led_plex/port.asm

   1 ; port functions
   2
   3 PORT_INIT:
   4
   5         ; port b 0-3 -> output
   6         ldi tmp1,0x0f
   7         out DDRB,tmp1
   8
   9         ; g, rck, sck -> low / scl -> high
  10         cbi PORTB,(1<<0)|(1<<1)|(1<<2)
  11         sbi PORTB,(1<<3)
  12
  13         ; port d 6 -> output
  14         ldi tmp1,(1<<6)
  15         out DDRD,tmp1
  16
  17         ; ser -> low
  18         cbi PORTD,(1<<6)
  19
  20         ret
  21