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bod.c
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1 /*
2 * @brief Brown-out detector example
3 *
4 * @note
5 * Copyright(C) NXP Semiconductors, 2012
6 * All rights reserved.
7 *
8 * @par
9 * Software that is described herein is for illustrative purposes only
10 * which provides customers with programming information regarding the
11 * LPC products. This software is supplied "AS IS" without any warranties of
12 * any kind, and NXP Semiconductors and its licensor disclaim any and
13 * all warranties, express or implied, including all implied warranties of
14 * merchantability, fitness for a particular purpose and non-infringement of
15 * intellectual property rights. NXP Semiconductors assumes no responsibility
16 * or liability for the use of the software, conveys no license or rights under any
17 * patent, copyright, mask work right, or any other intellectual property rights in
18 * or to any products. NXP Semiconductors reserves the right to make changes
19 * in the software without notification. NXP Semiconductors also makes no
20 * representation or warranty that such application will be suitable for the
21 * specified use without further testing or modification.
22 *
23 * @par
24 * Permission to use, copy, modify, and distribute this software and its
25 * documentation is hereby granted, under NXP Semiconductors' and its
26 * licensor's relevant copyrights in the software, without fee, provided that it
27 * is used in conjunction with NXP Semiconductors microcontrollers. This
28 * copyright, permission, and disclaimer notice must appear in all copies of
29 * this code.
30 */
31
32 #include "board.h"
33 #include <stdio.h>
34
64 /*****************************************************************************
65 * Private types/enumerations/variables
66 ****************************************************************************/
67
68 /*****************************************************************************
69 * Public types/enumerations/variables
70 ****************************************************************************/
71
72 /*****************************************************************************
73 * Private functions
74 ****************************************************************************/
75
76 void BOD_IRQHandler(void)
77 {
78 /* Toggle LED on if brown-out detector trips */
79 Board_LED_Set(0, true);
80
81 /* Disable interrupt so it won't keep firing */
82 NVIC_DisableIRQ(BOD_IRQn);
83 }
84
85 /*****************************************************************************
86 * Public functions
87 ****************************************************************************/
88
93 int main(void)
94 {
95 uint32_t sysResetStatus;
96
97 /* Generic Initialization */
98 Board_Init();
99
100 Board_LED_Set(0, false);
101
102 /* Set brown-out interrupt level with reset */
103 Chip_SYSCTL_SetBODLevels(SYSCTL_BODRSTLVL_2, SYSCTL_BODINTVAL_LVL3);
104 Chip_SYSCTL_EnableBODReset();
105
106 /* Enable BOD interrupt */
107 NVIC_ClearPendingIRQ(BOD_IRQn);
108 NVIC_EnableIRQ(BOD_IRQn);
109
110 /* If the board was reset due to a BOD event, the reset can be
111 detected here. If the board was completely powered off, the BOD
112 reset event won't be active. */
113 sysResetStatus = Chip_SYSCTL_GetSystemRSTStatus();
114 if ((sysResetStatus & SYSCTL_RST_BOD) == 0) {
115 /* Board was reset via a normal power-on reset event */
116 sysResetStatus |= SYSCTL_RST_POR;
117 } else {
118 /* Board was reset via a BOD eventt */
119 sysResetStatus |= SYSCTL_RST_BOD;
120 }
121
122 /* Clear reset status */
123 Chip_SYSCTL_ClearSystemRSTStatus(sysResetStatus);
124
125 /* Wait forever */
126 while (1) {
127 __WFI();
128 }
129
130 return 0;
131 }
132