err:LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLE err:LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLE err:LIBUSB_SUCCESS / LIBUSB_TRANSFER_COMPLE 重要的事情说4遍 错误原因 LIBUSB_SUCCESS
USB_SET_TIMEOUT, &transfer->timeout)) <0)return_errno_to_libusb(errno);if(IS_XFERIN(transfer)) {if((transfer->flags & LIBUSB_TRANSFER_SHORT_NOT_OK) ==0)if((ioctl(fd, USB_SET_SHORT_XFER, &nr)) <0)return_errno_to_lib
}if(!pp_dev->transfer) {fprintf(stderr,"Failed to allocate libusb transfer\n");if(pp_dev->read_state != READ_STATE_FAILED_START) portpilot_set_read_start_failed(pp_dev);return; } libusb_fill_interrupt_transfer(pp_dev->transfer, pp_dev->handle, pp_dev->input_endpoint, (unsignedcha...
*本函数的内部实现就是调用:libusb_handle_events_timeout_completed(ctx,&tv,NULL); *超时时间设置为60秒 * *这个函数只是为了保持向后兼容,新的代码建议使用libusb_handle_events_completed()或 *libusb_handle_events_timeout_completed(), *这2个新函数可以处理竞争。 * *参数: *ctx-context(如果传入NULL...
int API_EXPORTED libusb_submit_transfer(struct libusb_transfer *transfer); 2.9.8 处理事件 有4 个函数,其中 2 个没有completed后缀的函数过时了: /** ingroup libusb_poll * 处理任何'pengding的事件' * * 使用异步传输函数时,提交的tranfer结构体后就返回了。 * 可以使用本函数处理这些传输的返回结果...
Hi, I am using the code snippet listed below to do an ISO write to my USB device, the problem I got was wired: the code either just freezed at that libusb_submit_transfer line and didn't print out any info on the return value or crashed ...
*) And not return NOT_FOUND from libusb_cancel_transfer in this case, I vote for returning success, but we could return an other error instead if we want to signal the fact that the transfer has already completed to the caller of libusb_cancel_transfer....
The documentation for libusb_interrupt_transfer() states the following: For interrupt reads, the length field indicates the maximum length of data you are expecting to receive. If less data arrives than expected, this function will retur...
void callbackUSBTransferComplete(struct libusb_transfer *xfr) { switch(xfr->status) { case LIBUSB_TRANSFER_COMPLETED: // Success here, data transfered are inside // xfr->buffer // and the length is // xfr->actual_length break;
if(status!=LIBUSB_SUCCESS){libusb_close(hdev);printf("libusb_claim_interfacefailed:%s\n",libusb_error_name(status));gotoerr2;}ret=libusb_bulk_transfer(hdev,0x03,buf,num_write,transferred,3000);openocd 是一个开源的 USB JTAG 调试软件,它也是使用 libusb,涉及 USB 的操作代码如下。