Treatment jitter touch of a button switches appear, you know?
Treatment jitter touch of a button switches appear, you know?In many categories switch, touch of a button switches and mechanical keys can be considered many products have more features, it differs between the two, you know what?
1, the touch of a button switch cost is very high, life is not absolute;
2, semi-automated mechanical key is used during the moment generally computer control panel touch switches.
Touch of a button switches dynamic display scanning frequency theoretically not be less than 25Hz, the actual applications tend to go to more than 30Hz will have a better display. When the buttons are not displayed as normal, press the button to display the jitter, because when you do not press the button scanning frequency to meet the display requirements, then press, and a large increase in delay due to procedural reasons such scanning frequency can not be met It requires that a "jitter" phenomenon.
The key problem is how to reduce the key applications running on time to ensure that the scanner is able to scan time.
Recommended that the scan shows part of the program is placed in the interrupt processing section timer, it will ensure that the scanning frequency, in addition to the touch of a button switch button processing part of the program to the timer interrupt latency.
