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ben-wpan/atusb/fw/boot.c
Werner Almesberger b42577bb72 atusb/fw/boot.c: adjusted the delay loop and don't race with dfu-util
- boot.c (MS_TO_LOOPS): increased loop count now that we no longer
  have to poll
- boot.c (main): increased delay from 2.0 s to 2.5 s, because we were
  racing with a sleep(2) in dfu-util
2011-06-11 14:26:52 -03:00

78 lines
1.3 KiB
C

/*
* fw/boot.c - DFU boot loader for ATUSB
*
* Written 2008-2011 by Werner Almesberger
* Copyright 2008-2011 Werner Almesberger
*
* This program 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 2 of the License, or
* (at your option) any later version.
*/
#include <stdint.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#define F_CPU 8000000UL
#include <util/delay.h>
#include "usb.h"
#include "dfu.h"
#include "board.h"
#include "spi.h"
#include "atusb/ep0.h"
#define MS_TO_LOOPS(ms) ((uint32_t) (ms)*335)
static void (*run_payload)(void) = 0;
int main(void)
{
/*
* pgm_read_byte gets cached and there doesn't seem to be any other
* way to dissuade gcc from doing this.
*/
volatile int zero = 0;
uint32_t loop = 0;
board_init();
reset_rf();
/* now we should be at 8 MHz */
usb_init();
dfu_init();
/* move interrupt vectors to the boot loader */
MCUCR = 1 << IVCE;
MCUCR = 1 << IVSEL;
sei();
led(1);
while (loop != MS_TO_LOOPS(2500)) {
if (dfu.state == dfuIDLE && pgm_read_byte(zero) != 0xff)
loop++;
else
loop = 0;
}
led(0);
cli();
usb_reset();
run_payload();
while (1); /* not reached */
}