LPCOpen Platform  v1.03
LPCOpen Platform for NXP LPC Microcontrollers
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
adc.c
Go to the documentation of this file.
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 
65 /*****************************************************************************
66  * Private types/enumerations/variables
67  ****************************************************************************/
68 
69 #define _LPC_ADC_ID LPC_ADC
70 static ADC_Clock_Setup_T ADCSetup;
71 
72 /*****************************************************************************
73  * Public types/enumerations/variables
74  ****************************************************************************/
75 
76 /*****************************************************************************
77  * Private functions
78  ****************************************************************************/
79 
80 /* Print ADC value and delay */
81 static void App_print_ADC_value(uint16_t data)
82 {
83  volatile uint32_t j;
84  char out_str[5];
85  for (j = 4; j != 0; j--) {
86  out_str[j - 1] = (data % 10) + 48;
87  data /= 10;
88  }
89  out_str[4] = '\0';
90 
91  DEBUGSTR("\r\nADC value is ");
92  DEBUGSTR(out_str);
93 
94  /* Delay */
95  j = 500000;
96  while (j--) {}
97 }
98 
99 /* Simple ADC resr and display loop */
100 static void App_Polling_Test(void)
101 {
102  uint16_t dataADC;
103 
104  while (1) {
105  /* Start A/D conversion */
106  Chip_ADC_Set_StartMode(_LPC_ADC_ID, ADC_START_NOW, ADC_TRIGGERMODE_RISING);
107 
108  /* Waiting for A/D conversion complete */
109  while (Chip_ADC_Read_Status(_LPC_ADC_ID, ADC_CH0, ADC_DR_DONE_STAT) != SET) {}
110 
111  /* Read ADC value */
112  Chip_ADC_Read_Value(_LPC_ADC_ID, ADC_CH0, &dataADC);
113 
114  /* Print ADC value */
115  App_print_ADC_value(dataADC);
116  }
117 }
118 
119 /*****************************************************************************
120  * Public functions
121  ****************************************************************************/
122 
127 int main(void)
128 {
129  Board_Init();
130  Board_ADC_Init();
131  DEBUGSTR("ADC Demo\r\n");
132 
133  /*ADC Init */
134  Chip_ADC_Init(_LPC_ADC_ID, &ADCSetup);
135  Chip_ADC_Channel_Enable_Cmd(_LPC_ADC_ID, ADC_CH0, ENABLE);
136  App_Polling_Test();
137 
138  /* Should not run to here */
139  return 0;
140 }
141