标签：for contain overflow return elements doc html sid org
摘自：http://libusb.sourceforge.net/api-1.0/group__libusb__dev.html#gaf2718609d50c8ded2704e4051b3d2925
| uint8_t libusb_get_bus_number | ( | libusb_device * | dev | ) |
Get the number of the bus that a device is connected to.
| dev | a device |
| uint8_t libusb_get_port_number | ( | libusb_device * | dev | ) |
Get the number of the port that a device is connected to. Unless the OS does something funky, or you are hot-plugging USB extension cards, the port number returned by this call is usually guaranteed to be uniquely tied to a physical port, meaning that different devices plugged on the same physical port should return the same port number.
But outside of this, there is no guarantee that the port number returned by this call will remain the same, or even match the order in which ports have been numbered by the HUB/HCD manufacturer.
| dev | a device |
| int libusb_get_port_numbers | ( | libusb_device * | dev, |
| uint8_t * | port_numbers, | ||
| int | port_numbers_len | ||
| ) |
Get the list of all port numbers from root for the specified device
Since version 1.0.16, LIBUSB_API_VERSION >= 0x01000102
| dev | a device |
| port_numbers | the array that should contain the port numbers |
| port_numbers_len | the maximum length of the array. As per the USB 3.0 specs, the current maximum limit for the depth is 7. |
| int libusb_get_port_path | ( | libusb_context * | ctx, |
| libusb_device * | dev, | ||
| uint8_t * | port_numbers, | ||
| uint8_t | port_numbers_len | ||
| ) |
Deprecated please use libusb_get_port_numbers instead.
标签：for contain overflow return elements doc html sid org
原文地址：https://www.cnblogs.com/LiuYanYGZ/p/12342579.html
