基于stm32风速风向温湿度和瓦斯检测（仿真+代码）
资料下载地址：基于stm32风速风向温湿度和瓦斯检测
一、项目功能
1.风速，风向，温湿度，瓦斯，报警。
2.可以设置温湿度，瓦斯，风速报警阈值。
3.数据上传到云平台。
二、仿真图
三、程序
#include "dht11.h"
#include "main.h"
void delay(uint32_t us)
{
while(us--)
{
for(int i = 0 ; i < 5 ;i++);
}
}
void DHT11_IO_IN(void)//温湿度模块输入函数
{
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.Pin = GPIO_PIN_15;
GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA,&GPIO_InitStructure);
}
void DHT11_IO_OUT(void)//温湿度模块输出函数
{
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.Pin = GPIO_PIN_15;
GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStructure.Pull = GPIO_NOPULL;
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;
HAL_GPIO_Init(GPIOA,&GPIO_InitStructure);
}
//复位DHT11
void DHT11_Rst(void)
{
DHT11_IO_OUT(); //SET OUTPUT
DHT11_DQ_High ;
DHT11_DQ_Low; //DQ=0
delay(30000); //拉低至少18ms
DHT11_DQ_High; //DQ=1
delay(100); //主机拉高20~40us
}
//等待DHT11的回应
//返回1:未检测到DHT11的存在
//返回0:存在
uint8_t DHT11_Check(void)
{
uint8_t retry=0;//定义临时变量
DHT11_IO_IN(); //SET INPUT
if (HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_15)==1)//DHT11会拉低40~80us
{
return 0 ;
}else
{
while(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_15)==0 && (retry < 200))retry++ ;
}
delay(40) ;
delay(40) ;
return 1 ;
}
//从DHT11读取一个位
//返回值：1/0
uint8_t DHT11_Read_Bit(void)
{
uint8_t retry=0;
while((HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_15)==1)&&retry<100)//等待变为低电平
{
retry++;
delay(2);
}
retry=0;
while((HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_15)==0)&&retry<100)//等待变高电平
{
retry++;
delay(2);
}
delay(40);//等待40us
if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_15)==1)
return 1;
else
return 0;
}
//从DHT11读取一个字节
//返回值：读到的数据
uint8_t DHT11_Read_Byte(void)
{
uint8_t i,dat;
dat=0;
for (i=0;i<8;i++)
{
dat<<=1;
dat|=DHT11_Read_Bit();
}
return dat;
}
//从DHT11读取一次数据
//temp:温度值(范围:0~50°)
//humi:湿度值(范围:20%~90%)
//返回值：0,正常;1,读取失败
uint8_t DHT11_Read_Data(uint8_t *temp,uint8_t *humi)
{
uint8_t buf[5];
uint8_t i;
DHT11_Rst();
if(DHT11_Check()==0)
{
for(i=0;i<5;i++)//读取40位数据
{
buf[i]=DHT11_Read_Byte();
}
if((buf[0]+buf[1]+buf[2]+buf[3])==buf[4])
{
*humi=buf[0];
*temp=buf[2];
}
}
else return 1;
return 0;
}
//初始化DHT11的IO口 DQ 同时检测DHT11的存在
//返回1:不存在
//返回0:存在
void DHT11_Init(void)
{
DHT11_Rst(); //复位DHT11
DHT11_Check();//等待DHT11的回应
}
uint8_t DHT_ByteRead(unsigned char *dat)
{ unsigned char temp=0;
unsigned char x,y;
unsigned char m=0;
unsigned char n=0;
unsigned char mask=0x01;
unsigned char sum=0;
DHT11_IO_IN() ;
for(y=0;y<5;y++)
{
for(mask=0x80;mask!=0;mask>>=1)
{
while(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_15)==0&&m<200)m++;
delay(30);
if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_15)==1)
temp|=mask;
else
temp&=(~mask);
while(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_15)==1&&n<200)n++;
}
*(dat+y)=temp;
temp=0;
}
for(x=0;x<4;x++)
sum+=*(dat+x);
if((sum&=0xff)==*(dat+4))
return 1;
else
return 0;
}
#include "oled.h"
#include "codetab.h"
#include "main.h"
void OLED_WR_Byte(u8 dat,u8 cmd)
{
u8 i;
if(cmd)
OLED_DC_Set();
else
OLED_DC_Clr();
OLED_CS_Clr();
for(i=0;i<8;i++)
{
OLED_SCLK_Clr();
if(dat&0x80)
OLED_SDIN_Set();
else
OLED_SDIN_Clr();
OLED_SCLK_Set();
dat<<=1;
}
OLED_CS_Set();
OLED_DC_Set();
}
void OLED_Set_Pos(unsigned char x, unsigned char y)
{
OLED_WR_Byte(0xb0+y,OLED_CMD);
OLED_WR_Byte(((x&0xf0)>>4)|0x10,OLED_CMD);
OLED_WR_Byte((x&0x0f)|0x01,OLED_CMD);
}
//开启OLED显示
void OLED_Display_On(void)
{
OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令
OLED_WR_Byte(0X14,OLED_CMD); //DCDC ON
OLED_WR_Byte(0XAF,OLED_CMD); //DISPLAY ON
}
//关闭OLED显示
void OLED_Display_Off(void)
{
OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令
OLED_WR_Byte(0X10,OLED_CMD); //DCDC OFF
OLED_WR_Byte(0XAE,OLED_CMD); //DISPLAY OFF
}
//清屏函数,清完屏,整个屏幕是黑色的!和没点亮一样!!!
void OLED_Clear(void)
{
u8 i,n;
for(i=0;i<8;i++)
{
OLED_WR_Byte (0xb0+i,OLED_CMD); //设置页地址（0~7）
OLED_WR_Byte (0x00,OLED_CMD); //设置显示位置—列低地址
OLED_WR_Byte (0x10,OLED_CMD); //设置显示位置—列高地址
for(n=0;n<128;n++)OLED_WR_Byte(0,OLED_DATA);
} //更新显示
}
//在指定位置显示一个字符,包括部分字符
//x:0~127
//y:0~63
//mode:0,反白显示;1,正常显示
//size:选择字体 16/12
void OLED_ShowChar(u8 x,u8 y,u8 chr)
{
unsigned char c=0,i=0;
c=chr-' ';//得到偏移后的值
if(x>Max_Column-1){x=0;y=y+2;}
if(SIZE ==16)
{
OLED_Set_Pos(x,y);
for(i=0;i<8;i++)
OLED_WR_Byte(F8X16[c*16+i],OLED_DATA);
OLED_Set_Pos(x,y+1);
for(i=0;i<8;i++)
OLED_WR_Byte(F8X16[c*16+i+8],OLED_DATA);
}
else {
OLED_Set_Pos(x,y+1);
for(i=0;i<6;i++)
OLED_WR_Byte(F6x8[c][i],OLED_DATA);
}
}
//m^n函数
u32 oled_pow(u8 m,u8 n)
{
u32 result=1;
while(n--)result*=m;
return result;
}
//x,y :起点坐标
//len :数字的位数
//size:字体大小
//mode:模式 0,填充模式;1,叠加模式
//num:数值(0~4294967295);
void OLED_ShowNum(u8 x,u8 y,u32 num,u8 len,u8 size)
{
u8 t,temp;
u8 enshow=0;
for(t=0;t120){x=0;y+=2;}
j++;
}
}
//显示汉字
void OLED_ShowCHinese(u8 x,u8 y,u8 no)
{
u8 t,adder=0;
OLED_Set_Pos(x,y);
for(t=0;t<16;t++)
{
OLED_WR_Byte(Hzk[2*no][t],OLED_DATA);
adder+=1;
}
OLED_Set_Pos(x,y+1);
for(t=0;t<16;t++)
{
OLED_WR_Byte(Hzk[2*no+1][t],OLED_DATA);
adder+=1;
}
}
void OLED_Init(void)
{
int ticks;
GPIO_InitTypeDef GPIO_InitStructure;
__HAL_RCC_GPIOB_CLK_ENABLE();
GPIO_InitStructure.Pin = GPIO_PIN_2|GPIO_PIN_7|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_8|GPIO_PIN_13; //PD3,PD6推挽输出
GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP; //推挽输出
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;//速度50MHz
HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_2|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12|GPIO_PIN_8|GPIO_PIN_13,GPIO_PIN_SET); //PD3,PD6 输出高
HAL_GPIO_WritePin(GPIOB,GPIO_PIN_7,GPIO_PIN_RESET);
GPIO_InitStructure.Pin = GPIO_PIN_5;
GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
OLED_RST_Set();
delay_ms(1);
OLED_RST_Clr();
delay_ms(1);
OLED_RST_Set();
OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel
OLED_WR_Byte(0x00,OLED_CMD);//---set low column address
OLED_WR_Byte(0x10,OLED_CMD);//---set high column address
OLED_WR_Byte(0x40,OLED_CMD);//--set start line address Set Mapping RAM Display Start Line (0x00~0x3F)
OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register
OLED_WR_Byte(0xCF,OLED_CMD); // Set SEG Output Current Brightness
OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping 0xa0左右反置 0xa1正常
OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction 0xc0上下反置 0xc8正常
OLED_WR_Byte(0xA6,OLED_CMD);//--set normal display
OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty
OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)
OLED_WR_Byte(0x00,OLED_CMD);//-not offset
OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency
OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec
OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period
OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration
OLED_WR_Byte(0x12,OLED_CMD);
OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh
OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level
OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)
OLED_WR_Byte(0x02,OLED_CMD);//
OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable
OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disable
OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)
OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7)
OLED_WR_Byte(0xAF,OLED_CMD);//--turn on oled panel
OLED_WR_Byte(0xAF,OLED_CMD); /*display ON*/
OLED_Clear();
OLED_Set_Pos(0,0);
}
void delay_ms(uint16_t times)
{
for(int i = 0 ; i < times ; i ++)
{
for(int m = 50000;m > 0 ; m --);
}
}
void DisPlay_Init(void)
{
OLED_ShowCHinese(0,0,3); //温
OLED_ShowCHinese(15,0,4); //度
OLED_ShowString(30,0,":");//:
OLED_ShowCHinese(65,0,1); //湿
OLED_ShowCHinese(80,0,4); //度
OLED_ShowString(95,0,":");//:
OLED_ShowCHinese(0,2,7); //
OLED_ShowCHinese(15,2,8); //
OLED_ShowString(30,2,":");//:
OLED_ShowCHinese(0,4,7); //
OLED_ShowCHinese(15,4,9); //
OLED_ShowString(30,4,":");//:
OLED_ShowCHinese(0,6,5); //
OLED_ShowCHinese(15,6,6); //
OLED_ShowString(30,6,":");//:
}