1 /*
2 * @brief LPC15xx WWDT chip driver
3 *
4 * @note
5 * Copyright(C) NXP Semiconductors, 2013
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 "chip.h"
33
34 /*****************************************************************************
35 * Private types/enumerations/variables
36 ****************************************************************************/
37
38 /*****************************************************************************
39 * Public types/enumerations/variables
40 ****************************************************************************/
41
42 /*****************************************************************************
43 * Private functions
44 ****************************************************************************/
45
46 /*****************************************************************************
47 * Public functions
48 ****************************************************************************/
49
50 /* Initialize the Watchdog timer */
Chip_WWDT_Init(LPC_WWDT_T * pWWDT)51 void Chip_WWDT_Init(LPC_WWDT_T *pWWDT)
52 {
53 Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_WDT);
54
55 /* Disable watchdog */
56 pWWDT->MOD = 0;
57 pWWDT->TC = 0xFF;
58 pWWDT->WARNINT = 0x3FF;
59 pWWDT->WINDOW = 0xFFFFFF;
60 }
61
62 /* Clear WWDT interrupt status flags */
Chip_WWDT_ClearStatusFlag(LPC_WWDT_T * pWWDT,uint32_t status)63 void Chip_WWDT_ClearStatusFlag(LPC_WWDT_T *pWWDT, uint32_t status)
64 {
65 if (status & WWDT_WDMOD_WDTOF) {
66 pWWDT->MOD &= (~WWDT_WDMOD_WDTOF) & WWDT_WDMOD_BITMASK;
67 }
68
69 if (status & WWDT_WDMOD_WDINT) {
70 pWWDT->MOD |= WWDT_WDMOD_WDINT;
71 }
72 }
73