在本设计中用到了几个定时模块，第一个定时是用于定时按键的抖动时间，因为

Several timing modules are used in this design. The first timing is used to time the jitter time of the key, because voltage jitter occurs when the key is pressed, but the jitter when the key is closed has an impact on the keyboard, so in order to ensure The correctness of key scanning, every time a closed key is scanned, it must be de-jittered. The software de-jitter method is used in this design, and the jitter timing is timed using the software delay. <br>The second timing function is the delay time when the digital tube is displayed, that is, when the digital tube is displayed, the method of looking up the meter is used to display, so a certain delay is needed to enable us to see the display clearly The delay used here is also a software delay.

In this design used a few time modules, the first time is used for the jitter time of the timed key, because when the key will appear voltage jitter, but the keyboard work is affected by the key closing jitter, so in order to ensure the correctness of the key scan, whenever the key is scanned to have a closed key, to be d jitter treatment. In this design, the software is used to shake the method, jitter timed by the software delay to time.<br>The second timed function is the delay time of the digital tube display time, that is, when the digital tube display is displayed by means of checking the table, so we need to use a certain delay, so that we can see clearly what is displayed, the delay used here is also the delay of the use of software.

In this design, several timing modules are used. The first timing module is used to timing the jitter time of the key. Because when the key is pressed, there will be voltage jitter, but what affects the keyboard work is the jitter when the key is closed. Therefore, in order to ensure the correctness of the key scanning, every time the close key is scanned, the jitter will be removed. This design uses the software to jitter method, jitter timing using software delay timing.<br>The second timing function is the delay time when the nixie tube is displayed, that is, when the nixie tube is displayed, the method of looking up the table is used for display, so we need to use a certain delay, so that we can see the displayed content clearly. The delay used here is also the delay of software.<br>