Raspberry Pi 4 digit 7 segment display effects

27/11/2018

After the last post I began playing with a real 7 segment display with 4 digits using the Pi. My goal was to create text effects without using libraries.

displayword(unsigned char str[4]) // simply display a word, use in a loop
blinkword(unsigned char str[4], int repeat) // blink word once plus any integer > 0. < 0 will blink forever
runclock(void) // display the time on the display, forever
scrollword(char *string) // scroll the string from right to left with a small buffer of extra characters