STM32F103C8T6单片机软件实现按键1进入设置温度；按键2控制水泵水过滤的开停；按键3控制LED灯的开关；按键4负责温度值的具体设置文字说明

以下是STM32F103C8T6单片机软件实现按键控制的代码示例：

#include "stm32f10x.h"

#define KEY1_GPIO_PIN GPIO_Pin_0
#define KEY2_GPIO_PIN GPIO_Pin_1
#define KEY3_GPIO_PIN GPIO_Pin_2
#define KEY4_GPIO_PIN GPIO_Pin_3

#define PUMP_GPIO_PIN GPIO_Pin_4
#define LED_GPIO_PIN GPIO_Pin_5

#define MAX_TEMPERATURE 50

GPIO_InitTypeDef GPIO_InitStructure;

void Delay(__IO uint32_t nCount)
{
while(nCount--)
{
}
}

void Key1_Handler(void)
{
// 进入设置温度模式
}

void Key2_Handler(void)
{
if(GPIO_ReadOutputDataBit(GPIOA, PUMP_GPIO_PIN))
{
GPIO_ResetBits(GPIOA, PUMP_GPIO_PIN);
}
else
{
GPIO_SetBits(GPIOA, PUMP_GPIO_PIN);
}
}

void Key3_Handler(void)
{
if(GPIO_ReadOutputDataBit(GPIOA, LED_GPIO_PIN))
{
GPIO_ResetBits(GPIOA, LED_GPIO_PIN);
}
else
{
GPIO_SetBits(GPIOA, LED_GPIO_PIN);
}
}

void Key4_Handler(void)
{
// 温度设置文字说明
}

void EXTI0_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line0) != RESET)
{
EXTI_ClearITPendingBit(EXTI_Line0);
Key1_Handler();
}
}

void EXTI1_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line1) != RESET)
{
EXTI_ClearITPendingBit(EXTI_Line1);
Key2_Handler();
}
}

void EXTI2_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line2) != RESET)
{
EXTI_ClearITPendingBit(EXTI_Line2);
Key3_Handler();
}
}

void EXTI3_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line3) != RESET)
{
EXTI_ClearITPendingBit(EXTI_Line3);
Key4_Handler();
}
}

int main(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

GPIO_InitStructure.GPIO_Pin = KEY1_GPIO_PIN | KEY2_GPIO_PIN | KEY3_GPIO_PIN | KEY4_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = PUMP_GPIO_PIN | LED_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource1);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource2);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource3);

EXTI_InitStructure.EXTI_Line = EXTI_Line0 | EXTI_Line1 | EXTI_Line2 | EXTI_Line3;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x03;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

while(1)
{
// 温度检测和控制水泵
if(检测到温度超过设置温度)
{
GPIO_SetBits(GPIOA, PUMP_GPIO_PIN);
}
else
{
GPIO_ResetBits(GPIOA, PUMP_GPIO_PIN);
}

Delay(100000);
}
}