Image sensing device
An image sensing device includes an image sensing unit, an interface unit, a control endpoint, an isochronous endpoint, a bulk endpoint, an interrupt endpoint, and an interface unit controller. The image sensing unit senses a moving image and a still image. The interface unit is connected to an external device. The control endpoint receives from the external device a command requesting transfer of the still image. The isochronous endpoint transfers the moving image sensed by the image sensing unit to the external device. The bulk endpoint transfers the still image sensed by the image sensing unit to the external device. The interrupt endpoint transfers error information. The error information includes information indicating that an error has occurred during sensing of the still image. The interface unit controller transfers the error information to the external device through the interrupt endpoint in response to the occurrence of the error.
1. An image sensing device comprising:
an image sensing unit that senses a moving image and a still image;
an interface unit that is connected to an external device;
a control endpoint that receives from the external device a command requesting transfer of the still image;
an isochronous endpoint that transfers the moving image sensed by the image sensing unit to the external device;
a bulk endpoint that transfers the still image sensed by the image sensing unit to the external device;
an interrupt endpoint that transfers first error information and second error information to the external device, the first error information including information indicating that a first error has occurred during sensing of the still image, and the second error information including information indicating a second error has occurred during transfer of the still image and information indicating a status of the image sensing device when the second error has occurred; and
an interface unit controller that transfers the first error information to the external device through the interrupt endpoint if the first error has occurred during sensing of the still image, and transfers the second error information to the external device through the interrupt endpoint if the second error has occurred during the transfer of the still image.
2. The image sensing device according to claim 1 , wherein the interface unit complies with the USB (Universal Serial Bus) standard.
3. The image sensing device according to claim 1 , wherein the image sensing device is a digital video camera.
4. A method of controlling an image sensing device, the image sensing device including (a) an image sensing unit that senses a moving image and a still image and (b) an interface unit that is connected to an external device, the method comprising the steps of:
receiving, from the external device via a control endpoint, a command requesting transfer of the still image;
transferring the moving image sensed by the image sensing unit to the external device via an isochronous endpoint;
transferring the still image sensed by the image sensing unit to the external device via a bulk endpoint; and
transferring first error information and second error information to the external device via an interrupt endpoint, the first error information including information indicating that a first error has occurred during sensing of the still image, and the second error information including information indicating a second error has occurred during transfer of the still image and information indicating a status of the image sensing device when the second error has occurred,
wherein the first error information is transferred to the external device through the interrupt endpoint if the first error has occurred during the sensing of the still image, and
wherein the second error information is transferred to the external device through the interrupt endpoint if the second error has occurred during the transfer of the still image.
5. The method according to claim 4 , wherein the interface unit complies with the USB (Universal Serial Bus) standard.
6. The method according to claim 4 , wherein the image sensing device is a digital video camera.