LPCOpen Platform  v1.03
LPCOpen Platform for NXP LPC Microcontrollers
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adc.c
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1 /*
2  * @brief Analog to digital converter 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 #include <stdio.h>
34 
64 /*****************************************************************************
65  * Private types/enumerations/variables
66  ****************************************************************************/
67 
68 #define _LPC_ADC_ID LPC_ADC
69 static ADC_Clock_Setup_T ADCSetup;
70 
71 /*****************************************************************************
72  * Public types/enumerations/variables
73  ****************************************************************************/
74 
75 /*****************************************************************************
76  * Private functions
77  ****************************************************************************/
78 
79 /* Print ADC value and delay */
80 static void App_print_ADC_value(uint16_t data)
81 {
82  volatile uint32_t j;
83  char out_str[5];
84  for (j = 4; j != 0; j--) {
85  out_str[j - 1] = (data % 10) + 48;
86  data /= 10;
87  }
88  out_str[4] = '\0';
89 
90  DEBUGSTR("\r\nADC value is ");
91  DEBUGSTR(out_str);
92 
93  /* Delay */
94  j = 500000;
95  while (j--) {}
96 }
97 
98 /* Simple ADC resr and display loop */
99 static void App_Polling_Test(void)
100 {
101  uint16_t dataADC;
102 
103  while (1) {
104  /* Start A/D conversion */
105  Chip_ADC_Set_StartMode(_LPC_ADC_ID, ADC_START_NOW, ADC_TRIGGERMODE_RISING);
106 
107  /* Waiting for A/D conversion complete */
108  while (Chip_ADC_Read_Status(_LPC_ADC_ID, ADC_CH0, ADC_DR_DONE_STAT) != SET) {}
109 
110  /* Read ADC value */
111  Chip_ADC_Read_Value(_LPC_ADC_ID, ADC_CH0, &dataADC);
112 
113  /* Print ADC value */
114  App_print_ADC_value(dataADC);
115  }
116 }
117 
118 /*****************************************************************************
119  * Public functions
120  ****************************************************************************/
121 
126 int main(void)
127 {
128  Board_Init();
129  Board_ADC_Init();
130  DEBUGSTR("ADC Demo\r\n");
131 
132  /*ADC Init */
133  Chip_ADC_Init(_LPC_ADC_ID, &ADCSetup);
134  Chip_ADC_Channel_Enable_Cmd(_LPC_ADC_ID, ADC_CH0, ENABLE);
135  App_Polling_Test();
136 
137  /* Should not run to here */
138  return 0;
139 }
140