1 /*
2 * @brief Grouped GPIO Interrupt 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 #if defined(BOARD_NXP_LPCXPRESSO_1549)
39
40 /* GPIO pin for GROUPED GPIO interrupt. This is SW1-WAKE button switch input. */
41 #define TEST_BUTTON_PIN 17 /* GPIO pin number mapped to PININT */
42 #define TEST_BUTTON_PORT 0 /* GPIO port number mapped to PININT */
43
44 #else
45 #error "Grouped GPIO Interrupt not configured for this example"
46 #endif /* defined(BOARD_NXP_LPCXPRESSO_1549) */
47
48 /*****************************************************************************
49 * Public types/enumerations/variables
50 ****************************************************************************/
51
52 /*****************************************************************************
53 * Private functions
54 ****************************************************************************/
55
56 /*****************************************************************************
57 * Public functions
58 ****************************************************************************/
59
60 /**
61 * @brief Handle Group GPIO 0 interrupt
62 * @return Nothing
63 */
GINT0_IRQHandler(void)64 void GINT0_IRQHandler(void)
65 {
66 Chip_GPIOGP_ClearIntStatus(LPC_GPIOGROUP, 0);
67 Board_LED_Toggle(0);
68 }
69
70 /**
71 * @brief Main program body
72 * @return Does not return
73 */
main(void)74 int main(void)
75 {
76 /* Generic Initialization */
77 SystemCoreClockUpdate();
78 Board_Init();
79 Board_LED_Set(0, false);
80
81 /* Initialize GPIO grouped interrupts */
82 Chip_GPIOGP_Init(LPC_GPIOGROUP);
83
84 /* Set pin back to GPIO (on some boards may have been changed to something
85 else by Board_Init()) */
86 Chip_IOCON_PinMuxSet(LPC_IOCON, TEST_BUTTON_PORT, TEST_BUTTON_PIN,
87 (IOCON_DIGMODE_EN | IOCON_MODE_INACT) );
88
89 /* Group GPIO interrupt 0 will be invoked when the button is pressed. */
90 Chip_GPIO_SetPinDIRInput(LPC_GPIO, TEST_BUTTON_PORT, TEST_BUTTON_PIN);
91 Chip_GPIOGP_SelectLowLevel(LPC_GPIOGROUP, 0, TEST_BUTTON_PORT, 1 << TEST_BUTTON_PIN);
92 Chip_GPIOGP_EnableGroupPins(LPC_GPIOGROUP, 0, TEST_BUTTON_PORT, 1 << TEST_BUTTON_PIN);
93 Chip_GPIOGP_SelectAndMode(LPC_GPIOGROUP, 0);
94 Chip_GPIOGP_SelectEdgeMode(LPC_GPIOGROUP, 0);
95
96 /* Enable Group GPIO interrupt 0 */
97 NVIC_EnableIRQ(GINT0_IRQn);
98
99 /* Spin in a loop here. All the work is done in ISR. */
100 while (1) {}
101
102 /* Does not return */
103 return 0;
104 }
105