LPCOpen Platform  v1.03
LPCOpen Platform for NXP LPC Microcontrollers
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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