Power supplying apparatus that supplies power to external apparatus based on power flow information and the role of the power supplying apparatus and a method of controlling the same
A power supplying apparatus stores power flow direction information related to a power role of the power supplying apparatus relative to an external apparatus in a storage, and performs control, in a case where the external apparatus has been connected to a connecter of the power supplying apparatus, to match a power role of the power supplying apparatus and a power role corresponding to the power flow direction information stored in the storage based on the power flow direction information stored in the storage unit.
1. A power supplying apparatus comprising:
a connector;
a CPU; and
a memory having stored therein a program for causing the power supplying apparatus to function as the following units in a case where the program has been executed by the CPU:
a storage unit that stores power flow direction information related to a power role of the power supplying apparatus relative to an external apparatus;
a determination unit that determines, in a case where an external apparatus has been connected to the connector, a power role of the power supplying apparatus relative to the external apparatus connected to the connector;
a reading unit that reads out the power flow information from the storage unit in a case where the external apparatus has been connected to the connector; and
a control unit that performs control to determine, in a case where the external apparatus has been connected to the connector, whether the power role of the power supplying apparatus determined by the determination unit matches the power role of the power supplying apparatus indicated by the power flow direction information read out from the storage unit based on the power flow direction information read out from the storage unit or not and change the power role of the power supplying apparatus so that the power role of the power supplying apparatus matches the power role of the power supplying apparatus indicated by the power flow direction information if it is determined that the power role of the power supplying apparatus determined by the determination unit does not match the power role of the power supplying apparatus indicated by the power flow direction information.
2. The power supplying apparatus according to claim 1 , wherein
the power supplying apparatus supplies power and receives power in conformity with a USB Power Delivery standard, and
in a case where the power role of the power supplying apparatus is a source of the USB PD standard, the control unit performs control to supply power to the external apparatus connected to the connector, whereas in a case where the power role of the power supplying apparatus is a sink of the USB PD standard, the control unit performs control to receive power from the external apparatus connected to the connector.
3. The power supplying apparatus according to claim 1 , wherein
the power flow direction information includes identification information of the external apparatus and power role information indicating the power role of the power supplying apparatus relative to the external apparatus, and
the control unit determines whether the power role of the power supplying apparatus determined by the determination unit matches the power role indicated by the power role information which is included in the power flow direction information and which corresponds to the identification information of the connected external apparatus or not.
4. The power supplying apparatus according to claim 1 , wherein the power supplying apparatus supplies power and receives power in conformity with a USB Power Delivery standard, and
wherein the control unit determines that the power role of the power supplying apparatus determined by the determination unit does not match the power role indicated by the power flow direction information if the power role of the power supplying apparatus determined by the determination unit is a source of the USB PD standard and the power role of the power supplying apparatus indicated by the power flow information is a sink of the USB PD standard.
5. The power supplying apparatus according to claim 1 , wherein the control unit stores power flow direction information indicating the power role of the power supplying apparatus determined by the determination unit in a case where the power flow direction information related to the power supplying apparatus relating to the connected external apparatus does not stored in the storage unit.
6. The power supplying apparatus according to claim 3 , wherein the program, when executed by the CPU, further causes the power supplying apparatus to function as:
a communication unit that communicates with the connected external apparatus, and
using the identification information of the connected external apparatus that has been obtained from the connected external apparatus via communication performed by the communication unit, the control unit specifies the power role indicated by the power role information which is included in the power flow direction information and which corresponds to the identification information of the connected external apparatus.
7. The power supplying apparatus according to claim 4 , wherein the control unit performs the control to change the power role of the power supplying apparatus to the sink of the USB PD standard if the power role of the power supplying apparatus determined by the determination unit is the source of the USB PD standard and the power role of the power supplying apparatus indicated by the power flow information is the sink of the USB PD standard.
8. The power supplying apparatus according to claim 6 , wherein
the determination unit determines the power role of the power supplying apparatus upon establishment of connection of the external apparatus to the connector, and
the control unit specifies a power role relative to the connected external apparatus with use of the identification information of the connected external apparatus that has been obtained from the connected external apparatus via communication performed by the communication unit after the power role has been determined by the determination unit, and
in a case where the power role of the power supplying apparatus determined by the determination unit differs from the power role that has been specified based on the power flow direction information, the control unit controls the communication unit so that predetermined communication for causing the power role of the power supplying apparatus to match the specified power role is automatically performed.
9. The power supplying apparatus according to claim 8 , wherein
the power supplying apparatus supplies power and receives power in conformity with a USB Power Delivery standard, and
the predetermined communication is communication for requesting the connected external apparatus to switch a power role in accordance with the USB PD standard.
10. The power supplying apparatus according to claim 8 , wherein
in a case where the predetermined communication for causing the power role of the power supplying apparatus to match the specified power role has been performed, the control unit performs control to display, on a display unit, the power role specified based on the power flow direction information, and
in a case where the power role information corresponding to the identification information of the connected external apparatus is not stored in the storage unit, the control unit performs control to display the determined power role on the display unit.
11. A method of controlling a power supplying apparatus which comprises a connector and a storage device that stores power flow direction information related to a power role of the power supplying apparatus relative to an external apparatus, the method comprising:
determining, in a case where an external apparatus has been connected to the connector, a power role of the power supplying apparatus relative to the external apparatus connected to the connector;
reading out the power flow information from the storage device in a case where the external apparatus has been connected to the connector;
performing control to determine, in a case where the external apparatus has been connected to the connector, whether the power role of the power supplying apparatus determined in the determining matches the power role of the power supplying apparatus indicated by the power flow direction information read out from the storage device based on the power flow direction information read out from the storage device or not; and
performing control to change the power role of the power supplying apparatus so that the power role of the power supplying apparatus matches the power role indicated by the power flow direction information if it is determined that the power role of the power supplying apparatus determined in the determining does not match the power role of the power supplying apparatus indicated by the power flow direction information.
12. The method according to claim 11 , wherein
the power supplying apparatus supplies power and receives power in conformity with a USB Power Delivery standard, and further comprising:
performing control to supply power to the external apparatus connected to the connector in a case where the power role of the power supplying apparatus is a source of the USB PD standard; and
performing control to receive power from the external apparatus connected to the connector in a case where the power role of the power supplying apparatus is a sink of the USB PD standard.
13. The method according to claim 11 , wherein
the power flow direction information includes identification information of the external apparatus and power role information indicating the power role of the power supplying apparatus relative to the external apparatus, and
the performing the control to change causes the power role of the power supplying apparatus to match the power role indicated by the power role information which is included in the power flow direction information and which corresponds to the identification information of the connected external apparatus.
14. The method according to claim 11 , wherein the power supplying apparatus supplies power and receives power in conformity with a USB Power Delivery standard, and
wherein in the performing to determine, it is determined that the power role of the power supplying apparatus determined in the determining does not match the power role indicated by the power flow direction information if the power role of the power supplying apparatus determined in the determining is a source of the USB PD standard and the power role of the power supplying apparatus indicated by the power flow information is a sink of the USB PD standard.
15. The method according to claim 11 , further comprising:
storing power flow direction information indicating the power role of the power supplying apparatus determined in the determining in the storage device in a case where the power flow direction information related to the power supplying apparatus relating to the connected external apparatus does not stored in the storage device.
16. The method according to claim 13 , further comprising
communicating with the connected external apparatus,
wherein the performing of the control to determine specifies, with use of the identification information of the connected external apparatus that has been obtained from the connected external apparatus in the communicating, the power role indicated by the power role information which is included in the power flow direction information and which corresponds to the identification information of the connected external apparatus.
17. The method according to claim 14 , wherein in the performing the control to change, the power role of the power supplying apparatus is changed to the sink of the USB PD standard if the power role of the power supplying apparatus determined in the determining is the source of the USB PD standard and the power role of the power supplying apparatus indicated by the power flow information is the sink of the USB PD standard.
18. The method according to claim 16 , wherein
the determining determines the power role of the power supplying apparatus upon establishment of connection of the external apparatus to the connector, and
the performing the control to determine specifies a power role relative to the connected external apparatus with use of the identification information of the connected external apparatus that has been obtained from the connected external apparatus via the communication after the power role has been determined in the determining, and
the performing the control to change controls, in a case where the power role of the power supplying apparatus determined in the determining differs from the power role that has been specified based on the power flow direction information, the communication so that predetermined communication for causing the power role of the power supplying apparatus to match the power role relative to the connected external apparatus is automatically performed.
19. The method according to claim 18 , wherein
the power supplying apparatus supplies power and receives power in conformity with a USB Power Delivery standard, and
the predetermined communication is communication for requesting the connected external apparatus to switch a power role in accordance with the USB PD standard.
20. The method according to claim 18 , further comprising:
displaying, on a display unit, the power role specified based on the power flow direction information in a case where the predetermined communication for causing the power role of the power supplying apparatus to match the specified power role has been performed, and
displaying the determined power role on the display unit in a case where the power role information corresponding to the identification information of the connected external apparatus is not stored in the storage device.