struct libusb_transfer *libusb_alloc_transfer(int iso_packets); ``` -参数: - `iso_packets`:用于传递给`libusb_alloc_transfer`函数的参数,指定要为transfer分配多少个传输分组(iso packets)。对于非等时异步传输,这个参数应该为0。对于等时传输(isochronous transfers),这个参数应该是你想要的iso分组的数量...
inf->itransfer =libusb_alloc_transfer(0);if(!inf->itransfer)gotoerr_free_cbuf; inf->ctransfer =libusb_alloc_transfer(0);if(!inf->ctransfer)gotoerr_free_int; slog(1, SLOG_INFO,"usb: Now looking for a matching device"); ncusb_watch_for_device(inf->ctx, &inf->dev_descr);return...
xfr[index] = LibUsb.allocTransfer(0);// Java GC takes care of memory freeingByteBuffer transfer_buffer = ByteBuffer.allocateDirect(TRANSFER_SIZE); LibUsb.fillBulkTransfer(xfr[index], handle, bulk_endpoint, transfer_buffer, transfer_completed_callback, user_data,0); res |= LibUsb.submitTransfer...
传输完毕,需要释放 libusb_transfer 结构体,如果要重复利用这个结构体则无需释放。 /**ingrouplibusb_asyncio *释放libusb_transfer结构体 *前面使用libusb_alloc_transfer()分配的结构体,要使用本函数来释放。 * *如果libusb_transfer::flags的LIBUSB_TRANSFER_FREE_BUFFER位非0, *那么会使用free()函数释放ibus...
struct libusb_transfer * libusb_alloc_transfer (int iso_packets) 使用指定数量的同步数据包描述符分配 libusb 传输。 void libusb_free_transfer (struct libusb_transfer *transfer) 释放libusb传输。 int libusb_submit_transfer (struct libusb_transfer *transfer) ...
libusb_transfer* transfer =libusb_alloc_transfer(0);unsignedchar*buf =newunsignedchar[64];memset(buf,0,64); transfer->actual_length =0;libusb_fill_bulk_transfer(transfer,dHand,0x82,buf,64,&callbackRevc,this,0); rc =libusb_submit_transfer(transfer);if(rc <0) ...
{//创建异步传输结构libusb_transfer* transfer =libusb_alloc_transfer(0);//开辟接受内存地址unsignedchar*buf =newunsignedchar[64];//清空内存memset(buf,0,64); transfer->actual_length =0;//填充传输结构//transfer 传输结构//dHand 设备句柄//0x82 设备端点,这里是我使用的读数据端点//buf 数据接受存...
xfer=libusb_alloc_transfer(number0fPacketPerFrame);if(!xfer) { printf("ERROR: no memory for transfer\n"); libusb_set_debug(NULL,0);return-1; } libusb_fill_iso_transfer(xfer, g_handler, endpoint_num, buff, transfer_length, number0fPacketPerFrame, ...
libusb_transfer*transfer=libusb_alloc_transfer(0); if(transfer==NULL){ printf("无法分配异步传输结构体\n"); libusb_close(dev_handle); libusb_exit(NULL); return1; } // 设置传输的参数 unsignedcharbuffer[64]; libusb_fill_bulk_transfer(transfer,dev_handle,0x81,buffer,sizeof(buffer),transfer...
libusb_transfer* transfer =libusb_alloc_transfer(0);unsignedchar*buf =newunsignedchar[64];memset(buf,0,64); transfer->actual_length =0;libusb_fill_bulk_transfer(transfer,dHand,0x82,buf,64,&callbackRevc,this,0); rc =libusb_submit_transfer(transfer);if(rc <0) ...