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/*
simduino.c
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/>.
*/
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <libgen.h>
#if __APPLE__
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif
#include <pthread.h>
#include "sim_avr.h"
#include "avr_ioport.h"
#include "sim_elf.h"
#include "sim_hex.h"
#include "sim_gdb.h"
#include "uart_pty.h"
#include "sim_vcd_file.h"
uart_pty_t uart_pty;
avr_t * avr = NULL;
avr_vcd_t vcd_file;
struct avr_flash {
char avr_flash_path[1024];
int avr_flash_fd;
};
// avr special flash initalization
// here: open and map a file to enable a persistent storage for the flash memory
void avr_special_init( avr_t * avr, void * data)
{
struct avr_flash *flash_data = (struct avr_flash *)data;
printf("%s\n", __func__);
// open the file
flash_data->avr_flash_fd = open(flash_data->avr_flash_path,
O_RDWR|O_CREAT, 0644);
if (flash_data->avr_flash_fd < 0) {
perror(flash_data->avr_flash_path);
exit(1);
}
// resize and map the file the file
(void)ftruncate(flash_data->avr_flash_fd, avr->flashend + 1);
ssize_t r = read(flash_data->avr_flash_fd, avr->flash, avr->flashend + 1);
if (r != avr->flashend + 1) {
fprintf(stderr, "unable to load flash memory\n");
perror(flash_data->avr_flash_path);
exit(1);
}
}
// avr special flash deinitalization
// here: cleanup the persistent storage
void avr_special_deinit( avr_t* avr, void * data)
{
struct avr_flash *flash_data = (struct avr_flash *)data;
printf("%s\n", __func__);
lseek(flash_data->avr_flash_fd, SEEK_SET, 0);
ssize_t r = write(flash_data->avr_flash_fd, avr->flash, avr->flashend + 1);
if (r != avr->flashend + 1) {
fprintf(stderr, "unable to load flash memory\n");
perror(flash_data->avr_flash_path);
}
close(flash_data->avr_flash_fd);
uart_pty_stop(&uart_pty);
}
int main(int argc, char *argv[])
{
struct avr_flash flash_data;
char boot_path[1024] = "ATmegaBOOT_168_atmega328.ihex";
uint32_t boot_base, boot_size;
char * mmcu = "atmega328p";
uint32_t freq = 16000000;
int debug = 0;
int verbose = 0;
for (int i = 1; i < argc; i++) {
if (!strcmp(argv[i] + strlen(argv[i]) - 4, ".hex"))
snprintf(boot_path, sizeof(boot_path), "%s", argv[i]);
else if (!strcmp(argv[i], "-d"))
debug++;
else if (!strcmp(argv[i], "-v"))
verbose++;
else {
fprintf(stderr, "%s: invalid argument %s\n", argv[0], argv[i]);
exit(1);
}
}
avr = avr_make_mcu_by_name(mmcu);
if (!avr) {
fprintf(stderr, "%s: Error creating the AVR core\n", argv[0]);
exit(1);
}
uint8_t * boot = read_ihex_file(boot_path, &boot_size, &boot_base);
if (!boot) {
fprintf(stderr, "%s: Unable to load %s\n", argv[0], boot_path);
exit(1);
}
if (boot_base > 32*1024*1024) {
mmcu = "atmega2560";
freq = 20000000;
}
printf("%s booloader 0x%05x: %d bytes\n", mmcu, boot_base, boot_size);
snprintf(flash_data.avr_flash_path, sizeof(flash_data.avr_flash_path),
"simduino_%s_flash.bin", mmcu);
flash_data.avr_flash_fd = 0;
// register our own functions
avr->custom.init = avr_special_init;
avr->custom.deinit = avr_special_deinit;
avr->custom.data = &flash_data;
avr_init(avr);
avr->frequency = freq;
memcpy(avr->flash + boot_base, boot, boot_size);
free(boot);
avr->pc = boot_base;
/* end of flash, remember we are writing /code/ */
avr->codeend = avr->flashend;
avr->log = 1 + verbose;
// even if not setup at startup, activate gdb if crashing
avr->gdb_port = 1234;
if (debug) {
avr->state = cpu_Stopped;
avr_gdb_init(avr);
}
uart_pty_init(avr, &uart_pty);
uart_pty_connect(&uart_pty, '0');
while (1) {
int state = avr_run(avr);
if ( state == cpu_Done || state == cpu_Crashed)
break;
}
}
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