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| en:exercises:timer [2010/03/08 22:01] – Helen | en:exercises:timer [2020/07/20 09:00] (current) – external edit 127.0.0.1 | ||
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| - Display on LCD screen, with the accuracy of 100 ms, time between pressing of any random two buttons. Execution of the time measurement is your own choice | - Display on LCD screen, with the accuracy of 100 ms, time between pressing of any random two buttons. Execution of the time measurement is your own choice | ||
| - | - Pressing button S1, the blinking speed of all three LED-s is slowed down two times. | + | - Pressing button S1, the blinking speed of all three LEDs is slowed down two times. |
| - Display the frequency of pressing down the button S1 on the 7 segment LED indicator in Hz-s. The display of the frequency must be limited with 0 at the bottom and with 9 at the top. | - Display the frequency of pressing down the button S1 on the 7 segment LED indicator in Hz-s. The display of the frequency must be limited with 0 at the bottom and with 9 at the top. | ||
| - | - If button S1 is pressed, the program counts down the seconds from 60 to 0 and then lights the red LED. If button S2 is pressed the time is 30 seconds, followed by lighting of the yellow LED. For S3 the time is 10 seconds and the LED is green. All the processes have to take place simultaneously. The LED-s switch off when corresponding buttons are pressed. | + | - If button S1 is pressed, the program counts down the seconds from 60 to 0 and then lights the red LED. If button S2 is pressed the time is 30 seconds, followed by lighting of the yellow LED. For S3 the time is 10 seconds and the LED is green. All the processes have to take place simultaneously. The LEDs switch off when corresponding buttons are pressed. |
| - Display the Time on the LCD as follows: hh:mm:ss. Use hardware timer 1 with interruptions and the Time must be configurable with the buttons. It is advised to use three buttons, S1 for increasing rotationally the hours, S2 for minutes and S3 for seconds. | - Display the Time on the LCD as follows: hh:mm:ss. Use hardware timer 1 with interruptions and the Time must be configurable with the buttons. It is advised to use three buttons, S1 for increasing rotationally the hours, S2 for minutes and S3 for seconds. | ||
