1 /**
2 * \file
3 *
4 * \brief SAM Brown Out Detector Driver
5 *
6 * Copyright (C) 2015 Atmel Corporation. All rights reserved.
7 *
8 * \asf_license_start
9 *
10 * \page License
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions are met:
14 *
15 * 1. Redistributions of source code must retain the above copyright notice,
16 * this list of conditions and the following disclaimer.
17 *
18 * 2. Redistributions in binary form must reproduce the above copyright notice,
19 * this list of conditions and the following disclaimer in the documentation
20 * and/or other materials provided with the distribution.
21 *
22 * 3. The name of Atmel may not be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * 4. This software may only be redistributed and used in connection with an
26 * Atmel microcontroller product.
27 *
28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 * POSSIBILITY OF SUCH DAMAGE.
39 *
40 * \asf_license_stop
41 *
42 */
43 /*
44 * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
45 */
46 #include "bod.h"
47
48 /**
49 * \brief Configure a Brown Out Detector module.
50 *
51 * Configures a given BOD module with the settings stored in the given
52 * configuration structure.
53 *
54 * \param[in] conf Configuration settings to use for the specified BODVDD
55 *
56 * \retval STATUS_OK Operation completed successfully
57 * \retval STATUS_ERR_INVALID_ARG An invalid BOD was supplied
58 * \retval STATUS_ERR_INVALID_OPTION The requested BOD level was outside the acceptable range
59 */
bodvdd_set_config(struct bodvdd_config * const conf)60 enum status_code bodvdd_set_config(
61 struct bodvdd_config *const conf)
62 {
63 /* Sanity check arguments */
64 Assert(conf);
65
66 uint32_t temp = 0;
67
68 /* Check if module is enabled. */
69 if (SUPC->BODVDD.reg & SUPC_BODVDD_ENABLE) {
70 SUPC->BODVDD.reg &= ~SUPC_BODVDD_ENABLE;
71 }
72
73 /* Convert BOD prescaler, trigger action and mode to a bitmask */
74 temp |= (uint32_t)conf->prescaler | (uint32_t)conf->action |
75 (uint32_t)conf->mode_in_active | (uint32_t)conf->mode_in_standby;
76
77 if (conf->hysteresis == true) {
78 temp |= SUPC_BODVDD_HYST;
79 }
80
81 if (conf->run_in_standby == true) {
82 temp |= SUPC_BODVDD_RUNSTDBY;
83 }
84
85 if (conf->level > 0x3F) {
86 return STATUS_ERR_INVALID_ARG;
87 }
88
89 SUPC->BODVDD.reg = SUPC_BODVDD_LEVEL(conf->level) | temp;
90
91 return STATUS_OK;
92 }
93