完 成如下应用功能编程，并用嵌入式开发板验证是否正确: 1系统待机时，LED红灯常亮，其它功能均不工作。 2按下启动按键key0，设备启动，LED绿灯常亮，红灯灭。 3按下油泵当位调节按键key1，可模拟调节油泵档位，按一下油 泵输出一档(高电平占比10%)，按两下油泵输出2档(高电平占比20% 按三下油泵输出3档(高电平占比30%)，直到按+下油泵输出10档(高 电平占比20%)，再次按下按键时油泵恢复到1档(高电平占比10%);(注:油泵控制采用引脚PB10) 4按下风机启动按键key2时，引脚PB11控制风机以50%占空比吹 风; 5为防止系统意外跑飞，设置5S定时看门狗，利用按键key_up触 发外部中断0，在外部中断0中实现看门狗喂狗。

好的，这是一道嵌入式系统的题目，需要用到开发板和编程语言来实现。

以下是参考代码，假设开发板使用的是STM32F103C8T6：

#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_tim.h"
#include "misc.h"

#define LED_RED GPIO_Pin_13
#define LED_GREEN GPIO_Pin_14
#define KEY0 GPIO_Pin_0
#define KEY1 GPIO_Pin_1
#define KEY2 GPIO_Pin_2
#define OIL_PUMP GPIO_Pin_10
#define FAN GPIO_Pin_11

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

void RCC_Configuration(void)
{
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
}

void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  GPIO_InitStructure.GPIO_Pin = LED_RED | LED_GREEN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = KEY0 | KEY1 | KEY2;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = OIL_PUMP | FAN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
}

void TIM3_PWM_Init(void)
{
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  TIM_OCInitTypeDef TIM_OCInitStructure;

  TIM_DeInit(TIM3);
  TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
  TIM_OCStructInit(&TIM_OCInitStructure);

  TIM_TimeBaseStructure.TIM_Period = 999;
  TIM_TimeBaseStructure.TIM_Prescaler = 719;
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 500;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC1Init(TIM3, &TIM_OCInitStructure);

  TIM_Cmd(TIM3, ENABLE);
}

void EXTI_Configuration(void)
{
  EXTI_InitTypeDef EXTI_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;

  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_Rising;
  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);
}

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

int main(void)
{
  RCC_Configuration();
  GPIO_Configuration();
  TIM3_PWM_Init();
  EXTI_Configuration();

  TIM_SetCompare1(TIM3, 100);

  GPIO_SetBits(GPIOB, LED_RED);

  while (1)
  {
    if (GPIO_ReadInputDataBit(GPIOA, KEY0) == 0)
    {
      GPIO_ResetBits(GPIOB, LED_RED);
      GPIO_SetBits(GPIOB, LED_GREEN);
    }
    else
    {
      GPIO_SetBits(GPIOB, LED_RED);
      GPIO_ResetBits(GPIOB, LED_GREEN);
    }

    if (GPIO_ReadInputDataBit(GPIOA, KEY1) == 0)
    {
      static uint8_t oil_pump_state = 0;
      oil_pump_state++;
      if (oil_pump_state > 10)
      {
        oil_pump_state = 1;
      }
      uint16_t pulse_width = (uint16_t)(oil_pump_state * 100);
      TIM_SetCompare1(TIM3, pulse_width);
      Delay(1000000);
    }

    if (GPIO_ReadInputDataBit(GPIOA, KEY2) == 0)
    {
      GPIO_SetBits(GPIOB, FAN);
    }
    else
    {
      GPIO_ResetBits(GPIOB, FAN);
    }

    Delay(1000000);
  }
}

请注意，这只是参考代码，您需要根据自己的开发板和需求来进行修改和适配。另外，如果您不熟悉嵌入式系统和编程，建议您先学习相关知识再进行实现。