KEIL5用HAL库明明定义了函数，函数里定义好的变量好也有代码提示符，编译时却没定义

问题遇到的现象和发生背景

unsigned int speed_count=0;//ռ�ձȼ����� 50��һ����
char front_left_speed_duty=SPEED_DUTY;
char front_right_speed_duty=SPEED_DUTY;
char behind_left_speed_duty=SPEED_DUTY;
char behind_right_speed_duty=SPEED_DUTY;

unsigned char tick_5ms = 0;//5ms����������Ϊ�������Ļ�������
unsigned char tick_1ms = 0;//1ms����������Ϊ����Ļ���������
unsigned char tick_200ms = 0;//ˢ����ʾ

char ctrl_comm = COMM_STOP;//����ָ��
char ctrl_comm_last = COMM_STOP;//��һ�ε�ָ��
unsigned char continue_time=0;
unsigned char bt_rec_flag=0;//�������Ʊ�־λ

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */
void SearchRun(void);
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
//循迹函数
void SearchRun(void)
{
    if(SEARCH_M_IO == BLACK_AREA && SEARCH_L_IO == BLACK_AREA && SEARCH_R_IO == BLACK_AREA)
    {
        ctrl_comm = COMM_UP;
        return;
    }
}
/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_TIM2_Init();
  /* USER CODE BEGIN 2 */

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */
        
    /* USER CODE BEGIN 3 */
  }
  /* USER CODE END 3 */
}

KEIL5明明定义了函数，函数里定义好的变量好也有代码提示符，编译时却没定义

问题相关代码，请勿粘贴截图

打算在main.c前定义循迹函数，但是编译时却提示我没定义函数里的变量
在main.c while(1)循环体里面打函数的变量却有代码提示符，这是怎么回事

运行结果及报错内容

../Core/Src/main.c(71): error: #20: identifier "GPIO_Pin_6" is undefined
../Core/Src/main.c(71): error: #20: identifier "GPIO_Pin_4" is undefined

我的解答思路和尝试过的方法

定义的变量

#define SEARCH_M_PIN         GPIO_Pin_8
#define SEARCH_M_GPIO        GPIOG
#define SEARCH_M_IO         HAL_GPIO_ReadPin(SEARCH_M_GPIO, SEARCH_M_PIN)

#define SEARCH_R_PIN         GPIO_Pin_6
#define SEARCH_R_GPIO        GPIOG
#define SEARCH_R_IO         HAL_GPIO_ReadPin(SEARCH_R_GPIO, SEARCH_R_PIN)

#define SEARCH_L_PIN         GPIO_Pin_4
#define SEARCH_L_GPIO        GPIOG
#define SEARCH_L_IO          HAL_GPIO_ReadPin(SEARCH_L_GPIO, SEARCH_L_PIN)
#define BLACK_AREA 1
#define WHITE_AREA 0

我想要达到的结果

有个.h文件stm32f4xx_hal_conf.h，里面设置了启用哪些功能

你说的代码一直都存在，但如果没Enable该功能，会被屏蔽掉的

你好，题主
请问定义GPIO_Pin_6和GPIO_Pin_4这两个宏的位置是在哪个头文件呢？这个头文件是否有包含在main.c这个文件中呢？若没有被包含（include）进来的话，就会提示 "identifier "xxx" is undefined"

定义了，还得包含相关头文件才可以。C语言是按文件编译的，要保证每个使用都相关定义的C文件都能包含这些声明