1;
}
XScan >>= 1; //左移一位
}
return 0;
}

/* ========= 光标闪烁 ========= */
void keyboard_cursor_flash(void)
{

if(flash_count>=10)
{
if(gb_flag==0)
{
lcd_yline(8*(count-1),16*hang+0,16*hang+15,1);
gb_flag=1;
}
else
{
lcd_yline(8*(count-1),16*hang+0,16*hang+15,0);
gb_flag=0;
}
flash_count=0;
}
//键盘空闲监控
if(byte_read(ADD_TIMEOUT, 0)<time_out/5600)
{
time_out = 0;
mode_sleep();
}
}

uchar keyboard_output()
{
uchar result = keyboard();
uchar num0=0xff;
switch( result )
{
case 1:
shift=~shift;

num0 = 0 ;
break;
case 4:
//上翻
num0 = 3 ;
break;
case 6:
num0 = '(';
break;
case 7:
num0 = ')';
break;
case 8:
//地址左移一位
num0 = 5 ;
break;
case 9:
//下翻
num0 = 6 ;
break;
case 10:
//地址右移一位
num0 = 7 ;
break;
case 17:
//hyp?
num0 = 14 ;
break;
//数字键
case 36:
num0='0';
break;

case 31:
//lcd_write_str("1");
num0 = '1';
break;
case 32:
//lcd_write_str("2");
num0 = '2';
break;
case 33:
//lcd_write_str("3");
num0 = '3';
break;

case 26:
num0='4';
break;
case 27:
num0='5';
break;
case 28:
num0='6';
break;
case 21:
num0='7';
break;
case 22:
num0='8';
break;
case 23:
num0='9';
break;
case 37:
num0='.';
break;
//+-x/=
case 29:
num0='*';
break;
case 30:
num0='/';
break;
case 34:
num0='+';
break;
case 35:
num0='-';
break;
case 40:
num0='=';
//等于？
break;

case 24:
//删掉上一位，指针指向上一位？
num0 = 18 ;
break;
case 25:
//删掉整个字符串，指针指向该行起点？
num0 = 19 ;
break;
case 38:
//ans?
num0 = 20 ;
break;
case 39:
//copy?
num0 = 21 ;
break;
}

if(shift==0)
{
switch(result)
{
case 2:
//返回菜单？
num0 = 1;
break;
case 3:
num0 = 2;
break;
case 5:
//清屏，打开背光
num0 = 4;
break;
case 11:
//lcd_write_str("abs(");
num0 = 8;  //绝对值
break;
case 12:
//lcd_write_str("^2");
num0 = 9;  //平方
break;
case 13:
//lcd_write_str("^(");
num0 = '^';  //方
break;
case 14:
//lcd_write_str("^(-1)");
num0 = 11;  //倒数
break;
case 15:
//lcd_write_str("exp(");
num0 = 12;
break;
case 16:
//lcd_write_str("10^(");
num0 = 13;
break;
case 18:
//lcd_write_str("sin(");
num0 = 15;
break;
case 19:
//lcd_write_str("cos(");
num0 = 16;
break;
case 20:
//lcd_write_str("tan(");
num0 = 17;
break;

// case 31:
// num0='1';
// break;
// case 32:
// num0='2';
// break;
// case 33:
// num0='3';
// break;

}

}
else
{
switch(result)
{
case 2:
//返回设置？
num0 = 23;
break;
case 3:
num0 = 'e';
break;
case 5:
//清屏，关闭背光
//lcd_clear();
//关闭背光？
num0 = 24;
break;
case 11:
num0 = 'i';
break;
case 12:
//lcd_write_str("^(1/2)");
num0 = 25;
break;
case 13:
//lcd_write_str("^(1/");
num0 = 26;
break;
case 14:
//lcd_write_str("!");
num0 = '!';
break;
case 15:
//lcd_write_str("ln(");
num0 = 27;
break;
case 16:
//lcd_write_str("log(");
num0 = 28;
break;
case 18:
//lcd_write_str("asin(");
num0 = 29;
break;
case 19:
//lcd_write_str("acos(");
num0 = 30;
break;
case 20:
//lcd_write_str("atan(");
num0 = 31;
break;
case 31:
//lcd_write_str("x");
num0 = 'x';
break;
case 32:
//lcd_write_str("y");
num0 = 'y';
break;
case 33:
//lcd_write_str("z");
num0 = 'z';
break;
case 37:
num0 = 32;
break;
}
}
if(result != 1)
shift=0;

if(shift == 0)
bl_bright_change(byte_read(ADD_BRIGHT, 0)); //还原亮度设定
else
bl_bright_change(byte_read(ADD_SHIFTSIGN, 0)); //shift亮度设定

/////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////
if(num0==24)                            //on和off
{
TR0=0;
lcd_clear();
lcd_write_pic(0, 0, welcome_pic, 128, 64); /*波音会徽*/

lcd_set_pos(1, 4);
lcd_write_str("计算器"); /*计算器*/

lcd_set_pos(2, 4);
lcd_write_str("开心波音"); /*开心波音*/

delay_2s();
lcd_clear();
lcd_clear_pic(); /*清屏*/
bl_bright_change(0); //关灯
while(num0!=4)
num0 = keyboard_output();
bl_bright_change(byte_read(ADD_BRIGHT, 0)); //还原亮度设定

reset(); //复位
}
/////////////////////////////////////////////////////////////////////////
else if(num0==23)                            //set
{
byte_write(ADD_PROG_STATUS, SET ,0); //写入设置
reset(); //复位
}

////////////////////////////////////////////////////////////////////////
else if(num0==1)                            //mode
{
byte_write(ADD_PROG_STATUS, MODE ,0); //写入菜单
reset(); //复位
}
/////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////
return num0;
}

void about()
{
TR0=0;
lcd_clear();
lcd_write_pic(0, 0, welcome_pic, 128, 64); /*波音会徽*/

lcd_set_pos(1, 4);
lcd_write_str("计算器"); /*计算器*/

lcd_set_pos(2, 4);
lcd_write_str("开心波音"); /*开心波音*/
while(keyboard_wake());
}

ID:352458 · 发表于 2020-4-3 20:29

厉害了，这些不仅仅是一个传统意义上的科学计算器了。他是专业级别的计算器了。同学有一块专业级别可以解自控方程的要120大洋的。

ID:163090 · 发表于 2020-4-5 17:06

liu5678 发表于 2020-4-3 20:29
厉害了，这些不仅仅是一个传统意义上的科学计算器了。他是专业级别的计算器了。同学有一块专业级别可以解自 ...

哥们有没兴趣做一个给大家分享一下呢

ID:91165 · 发表于 2020-4-7 08:06

51也做得这么强大。楼主厉害

ID:281879 · 发表于 2020-4-7 13:04

太牛了学习到了

ID:458705 · 发表于 2020-4-8 15:35

一个字，牛！
两个字，特牛！
三个字，犇！

ID:87631 · 发表于 2020-4-12 14:16

这人真的是太牛了

ID:704585 · 发表于 2020-4-14 14:29

感谢楼主分享，学习一下。

ID:413383 · 发表于 2020-4-14 22:57

这人真的是太牛了,感觉太难了

ID:17204 · 发表于 2020-4-15 15:47

好难，只有吃透51才能做出来，向大佬看齐，努力学习中。。。

ID:701252 · 发表于 2020-10-17 09:35

啥也不说了！谢谢楼主分享！

ID:88256 · 发表于 2020-10-17 10:10

那个按键帽有地方买的吗？

ID:557411 · 发表于 2021-3-20 16:58

这个做得太强大了，楼主厉害

ID:894410 · 发表于 2021-3-20 19:05

注意到了键帽。。哈哈

ID:59830 · 发表于 2021-3-20 19:09

非常不错，多级LCD显示菜单.
程序结构清晰. 值得大家学习. 谢谢！

ID:358564 · 发表于 2021-3-20 19:29

感谢楼主分享，学习一下。

ID:891775 · 发表于 2021-5-3 11:34

想问一下，判断运算符优先级的代码应该怎么写呀

ID:838718 · 发表于 2021-7-21 20:11

膜拜一下，有机会挑战一下自己也搞一个。

ID:507641 · 发表于 2021-7-31 18:04

很好的学习分享实例51.对于按键的处理如果优化才是好产品

ID:507641 · 发表于 2021-7-31 18:17

功能强大。只是DS1302走时误差大了些。

ID:137590 · 发表于 2021-8-10 17:33

。因此在软件上需要做到语法识别、优先级顺序、括号嵌套等功能。计算器拥有普通计算(表达式与函数识别、计算)、计算结果存储/回看、复数计算、矩阵运算、函数图形、解方程、统计、最小二乘法求回归直线、一阶常微分方程、单位，进制转换、定积分、求导等功能。有节电模式，5分钟不输入自动关机，液晶屏亮度5级可调。

ID:137590 · 发表于 2021-8-10 17:34

一个字，牛！
两个字，特牛！
三个字，犇！

ID:137590 · 发表于 2021-10-9 21:12

好难，只有吃透51才能做出来，向大佬看齐，努力学习中。。。

ID:970860 · 发表于 2021-10-10 06:56

都是大神

ID:648615 · 发表于 2021-10-10 23:13

真提我女朋友历害，很有用，谢谢楼主

ID:62246 · 发表于 2021-10-11 07:48

厉害，厉害，大佬级人物。

ID:86450 · 发表于 2021-10-11 08:13

按键帽，在哪里买的？

ID:304725 · 发表于 2021-10-24 23:16

有原理图吗

ID:974131 · 发表于 2021-11-6 17:55

论坛有你更精彩，谢谢！

ID:1003827 · 发表于 2022-1-29 20:33

大佬就是大牛啊

ID:430492 · 发表于 2022-1-30 10:17

这个设计真是太牛掰了！动手能力也很牛掰！

ID:507641 · 发表于 2022-3-18 10:40

单片机菜鸟丿发表于 2020-4-5 17:06
哥们有没兴趣做一个给大家分享一下呢

大伽分享吧

ID:22218 · 发表于 2022-3-19 04:27

2732803160 发表于 2021-5-3 11:34
想问一下，判断运算符优先级的代码应该怎么写呀

这个我想可以按C语言内置的功能

ID:195496 · 发表于 2022-5-8 07:34

真是大神级的人物

ID:1042173 · 发表于 2022-9-2 00:36

楼主是乍作出实物来的？？？有电路图吗？？光有程序也不行呀——起好多弯路的——

ID:74784 · 发表于 2022-9-3 13:34

曾经见到过高人用51单片机
做的彩色屏俄罗斯方块游戏。

ID:961114 · 发表于 2022-9-15 10:26

大神辛苦了，帮用屠龙刀三-STC32G12K128核心功能实验板去改或开天斧三-STC8H8K64U核心功能实验板去改！ STC将提供赞助

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