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new port init + added schematic url
[my-code/atmel.git]
/
led_plex
/
port.asm
diff --git
a/led_plex/port.asm
b/led_plex/port.asm
index
55e90e2
..
b5aec4b
100644
(file)
--- a/
led_plex/port.asm
+++ b/
led_plex/port.asm
@@
-6,10
+6,20
@@
PORT_INIT:
ldi tmp1,0x0f
out DDRB,tmp1
ldi tmp1,0x0f
out DDRB,tmp1
- ; g, rck, sck -> low / scl -> high
- ldi tmp1,0x07
- out PORTB,tmp1
- sbi PORTB,3
+ ; disable hc595 outputs
+ sbi PORTB,0
+
+ ; rck -> low
+ cbi PORTB,1
+
+ ; clear hc595 registers
+ cbi PORTB,3
+
+ ; rck -> high (store shift register data)
+ sbi PORTB,1
+
+ ; enable outputs
+ cbi PORTB,0
; port d 6 -> output
sbi DDRD,6
; port d 6 -> output
sbi DDRD,6
@@
-17,6
+27,9
@@
PORT_INIT:
; ser -> low
cbi PORTD,6
; ser -> low
cbi PORTD,6
+ ; release hc595 register clear
+ sbi PORTB,3
+
ret
SET_HC595:
ret
SET_HC595: