I had some problems getting the AVR-IO up and doing something. Here is a sample program to help the next person.
For AVRSTUDIO4
;***** AVR-IO RELAY and SWITCH demonstration
;***** Setup with switch and small voltage across inputs
;***** 12-7-03 RW
.include “2313def.inc”
.def Delay1 = r17 ; Delay variable 1
.def Delay2 = r18 ; Delay variable 2
.def Temp = r19 ; Temporary register
.def Led = r20 ; Led9 store
.def Pin1 = r21 ; Input 1 state - pin PD2
.def Pin2 = r22 ; Input 2 state - pin PD3 (jmp on 2,3)
.def Pin3 = r23 ; Input 3 state - pin PD5
.def Pin4 = r24 ; Input 4 state - pin PD6 - Bottom away from RS232
;*** Other Notes
;*** Outputs:
;*** PB0 - Relay 4 - bottom away from RS232
;*** PB1 - Relay 3
;*** PB2 - Relay 2
;*** PB3 - Relay 1
;*** PB4 - LED9
;***
;*** Initialization
RESET:
CLR r17 ; Clear Register r17
CLR r18 ; Clear Register r18
CLR r19 ; Clear Register r19
CLR r20 ; Clear Register r20
CLR r21 ; Clear Register r21
CLR r22 ; Clear Register r22
CLR r23 ; Clear Register r23
CLR r24 ; Clear Register r24
SBR Temp, 16 ; Set temp to 00010000
;*** LED9 goes on when dropped from 1 to 0
;*** Relays go on when changed from 0 to 1
OUT DDRB,Temp ; Set PORTB to output turn relays off
;**** Test input/output
LOOP:
OUT PORTB,Temp ; Update LEDS
;*** Ceck switches
SBIS PIND,0x02 ; If (Port D, pin2 == 0) switch open
RJMP in1
RJMP relay1on
IN1RET:
SBIS PIND,0x03 ; If (Port D, pin3 == 0) switch open
RJMP in2
RJMP relay2on
IN2RET:
SBIS PIND,0x05 ; If (Port D, pin5 == 0) switch open
RJMP in3
RJMP relay3on
IN3RET:
SBIS PIND,0x06 ; If (Port D, pin6 == 0) switch open
RJMP in4
RJMP relay4on
IN4RET:
;*** Turn on LED9 if not already on
SBRC temp, 4
RJMP led
;**** Now wait a while to make LED changes visible.
DELAY:
DEC Delay1
BRNE DELAY
DEC Delay2
BRNE DELAY
RJMP LOOP ; Repeat loop forever
;**** LED9
LED:
CLR led
SBR led, 16
SBRC temp, 4
SUB temp, led
RJMP DELAY
;**** Button 1
in1: ; switch 1 closed turn on relay 1
CLR pin1
SBR pin1, 8
SBRS temp, 3
ADD temp, pin1
RJMP in1ret
relay1on: ; switch 1 open turn off relay 1
CLR pin1
SBR pin1, 8
SBRC temp, 3
SUB temp, pin1
RJMP in1ret
;**** Button 2
in2: ; switch 2 closed turn on relay 2
CLR pin2
SBR pin2, 4
SBRS temp, 2
ADD temp, pin2
RJMP in2ret
relay2on: ; switch 2 open turn off relay 2
CLR pin2
SBR pin2, 4
SBRC temp, 2
SUB temp, pin2
RJMP in2ret
;**** Button 3
in3: ; switch 3 closed turn on relay 3
CLR pin3
SBR pin3, 2
SBRS temp, 1
ADD temp, pin3
RJMP in3ret
relay3on: ; switch 3 open turn off relay 3
CLR pin3
SBR pin3, 2
SBRC temp, 1
SUB temp, pin3
RJMP in3ret
;**** Button 4
in4: ; switch 4 closed turn on relay 4
CLR pin4
SBR pin4, 1
SBRS temp, 0
ADD temp, pin4
RJMP in4ret
relay4on: ; switch 4 open turn off relay 4
CLR pin4
SBR pin4, 1
SBRC temp, 0
SUB temp, pin4
RJMP in4ret