mirror of
git://projects.qi-hardware.com/antorcha.git
synced 2024-11-22 13:22:48 +02:00
100 lines
1.8 KiB
C
100 lines
1.8 KiB
C
/*
|
|
* fw/fw.h - Firmware upload protocol
|
|
*
|
|
* Written 2012 by Werner Almesberger
|
|
* Copyright 2012 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 <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#define F_CPU 8000000UL
|
|
#include <util/delay.h>
|
|
|
|
#include "io.h"
|
|
#include "flash.h"
|
|
#include "proto.h"
|
|
#include "rf.h"
|
|
#include "fw.h"
|
|
|
|
|
|
static const uint8_t unlock_secret[PAYLOAD] = {
|
|
#include "unlock-secret.inc"
|
|
};
|
|
|
|
|
|
static bool locked = 1;
|
|
|
|
|
|
static bool fw_payload(uint8_t seq, uint8_t limit, const uint8_t *payload)
|
|
{
|
|
if (!seq) {
|
|
locked = memcmp(unlock_secret, payload, PAYLOAD) != 0;
|
|
flash_start();
|
|
return 1;
|
|
}
|
|
if (locked)
|
|
return 0;
|
|
if (!flash_can_write(PAYLOAD))
|
|
return 0;
|
|
flash_write(payload, PAYLOAD);
|
|
if (seq == limit)
|
|
flash_end_write();
|
|
return 1;
|
|
}
|
|
|
|
|
|
bool fw_packet(const uint8_t *buf, uint8_t len)
|
|
{
|
|
static uint8_t seq = 0;
|
|
static uint8_t limit;
|
|
uint8_t ack[] = { FIRMWARE+1, buf[1], buf[2] };
|
|
|
|
/* short flash to indicate reception */
|
|
SET(LED_B7);
|
|
_delay_ms(1);
|
|
CLR(LED_B7);
|
|
|
|
/* Check packet for formal validity */
|
|
|
|
if (len != 64+3)
|
|
return 0;
|
|
if (buf[0] != FIRMWARE)
|
|
return 0;
|
|
if (buf[1] > buf[2])
|
|
return 0;
|
|
|
|
/* Synchronize sequence numbers */
|
|
|
|
if (!buf[1]) {
|
|
seq = 0;
|
|
limit = buf[2];
|
|
} else {
|
|
if (buf[2] != limit)
|
|
return 0;
|
|
if (buf[1]+1 == seq)
|
|
goto ack;
|
|
if (buf[1] != seq)
|
|
return 0;
|
|
}
|
|
|
|
/* Process the payload */
|
|
|
|
if (!fw_payload(seq, limit, buf+3))
|
|
return 0;
|
|
seq++;
|
|
ack:
|
|
/* clearly visible short blink to indicate progress */
|
|
SET(LED_B6);
|
|
rf_send(ack, sizeof(ack));
|
|
CLR(LED_B6);
|
|
return 1;
|
|
}
|