LPCOpen Platform  v1.03
LPCOpen Platform for NXP LPC Microcontrollers
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
wkt.c
Go to the documentation of this file.
1 /*
2  * @brief Self Wake-up Timer (WKT) 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 
64 /*****************************************************************************
65  * Private types/enumerations/variables
66  ****************************************************************************/
67 
68 #define TICKRATE_HZ (10)/* 10 tick per second */
69 
70 #define WAKEUP_COUNT_5s (5 * 10000) /* 5 seconds (using 10Khz clock) */
71 
72 /*****************************************************************************
73  * Public types/enumerations/variables
74  ****************************************************************************/
75 
76 /*****************************************************************************
77  * Private functions
78  ****************************************************************************/
79 
80 /*****************************************************************************
81  * Public functions
82  ****************************************************************************/
83 
88 void WKT_IRQHandler(void)
89 {
90  Chip_WKT_ClearIntStatus(LPC_WKT);
91 }
92 
97 int main(void)
98 {
99  bool port0_6;
100  uint32_t i = 0, sleepCnt = 0x30000;
101  CHIP_PMU_MCUPOWER_T powerTest = PMU_MCU_SLEEP;
102 
103  /* Generic Initialization */
104  Board_Init();
105 
106  /* Enable AHB clock to the GPIO domain to trigger test mode. */
107  Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_GPIO);
108 
109  /* Alarm/wake timer as wakeup source */
110  Chip_SYSCTL_EnablePeriphWakeup(SYSCTL_WAKEUP_WKTINT);
111 
112  /* Enable WKT clock */
113  Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_WKT);
114 
115  /* Reset WKT */
116  Chip_SYSCTL_PeriphReset(RESET_WKT);
117 
118  /* configure PIN0.6 as an input */
119  Chip_GPIO_WriteDirBit(LPC_GPIO_PORT, LPC8XX_PORT_NUM, PIO6, false);
120 
121  /* configure PIN0.6 with pull-up */
122  Chip_IOCON_PinSetMode(LPC_IOCON, PIO6, PIN_MODE_PULLUP);
123 
124  /* Enable WKT interrupt */
125  NVIC_DisableIRQ(WKT_IRQn);
126  NVIC_EnableIRQ(WKT_IRQn);
127 
128  while (1) {
129  /* waiting for PIO0_6 going LOW to start Sleep test */
130  do {
131  port0_6 = Chip_GPIO_ReadPortBit(LPC_GPIO_PORT, LPC8XX_PORT_NUM, PIO6);
132  i++;
133  if (i > sleepCnt) {
134  i = 0;
135  Board_LED_Toggle(0);
136  }
137  } while (port0_6 == ENABLE);
138 
139  if (powerTest == PMU_MCU_SLEEP) {
140 
141  Chip_WKT_Start(LPC_WKT, WKT_CLKSRC_10KHZ, WAKEUP_COUNT_5s);
142  Chip_PMU_Sleep(LPC_PMU, powerTest);
143 
144  Chip_WKT_Stop(LPC_WKT);
145  powerTest = PMU_MCU_DEEP_SLEEP;
146  sleepCnt = 0x50000;
147  }
148  else if (powerTest == PMU_MCU_DEEP_SLEEP) {
149 
150  Chip_WKT_Start(LPC_WKT, WKT_CLKSRC_10KHZ, WAKEUP_COUNT_5s);
151  Chip_PMU_Sleep(LPC_PMU, powerTest);
152 
153  Chip_WKT_Stop(LPC_WKT);
154  powerTest = PMU_MCU_POWER_DOWN;
155  sleepCnt = 0x70000;
156  }
157  else if (powerTest == PMU_MCU_POWER_DOWN) {
158 
159  Chip_WKT_Start(LPC_WKT, WKT_CLKSRC_10KHZ, WAKEUP_COUNT_5s);
160  Chip_PMU_Sleep(LPC_PMU, powerTest);
161 
162  Chip_WKT_Stop(LPC_WKT);
163  powerTest = PMU_MCU_DEEP_PWRDOWN;
164  sleepCnt = 0x90000;
165  }
166  else if (powerTest == PMU_MCU_DEEP_PWRDOWN) {
167 
168  Chip_WKT_Start(LPC_WKT, WKT_CLKSRC_10KHZ, WAKEUP_COUNT_5s);
169  Chip_PMU_Sleep(LPC_PMU, powerTest);
170 
171  Chip_WKT_Stop(LPC_WKT);
172  powerTest = PMU_MCU_SLEEP;
173  sleepCnt = 0x30000;
174  }
175  }
176  return 0;
177 }
178