QT 上下调用 libusb 库 stm32407

int OpenUSB(void) { int ret; // 初始化 libusb ret = libusb_init(&m_dev_ctx); if (ret < 0) { std::cerr << "Failed to initialize libusb" << std::endl; return ret; } // 打开 USB 设备，替换为你的设备 VID 和 PID m_dev_handle = libusb_open_device_with_vid_pid(m_dev_ctx, m_dev_VENDOR, m_dev_PRODUCT); if (!m_dev_handle) { std::cerr << "Cannot open device" << std::endl; libusb_exit(m_dev_ctx); return -1; } // 申请接口（假设接口 0） ret = libusb_claim_interface(m_dev_handle, 1); if (ret < 0) { std::cerr << "Cannot claim interface" << std::endl; libusb_close(m_dev_handle); libusb_exit(m_dev_ctx); return ret; } return ret=0; } int ReadUsbMsg(void) { int ret; libusb_device *newdevice=libusb_get_device(m_dev_handle); libusb_device_descriptor desc; // 获取设备描述符 if (libusb_get_device_descriptor(newdevice, &desc) != 0) { std::cerr << "Failed to get device descriptor" << std::endl; return -1; }else { // 获取厂家字符串 if (libusb_get_string_descriptor_ascii(m_dev_handle, desc.iManufacturer, usb_msg_manufacturer, sizeof(usb_msg_manufacturer)) > 0) { std::cout << "Manufacturer: " << usb_msg_manufacturer << std::endl; } // 获取产品字符串 if (libusb_get_string_descriptor_ascii(m_dev_handle, desc.iProduct, usb_msg_product, sizeof(usb_msg_product)) > 0) { std::cout << "Product: " << usb_msg_product << std::endl; } // 获取序列号字符串 if (libusb_get_string_descriptor_ascii(m_dev_handle, desc.iSerialNumber, usb_msg_serial, sizeof(usb_msg_serial)) > 0) { std::cout << "Serial Number: " << usb_msg_serial << std::endl; } } return ret=1; } int WriteBulkData() { int transferred; // 实际传输字节数 int ret; // 发送数据 ret = libusb_bulk_transfer(m_dev_handle, 2, Send_CmdData, sizeof(Send_CmdData), &transferred, 1000); if (ret < 0) { std::cerr <<libusb_error_name(ret)<< std::endl; return ret; } else { std::cout<<"Sent CMD: 0X"<<std::setw(2) << std::setfill('0') << std::hex <<(int)Send_CmdData[0]<<"("<<transferred<<"bytes)\n"<<std::endl; } return 0; } void display_read_data(unsigned char *buffer, int transferred) { std::cout << "Read " << transferred << " bytes:" << std::endl; for (int i = 0; i < transferred; i++) { if (i % 50 == 0) { // 每16个字节换行 if (i > 0) { std::cout << std::dec << std::endl; // 切换回十进制 } std::cout << "Line " << (i / 50) << ": "; } std::cout << std::setw(2) << std::setfill('0') << std::hex << (int)buffer[i] << " "; } std::cout << std::dec << std::endl; // 切换回十进制 } int ReadBulkData() { //unsigned char buffer[2048]; // 缓冲区大小根据需求调整 int transferred; // 实际传输字节数 int ret; // 执行 bulk 读取 RecTraData ret = libusb_bulk_transfer(m_dev_handle, 0x82, Rece_DATA, sizeof(Rece_DATA), &transferred, 1000); //ret = libusb_bulk_transfer(m_dev_handle, 0x82, buffer, sizeof(buffer), &transferred, 1000); if(ret<0) { std::cerr << "Bulk read failed: " << libusb_error_name(ret) << std::endl; return ret; } else { display_read_data(Rece_DATA,transferred); } return transferred; }