Canon Kabushiki Kaisha

Hiroko Tsujiguchi

Hiroshi Uemura

Hideki Nakanishi

A control apparatus connected to a device includes a first control unit configured to execute a program, a second control unit configured to access the device to control the device, and a third control unit configured to control a reset of the control apparatus by transmitting a watchdog reset signal to the first and the second control units. When a condition for triggering a watchdog reset is satisfied, the third control unit transmits a watchdog reset prior notification to the second control unit before transmitting the watchdog reset signal. Upon reception of the watchdog reset signal, the first control unit executes a watchdog reset on the control apparatus. When a watchdog reset is executed, the second control unit controls the device to perform processing for making the device ready to accept a command based on information acquired upon reception of the watchdog reset prior notification.

Control apparatus and control method for processor initialization

A printing apparatus which prints by scanning a printhead in two directions based on raster data containing multi-valued data, sequentially stores multi-valued data contained in each raster data in a print buffer in correspondence with a predetermined direction of the two directions, acquires for each raster data, identification information corresponding to the multi-valued data stored in the print buffer first and identification information corresponding to the multi-valued data stored in the print buffer lastly for each tone value based on initial values of identification information and the number of multi-valued data contained in each raster data, generates bitmap data from the multi-valued data using pattern data read out based on identification information selected based on a scanning direction of the printhead, and controls printing of the printhead based on the generated bitmap data.

Growing community of inventors

Kawasaki, Japan

Hiroko Tsujiguchi