基于單片機(jī)的可調(diào)電壓設(shè)計(jì)

1、精選優(yōu)質(zhì)文檔-傾情為你奉上#include "reg52.h"/宏定義#define uchar unsigned char#define uint unsigned int/按鍵定義sbit KEY1= P20;sbit KEY2= P21;sbit KEY3= P22;sbit KEY4= P23;/數(shù)碼管定義sbit W1= P24;sbit W2= P25;sbit W3= P26;sbit W4= P27;/DAC定義sbit CS_5615=P32;sbit CLK_5615=P33;sbit DAT_5615=P34;/報(bào)警指示定義 sbit beep = P

2、36; sbit Duan = P37; uint U; bit flag=0;uint a=0; uchar code table= 0xC0,/*0*/ 0xF9,/*1*/ 0xA4,/*2*/ 0xB0,/*3*/ 0x99,/*4*/ 0x92,/*5*/ 0x82,/*6*/ 0xF8,/*7*/ 0x80,/*8*/ 0x90,/*9*/;/共陽(yáng)數(shù)碼管段碼表沒有小數(shù)點(diǎn) 09void delay_ms(uint z) /延時(shí)函數(shù) uint a,b; for(a=z;a>0;a-) for(b=125;b>0;b-);void shuma(uint buf)P0=tabl

3、ebuf%1000/100;W1=0;delay_ms(1); P0=0xff;W1=1;P0=tablebuf%100/10&0x7f; W2=0;delay_ms(1);P0=0xff;W2=1;P0=tablebuf%10;W3=0;delay_ms(1);P0=0xff;W3=1;P0=0xC1;W4=0;delay_ms(1);P0=0xff;W4=1;void tlc_5615(uint buf)uint a,c;c=buf; CS_5615=0; for(a=16;a>0;a-) DAT_5615=c>>15; c=c<<1; CLK_561

4、5=1; CLK_5615=0; CLK_5615=1;CLK_5615=0;CLK_5615=1;CLK_5615=0;CS_5615=1; /主函數(shù)void main(void) U=0;beep=0;delay_ms(300);beep=1;while(1)tlc_5615(U*10);shuma(U);if(flag=0)if(KEY1=0) delay_ms(5);if(KEY1=0) while(!KEY1); if(U<120)U+;if(KEY2=0)delay_ms(5);if(KEY2=0) while(!KEY2);if(U>0) U-; if(KEY3=0)if(KEY3=0)U=50;if(KEY4=0) if(KEY4=0) U=0; if(Duan=0)delay_ms(10);if(Du