Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Up & Down Counter Using Push Buttons

Hi, im trying to implement a counter that counts from 0 to 100 and vise versa. the counter must be controlled using 2 push buttons, one for incrementing and the other for decrementing for examp...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

The up1 and dw1 signals are used to store the previous values of the up and down input signals. Using the current and previous values, you can detect a status change, in order to count up and down only once when the button is pressed. If you just act on the current value of 'up' and 'down', then you will count on each clock cycle during which the button is pressed.