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cmp.c
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1 /*
2 * @brief Analog Comparator 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
62 /*****************************************************************************
63 * Private types/enumerations/variables
64 ****************************************************************************/
65
66 #define CMP_ID 1
67
68 /*****************************************************************************
69 * Public types/enumerations/variables
70 ****************************************************************************/
71
72 /*****************************************************************************
73 * Private functions
74 ****************************************************************************/
75
76 /*****************************************************************************
77 * Public functions
78 ****************************************************************************/
79
84 int main(void)
85 {
86 /* initialize the board */
87 Board_Init();
88
89 Board_CMP_Init();
90
91 /* initialize the CMP */
92 Chip_CMP_Init();
93
94 /* Power-up */
95 Chip_CMP_EnableCurrentSrc(CMP_ENCTRL_ENABLE);
96 Chip_CMP_EnableBandGap(CMP_ENCTRL_ENABLE);
97 Chip_CMP_Enable(CMP_ID, CMP_ENCTRL_ENABLE);
98
99 /* Positive and negative references, both edges, no hysteresis */
100 Chip_CMP_SetPosVoltRef(CMP_ID, CMP_INPUT_CMPx_IN0);
101 Chip_CMP_SetNegVoltRef(CMP_ID, CMP_INPUT_INTERNAL_09VBG);
102 Chip_CMP_SetHysteresis(CMP_ID, CMP_HYS_NONE);
103
104 while (1) {
105 if (Chip_CMP_GetCmpStatus(CMP_ID)) {
106 Board_LED_Set(0, false);
107 }
108 else {
109 Board_LED_Set(0, true);
110 }
111 }
112
113 return 0;
114 }
115