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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
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