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| author | rodri <rgl@antares-labs.eu> | 2021-06-05 11:10:23 +0000 |
|---|---|---|
| committer | rodri <rgl@antares-labs.eu> | 2021-06-05 11:10:23 +0000 |
| commit | edf5f145013aa28ffbc7f19f874cd489a92f8449 (patch) | |
| tree | 05a7dfdae1b63a79bdfbb1fab84af35a51b5b99c /asm/blinkdelay | |
| download | avrtoys-edf5f145013aa28ffbc7f19f874cd489a92f8449.tar.gz avrtoys-edf5f145013aa28ffbc7f19f874cd489a92f8449.tar.bz2 avrtoys-edf5f145013aa28ffbc7f19f874cd489a92f8449.zip | |
Diffstat (limited to 'asm/blinkdelay')
| -rwxr-xr-x | asm/blinkdelay/avrdasm | 2 | ||||
| -rw-r--r-- | asm/blinkdelay/blink.s | 24 | ||||
| -rw-r--r-- | asm/blinkdelay/dat.h | 20 | ||||
| -rw-r--r-- | asm/blinkdelay/makefile | 17 |
4 files changed, 63 insertions, 0 deletions
diff --git a/asm/blinkdelay/avrdasm b/asm/blinkdelay/avrdasm new file mode 100755 index 0000000..ea0707b --- /dev/null +++ b/asm/blinkdelay/avrdasm @@ -0,0 +1,2 @@ +#!/bin/sh +avr-objdump -D *.elf diff --git a/asm/blinkdelay/blink.s b/asm/blinkdelay/blink.s new file mode 100644 index 0000000..30219b1 --- /dev/null +++ b/asm/blinkdelay/blink.s @@ -0,0 +1,24 @@ +.include "dat.h" + +.globl main +main: + ldi r16, 1<<DDRB5 + ldi r17, 0<<PORTB5 + out DDRB, r16 + out PORTB, r17 +loop: + /* delay loop */ + ldi r18, 82 + ldi r19, 43 + ldi r20, 0 +l1: + dec r20 + brne l1 + dec r19 + brne l1 + dec r18 + brne l1 + in r16, PORTB + com r16 + out PORTB, r16 + rjmp loop diff --git a/asm/blinkdelay/dat.h b/asm/blinkdelay/dat.h new file mode 100644 index 0000000..d3783b6 --- /dev/null +++ b/asm/blinkdelay/dat.h @@ -0,0 +1,20 @@ +/* Data Registers */ +.equ PORTB, 0x05 +.equ PORTB0, 0 +.equ PORTB1, 1 +.equ PORTB2, 2 +.equ PORTB3, 3 +.equ PORTB4, 4 +.equ PORTB5, 5 +.equ PORTB6, 6 +.equ PORTB7, 7 +/* Data Direction Registers */ +.equ DDRB, 0x04 +.equ DDRB0, 0 +.equ DDRB1, 1 +.equ DDRB2, 2 +.equ DDRB3, 3 +.equ DDRB4, 4 +.equ DDRB5, 5 +.equ DDRB6, 6 +.equ DDRB7, 7 diff --git a/asm/blinkdelay/makefile b/asm/blinkdelay/makefile new file mode 100644 index 0000000..4ad8b12 --- /dev/null +++ b/asm/blinkdelay/makefile @@ -0,0 +1,17 @@ +CC=avr-gcc +AS=avr-as + +PORT=/dev/ttyACM0 +TARG=blink + +all: build + +build: + $(CC) -mmcu=atmega328p -o $(TARG).elf $(TARG).s + avr-objcopy -j .text -j .data -O ihex $(TARG).elf $(TARG).hex + +burn: + avrdude -v -p atmega328p -c arduino -P $(PORT) -b 115200 -D -U flash:w:$(TARG).hex + +clean: + rm -f $(TARG).elf $(TARG).hex |