微机接口大作业

tim_wr_buffer[6] = tim_rd_buffer[6];//month
tim_wr_buffer[7] = tim_rd_buffer[7];//year
PCF8583_write_n_byte(1,2,tim_wr_buffer,8);
}
void PCF8583_jian_time()//减1分钟
PCF8583_respons();
if(!tim_ack)
{
tim_err = 1;
PCF8583_stop();
return;
}
temp++;
n_byte--;
}
PCF8583_stop();
}
void PCF8583_read_n_byte(unsigned char add,unsigned char com,unsigned char n_byte)
unsigned charday;
unsigned charweekday;
unsigned charmonth;
unsigned intyear;
} time;
sbit tim_sda=P1^0;
sbit tim_scl=P1^1;
sbit sbDIN= P3^5; //MAX7219的数据引脚
sbit sbLOAD = P3^6; //MAX7219的控制引脚
模拟电脑显示数据
C语言程序：
#include <reg51.h>
#include <intrins.h>
#include <I2Clib.c>
#include <stdio.h>
struct time
{
unsigned charsecond;
unsigned charminute;
unsigned charhour;
tim_scl = 0;
delay11us(1);
tim_sda = 1;
delay11us(1);
for(i=0;i<8;i++)
{
tim_scl = 1;
delay11us(1);
k = (k<<1)|tim_sda;
tim_scl = 0;
delay11us(1);
}
return k;
}
void PCF8583_write_n_byte(unsigned char add,unsigned char com,unsigned char *dat,unsigned char n_byte) //
{
tim_wr_buffer[1] = tim_rd_buffer[1];//second
tim_wr_buffer[2] = tim_rd_buffer[2]-0x01;//minute
tim_wr_buffer[3] = tim_rd_buffer[3];//hour
tim_wr_buffer[4] = tim_rd_buffer[4];//day
{
PCF8583_master_respons(1);//如果不是最后一个字节的数据则发送一个相应位
}
temp++;
n_byte--;
}
PCF8583_stop();
}
void PCF8583_jia_time()//加1分钟
{
tim_wr_buffer[1] = tim_rd_buffer[1];//second
unsigned char tim_wr_buffer[16];
/*****************11us延时函数*************************/
void delay11us(unsigned char t)
{
for (;t>0;t--);
}
void delay(unsigned int x)
{
unsigned char i = 0;
unsigned char temp;
temp = *dat;//发送地址给'temp'.
add = add<<1;
add = 0xa0+add+0x00;
PCF8583_start();
PCF8583_wr_byte(add);
PCF8583_respons();
{
unsigned char i;
sbLOAD = 0;
for(i=0;i<8;i++)//先送出8位地址
{
sbCLK = 0; //时钟拉低
Addr <<= 1; //移位送出地址
sbDIN= CY;//送出数据
sbCLK = 1; //时钟上升沿
_nop_();
_nop_();
sbCLK = 0;
tim_ack = 1;
else
tim_ack = 0;
tim_scl = 0;
delay11us(1);
}
// i2c主器件应答
void PCF8583_master_respons(bit master_ack)
{
tim_scl = 0;
delay11us(1);
tim_sda = ~master_ack;
南京航空航天大学
研究生实验报告
姓名
学号
学 院
专业
课程名称微机接口技术
指导教师张乐年
二〇一六年八月
原理图
元器件列表
序号
原件名称
原件作用
1
AT89C51
4K字节FLASH存储器
2
TSEG-MPX8-CC-BLUE
8位7段码数码管,显示蓝色
3
MAX7219
共阴极显示驱动器，用来驱动8为7段数码显管
4
PCF8583
{
unsigned int a,b;
for(a=x;a>5;a--);
for(b=10;b>0;b--);
}
//写MAX7219函数，Addr为MAX7219的内部寄存器地址，Dat为待写入的数据
void Write7219(unsigned char Addr,unsigned char Dat)
delay11us(1);
tim_scl = 1;
delay11us(1);
tim_scl = 0;
delay11us(1);
}
//i2c初始化.
void PCF8583_init()
{
tim_sda = 1;
delay11us(1);
tim_scl = 1;
delay11us(1);
}
// i2c写n个字节
tim_wr_buffer[2] = tim_rd_buffer[2]+0x01;//minute
tim_wr_buffer[3] = tim_rd_buffer[3];//hour
tim_wr_buffer[4] = tim_rd_buffer[4];//day
tim_wr_buffer[5] = tim_rd_buffer[5];//weekday
tim_scl = 1;
delay11us(1);
tim_sda = 0;
}
//i2c从器件应答
void PCF8583_respons()
{
unsigned char i;
tim_scl = 1;
delay11us(1);
while((tim_sda)&&(i<250)) i++;
if(!tim_sda)
{
tim_sda = 1;
delay11us(1);
tim_scl = 1;
delay11us(1);
tim_sda = 0;
delay11us(1);
}
// i2c停止.
void PCF8583_stop()//一个从低到高的跳变作为i2c停止标志.
{
tim_sda = 0;
delay11us(1);
带256字节RAM的实时时钟芯片，用于显示时间
5
ADC0809
8通道A/D转换芯片，用于采集外部模拟电压信号，并向单片机输出数字信号
6
POT-HG
电位器模拟外部模拟信号
7
FM24C256
用于保存最近20个外部故障数据包（包含故障点和故障时间）
8
MAX232
将系统与上位机想连接，传输数据
9
VIRTUAL TERMINAL
{
Write7219(0x09,0xff);//编码模式寄存器
Write7219(0x0a,0x07);//显示亮度控制
Write7219(0x0b,0x07);//扫描控制
Write7219(0x0c,0x01);//关闭模式控制寄存器设置
}
// i2c启动
void PCF8583_start()//一个从高到底的跳变作为i2c启动标志.
sbit sbCLK = P3^7; //MAX7219的时钟引脚
sbit OE = P2^3; //OE引脚
sbit EOC = P2^2; //EOC引脚定义
sbit ST = P2^1; //启动引脚定义START
sbit CLK = P2^0; //时钟引脚定义CLK
sbit ADDRA = P2^5;
tim_wr_buffer[5] = tim_rd_buffer[5];//weekday
tim_wr_buffer[6] = tim_rd_buffer[6];//month