| 摘要 |
<p>PURPOSE:To obtain a camera having a control system where various external inputs and set inputs are linked to one another in a high degree, by operating efficiently the interruption processing of a microprocessor. CONSTITUTION:For the purpose of operating efficiently the interruption processing in camera control, information, which are obtained by subjecting camera information to A/D conversion in an A/D converter 32 which converts the external analog input to a digital input, and input information due to various switches are taken into a storage means (RAM) temporarily and are taken out from this RAM map and are used for operations and control. Information having a higher priority level such as a release signal, a photometry start signal, and a photometric quantity leading-in signal among various camera information are inputted to a microprocessor 30 by interruption operations having a period shorter than that for information having a lower priority level. That is, the interruption processing of the microprocessor 30 is used for the camera control to input (read) various camera information at intervals of a prescribed constant time independently of the advance state of the main program of the microprocessor 30, and thus, the microprocessor is operated efficiently, and various information are read in surely.</p> |
