Proteus仿真版本:proteus 8.9
程序編譯器:keil 5
編程語言:C語言
設(shè)計編號:C0054
功能要求
運(yùn)用所學(xué)知識,完成基于STM32的溫控系統(tǒng)設(shè)計?;竟δ馨?/p>
- LCD1602屏幕顯示當(dāng)前溫度及上限閾值;
- 當(dāng)溫度超過上限值時LED紅燈亮,蜂鳴器報警,風(fēng)扇開始轉(zhuǎn)動;
- 可通過按鍵調(diào)節(jié)溫度上限閾值;
- 溫度過高時啟動繼電器控制的風(fēng)扇,實(shí)現(xiàn)自動保護(hù)。
注意:
本設(shè)計是proteus仿真設(shè)計,并未做實(shí)物驗證,意味著不確定源程序和原理圖是否能在實(shí)物上正常使用,可能有BUG,故原理圖及PCB僅供參考。
仿真圖
開始仿真:LCD屏顯示實(shí)時溫度和檢測值,同時工作指示燈點(diǎn)亮。
實(shí)時溫度大于監(jiān)測值,馬達(dá)轉(zhuǎn)動,紅燈亮起,蜂鳴器報警。
原理圖
注意,此原理圖由仿真圖繪制而來,沒做實(shí)物驗證,僅供參考
PCB
注意,此PCB圖由仿真圖繪制而來,沒做實(shí)物驗證,僅供參考
源程序
main函數(shù)
int main(void)
{
short temperature = 0;
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
delay_init(10); //初始化定時器
TIM3_Init(2400-1, 72-1); // 10ms
Key_Init();
JDQ_Init();
LCD_Init();
LCD_write_string(0, 0, "Temp Value:");
LCD_write_string(0, 1, "Temp High :");
while(1)
{
do
{
DS18B20_Init();
HAL_Delay(100);
temperature = DS18B20_Get_Temp();
HAL_Delay(200);
}
while(temperature == 0 || temperature > 999 || temperature == 850);
temp_table[0] = temperature % 1000 / 100 + 0x30;
temp_table[1] = temperature % 100 / 10 + 0x30;
temp_table[2] = '.';
temp_table[3] = temperature % 10 + 0x30;
limt_table[0] = temp_max / 10 + 0x30;
limt_table[1] = temp_max % 10 + 0x30;
LCD_write_string(12, 0, (char*)temp_table);
LCD_write_string(12, 1, (char*)limt_table);
}
}
DS18B20驅(qū)動程序
#include "ds18b20.h"
#include "delay.h"
//復(fù)位DS18B20
void DS18B20_Rst(void)
{
DS18B20_IO_OUT(); //設(shè)置為輸出
DS18B20_DQ_OUT(0); //拉低DQ
delay_us(740); //拉低750us
DS18B20_DQ_OUT(1); //DQ=1
delay_us(15); //15US
}
//等待DS18B20的回應(yīng)
//返回1:未檢測到DS18B20的存在
//返回0:存在
uint8_t DS18B20_Check(void)
{
uint8_t retry = 0;
DS18B20_IO_IN(); //設(shè)置為輸入
while (DS18B20_DQ_IN&&retry < 200)
{
retry ++;
delay_us(2);
};
if(retry >= 200)
return 1;
else
retry = 0;
while (!DS18B20_DQ_IN&&retry < 240)
{
retry++;
delay_us(2);
};
if(retry>=240)
return 1;
return 0;
}
//從DS18B20讀取一個位
//返回值:1/0
uint8_t DS18B20_Read_Bit(void)
{
uint8_t data = 0;
DS18B20_IO_OUT(); //設(shè)置為輸出
DS18B20_DQ_OUT(0);
delay_us(2);
DS18B20_DQ_OUT(1);
DS18B20_IO_IN(); //設(shè)置為輸入
delay_us(13);
if(DS18B20_DQ_IN)
data=1;
else
data=0;
delay_us(50);
return data;
}
//從DS18B20讀取一個字節(jié)
//返回值:讀到的數(shù)據(jù)
uint8_t DS18B20_Read_Byte(void)
{
uint8_t i, j = 0, dat = 0;
for (i=1;i<=8;i++)
{
j=DS18B20_Read_Bit();
dat=(j<<7)|(dat>>1);
}
return dat;
}
//寫一個字節(jié)到DS18B20
//dat:要寫入的字節(jié)
void DS18B20_Write_Byte(uint8_t dat)
{
uint8_t j;
uint8_t testb = 0;
DS18B20_IO_OUT(); //設(shè)置為輸出
for (j=1;j<=8;j++)
{
testb = dat&0x01;
dat = dat>>1;
if(testb) // 寫1
{
DS18B20_DQ_OUT(0);
delay_us(2);
DS18B20_DQ_OUT(1);
delay_us(49);
}
else //寫0
{
DS18B20_DQ_OUT(0);
delay_us(49);
DS18B20_DQ_OUT(1);
delay_us(2);
}
}
}
//開始溫度轉(zhuǎn)換
void DS18B20_Start(void)
{
DS18B20_Rst();
DS18B20_Check();
DS18B20_Write_Byte(0xcc);// skip rom
DS18B20_Write_Byte(0x44);// convert
}
//初始化DS18B20的IO口 DQ 同時檢測DS的存在
//返回1:不存在
//返回0:存在
uint8_t DS18B20_Init(void)
{
GPIO_InitTypeDef GPIO_Initure;
DS18B20_DATA_CLK(); //開啟GPIOA時鐘
GPIO_Initure.Pin=DS18B20_DATA_PIN; //PA0
GPIO_Initure.Mode=GPIO_MODE_OUTPUT_PP; //推挽輸出
GPIO_Initure.Pull=GPIO_PULLUP; //上拉
GPIO_Initure.Speed=GPIO_SPEED_FREQ_LOW;//高速
HAL_GPIO_Init(DS18B20_DATA_PORT,&GPIO_Initure); //初始化
DS18B20_Rst();
return DS18B20_Check();
}
//從ds18b20得到溫度值
//精度:0.1C
//返回值:溫度值 (-550~1250)
short DS18B20_Get_Temp(void)
{
uint8_t temp = 0;
uint8_t TL = 0,TH = 0;
short tem = 0;
DS18B20_Start (); //開始轉(zhuǎn)換
DS18B20_Rst();
DS18B20_Check();
DS18B20_Write_Byte(0xcc); // skip rom
DS18B20_Write_Byte(0xbe); // convert
TL=DS18B20_Read_Byte(); // LSB
TH=DS18B20_Read_Byte(); // MSB
if(TH > 7)
{
TH = ~TH;
TL = ~TL;
temp = 0;//溫度為負(fù)
}
else
temp = 1;//溫度為正
tem = TH; //獲得高八位
tem <<= 8;
tem += TL;//獲得底八位
tem=(double)tem*0.625;//轉(zhuǎn)換
if(temp)
return tem; //返回溫度值
else
return -tem;
}
LCD1602顯示函數(shù)
#include "lcd1602.h"
#define DELAY_2N 0
void lcd_delay_us(unsigned int t)
{
unsigned int i, j;
for(i = 10; i > 0; i--)
for(j = t; j > 0; j--);
}
void lcd_delay_ms(unsigned int t)
{
unsigned int i;
for(i = t; i > 0; i--)
lcd_delay_us(10);
}
//==================================================
void LCD_Init(void)
{
GPIO_InitTypeDef GPIO_Initure;
LCD_CTRL_CLK();
LCD_DATA_CLK();
GPIO_Initure.Pin = LCD_RS_PIN|LCD_RW_PIN|LCD_EN_PIN;
GPIO_Initure.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_Initure.Pull = GPIO_PULLUP;
GPIO_Initure.Speed = GPIO_SPEED_FREQ_MEDIUM;
HAL_GPIO_Init(LCD_CTRL_PORT, &GPIO_Initure);
GPIO_Initure.Pin = LCD_DATA0_PIN|LCD_DATA1_PIN|LCD_DATA2_PIN|LCD_DATA3_PIN|LCD_DATA4_PIN|LCD_DATA5_PIN|LCD_DATA6_PIN|LCD_DATA7_PIN;
HAL_GPIO_Init(LCD_DATA_PORT, &GPIO_Initure);
LCD_RW(0); //讀寫位直接低電平,只寫不讀
/*********************液晶初始化**************************/
lcd_delay_us(340);
LCD_RS(0);
LCD_write_cmd(0x38); // 8bit顯示模式,2行,5x7字體
lcd_delay_ms(4);
LCD_write_cmd(0x08); // 顯示關(guān)閉
lcd_delay_ms(4);
LCD_write_cmd(0x01); // 顯示清屏
lcd_delay_ms(4);
LCD_write_cmd(0x06); // 顯示光標(biāo)移動設(shè)置
lcd_delay_ms(4);
LCD_write_cmd(0x0c); // 顯示開,光標(biāo)開,光標(biāo)閃爍
lcd_delay_ms(4);
LCD_write_cmd(0x01); //清屏
lcd_delay_ms(4);
}
/*--------------------------------------------------
函數(shù)說明:寫命令到液晶
---------------------------------------------------*/
void LCD_write_cmd(unsigned char cmd)
{
LCD_RS(0);
LCD_Write_byte(cmd);
lcd_delay_us(340);
}
/*--------------------------------------------------
函數(shù)說明:寫數(shù)據(jù)到液晶
---------------------------------------------------*/
void LCD_write_data(unsigned char w_data)
{
LCD_RS(1);
LCD_Write_byte(w_data);
lcd_delay_us(340);
}
/*--------------------------------------------------
函數(shù)說明:寫4bit到液晶
--------------------------------------------------*/
void LCD_Write_byte(unsigned char num)
{
if (num&0x01)
data0(1);
else
data0(0);
if (num&0x02)
data1(1);
else
data1(0);
if (num&0x04)
data2(1);
else
data2(0);
if (num&0x08)
data3(1);
else
data3(0);
if (num&0x10)
data4(1);
else
data4(0);
if (num&0x20)
data5(1);
else
data5(0);
if (num&0x40)
data6(1);
else
data6(0);
if (num&0x80)
data7(1);
else
data7(0);
lcd_delay_us(340);
LCD_EN(1);
lcd_delay_us(340);
LCD_EN(0);
lcd_delay_us(340);
}
/*----------------------------------------------------
LCD_set_xy : 設(shè)置LCD顯示的起始位置
輸入?yún)?shù):x、y : 顯示字符串的位置,X:0-15,Y:0-1
-----------------------------------------------------*/
void LCD_set_xy( unsigned char x, unsigned char y )
{
unsigned char address = 0;
if (y==0)
{
address=0x80+x;
}
else
{
address=0xc0+x;
}
// y ? (address=0xc0+x): (address=0x80+x) ;
LCD_write_cmd(address);
}
/*---------------------------------------------------
LCD_write_string : 英文字符串顯示函數(shù)
輸入?yún)?shù):*s :英文字符串指針;
X、Y : 顯示字符串的位置
---------------------------------------------------*/
void LCD_write_string(unsigned char X,unsigned char Y, char *s)
{
LCD_set_xy(X,Y);
while (*s)
{
LCD_write_data(*s);
s++;
}
}
//=======================================================
void LCD_wstring(unsigned char X,unsigned char *s)
{
LCD_write_cmd(X);
while (*s)
{
LCD_write_data(*s);
s++;
}
}
開發(fā)資料
0.常見使用問題及解決方法–必讀?。。。?/p>
- 程序源碼
- Proteus仿真
- 原理圖
- PCB
- 源文件截圖
- 參考文檔
- 講解視頻
8.功能要求
Altium Designer 軟件資料
DS18B20(中文).pdf
KEIL軟件資料
Proteus軟件資料
單片機(jī)學(xué)習(xí)資料
答辯技巧
設(shè)計報告常用描述
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