aboutsummaryrefslogtreecommitdiff
path: root/lib/stm32/crc.c
blob: bbbe1fd28e99386e565499c6fe314774751c66f7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
/*
 * This file is part of the libopencm3 project.
 *
 * Copyright (C) 2012 Karl Palsson <karlp@remake.is>
 *
 * This library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <libopencm3/stm32/crc.h>

void crc_reset(void)
{
	CRC_CR |= CRC_CR_RESET;
}

u32 crc_calculate(u32 data)
{
	CRC_DR = data;
	// Data sheet says this blocks until it's ready....
	return CRC_DR;
}

u32 crc_calculate_block(u32 *datap, int size)
{
	int i;
	for (i = 0; i < size; i++) {
		CRC_DR = datap[i];
	}
	return CRC_DR;
}