stm32f103c8t6使用4x4矩阵制作多级菜单的代码hal库

STM32F103C8T6是一款常用的ARM Cortex-M3单片机，使用HAL库可以方便地进行编程。下面是使用4x4矩阵制作多级菜单的代码示例：

#include "stm32f1xx_hal.h"

//定义菜单项结构体
typedef struct
{
    char *name;
    void (*action)(void);
    struct MenuItem *subMenu;
} MenuItem;

//定义菜单数组
MenuItem mainMenu[] = {
    {"Item1", NULL, NULL},
    {"Item2", NULL, NULL},
    {"SubMenu1", NULL, subMenu1},
    {"SubMenu2", NULL, subMenu2}
};

MenuItem subMenu1[] = {
    {"SubItem1", action1, NULL},
    {"SubItem2", action2, NULL},
    {"SubSubMenu1", NULL, subSubMenu1},
};

MenuItem subMenu2[] = {
    {"SubItem3", action3, NULL},
    {"SubItem4", action4, NULL},
};

MenuItem subSubMenu1[] = {
    {"SubSubItem1", action5, NULL},
    {"SubSubItem2", action6, NULL},
};

//定义矩阵按键对应的GPIO口和引脚
GPIO_TypeDef *rowPorts[] = {GPIOA, GPIOA, GPIOA, GPIOA};
uint16_t rowPins[] = {GPIO_PIN_0, GPIO_PIN_1, GPIO_PIN_2, GPIO_PIN_3};
GPIO_TypeDef *colPorts[] = {GPIOA, GPIOA, GPIOA, GPIOA};
uint16_t colPins[] = {GPIO_PIN_4, GPIO_PIN_5, GPIO_PIN_6, GPIO_PIN_7};

//读取矩阵按键状态
uint16_t readKeyState()
{
    uint16_t keyState = 0;
    for (int i = 0; i < 4; i++)
    {
        HAL_GPIO_WritePin(rowPorts[i], rowPins[i], GPIO_PIN_RESET);
        for (int j = 0; j < 4; j++)
        {
            if (HAL_GPIO_ReadPin(colPorts[j], colPins[j]) == GPIO_PIN_RESET)
            {
                keyState |= 1 << (i * 4 + j);
            }
        }
        HAL_GPIO_WritePin(rowPorts[i], rowPins[i], GPIO_PIN_SET);
    }
    return keyState;
}

//显示菜单项
void displayMenuItem(MenuItem *menu)
{
    printf("%s\n", menu->name);
}

//显示菜单
void displayMenu(MenuItem *menu)
{
    int i = 0;
    while (menu[i].name != NULL)
    {
        displayMenuItem(&menu[i]);
        i++;
    }
}

//选择菜单项
void selectMenuItem(MenuItem *menu)
{
    uint16_t keyState = 0;
    while (keyState == 0)
    {
        keyState = readKeyState();
    }
    int i = 0;
    while (menu[i].name != NULL)
    {
        if (keyState & (1 << i))
        {
            if (menu[i].action != NULL)
            {
                menu[i].action();
            }
            else if (menu[i].subMenu != NULL)
            {
                selectMenuItem(menu[i].subMenu);
            }
            break;
        }
        i++;
    }
}

//主函数
int main(void)
{
    HAL_Init();
    //初始化GPIO口和引脚
    GPIO_InitTypeDef GPIO_InitStruct = {0};
    for (int i = 0; i < 4; i++)
    {
        GPIO_InitStruct.Pin = rowPins[i];
        GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
        GPIO_InitStruct.Pull = GPIO_NOPULL;
        GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
        HAL_GPIO_Init(rowPorts[i], &GPIO_InitStruct);
        HAL_GPIO_WritePin(rowPorts[i], rowPins[i], GPIO_PIN_SET);

        GPIO_InitStruct.Pin = colPins[i];
        GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
        GPIO_InitStruct.Pull = GPIO_PULLUP;
        HAL_GPIO_Init(colPorts[i], &GPIO_InitStruct);
    }
    
    while (1)
    {
        displayMenu(mainMenu);
        selectMenuItem(mainMenu);
    }
}

以上是使用HAL库实现的STM32F103C8T6多级菜单代码，该代码可以通过4x4矩阵键盘进行选择操作。相关问题如下：