STM32温度报警传感器代码(共19页)

1、精选优质文档-倾情为你奉上主函数 、main.c#include "led.h"#include "delay.h"#include "sys.h"#include "usart.h"#include "lcd.h"#include "ds18b20.h"#include "key.h"#include <string.h>#include <stdio.h>#include <stdlib.h>int temp_low

2、 = 22;int temp_high = 32;int zanshi_low=0;int zanshi_hign=0;void TIM3_Int_Init(u16 arr,u16 psc) TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;NVIC_InitTypeDef NVIC_InitStructure;RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); /时钟使能TIM_TimeBaseStructure.TIM_Period = arr; /设置在下一个更新事件装入活动的自动重装载寄存器

3、周期的值 计数到5000为500msTIM_TimeBaseStructure.TIM_Prescaler =psc; /设置用来作为TIMx时钟频率除数的预分频值 10Khz的计数频率 TIM_TimeBaseStructure.TIM_ClockDivision = 0; /设置时钟分割:TDTS = Tck_timTIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; /TIM向上计数模式TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure); /根据TIM_TimeBaseIn

4、itStruct中指定的参数初始化TIMx的时间基数单位 TIM_ITConfig( /使能或者失能指定的TIM中断TIM3, /TIM2TIM_IT_Update ,ENABLE /使能);NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn; /TIM3中断NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; /先占优先级0级NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; /从优先级3级NVIC_InitStructure.NVIC_I

5、RQChannelCmd = ENABLE; /IRQ通道被使能NVIC_Init(&NVIC_InitStructure); /根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器TIM_Cmd(TIM3, ENABLE); /使能TIMx外设 u8 flag=0; int main(void) u8 t = 0; u8 shuzu20;u8 keyvalue=0;u8 gaibianshui=0; short temperature; delay_init(); /延时函数初始化 uart_init(9600); /串口初始化为9600NVIC_PriorityG

6、roupConfig(NVIC_PriorityGroup_2);/ 设置中断优先级分组2 LED_Init(); /初始化与LED连接的硬件接口TIM3_Int_Init(9999,7199);/10Khz的计数频率，计数到5000为500ms LCD_Init(); POINT_COLOR = RED; /设置字体为红色 LCD_ShowString(0, 50, 200, 16, 16, "STM32 test");LCD_ShowString(0, 70, 200, 16, 16, "name: zhang qi qi "); /LCD_Show

7、String(0,90,200,16,16,"Max 32 C Min 26 C"); memset(shuzu, 0, 20); sprintf(shuzu, "Max is %2d C,Min is %2d C", temp_high, temp_low); LCD_ShowString(0, 90, 200, 16, 16, shuzu); while (DS18B20_Init() /DS18B20初始化 LCD_ShowString(0, 130, 200, 16, 16, "DS18B20 Error"); delay_m

8、s(200); LCD_Fill(0, 130, 239, 130 + 16, WHITE); delay_ms(200); POINT_COLOR = BLUE; /设置字体为蓝色 LCD_ShowString(0, 110, 260, 16, 16, "The temperature is: . C now ");LCD_ShowChar(0+25*8,110,',',16,0);LCD_ShowChar(0+29*8,110,'!',16,0); while (1) POINT_COLOR = BLUE; /设置字体为蓝色 if (t

9、% 10 = 0) /每100ms读取一次 t = 0; temperature = DS18B20_Get_Temp(); if (temperature < 0) LCD_ShowChar(0 + 40, 150, '-', 16, 0); /显示负号 temperature = -temperature; /转为正数 else LCD_ShowChar(0 + 40, 150, ' ', 16, 0); /去掉负号memset(shuzu, 0, 20);sprintf(shuzu, "The temperature is:%3d.%1dC

10、", temperature / 10, temperature % 10);LCD_ShowString(0, 110, 200, 16, 16, shuzu); delay_ms(10);/判断温度zanshi_low=temp_low*10;zanshi_hign=temp_high*10;if(temperature<zanshi_low)|(temperature>zanshi_hign)if(temperature<zanshi_low)flag=1;printf("chaoxiaxian");if(temperature>za

11、nshi_hign)flag=2;printf("chaoshangxian"); elseflag=0;LED0=1; /正常情况灯不亮 LED1=1;/获取温度时间控制t t+;/浏览开关KEY_Init();delay_ms(10);keyvalue=KEY_Scan(0);if(keyvalue!=0)if(keyvalue=3)gaibianshui=(gaibianshui+1)%3;if(gaibianshui=1) /改变上限if(keyvalue=2) /key1按下temp_high+;memset(shuzu, 0, 20);sprintf(shuzu

12、, "Max is %2d C,Min is %2d C", temp_high, temp_low);LCD_ShowString(0, 90, 200, 16, 16, shuzu);if(keyvalue=1) /key0按下temp_high-;memset(shuzu, 0, 20);sprintf(shuzu, "Max is %2d C,Min is %2d C", temp_high, temp_low);LCD_ShowString(0, 90, 200, 16, 16, shuzu);if(gaibianshui=2) /改变上限if

13、(keyvalue=2) /key1按下temp_low+;memset(shuzu, 0, 20);sprintf(shuzu, "Max is %2d C,Min is %2d C", temp_high, temp_low);LCD_ShowString(0, 90, 200, 16, 16, shuzu);if(keyvalue=1) /key0按下temp_low-;memset(shuzu, 0, 20);sprintf(shuzu, "Max is %2d C,Min is %2d C", temp_high, temp_low);LCD_

14、ShowString(0, 90, 200, 16, 16, shuzu);keyvalue=0; void TIM3_IRQHandler(void) /TIM3中断if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) /检查指定的TIM中断发生与否:TIM 中断源 TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); /清除TIMx的中断待处理位:TIM 中断源 /温度不正常处理灯if(flag=1)LED0 = !LED0;if(flag=2)LED1 = !LED1;LED 函数led.c#includ

15、e "led.h"void LED_Init(void) GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOD, ENABLE); /使能PA,PD端口时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; /LED0->PA.8 端口配置 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; /推挽输出 GPIO_InitStructure.

16、GPIO_Speed = GPIO_Speed_50MHz; /IO口速度为50MHz GPIO_Init(GPIOA, &GPIO_InitStructure); /根据设定参数初始化GPIOA.8 GPIO_SetBits(GPIOA,GPIO_Pin_8); /PA.8 输出高 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; /LED1->PD.2 端口配置, 推挽输出 GPIO_Init(GPIOD, &GPIO_InitStructure); /推挽输出 ，IO口速度为50MHz GPIO_SetBits(GPIOD,GPIO

17、_Pin_2); /PD.2 输出高 温度代码 s18b20.c#include "ds18b20.h"#include "delay.h"void DS18B20_Rst(void) DS18B20_IO_OUT(); /SET PA0 OUTPUT DS18B20_DQ_OUT=0; /拉低DQ delay_us(750); /拉低750us DS18B20_DQ_OUT=1; /DQ=1 delay_us(15); /15US/等待DS18B20的回应/返回1:未检测到DS18B20的存在/返回0:存在u8 DS18B20_Check(void)

18、u8 retry=0;DS18B20_IO_IN();/SET PA0 INPUT while (DS18B20_DQ_IN&&retry<200)retry+;delay_us(1); if(retry>=200)return 1;else retry=0; while (!DS18B20_DQ_IN&&retry<240)retry+;delay_us(1);if(retry>=240)return 1; return 0;/从DS18B20读取一个位/返回值：1/0u8 DS18B20_Read_Bit(void) / read o

19、ne bit u8 data;DS18B20_IO_OUT();/SET PA0 OUTPUT DS18B20_DQ_OUT=0; delay_us(2); DS18B20_DQ_OUT=1; DS18B20_IO_IN();/SET PA0 INPUTdelay_us(12);if(DS18B20_DQ_IN)data=1; else data=0; delay_us(50); return data;/从DS18B20读取一个字节/返回值：读到的数据u8 DS18B20_Read_Byte(void) / read one byte u8 i,j,dat; dat=0;for (i=1;i

20、<=8;i+) j=DS18B20_Read_Bit(); dat=(j<<7)|(dat>>1); return dat;/写一个字节到DS18B20/dat：要写入的字节void DS18B20_Write_Byte(u8 dat) u8 j; u8 testb;DS18B20_IO_OUT();/SET PA0 OUTPUT; for (j=1;j<=8;j+) testb=dat&0x01; dat=dat>>1; if (testb) DS18B20_DQ_OUT=0;/ Write 1 delay_us(2); DS18B20

21、_DQ_OUT=1; delay_us(60); else DS18B20_DQ_OUT=0;/ Write 0 delay_us(60); DS18B20_DQ_OUT=1; delay_us(2); /开始温度转换void DS18B20_Start(void)/ ds1820 start convert DS18B20_Rst(); DS18B20_Check(); DS18B20_Write_Byte(0xcc);/ skip rom DS18B20_Write_Byte(0x44);/ convert /初始化DS18B20的IO口 DQ 同时检测DS的存在/返回1:不存在/返回0:

22、存在 u8 DS18B20_Init(void) GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); /使能PORTA口时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;/PORTA0 推挽输出 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &a

23、mp;GPIO_InitStructure); GPIO_SetBits(GPIOA,GPIO_Pin_2); /输出1DS18B20_Rst();return DS18B20_Check(); /从ds18b20得到温度值/精度：0.1C/返回值：温度值 （-5501250） short DS18B20_Get_Temp(void) u8 temp; u8 TL,TH; short tem; DS18B20_Start (); / ds1820 start convert DS18B20_Rst(); DS18B20_Check(); DS18B20_Write_Byte(0xcc);/ s

24、kip 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;/温度为负 else temp=1;/温度为正 tem=TH; /获得高八位 tem<<=8; tem+=TL;/获得底八位 tem=(float)tem*0.625;/转换 if(temp)return tem; /返回温度值else return -tem; 键盘代码key.c #include "k

25、ey.h"#include "delay.h" /按键初始化函数 /PA15和PC5 设置成输入void KEY_Init(void)GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC,ENABLE);/使能PORTA,PORTC时钟GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);/关闭jtag，使能SWD，可以用SWD模式调试GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;/PA15GPIO_InitStructure.GPIO_Mode = GPIO_