AD7606的RD和CS的链接问题

只看该作者 · 2018-5-26 17:55

老铁们，你们有没有见过这种接线方式的？最近在用AD7606做东西，发现别人分享的程序有一个这样的，rd_and_cs = P1^7;RD和CS接在一起？无法理解啊！老铁们帮我看看吧

sbit OS0 = P1^0;
sbit OS1 = P1^1;
sbit OS2 = P1^2;

sbit rage = P1^3;
sbit convst = P1^4;
sbit busy = P1^5;
sbit rst = P1^6;
sbit rd_and_cs = P1^7;
全部程序在下面：
* This is a program for testing AD7606       used STC89C52RC
* The line connecting AD7606 with STC89C52RC is:
* STC89C52RC | AD7606
*       P0                      |       DB[0:7]
* P2       | DB[8:15]
* OS0       | P1^0
* OS1       | P1^1
* OS2       | P1^2
* rage       | P1^3
* convst    | P1^4
* busy       | P1^5
* rst       | P1^6
* rd_and_cs | P1^7
* green_led | P3^6
* red_led    | P3^7
*       GND                | GND
* +5V                | VCC
* green_led | P3_6
* red_led    | P3_7
* Author : jinming chen
* Compang : Hongwei in dongguan
* Date : Sep 1       ,2015
*/

#include <reg52.h>
#include <intrins.h>
#include <stdio.h>
#include "AD7076.h"
#include "other.h"

//uchar introduce1[] = "This is a program ";
//uchar introduce2[] = "for testing AD7606\r\n";
uchar sampling[] = "The sampling data is : ";
uchar newline[] = "\r\n";
uchar space[] = " ";
uchar *DB_str[16] = {"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"};

/*
uchar *data_to_string(uchar Data)
{
      uchar tmp;
      tmp = Data & 0x0f;
      str[1] =DB_str[binary_to_decimal(tmp)];
      tmp = Data>>4;
      str[0] =DB_str[binary_to_decimal(tmp)];
      return str;
}
*/

void serial_init(void)
{
      SCON = 0x50;  //UART为模式一，8位数据，允许接收
      TMOD |= 0x20;       //定时器1为模式二，8位自动重装
      PCON |= 0x80;       //SMOD=1
      TH1 =0xfd;             //波特率为19200，晶振频率为11.0592MHz
      IE = 0x00;
      TR1 = 1;
      TI = 1;
}
/*
//向串口发送一个函数
void serial_send_byte(uchar ch)
{
      SBUF=ch;
while (TI== 0);
TI = 0 ;
}
*/

//向串口发送一串字符数据
void serial_send_string(uchar *p)
{
      while(*p != '\0')
      {
            SBUF = *p;
            while(TI == 0);
            TI = 0;
            p++;
      }
}

int main()
{
      struct DB_data_struct *DB_data;
      uchar k,tmp;
      uchar DB_data_cmp[8];
      serial_init();
      AD7606_init();
      while(1)
      {
//             DB_data = DB_str;
//             serial_send_string(introduce1);
//             serial_send_string(introduce2);
            AD7606_startconvst();
            while((busy == 1))             //当busy为低电平时，数据转换完毕，此时可以读取数据
            {
//                      serial_send_byte(busy);
//                      delay_ms(500);
                     ;
            }
            DB_data = AD7606_read_data();
            serial_send_string(sampling);
            for(k=0;k<8;k++)
            {
                     tmp = (DB_data->DB_data_H>>4) & 0x0f;
                     serial_send_string(DB_str[tmp]);
                     tmp = (DB_data->DB_data_H) & 0x0f;
                     serial_send_string(DB_str[tmp]);
                     tmp = (DB_data->DB_data_L>>4) & 0x0f;
                     serial_send_string(DB_str[tmp]);
                     tmp = (DB_data->DB_data_L) & 0x0f;
                     serial_send_string(DB_str[tmp]);
                     serial_send_string(space);
                     DB_data_cmp[k] = DB_data->DB_data_H;
                     DB_data += 1;
            }
            if((DB_data_cmp[0]>0x7D)&&(DB_data_cmp[1]>0x7D)&&(DB_data_cmp[2]>0x7D)&&(DB_data_cmp[3]>0x7D)       \
            &&(DB_data_cmp[4]>0x7D)&&(DB_data_cmp[5]>0x7D)&&(DB_data_cmp[6]>0x7D)&&(DB_data_cmp[7]>0x7D))
            {       //电压检测为预定值，则绿灯亮
                     red_led = 0;
                     green_led = 1;
            }
            else
            {       //电压检测为非预定值，则红灯亮
                     green_led = 0;
                     red_led = 1;
            }
            serial_send_string(newline);
            serial_send_string(newline);
            serial_send_string(newline);
            delay_ms(300);
      }
      return 0;
}