Hartley 开发

偶然间把一个usbbulk 的实验在java 里实现了，刚才又在VC 下用libusb 做了一个，虽然很简单，但也是遇到一个问题，在这里记下，为了备忘，也为了让同路人少走弯路。
     首先 把usb.h ，libusb0.dll ，libusb.lib 放到工程目录里，然后就是要在project setting 里添加libusb.lib 如下图：

 

然后就是写代码了,开始的时候不知道流程，总提示 could not claim interface 0 , 却不知道怎么办，偶尔在http://lists.alioth.debian.org/pipermail/sane-devel/2003-February/006638.html

看到usb_set_configuration(hdev, 1);

于是有了下面测试成功的程序：

       // usb_paul.cpp : Defines the entry point for the console application.

//paul phenix s-yaojing@163.com

 

#include "stdafx.h"

#include "usb.h"

 

#define  USB_VID 0x547

#define  USB_PID 0x1002

 

int main(int argc, char* argv[])

{

       struct usb_bus *bus;

       struct usb_device *dev;

       usb_dev_handle  *hdev;

       char writedata[] = {1,2,3,4,5};

       char readdata[sizeof(writedata)];  

 

       printf("Hello World!\n");

 

       usb_init();

       usb_set_debug(3);

      

       usb_find_busses();

       usb_find_devices();

 

       for (bus = usb_get_busses(); bus;bus->next)

       {

              for (dev = bus->devices; dev; dev->next)

              {

                     hdev = usb_open(dev);

 

                     if (hdev)

                     {                         

                            int VID = dev->descriptor.idVendor;

                            int PID = dev->descriptor.idProduct;

                           

                    

                            if ((VID == USB_VID)&(PID == USB_PID))

                            {

                                   printf("The PID is 0x%4x \n",PID);

                                   printf("The VID is 0x%4x \n",VID);

                                   usb_set_configuration(hdev, 1);

                                   usb_claim_interface(hdev,0);

                                   usb_bulk_write(hdev,0x04,writedata,sizeof(writedata),2000);

 

                                   usb_bulk_read(hdev,0x88,readdata,sizeof(readdata),2000);

 

                            }

                            printf("Readdata is :\n");

                            for (int i =0 ;i<sizeof(readdata);i++)

                            {

                                   printf("Readdata is %d ",readdata[i]);

                            }                  

                     }

                     usb_close(hdev);

                     break;

              }

              break;

       }

 

 

       return 0;

}

 

其实功能很简单，就是在一个端点写入一组数据，然后在另外的一个端点读出，然后打印出来。在68013上跑的程序是bulkloop。