STM32 正则提取字符串中的电话号码

在STM32中，可以使用正则表达式来提取字符串中的电话号码。以下是一个示例代码：

#include <stdio.h>
#include <string.h>
#include "stm32f4xx_hal.h"
#include "stm32f4xx_hal_def.h"
#include "stm32f4xx_hal_uart.h"
#include "stm32f4xx_hal_gpio.h"
#include "stm32f4xx_hal_cortex.h"
#include "stm32f4xx_hal_rcc.h"
#include "stm32f4xx_hal_dma.h"
#include "stm32f4xx_hal_adc.h"
#include "stm32f4xx_hal_adc_ex.h"
#include "stm32f4xx_hal_tim.h"
#include "regex.h"

char *phone_number_regex = "\\d{3}-\\d{3}-\\d{4}";

int main(void)
{
    // 初始化串口
    UART_HandleTypeDef huart1;
    huart1.Instance = USART1;
    huart1.Init.BaudRate = 115200;
    huart1.Init.WordLength = UART_WORDLENGTH_8B;
    huart1.Init.StopBits = UART_STOPBITS_1;
    huart1.Init.Parity = UART_PARITY_NONE;
    huart1.Init.Mode = UART_MODE_TX_RX;
    huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    huart1.Init.OverSampling = UART_OVERSAMPLING_16;
    HAL_UART_Init(&huart1);

    // 初始化正则表达式
    regex_t regex;
    int ret = regcomp(&regex, phone_number_regex, REG_EXTENDED);
    if (ret != 0) {
        printf("Failed to compile regex\n");
        return -1;
    }

    // 读取串口数据
    char buffer[100];
    while (1) {
        if (HAL_UART_Receive(&huart1, (uint8_t *)buffer, 100, 1000) == HAL_OK) {
            buffer[strlen(buffer) - 1] = '\0'; // 去除换行符
            regmatch_t match[1];
            ret = regexec(&regex, buffer, 1, match, 0);
            if (ret == 0) {
                char phone_number[12];
                strncpy(phone_number, buffer + match[0].rm_so, match[0].rm_eo - match[0].rm_so);
                phone_number[match[0].rm_eo - match[0].rm_so] = '\0';
                printf("Phone number: %s\n", phone_number);
            } else {
                printf("No phone number found\n");
            }
        }
    }

    return 0;
}

在上面的示例代码中，我们首先通过正则表达式编译函数 `regcomp` 初始化正则表达式。然后在读取串口数据时，使用 `regexec` 函数和正则表达式匹配字符串，如果匹配成功，则提取电话号码并打印出来。否则，打印出未找到电话号码的提示信息。