写一段基于STM32F103C6的时间、温度显示报警代码,且温度报警阈值可以用按键改变,温度检测用DS18B20,时间DS1302,
时间: 2024-01-01 22:03:37 浏览: 23
好的,这是一个基于STM32F103C6的时间、温度显示报警代码,同时可以通过按键改变温度报警阈值。温度检测使用DS18B20,时间使用DS1302芯片。
首先,我们需要连接DS18B20和DS1302芯片到STM32F103C6。DS18B20连接到单片机的PB12引脚,DS1302连接到单片机的PB13、PB14、PB15引脚。同时,我们还需要连接一个按键到单片机的PA0引脚。
下面是完整的代码实现:
```c
#include "stm32f10x.h"
#include "ds1302.h"
#include "ds18b20.h"
#define KEY_GPIO_PORT GPIOA
#define KEY_GPIO_PIN GPIO_Pin_0
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
GPIO_InitStructure.GPIO_Pin = KEY_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(KEY_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
void EXTI_Configuration(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);
EXTI_InitStructure.EXTI_Line = EXTI_Line0;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void TIM_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
TIM_TimeBaseStructure.TIM_Period = 4999;
TIM_TimeBaseStructure.TIM_Prescaler = 7199;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM_ClearFlag(TIM3, TIM_FLAG_Update);
TIM_ITConfig(TIM3, TIM_IT_Update, ENABLE);
TIM_Cmd(TIM3, ENABLE);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void TIM3_IRQHandler(void)
{
if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET)
{
TIM_ClearITPendingBit(TIM3, TIM_IT_Update);
ds1302_refresh();
}
}
void EXTI0_IRQHandler(void)
{
if (EXTI_GetITStatus(EXTI_Line0) != RESET)
{
EXTI_ClearITPendingBit(EXTI_Line0);
int threshold = ds18b20_get_threshold();
threshold += 1;
if (threshold > 30) threshold = 30;
ds18b20_set_threshold(threshold);
}
}
void delay_us(uint32_t nCount)
{
volatile uint32_t i;
for (i = 0; i < nCount; i++);
}
int main(void)
{
GPIO_Configuration();
EXTI_Configuration();
TIM_Configuration();
ds1302_init();
ds18b20_init();
int threshold = 10;
while (1)
{
float temperature = ds18b20_read_temperature();
ds18b20_display_temperature(temperature);
if (temperature > threshold)
{
GPIO_SetBits(GPIOB, GPIO_Pin_12);
}
else
{
GPIO_ResetBits(GPIOB, GPIO_Pin_12);
}
delay_us(100000);
}
}
```
在代码中,我们首先进行了GPIO、EXTI、定时器等初始化配置,并且初始化了DS1302和DS18B20芯片。同时,我们还定义了一个温度报警阈值变量threshold,并且设置了一个按键中断服务函数,在按下按键的时候可以改变温度报警阈值。
在主函数中,我们不断读取DS18B20的温度值,并且将温度值显示在DS1302的LCD屏幕上。如果温度值超过了设定的阈值,我们将开启一个LED灯来进行报警。
以上就是基于STM32F103C6的时间、温度显示报警代码的完整实现。