QiwiCTF 2016 RE300_3 simulation code

Makefile

# 
# 	Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
#
#	This file is part of simavr.
#
#	simavr is free software: you can redistribute it and/or modify
#	it under the terms of the GNU General Public License as published by
#	the Free Software Foundation, either version 3 of the License, or
#	(at your option) any later version.
#
#	simavr is distributed in the hope that it will be useful,
#	but WITHOUT ANY WARRANTY; without even the implied warranty of
#	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#	GNU General Public License for more details.
#
#	You should have received a copy of the GNU General Public License
#	along with simavr.  If not, see <http://www.gnu.org/licenses/>.

target=	qiwitask
simavr = ../../

IPATH = .
IPATH += ../parts
IPATH += ${simavr}/include
IPATH += ${simavr}/simavr/sim

VPATH = .
VPATH += ../parts

LDFLAGS += -lpthread

all: obj ${target}

include ${simavr}/Makefile.common

board = ${OBJ}/${target}.elf

${board} : ${OBJ}/button.o
${board} : ${OBJ}/uart_pty.o
${board} : ${OBJ}/${target}.o

${target}: ${board}
	@echo $@ done

clean: clean-${OBJ}
	rm -rf *.a ${target} *.vcd

simavr.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <libgen.h>

#include "sim_avr.h"
#include "avr_ioport.h"
#include "sim_elf.h"
#include "sim_gdb.h"
#include "uart_pty.h"

#include "button.h"
button_t buttons[8];

uart_pty_t uart_pty;
avr_t * avr = NULL;

static void * avr_run_thread(void * oaram)
{
	char counter = 0;
	while (1) {
		avr_run(avr);
		for (int i = 0; i < 8; i++) {
			if (counter & (1 << i))
				button_press(&buttons[i], 1000);
		}
		counter++;
	}
	return NULL;
}


int main(int argc, char *argv[])
{
	elf_firmware_t f;
	const char *fname =  "task.elf";
	const char *mmcu = "atmega328p";
	elf_read_firmware(fname, &f);

	strcpy(f.mmcu, mmcu);
	printf("firmware %s f=%d mmcu=%s\n", fname, (int)f.frequency, f.mmcu);

	// Create AVR
	avr = avr_make_mcu_by_name(f.mmcu);
	if (!avr) {
		fprintf(stderr, "%s: AVR '%s' not known\n", argv[0], f.mmcu);
		exit(1);
	}
	avr_init(avr);
	avr_load_firmware(avr, &f);

	for (int i = 0; i < 8; i++)
	{
		button_init(avr, &buttons[i], "button");
		// "connect" the output irw of the button to the port pin of the AVR
		avr_connect_irq(
			buttons[i].irq + IRQ_BUTTON_OUT,
			avr_io_getirq(avr, AVR_IOCTL_IOPORT_GETIRQ('B'), i));
	}

	// Setup GDB server
	avr->gdb_port = 1234;
	if (1) {
		//avr->state = cpu_Stopped;
		avr_gdb_init(avr);
	}

	// Setup uart
	uart_pty_init(avr, &uart_pty);
	uart_pty_connect(&uart_pty, '0');

	// Run AVR
	avr_run_thread(NULL);
}