From a20f57e053845b7a56c66999e6887aa0cb8c711f Mon Sep 17 00:00:00 2001
From: hackbard <hackbard@hackdaworld.org>
Date: Sun, 31 May 2009 07:40:07 +0200
Subject: [PATCH] all leds on (multiplexed!)

---
 led_plex/main.asm  | 24 +++++++++++++++++-------
 led_plex/timer.asm | 16 ++++++++++++++++
 2 files changed, 33 insertions(+), 7 deletions(-)

diff --git a/led_plex/main.asm b/led_plex/main.asm
index 23b33c3..8a03d53 100644
--- a/led_plex/main.asm
+++ b/led_plex/main.asm
@@ -86,8 +86,11 @@ INIT:
 	; gio port init
 	rcall PORT_INIT
 
-	; timer init
-	;rcall TIMER_INIT
+	; timer0 init
+	rcall TIMER0_INIT
+
+	; timer0 interrupt enable
+	rcall TIMER0_INT_INIT
 
 	; uart init
 	rcall UART_INIT
@@ -100,18 +103,16 @@ INIT:
 	out SPL,tmp1
 
 	; global interrupt enable
-	;sei 
+	sei 
 
 	; signal ready output
 	ldi uart_rxtx,0x68
 	rcall UART_TX
 
-	; testing ... DO NOT CONNECT LEDS BY NOW !!!
+	; led init
 	ldi hc595_sink,0xff
-	ldi hc595_source,0xff
+	ldi hc595_source,0x01
 	rcall SET_HC595
-	ldi uart_rxtx,0x61
-	rcall UART_TX
 
 MAIN:
 
@@ -133,6 +134,15 @@ T1_OVF:
 	reti
 
 T0_OVF:
+
+	; shift source
+	rol hc595_source
+
+	; update sink
+
+	; set hc595
+	rcall SET_HC595
+
 	reti
 
 UART_RECEIVE:
diff --git a/led_plex/timer.asm b/led_plex/timer.asm
index e371f65..e6b8aec 100644
--- a/led_plex/timer.asm
+++ b/led_plex/timer.asm
@@ -1,2 +1,18 @@
 ; timer functions
 
+TIMER0_INIT:
+
+	; clock select
+	ldi tmp1,0x01
+	out TCCR0B,tmp1
+
+	ret
+
+TIMER0_INT_INIT:
+
+	; overflow interrupt
+	ldi tmp1,0x02
+	out TIMSK,tmp1
+
+	ret
+
-- 
2.20.1