stm32f103c8t6串口2发送AT+LOCATION=1指令给EC01g,并解析GPS,显示到屏幕,stm32库函数版本的代码

下面是基于STM32 HAL库的串口2发送AT指令并解析GPS数据的代码，供参考：

#include "stm32f1xx_hal.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define GPS_BUFFER_SIZE 256

UART_HandleTypeDef huart2;

char gps_buffer[GPS_BUFFER_SIZE];
int gps_buffer_index = 0;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART2_UART_Init(void);

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    if (huart->Instance == USART2)
    {
        if (gps_buffer_index < GPS_BUFFER_SIZE - 1)
        {
            gps_buffer[gps_buffer_index++] = huart->Instance->DR & 0xFF;
        }
    }
}

void clear_gps_buffer()
{
    memset(gps_buffer, 0, GPS_BUFFER_SIZE);
    gps_buffer_index = 0;
}

void send_at_command(char* command)
{
    HAL_UART_Transmit(&huart2, (uint8_t*)command, strlen(command), HAL_MAX_DELAY);
}

void parse_gps_data(char* gps_data)
{
    char* token = strtok(gps_data, ",");
    int count = 0;
    while (token != NULL)
    {
        if (count == 3) // latitude
        {
            float latitude = atof(token);
            printf("Latitude: %f\n", latitude);
        }
        else if (count == 4) // north or south
        {
            if (strcmp(token, "S") == 0)
            {
                printf("Direction: South\n");
            }
            else
            {
                printf("Direction: North\n");
            }
        }
        else if (count == 5) // longitude
        {
            float longitude = atof(token);
            printf("Longitude: %f\n", longitude);
        }
        else if (count == 6) // east or west
        {
            if (strcmp(token, "W") == 0)
            {
                printf("Direction: West\n");
            }
            else
            {
                printf("Direction: East\n");
            }
        }
        token = strtok(NULL, ",");
        count++;
    }
}

int main(void)
{
    HAL_Init();
    SystemClock_Config();
    MX_GPIO_Init();
    MX_USART2_UART_Init();

    while (1)
    {
        send_at_command("AT+LOCATION=1\r\n");
        HAL_Delay(1000);
        char* search_str = "+LOCATION:";
        char* ptr = strstr(gps_buffer, search_str);
        if (ptr != NULL)
        {
            ptr += strlen(search_str);
            parse_gps_data(ptr);
        }
        clear_gps_buffer();
        HAL_Delay(5000);
    }
}

void SystemClock_Config(void)
{
    RCC_OscInitTypeDef RCC_OscInitStruct = {0};
    RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

    /** Initializes the RCC Oscillators according to the specified parameters
    * in the RCC_OscInitTypeDef structure.
    */
    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
    {
        Error_Handler();
    }
    /** Initializes the CPU, AHB and APB buses clocks
    */
    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
    | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
    {
        Error_Handler();
    }
}

static void MX_USART2_UART_Init(void)
{
    huart2.Instance = USART2;
    huart2.Init.BaudRate = 115200;
    huart2.Init.WordLength = UART_WORDLENGTH_8B;
    huart2.Init.StopBits = UART_STOPBITS_1;
    huart2.Init.Parity = UART_PARITY_NONE;
    huart2.Init.Mode = UART_MODE_TX_RX;
    huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    huart2.Init.OverSampling = UART_OVERSAMPLING_16;
    if (HAL_UART_Init(&huart2) != HAL_OK)
    {
        Error_Handler();
    }
    HAL_UART_Receive_IT(&huart2, (uint8_t*)gps_buffer, 1);
}

static void MX_GPIO_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStruct = {0};

    /* GPIO Ports Clock Enable */
    __HAL_RCC_GPIOC_CLK_ENABLE();
    __HAL_RCC_GPIOD_CLK_ENABLE();
    __HAL_RCC_GPIOA_CLK_ENABLE();

    /*Configure GPIO pin Output Level */
    HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET);

    /*Configure GPIO pin : PC13 */
    GPIO_InitStruct.Pin = GPIO_PIN_13;
    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
}

需要注意的是，这只是一个简单的示例代码，无法保证完全正确和可靠，需要根据具体需求进行调整和修改。同时，还需要根据具体的硬件连接情况进行相应的配置。