Data transfer control system
View Patent ↗A data transfer control system includes a PC and a camera, and these are connected by a USB cable in a manner capable of making a communication with each other. Prior to a data transfer, the PC instructs the camera that it is impossible to cut-off, that is, to prohibit a connected state (connection state) from being released. In receipt thereof, the camera turns-on a cut-off-impossible lamp. Upon completion of the data transfer and a transfer of FAT data, the PC instructs the camera that it is allowed to cut-off, that is, to allow to release the connection state. In receipt thereof, the camera turns-off the cut-off-impossible lamp.
1. A data transfer control system provided with a recording apparatus, and a transfer control apparatus connected to said recording apparatus in a manner capable of making a communication there between and transferring to said recording apparatus data and managing information of said data,
said transfer control apparatus comprising:
a prohibiting signal transmitter for transmitting, prior to a transfer of said data, to said recording apparatus a prohibiting signal to prohibit a connection state from being released;
an allowing signal transmitter for transmitting to said recording apparatus an allowing signal to allow to release said connection state when the transfer of said data is completed, and a transfer of said managing information is also completed;
a timer for starting a count of a predetermined time period at a time that the transfer of said data is ended;
an updater for updating said managing information, determining that the transfer of said data is completed when said timer counts said predetermined time period; and
a writing instructor for instructing said recording apparatus to write the managing information updated by said updater, and
said recording apparatus comprising:
a cutting-off-impossible notifier for notifying of being impossible to cut-off in response to a reception of said prohibiting signal; and
a cutting-off-allowing notifier for notifying of being allowed to cut-off in response to a reception of said allowing signal.
2. A data transfer control system according to claim 1 , wherein
said transfer control apparatus further comprising a command transmitter for transmitting to said recording apparatus a control command including at least said allowing signal or said prohibiting signal, and
said recording apparatus further comprises a command receiver for receiving said control command, and a command determiner for determining a content shown by the control command received by said command receiver.
3. A data transfer control system according to claim 1 , wherein
said transfer control apparatus and said recording apparatus are wire-connected or wireless-connected,
said cutting-off-impossible notifier notifies of being impossible to detach a cable or a card-type expansion device attached to at least one of said transfer control apparatus and said recording apparatus in response to a reception of said prohibiting signal.
4. A data transfer control method executed between a recording apparatus, and a transfer control apparatus, which is connected to the recording apparatus in a manner capable of making a communication therebetween, and transferring to said recording apparatus data and managing information of said data, wherein
said transfer control apparatus executes following steps of:
(a1) transmitting to said recording apparatus a prohibiting signal to prohibit a connection state from being released prior to a transfer of the data,
(b1) transmitting to said recording apparatus an allowing signal to allow to release said connection state when the transfer of the data is completed and a transfer of said managing information is also completed,
(c1) starting a count of a predetermined time period at a time that the transfer of said data is ended,
(d1) updating said managing information,
(e1) determining that the transfer of said data is completed when said predetermined time period is counted, and
(f1) instructing said recording apparatus to write the updated managing information,
said recording apparatus executes following steps of:
(a2) notifying of being impossible to cut-off said connection state in response to said prohibiting signal, and
(b2) notifying of being allowed to cut-off said connection state in response to said allowing signal.
5. A data transfer control method according to claim 4 , wherein
said transfer control apparatus and said recording apparatus are wire-connected or wireless-connected,
said step (a2) notifies of being impossible to detach a cable or a card-type expansion device attached to at least to one of said transfer control apparatus and said recording apparatus.