stm32四层电梯控制系统仿真电梯外每层一个按钮呼叫电梯，电梯内四个按钮对应四层控制电梯上下代码

以下是基于STM32的四层电梯控制系统的上下行代码，其中包括了电梯外每层一个按钮呼叫电梯和电梯内四个按钮对应四层控制的实现：

#include "stm32f10x.h"

#define UP 1
#define DOWN 0

int current_floor = 1;
int target_floor = 1;
int direction = UP;

void delay(int time) {
    int i;
    for(i = 0; i < time; i++);
}

void move_up() {
    GPIO_WriteBit(GPIOA, GPIO_Pin_0, Bit_SET); // Turn on UP indicator
    while(current_floor < target_floor) {
        // Move up one floor
        current_floor++;
        delay(1000); // Wait for 1 second
    }
    GPIO_WriteBit(GPIOA, GPIO_Pin_0, Bit_RESET); // Turn off UP indicator
}

void move_down() {
    GPIO_WriteBit(GPIOA, GPIO_Pin_1, Bit_SET); // Turn on DOWN indicator
    while(current_floor > target_floor) {
        // Move down one floor
        current_floor--;
        delay(1000); // Wait for 1 second
    }
    GPIO_WriteBit(GPIOA, GPIO_Pin_1, Bit_RESET); // Turn off DOWN indicator
}

void elevator_control() {
    // Check if there is a request from inside the elevator
    if(GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_0)) {
        target_floor = 1;
    } else if(GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_1)) {
        target_floor = 2;
    } else if(GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_2)) {
        target_floor = 3;
    } else if(GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_3)) {
        target_floor = 4;
    }

    // Check if there is a request from outside the elevator
    if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_0)) {
        if(current_floor == 1) {
            target_floor = 1;
        } else if(current_floor > 1) {
            target_floor = 1;
            direction = DOWN;
        }
    } else if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_1)) {
        if(current_floor == 2) {
            target_floor = 2;
        } else if(current_floor > 2) {
            target_floor = 2;
            direction = DOWN;
        } else if(current_floor < 2) {
            target_floor = 2;
            direction = UP;
        }
    } else if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_2)) {
        if(current_floor == 3) {
            target_floor = 3;
        } else if(current_floor < 3) {
            target_floor = 3;
            direction = UP;
        } else if(current_floor > 3) {
            target_floor = 3;
            direction = DOWN;
        }
    } else if(GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_3)) {
        if(current_floor == 4) {
            target_floor = 4;
        } else if(current_floor < 4) {
            target_floor = 4;
            direction = UP;
        }
    }

    // Move the elevator to the target floor
    if(target_floor > current_floor) {
        move_up();
    } else if(target_floor < current_floor) {
        move_down();
    }

    // Open the door
    GPIO_WriteBit(GPIOA, GPIO_Pin_2, Bit_SET);
    delay(2000); // Wait for 2 seconds
    GPIO_WriteBit(GPIOA, GPIO_Pin_2, Bit_RESET);

    // Change the direction
    if(target_floor == 1) {
        direction = UP;
    } else if(target_floor == 4) {
        direction = DOWN;
    } else if(direction == UP && current_floor == 4) {
        direction = DOWN;
    } else if(direction == DOWN && current_floor == 1) {
        direction = UP;
    }
}

int main() {
    // Initialize GPIO pins
    GPIO_InitTypeDef gpio;
    gpio.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2;
    gpio.GPIO_Mode = GPIO_Mode_Out_PP;
    gpio.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &gpio);

    gpio.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
    gpio.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(GPIOB, &gpio);

    gpio.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
    gpio.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_Init(GPIOC, &gpio);

    while(1) {
        elevator_control();
    }
}

该代码基于GPIO控制电梯运行和指示灯的状态，可以根据实际需求进行修改。需要注意的是，该代码仅供参考，具体实现可能需要针对实际情况进行调整。