1 /*
2 * @brief RITimer example
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 "board.h"
33
34 /*****************************************************************************
35 * Private types/enumerations/variables
36 ****************************************************************************/
37
38 /* Repetitive timer rate in Hz */
39 #define TIME_INTERVAL 5
40
41 /*****************************************************************************
42 * Public types/enumerations/variables
43 ****************************************************************************/
44
45 /*****************************************************************************
46 * Private functions
47 ****************************************************************************/
48
49 /*****************************************************************************
50 * Public functions
51 ****************************************************************************/
52
53 /**
54 * @brief RIT interrupt handler
55 * @return Nothing
56 */
RIT_IRQHandler(void)57 void RIT_IRQHandler(void)
58 {
59 /* Clear interrupt */
60 Chip_RIT_ClearIntStatus(LPC_RITIMER);
61
62 Board_LED_Toggle(0);
63 }
64
65 /**
66 * @brief Main entry point
67 * @return Nothing
68 */
main(void)69 int main(void)
70 {
71 /* Generic Initialization */
72 SystemCoreClockUpdate();
73 Board_Init();
74
75 /* Initialize RITimer */
76 Chip_RIT_Init(LPC_RITIMER);
77
78 /* Configure RIT for a periodic interrupt tick rate */
79 Chip_RIT_SetTimerIntervalHz(LPC_RITIMER, TIME_INTERVAL);
80 Chip_RIT_Enable(LPC_RITIMER);
81
82 NVIC_EnableIRQ(RITIMER_IRQn);
83
84 /* LED is toggled in interrupt handler */
85 while (1) {
86 /* Sleep between interrupts */
87 __WFI();
88 }
89 }
90