#include "hx_serial.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define BUFFER_SIZE 1024
#define OUTPUT_FILE "serial_data.txt"

int main() {
    by_serial_t serial_port;
    char buffer[BUFFER_SIZE];
    int bytes_read;
    int total_bytes_read = 0;
    FILE *output_file;

    // 初始化串口
    if (by_serial_init(&serial_port, "/dev/ttyUSB1") != 0) {
        fprintf(stderr, "Failed to initialize serial port\n");
        return -1;
    }

    by_serial_set_baudrate(&serial_port, 115200);
    by_serial_set_parity(&serial_port, 8, 1, 'N');

    // 打开输出文件
    output_file = fopen(OUTPUT_FILE, "wb");
    if (output_file == NULL) {
        fprintf(stderr, "Failed to open output file\n");
        close(serial_port.fd);
        return -1;
    }

    printf("Reading from serial port. Press ENTER to stop...\n");

    // 循环读取串口数据
    while (1) {
        // // 检查用户输入
        // if (fgetc(stdin) == '\n') {
        //     break;
        // }

        // 检查缓冲区中是否有数据
        int used_len = by_serial_get_used_buffer_len(&serial_port);
        if (used_len <= 0) {
            usleep(100000); // 等待 100ms
            // printf("no data\n");
            continue;
        }else{
            printf("used_len = %d; ", used_len);
        }

        // 读取数据
        bytes_read = by_serial_read(&serial_port, buffer, BUFFER_SIZE);
        if (bytes_read < 0) {
            fprintf(stderr, "Error reading from serial port\n");
            break;
        }

        total_bytes_read += bytes_read;
        printf("Total bytes read: %d\n", total_bytes_read);

        // 将数据以 ASCII 格式写入文件
        // fwrite(buffer, 1, bytes_read, output_file);
        for (int i = 0; i < bytes_read; i++) {
            fprintf(output_file, "%02X ", (unsigned char)buffer[i]);
        }
        fprintf(stderr, "Wrote %d bytes to file\n", bytes_read);
    }

    // 关闭文件和串口
    fclose(output_file);
    close(serial_port.fd);

    printf("Data capture stopped. Data saved to %s\n", OUTPUT_FILE);
    return 0;
}