DS18B20_ATY.h File Reference

Familiar functions of DS18B20 for all embedded device. More...

#include "INCLUDE_ATY.h"
#include "stm32f10x.h"
#include "sys.h"

Go to the source code of this file.

Macros
#define	AD5245_AD0   1
#define	__DEBUG_DS18B20_ATY
#define	AD5245_ADDRESS   (0x2C | AD5245_AD0)
#define	DS18B20_H
#define	DS18B20_OutPut_Mode()   {GPIOB->CRL &= 0x0FFFFFFF;GPIOB->CRL |= 0x30000000;}
#define	DS18B20_InPut_Mode()   {GPIOB->CRL &= 0x0FFFFFFF;GPIOB->CRL |= 0x80000000;}
#define	DS18B20_IN   PBin(7)
#define	DS18B20_OUT   PBout(7)

Functions
void	DS18B20_Init (void)
u8	DS18B20_CheckDevice (void)
void	DS18B20_SendRestSingle (void)
u8	DS18B20_CheckReadySingle (void)
u8	BS18B20_WriteByte (u8 cmd)
u8	BS18B20_ReadByte (void)
u16	DS18B20_GetTemperature (void)
u8	DS18B20_ReadRomInfo (void)
u8	DS18B20_MatchROM (void)

Variables
u8	Refresh_OLED_Data

Detailed Description

Familiar functions of DS18B20 for all embedded device.

Parameters

Project

DEVICE_GENERAL_ATY_LIB

Author

ATY

Copyright

• Copyright 2017 - 2023 MZ-ATY
• This code follows:
  • MZ-ATY Various Contents Joint Statement - https://mengze.top/MZ-ATY_VCJS
  • CC 4.0 BY-NC-SA - https://creativecommons.org/licenses/by-nc-sa/4.0/
• Your use will be deemed to have accepted the terms of this statement.

Version

• 1_01_220927 > ATY
  1. Preliminary version, first Release

Definition in file DS18B20_ATY.h.

Macro Definition Documentation

__DEBUG_DS18B20_ATY

#define __DEBUG_DS18B20_ATY

Definition at line 36 of file DS18B20_ATY.h.

AD5245_AD0

#define AD5245_AD0   1

Definition at line 34 of file DS18B20_ATY.h.

AD5245_ADDRESS

#define AD5245_ADDRESS   (0x2C | AD5245_AD0)

Definition at line 42 of file DS18B20_ATY.h.

DS18B20_H

#define DS18B20_H

Definition at line 45 of file DS18B20_ATY.h.

DS18B20_IN

#define DS18B20_IN   PBin(7)

Definition at line 52 of file DS18B20_ATY.h.

DS18B20_InPut_Mode

#define DS18B20_InPut_Mode

(

)

{GPIOB->CRL &= 0x0FFFFFFF;GPIOB->CRL |= 0x80000000;}

Definition at line 50 of file DS18B20_ATY.h.

DS18B20_OUT

#define DS18B20_OUT   PBout(7)

Definition at line 53 of file DS18B20_ATY.h.

DS18B20_OutPut_Mode

#define DS18B20_OutPut_Mode

(

)

{GPIOB->CRL &= 0x0FFFFFFF;GPIOB->CRL |= 0x30000000;}

Definition at line 49 of file DS18B20_ATY.h.

Function Documentation

BS18B20_ReadByte()

u8 BS18B20_ReadByte

(

void

)

BS18B20_WriteByte()

u8 BS18B20_WriteByte

(

u8

cmd

)

Definition at line 125 of file DS18B20_ATY.c.

{
    u8 i = 0;
    DS18B20_OutPut_Mode();
    for(i = 0; i < 8; i++)
    {
        DS18B20_OUT = 0;
        DelayUs(2);     //主机拉低总线写数据时间隙2us
        DS18B20_OUT = cmd & 0x01;  //如果该写入位为1，必须在15us之内把总线拉高，为0 保持60us即可。
        DelayUs(60);    //确保DS18B20已经成功读取到该位数据
        DS18B20_OUT = 1;  //一位发送完成
        cmd >>= 1;
        DelayUs(2);     //位间隙2us
    }
    return 0;
}

DS18B20_CheckDevice()

u8 DS18B20_CheckDevice

(

void

)

Definition at line 118 of file DS18B20_ATY.c.

{
    DS18B20_SendRestSingle();/*1.主机发送复位信号*/
    return DS18B20_CheckReadySingle();/*2.检测存在脉冲*/
}

DS18B20_CheckReadySingle()

u8 DS18B20_CheckReadySingle

(

void

)

Definition at line 88 of file DS18B20_ATY.c.

{
    u8 cnt = 0;
    /*1.检测存在脉冲*/
    DS18B20_InPut_Mode();
    while(DS18B20_IN && cnt < 240) //等待DS18B20 拉低总线 （60~240 us 响应复位信号）
    {
        DelayUs(1);
        cnt++;
    }
    if(cnt > 240) return 1;
    /*2.检测DS18B20是否释放总线*/
    cnt = 0;
    DS18B20_InPut_Mode();
    while((!DS18B20_IN) && cnt < 240)  //判断DS18B20是否释放总线（60~240 us 响应复位信号之后会释放总线）
    {
        DelayUs(1);
        cnt++;
    }
    if(cnt > 240)   return 2;
    else return 0;
}

DS18B20_GetTemperature()

u16 DS18B20_GetTemperature

(

void

)

Definition at line 167 of file DS18B20_ATY.c.

{
    u16 temp = 0;
    u8 temp_H, temp_L;
    int intT, decT;
    DS18B20_CheckDevice();   //发送复位脉冲、检测存在脉冲
    BS18B20_WriteByte(0xCC); //跳过ROM序列检测
    BS18B20_WriteByte(0x44); //启动一次温度转换
 
    //等待温度转换完成
    while(DS18B20_ReadByte() != 0xFF){}
 
    DS18B20_CheckDevice();   //发送复位脉冲、检测存在脉冲
    BS18B20_WriteByte(0xCC); //跳过ROM序列检测
    BS18B20_WriteByte(0xBE); //读取温度
 
    temp_L = DS18B20_ReadByte(); //读取的温度低位数据
    temp_H = DS18B20_ReadByte(); //读取的温度高位数据
    temp = temp_L | (temp_H << 8);   //合成温度
    intT = temp >> 4;          /*合成实际温度整数部分****精度相对上面的更高*/
    decT = temp & 0xF;         /*合成实际温度小数部分*/
    printf("温度:%d.%d ℃ \n", intT, decT);
    return temp;
}

DS18B20_Init()

void DS18B20_Init

(

void

)

Definition at line 53 of file DS18B20_ATY.c.

{
    /*1.GPIOC口初始化*/
    RCC->APB2ENR |= 1 << 3;
    GPIOB->CRL &= 0x0FFFFFFF;
    GPIOB->CRL |= 0x30000000;
    GPIOB->ODR |= 1 << 7;
 
    /*2.检测DS18B20设备是否正常*/
    switch(DS18B20_CheckDevice())
    {
        case 0: printf("DS18B20_Init OK!\n"); break;
        case 1: printf("DS18B20设备响应复位信号失败！\n"); break;
        case 2: printf("DS18B20设备释放总线失败！\n"); break;
    }
}

DS18B20_MatchROM()

u8 DS18B20_MatchROM

(

void

)

Definition at line 253 of file DS18B20_ATY.c.

{
    u8 i = 0;
    BS18B20_WriteByte(0x55);  /*4.匹配64位 ROM 信息*/
    for(i = 0; i < 8; i++)
    {
        BS18B20_WriteByte(ROM_ID[i]);
    }
    return 0;
}

DS18B20_ReadRomInfo()

u8 DS18B20_ReadRomInfo

(

void

)

• crc = x^8 + x^5 + x^4 + 1*‍/

Definition at line 224 of file DS18B20_ATY.c.

{
    u8 i = 0;
    BS18B20_WriteByte(0x33);  /*4.启动读取ROM*/
    for(i = 0; i < 8; i++)
    {
        ROM_ID[i] = DS18B20_ReadByte();
    }
    printf("ROM_ID= ");
    for(i = 0; i < 8; i++)
    {
        printf("%X", ROM_ID[i]);
        if(i == 7) printf("\n");
        else printf("-");
    }
    return 0;
}

DS18B20_SendRestSingle()

void DS18B20_SendRestSingle

(

void

)

Definition at line 71 of file DS18B20_ATY.c.

{
    /*主机发送复位信号*/
    DS18B20_OutPut_Mode();
    DS18B20_OUT = 0; //拉低总线480~960 us ，对 DS18B20 芯片进行复位
    DelayUs(750);
    DS18B20_OUT = 1;
    DelayUs(15);         //释放总线15~60 us
}

Variable Documentation

Refresh_OLED_Data

u8 Refresh_OLED_Data

extern

Definition at line 43 of file DS18B20_ATY.c.