mirror of
git://projects.qi-hardware.com/antorcha.git
synced 2024-11-01 13:15:55 +02:00
112 lines
2.4 KiB
C
112 lines
2.4 KiB
C
/*
|
|
* fw/image.c - Image data (upload and conversion)
|
|
*
|
|
* 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>
|
|
|
|
#include "io.h"
|
|
#include "hash.h"
|
|
#include "proto.h"
|
|
#include "dispatch.h"
|
|
#include "secret.h"
|
|
#include "image.h"
|
|
|
|
|
|
static struct line images[2][MAX_LINES];
|
|
static const struct line *next_image;
|
|
static struct line *p, *end;
|
|
static bool failed;
|
|
|
|
const struct line *image = images[0];
|
|
|
|
|
|
#define MAP(port, value, group) ( \
|
|
((value) & 1 ? MASK(port, LED_##group##1) : 0) | \
|
|
((value) & 2 ? MASK(port, LED_##group##2) : 0) | \
|
|
((value) & 4 ? MASK(port, LED_##group##3) : 0) | \
|
|
((value) & 8 ? MASK(port, LED_##group##4) : 0) | \
|
|
((value) & 16 ? MASK(port, LED_##group##5) : 0) | \
|
|
((value) & 32 ? MASK(port, LED_##group##6) : 0) | \
|
|
((value) & 64 ? MASK(port, LED_##group##7) : 0) | \
|
|
((value) & 128 ? MASK(port, LED_##group##8) : 0))
|
|
|
|
|
|
struct line localize_line(uint8_t p0, uint8_t p1)
|
|
{
|
|
struct line res;
|
|
|
|
res.cb = MAP(B, p0, A) | MAP(B, p1, B) |
|
|
MAP(C, p0, A) | MAP(C, p1, B);
|
|
res.d = MAP(D, p0, A) | MAP(D, p1, B);
|
|
return res;
|
|
}
|
|
|
|
|
|
static void add_payload(const uint8_t *payload)
|
|
{
|
|
uint8_t i;
|
|
|
|
for (i = 0; i != PAYLOAD && p != end; i += 2)
|
|
*p++ = localize_line(payload[i], payload[i+1]);
|
|
}
|
|
|
|
|
|
static bool image_more(uint8_t seq, uint8_t limit, const uint8_t *payload)
|
|
{
|
|
switch (limit-seq) {
|
|
default:
|
|
add_payload(payload);
|
|
/* fall through */
|
|
case 3:
|
|
case 2:
|
|
hash_merge(payload, PAYLOAD);
|
|
break;
|
|
case 1:
|
|
hash_end();
|
|
failed = !hash_eq(payload, PAYLOAD, 0);
|
|
break;
|
|
case 0:
|
|
if (!hash_eq(payload, PAYLOAD, PAYLOAD))
|
|
failed = 1;
|
|
if (failed)
|
|
return 0;
|
|
image = next_image;
|
|
break;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
static bool image_first(uint8_t limit, const uint8_t *payload)
|
|
{
|
|
hash_init();
|
|
hash_merge_progmem(image_secret, sizeof(image_secret));
|
|
if (image == images[0])
|
|
p = images[1];
|
|
else
|
|
p = images[0];
|
|
next_image = p;
|
|
end = p+MAX_LINES;
|
|
memset(p, 0, (char *) end-(char *) p);
|
|
failed = 0;
|
|
return image_more(0, limit, payload);;
|
|
}
|
|
|
|
|
|
struct handler image_handler = {
|
|
.type = IMAGE,
|
|
.first = image_first,
|
|
.more = image_more,
|
|
};
|