資料下載地址：基于stm32風速風向溫濕度和瓦斯檢測
一、項目功能
1.風速，風向，溫濕度，瓦斯，報警。
2.可以設置溫濕度，瓦斯，風速報警閾值。
3.數據上傳到云平臺。
二、仿真圖
?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)//溫濕度模塊輸入函數
{__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)//溫濕度模塊輸出函數
{__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);
}//復位DHT11void DHT11_Rst(void) { DHT11_IO_OUT(); //SET OUTPUTDHT11_DQ_High ;DHT11_DQ_Low; //DQ=0delay(30000); //拉低至少18msDHT11_DQ_High; //DQ=1 delay(100); //主機拉高20~40us}//等待DHT11的回應//返回1:未檢測到DHT11的存在//返回0:存在uint8_t DHT11_Check(void) { uint8_t retry=0;//定義臨時變量DHT11_IO_IN(); //SET INPUT if (HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_15)==1)//DHT11會拉低40~80us{return 0 ;}else{while(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_15)==0 && (retry < 200))retry++ ;}delay(40) ;delay(40) ;return 1 ;}//從DHT11讀取一個位//返回值：1/0uint8_t DHT11_Read_Bit(void) {uint8_t retry=0;while((HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_15)==1)&&retry<100)//等待變為低電平{retry++;delay(2);}retry=0;while((HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_15)==0)&&retry<100)//等待變高電平{retry++;delay(2);}delay(40);//等待40usif(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_15)==1)return 1;else return 0; }//從DHT11讀取一個字節//返回值：讀到的數據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;}//從DHT11讀取一次數據//temp:溫度值(范圍:0~50°)//humi:濕度值(范圍:20%~90%)//返回值：0,正常;1,讀取失敗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++)//讀取40位數據{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 同時檢測DHT11的存在//返回1:不存在//返回0:存在 void DHT11_Init(void){ DHT11_Rst(); //復位DHT11DHT11_Check();//等待DHT11的回應}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;elsetemp&=(~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);
} //開啟OLED顯示
void OLED_Display_On(void)
{OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令OLED_WR_Byte(0X14,OLED_CMD); //DCDC ONOLED_WR_Byte(0XAF,OLED_CMD); //DISPLAY ON
}//關閉OLED顯示
void OLED_Display_Off(void)
{OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令OLED_WR_Byte(0X10,OLED_CMD); //DCDC OFFOLED_WR_Byte(0XAE,OLED_CMD); //DISPLAY OFF
}//清屏函數,清完屏,整個屏幕是黑色的!和沒點亮一樣!!!
void OLED_Clear(void)
{ u8 i,n; for(i=0;i<8;i++) { OLED_WR_Byte (0xb0+i,OLED_CMD); //設置頁地址（0~7）OLED_WR_Byte (0x00,OLED_CMD); //設置顯示位置—列低地址OLED_WR_Byte (0x10,OLED_CMD); //設置顯示位置—列高地址 for(n=0;n<128;n++)OLED_WR_Byte(0,OLED_DATA); } //更新顯示
}//在指定位置顯示一個字符,包括部分字符
//x:0~127
//y:0~63
//mode:0,反白顯示;1,正常顯示
//size:選擇字體 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函數
u32 oled_pow(u8 m,u8 n)
{u32 result=1; while(n--)result*=m; return result;
} //x,y :起點坐標
//len :數字的位數
//size:字體大小
//mode:模式 0,填充模式;1,疊加模式
//num:數值(0~4294967295);
void OLED_ShowNum(u8 x,u8 y,u32 num,u8 len,u8 size)
{ u8 t,temp;u8 enshow=0; for(t=0;t<len;t++){temp=(num/oled_pow(10,len-t-1))%10;if(enshow==0&&t<(len-1)){if(temp==0){OLED_ShowChar(x+(size/2)*t,y,' ');continue;}else enshow=1; }OLED_ShowChar(x+(size/2)*t,y,temp+'0'); }
} //顯示一個字符號串
void OLED_ShowString(u8 x,u8 y,u8 *chr)
{unsigned char j=0;while (chr[j]!='\0'){ OLED_ShowChar(x,y,chr[j]);x+=8;if(x>120){x=0;y+=2;}j++;}
}//顯示漢字
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推挽輸出 GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP; //推挽輸出GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_HIGH;//速度50MHzHAL_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 輸出高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 panelOLED_WR_Byte(0x00,OLED_CMD);//---set low column addressOLED_WR_Byte(0x10,OLED_CMD);//---set high column addressOLED_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 registerOLED_WR_Byte(0xCF,OLED_CMD); // Set SEG Output Current BrightnessOLED_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 displayOLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 dutyOLED_WR_Byte(0xD3,OLED_CMD);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)OLED_WR_Byte(0x00,OLED_CMD);//-not offsetOLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequencyOLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/SecOLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge periodOLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 ClockOLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configurationOLED_WR_Byte(0x12,OLED_CMD);OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomhOLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect LevelOLED_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/disableOLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disableOLED_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 panelOLED_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); //溫OLED_ShowCHinese(15,0,4); //度OLED_ShowString(30,0,":");//:OLED_ShowCHinese(65,0,1); //濕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,":");//: }
