libusb的测试程序

#include <errno.h> #include <pthread.h> #include <signal.h> #include <string.h> #include <stdio.h> #include <stdlib.h> #include <libusb.h> int main(){ libusb_device **devs; libusb_device_handle *dev_handle; libusb_context *ctx=NULL; int r; ssize_t cnt; r=libusb_init(&ctx);//初始化bus总线 if(r<0) { printf("Init Error =%d\n",r); return 1; } libusb_set_debug(ctx,3); cnt=libusb_get_device_list(ctx,&devs); //搜索设备列表 if(cnt<0){ printf("Get Device Error\n"); return 1; } printf("%d Devices in list\n",cnt); dev_handle= libusb_open_device_with_vid_pid(ctx,1111,1111);//vid,pid根据设备的 打开 if(dev_handle==NULL) { printf("Cannot open device\n"); } else { printf("Device Opened\n"); } libusb_free_device_list(devs,1); //释放列表 unsigned char *data=new unsigned char[4]; data[0]='a'; data[1]='b'; data[2]='c'; data[3]='d'; int actual;//用于计算多少BYTE写成功； if(libusb_kernel_driver_active(dev_handle,0)==1) { printf("Kernel Driver Active\n"); if(libusb_detach_kernel_driver(dev_handle,0)==0) { printf("Kernel Driver Detached!\n"); } r=libusb_claim_interface(dev_handle,0); if(r<0) { printf("Cannot Claim Interface\n"); return 1; } printf("Claimed Interface\n"); printf("Data->%s<-\n",data); printf("Writing Data...\n"); r=libusb_bulk_transfer(dev_handle,(2|LIBUSB_ENDPOINT_OUT),data,4,&actual,0); if(r==0&&actual==4) { printf("Writing Successful!\n"); } else { printf("Write Error\n"); } r=libusb_release_interface(dev_handle,0); if(r!=0) { printf("Cannot Release Interface\n"); return 1; } printf("Releaseed Interface\n"); libusb_close(dev_handle); libusb_exit(ctx); delete [] data; return 0; } }