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Hi, I am using 56F827 in my project. One of the push button is connected to one GPIO pin. I want to execute two different operations when push button is pressed. Operation to execute will be decided on the duration till which button is pressed like....if button is pressed for 2 seconds then perfom op_1 and else perform op_2. As I know we can configure GPIO pin as GPIO_INTERRUPT_DETECTION_ACTIVE_HIGH or GPIO_INTERRUPT_DETECTION_ACTIVE_LOW [edge triggerd] to generate interrupt. Now I want to measure duration when button is pressed. How can I measure the same? My idea about implementation for the same:- 1> I will have to configure interrupt for GPIO_INTERRUPT_DETECTION_ACTIVE_HIGH. So whenever user press the button then it will go to ISR for GPIO pin. 2> When interrupt occurs then make GPIO_INTERRUPT_DETECTION_ACTIVE_LOW and start timer so that start time is captured. 3> Now when user releses the button then control will go to ISR as new setting i.e. GPIO_INTERRUPT_DETECTION_ACTIVE_LOW and we can stop the timer. Using above mechanism we can mesure the time for which user has pressed button. Correct me if I am wrong. Regards, Nitin |
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GPIO interrupts configuration...
Started by ●October 25, 2002
