2020-11-25

最新推荐文章于 2024-09-20 20:06:32 发布

原创最新推荐文章于 2024-09-20 20:06:32 发布 · 493 阅读

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#windows

HID 同时被 3 个专栏收录

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该博客展示了一段在Windows系统下的代码，用于简单演示HID收发，支持USB复合设备。代码通过唯一路径打开设备，实现数据的发送与接收，还包含设备信息打印等功能，源码可在资源下载中获取。

以下代码简单演示了HID收发，可支持USB复合设备，通过唯一的路径打开设备，实现发送接收。源码可在资源下载中下载。

#include "stdafx.h"
#include "hidapi.h"
#include <stdio.h>
#include <Windows.h>

#define MAX_STR 255
#define READ_TIMEOUT_MS 500
#pragma comment(lib, "hidapi.lib")

void print_dev_info(hid_device_info *info)
{
   printf("path:");printf(info->path);
   printf("\r\nvendor_id:%04X",info->vendor_id);
   printf("\r\nproduct_id:%04X",info->product_id);
   printf("\r\nserial_number:");wprintf(info->serial_number);
   printf("\r\nrelease_number:%04X",info->release_number);
   printf("\r\nmanufacturer_string:");wprintf(info->manufacturer_string);
   printf("\r\nproduct_string:");wprintf(info->product_string);
   printf("\r\nusage_page:%d",info->usage_page);
   printf("\r\nusage:%d",info->usage);
   printf("\r\ninterface_number:%d\r\n",info->interface_number);
   if (info->next != NULL)
   {
       print_dev_info(info->next);
   }
}

int _tmain(int argc, _TCHAR* argv[])
{
   int res;
   unsigned char buf[65];
   wchar_t wstr[MAX_STR];
   hid_device *handle;
   int i;

// Initialize the hidapi library
res = hid_init();

   hid_device_info *p_device_info = hid_enumerate(0x2047, 0x0301);
   if (p_device_info == NULL)
   {
       printf("get hid device info error!\r\n");
   }
   print_dev_info(p_device_info);

   // Open the device using the VID, PID,
   // and optionally the Serial number.
   char* path = NULL;
   if (p_device_info->usage == 1)// select path by usage
   {
       path = p_device_info->path;
   }
   else if (p_device_info->next != NULL && p_device_info->next->usage == 1)
   {
       path = p_device_info->next->path;
   }
   if (path == NULL)
   {
       printf("no valid path!\r\n");
       goto END_MAIN;
   }
   //handle = hid_open(0x2047, 0x0301, NULL);
   handle = hid_open_path(path);
   if (handle == NULL)
   {
       printf("hid device open error!\r\n");
       goto END_MAIN;
}
   buf[0] = 0x00;//endpoint
   buf[1] = 0xa5;
   buf[2] = 0x5a;
   buf[3] = 0x00;
   buf[4] = 0x09;
   buf[5] = 0xc9;
   buf[6] = 0x01;
   buf[7] = 0xc1;
   buf[8] = 0x0d;
   buf[9] = 0x0a;
   res = hid_write(handle, buf, 65);
   printf("");
   // Read requested state
   res = hid_read_timeout(handle, buf, 65, READ_TIMEOUT_MS);
   printf("hid read size:%d\r\n",res);
   // Print out the returned buffer.
   for (i = 0; i < res; i++)
   {
       if (i > 0 && i%16 == 0)
       {
           printf("\r\n");
       }
       printf("%02X ", buf[i]);

   }
   printf("\r\n");
   // Close the device
   hid_close(handle);
   // Finalize the hidapi library
   res = hid_exit();
END_MAIN:
   hid_free_enumeration(p_device_info);
   system("pause");
   return 0;
}