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本系统采用MCU(SM8952AC25P)作为主控器件,单片机应用系统由硬件和软件组成。硬件由单片机扩展的存储器、输入/出设备以及各种实现单片机系统控制要求的接口电路和有关的外围电路芯片或部件组成;软件由单片机应用系统实现其特定控制功能的各种工作程序和管理程序组成。
Altium Designer画的原理图和PCB图如下:(51hei附件中可下载工程文件)
部分单片机代码:
#include <AT89X55.H>
bit r_flag;
enum eepromtype {M2401,M2402,M2404,M2408,M2416,M2432,M2464,M24128,M24256};
extern bit RW24XX(unsigned char *DataBuff,unsigned char ByteQuantity,unsigned int Address,
unsigned char ControlByte,enum eepromtype EepromType);
sbit key = P2^0;
bit key_flag;
sbit dog = P0^7;
sbit LED = P0^0;
sbit TELA = P3^6;
sbit TEL = P3^7;
sbit RING = P3^2;
sbit switching =P0^4;
unsigned char mode;
bit passwordflag;
unsigned char password[6];
unsigned char passwordtest[6];
void dlms(unsigned int x);
void reset(void);
void open(void);
//**************************************************************** //
// INT1中断服务程序 //
//**************************************************************** //
unsigned char ring_fluctuation;
unsigned char ring_count;
bit ring_flag;
void service_int0() interrupt 0 using 1
{
if(ring_fluctuation<10)
{
ring_fluctuation++;
}
}
//**************************************************************** //
// t1 定时中断 //
//**************************************************************** //
unsigned char ring_dlsm;
unsigned char ring_time;
unsigned int ring_reset_time;
unsigned char dlms_time;
void timer1 (void) interrupt 3 using 0
{
TH1=0x3c;
TL1=0xb0;
dlms_time++;
if(ring_fluctuation>5)
{
EX0=0;//INT1_OFF;
ring_dlsm++;
if(ring_dlsm==20)//等待一秒
{
ring_dlsm=0;
EX0=1;//INT1_ON;
ring_fluctuation=0;
ring_count++;//震铃次数
if(ring_flag)//有效振铃
{
if(ring_count==6)
{
ring_count=7;
mode=1;
}
}
else//无效振铃
{
if(ring_count>2)
{
ring_reset_time=800;
}
}
}
}
if((ring_count==2)|(ring_count==1))
{
ring_time++;
if(ring_time==200)
{
ring_flag=1;
}
}
if((ring_count>0)&(ring_count<6))
{
LED=INT0;
}
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