164 Animated 7-segment character display

164 : Animated 7-segment character display

Design render
  • Author: Aron Dennen
  • Description: Displays 7-segment characters with animation
  • GitHub repository
  • Clock: 12500000 Hz

How it works

Animates the 7-segment display by reading in the input switches to create a custom 7-segment character. Nothing will be displayed until you toggle input 7 to start the character animation sequence.

Inputs 0 through 6 map to outputs 0 though 6 (display segments a through g). Output 7 becomes active while input 7 is active.

The uio inputs are used for an experimental pwm dimming feature, to enable pwm display dimming, set uio pin 7 active. uio inputs 0 through 6 set a 7-bit pwm dimming value on an 8-bit pwm unit. The pwm lsb input is tied to 0.

The circuit works by iterating over the character bit pattern, enabling segments sequentially at a speed of about 0.12 seconds per segment.

How to test

Toggle the input switches to create a character with inputs 0-6, toggle input 7 to start the character animation sequence.

Optionally dim the display by enabling the pwm feature described above.

External hardware

none

IO

#InputOutputBidirectional
0input0seg0pwm_bit1
1input1seg1pwm_bit2
2input2seg2pwm_bit3
3input3seg3pwm_bit4
4input4seg4pwm_bit5
5input5seg5pwm_bit6
6input6seg6pwm_bit7
7enable displayseg7usePwm

Chip location

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