From 76492de1fddc432eb4bf67df8cec93e00641eb78 Mon Sep 17 00:00:00 2001
From: hackbard <hackbard@tx2.hackdaworld.org>
Date: Wed, 13 May 2009 02:34:52 +0200
Subject: [PATCH] init of new files (of hdw tank project + some small mods,
 more to come ...)

---
 led_plex/main.asm | 129 ++++++++++++++++++++++++++++++++++++++++++++++
 led_plex/uart.asm |  60 +++++++++++++++++++++
 2 files changed, 189 insertions(+)
 create mode 100644 led_plex/main.asm
 create mode 100644 led_plex/uart.asm

diff --git a/led_plex/main.asm b/led_plex/main.asm
new file mode 100644
index 0000000..cfa8c2e
--- /dev/null
+++ b/led_plex/main.asm
@@ -0,0 +1,129 @@
+; main file of led_plex project
+;
+; author: hackbard@hackdaworld.org
+;
+
+; device specific definition file
+.include "../include/tn2313def.inc"
+
+; defines
+.def	tmp1		= r16
+.def	tmp2		= r17
+.def	uart_rxtx	= r18
+
+;
+; interrupts
+;
+
+; RESET
+rjmp INIT
+
+; INT0
+reti
+
+; INT1
+reti
+
+; T1 CAPT1
+reti
+
+; T1 COMP A
+reti
+
+; T1 OVF1
+rjmp T1_OVF1
+
+; T0 OVF0
+rjmp T0_OVF0
+
+; UART RX
+rjmp UART_RX
+
+; UART UDRE
+reti
+
+; UART TX
+reti
+
+; ANA COMP
+reti
+
+; PCINT
+reti
+
+; T1 COMP B
+reti
+
+; T0 COMP A
+reti
+
+; T0 COMP B
+reti
+
+; USI START
+reti
+
+; USI OVF
+reti
+
+; EE READY
+reti
+
+; WDT OVF
+reti
+
+
+; include control defines
+.include "ctrl.def"
+
+RESET:
+INIT:
+
+	; port init
+	rcall PORT_INIT
+
+	; timer init
+	rcall TIMER_INIT
+
+	; uart init
+	rcall UART_INIT
+
+	; uart interrupt enable
+	rcall UART_INT_RX_INIT
+
+	; set stackpointer
+	ldi tmp1,low(RAMEND)
+	out SPL,tmp1
+
+	; global interrupt enable
+	;sei 
+
+	; signal ready output
+	ldi uart_rxtx,0x23
+	rcall UART_TX
+
+MAIN:
+
+	; loop forever
+	rjmp MAIN
+
+
+; include subroutines
+.include "port.asm"
+.include "timer.asm"
+.include "uart.asm"
+
+
+;
+; interrupt routines
+;
+
+T1_OVF1:
+	reti
+
+T0_OVF0:
+	reti
+
+UART_RX:
+	reti
+
diff --git a/led_plex/uart.asm b/led_plex/uart.asm
new file mode 100644
index 0000000..e7a5830
--- /dev/null
+++ b/led_plex/uart.asm
@@ -0,0 +1,60 @@
+; uart functions
+
+; default uart settings / 19.2k @ 8 mhz
+; ifndef UART_BR_H
+.equ	UART_BR_H	= 0
+; ifndef UART_BR_L
+.equ	UART_BR_L	= 25
+
+UART_INIT:
+
+	; baudrate
+	ldi tmp1,UART_BR_H
+	sts UBRR0H,tmp1
+	ldi tmp1,UART_BR_L
+	out UBRR0L,tmp1
+
+	; enable
+	ldi tmp1,(1<<RXEN)|(1<<TXEN)
+	out UCSR0B,tmp1
+
+	; frame format -> 8n1
+	ldi tmp1,(1<<UCSZ00)|(1<<UCSZ01)
+	sts UCSR0C,tmp1
+
+	ret
+
+UART_INT_RX_INIT:
+
+	in tmp1,UCSR0B
+	sbr tmp1,(1<<RXCIE0)
+	out UCSR0B,tmp1
+
+	ret
+
+UART_INT_TX_INIT:
+
+	in tmp1,UCSR0B
+	sbr tmp1,(1<<TXCIE0)
+	out UCSR0B,tmp1
+
+	ret
+
+UART_RX:
+
+	; get/store received byte
+	sbis UCSR0A,RXC0
+		rjmp UART_RX
+	in uart_rxtx,UDR0
+
+	ret
+
+UART_TX:
+
+	; transmit content of uart_rxtx
+	sbis UCSR0A,UDRE
+		rjmp UART_TX
+	out UDR0,uart_rxtx
+
+	ret
+	
-- 
2.20.1