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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