求助关于PCF8591和GP2Y1014传感器，帮忙看看代码哪里有问题，主要是AD转换那块

ID:295381 · 发表于 2018-4-10 15:19

PCF8591:

#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
#define somenop() _nop_(),_nop_(),_nop_(),_nop_(),_nop_(),_nop_()

#define  WRITEADDR 0x90
#define  READADDR  0x91
//PCF89C51??
sbit SCL=P1^0;
sbit SDA=P1^1;
bit ack;
void Init_I2c()
{
SDA=1;
somenop();
SCL=1;
somenop();
}

void Start_I2c()
{
  SDA=1;
  somenop();
  SCL=1;
  somenop();
  SDA=0;
  somenop();
  SCL=0;
  somenop();
}

void Stop_I2c()
{
  SDA=0;
  somenop();
  SCL=0;
  somenop();
  SCL=1;
  somenop();
  SDA=1;
  somenop();
}

void  SendByte(uchar  c)
{
uchar  i;

for(i=0;i<8;i++)
{
   if((c<<i)&0x80)SDA=1;
   else  SDA=0;
   somenop();
   SCL=1;
   somenop();
   SCL=0;
}

somenop();
SDA=1;
somenop();
SCL=1;
somenop();

if(SDA==1)ack=0;
   else ack=1;
SCL=0;
somenop();
}

uchar RcvByte()
{
  uchar  retc;
  uchar  i;

  retc=0;
  SDA=1;
  for(i=0;i<8;i++)
   {
      somenop();
      SCL=0;
      somenop();
      SCL=1;
      somenop();
      retc=retc<<1;
      if(SDA==1)retc=retc+1;
      somenop();
   }
  SCL=0;
  somenop();
  return(retc);
}

void Ack_I2c(bit a)
{
  if(a==0)
{
  SDA=0;
  somenop();
  SCL=1;
  somenop();
  SCL=0;
  somenop();
  SDA=0;
  somenop();
  SDA=1;
  somenop();
}
  else
{
  SDA=1;
somenop();
SCL=1;
somenop();
SCL=0;
somenop();
SDA=0;
somenop();
}
}

bit ISendByte(uchar add,uchar channel)
{
Start_I2c();
SendByte(add);
if(ack==0)return(0);
SendByte(0x40|channel);
if(ack==0)return(0);
Stop_I2c();
return(1);
}

uchar IRcvByte(uchar add)
{
uchar dat;
Start_I2c();
SendByte(add+1);
if(ack==0)return(0);
dat=RcvByte();
Ack_I2c(1);
Stop_I2c();
return(dat);
}
sbit vled  = P3^2;
void Delay1us(uint t)
{
while(t--)_nop_();
}
uint read_data()
{
uint val=0;
//Init_I2c();
vled=0;
Delay1us(20);
ISendByte(WRITEADDR,0);
//val=adc0832(N,M);
val=IRcvByte(WRITEADDR);
vled=1;
Delay1us(400);
return val;
}

主函数：
#include <reg52.h>
#include <lcd1602.h>
#include <math.h>
#include <pcf.h>
#define uchar unsigned char
#define uint  unsigned int
void main(void)
{
double PM,pm1,pm2;
int PMVAL=0,HPM=200,PM_count=0,pm1_count=0;
uchar disp[16]  ={"PM2.5:0000ug/m3 "};
LCD_Init();
  WriteChar(1,0,16,disp);
while(1)
{

  pm1+=read_data();//这里为把AD转换后的值传过来
  if(++PM_count>=20)
  {
   PM_count=0;
   pm1=pm1/20;
pm2+=pm1;
pm1=0;
if(++pm1_count>=5)
{
pm1_count=0;
PM=pm2/5;
PM=PM*50/255;
PM-=4;
   PM/=5;
PM*=1000;
PMVAL=PM;
PMVAL+=235; PMVAL=PMVAL/9;
if(PMVAL>=9999)PMVAL=9999;
WriteCOMorDATA(0x86,0);
if(PMVAL<0)//PMVAL=0;
{WriteCOMorDATA(0+0x30,1);PMVAL=abs(PMVAL);}
else WriteCOMorDATA(PMVAL/1000+0x30,1);
WriteCOMorDATA(PMVAL/100%10+0x30,1);
WriteCOMorDATA(PMVAL/10%10+0x30,1);
WriteCOMorDATA(PMVAL%10+0x30,1);
PM=pm1=pm2=0;
}
  }
}
}

ID:307472 · 发表于 2018-7-5 14:49

你好，现在你的程序好使了么？？？

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