Atmel AVR ICE 200, User Manual

Page: 33 / 40

AVR ICE 200 User Guide 6-1
Section 6
Appendix
6.1 Emulating
AT90S1200 and
ATtiny10/11
6.1.1 Using the Include
Files Always use include files for the I/O registers addresses and for bit definitions in your
source code files. This will ease the process of porting code from one microcontroller to
another. The files can be found on the CD-ROM which is included in the ICE 200 kit.
Copy the include file to your project directory, and include it in the top of the program
code as shown below:
(AVR Assembler example)
.include "1200def.inc"
Then, when writing a value to a I/O register, use the following notation:
(AVR Assembler example)
ldi r16, (1<<DDD1) + (1<<DDD4) ; Set port D pin 1 and 4 as output and
; the rest as input.
out DDRD, r16
Note the use of the bit definitions. DDD1 and DDD4 are pin definitions in form of bit
position, and therefore they must be shifted this number of bits to the left to make a
correct mask.
Interrupt vector locations might differ from part-to-part. This is easily handled by using
the vector definitions found in the include files.
(AVR Assembler example)
.include "1200def.inc"
.org 0
rjmp RESET_Handler
.org INT0addr
rjmp INT0_Handler
.org OVF0addr
rjmp OVF0_Handler
.org ACIaddr
rjmp ACI_Handler
... ( program code starts here )