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adc_001.c
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1 /*
2 * @brief ADC Registers and control functions
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 "adc_001.h"
33
34 /*****************************************************************************
35 * Private types/enumerations/variables
36 ****************************************************************************/
37
38 /*****************************************************************************
39 * Public types/enumerations/variables
40 ****************************************************************************/
41
42 /*****************************************************************************
43 * Private functions
44 ****************************************************************************/
45
46 /*****************************************************************************
47 * Public functions
48 ****************************************************************************/
49
50 /* Initialize the ADC */
51 void IP_ADC_Init(IP_ADC_001_T *pADC, uint8_t div, uint8_t bitsAcc, uint32_t flag)
52 {
53 uint32_t cr;
54 #if defined(ADC_TRIM_SUPPORT)
55 pADC->ADTRM = 0xF00;
56 #endif
57 pADC->INTEN = 0; /* Disable all interrupts */
58
59 cr = pADC->CR & (~ADC_CONFIG_MASK);
60 #if defined(ADC_ACC_12BITS)
61 cr |= ADC_CR_CLKDIV(div) | flag;
62 #else
63 cr |= ADC_CR_CLKDIV(div) | ADC_CR_BITACC(bitsAcc) | flag;
64 #endif /*defined(ADC_ACC_12BITS)*/
65
66 pADC->CR = cr;
67 }
68
69 /* Shutdown ADC */
70 void IP_ADC_DeInit(IP_ADC_001_T *pADC)
71 {
72 pADC->INTEN = 0x00000100;
73 pADC->CR = 0;
74 }
75
76 /* Set burst mode for ADC */
77 void IP_ADC_SetBurstMode(IP_ADC_001_T *pADC, FunctionalState NewState)
78 {
79 #if defined(CHIP_LPC1347)
80 pADC->INTEN &= ~(1<<8);
81 #endif
82 if (NewState == DISABLE) {
83 pADC->CR &= ~ADC_CR_BURST;
84 }
85 else {
86 pADC->CR |= ADC_CR_BURST;
87 }
88 }
89
90 /* Get the ADC value */
91 Status IP_ADC_Get_Val(IP_ADC_001_T *pADC, uint8_t channel, uint16_t *data)
92 {
93 uint32_t temp;
94 temp = pADC->DR[channel];
95 if (!ADC_DR_DONE(temp)) {
96 return ERROR;
97 }
98 /* if(ADC_DR_OVERRUN(temp) && (pADC->CR & ADC_CR_BURST)) */
99 /* return ERROR; */
100 *data = (uint16_t) ADC_DR_RESULT(temp);
101 return SUCCESS;
102 }
103
104 /* Get ADC Channel status from ADC data register */
105 FlagStatus IP_ADC_GetStatus(IP_ADC_001_T *pADC, uint8_t channel, uint32_t StatusType)
106 {
107 switch (StatusType) {
108 case ADC_DR_DONE_STAT:
109 return (pADC->STAT & (1UL << channel)) ? SET : RESET;
110
111 case ADC_DR_OVERRUN_STAT:
112 channel += 8;
113 return (pADC->STAT & (1UL << channel)) ? SET : RESET;
114
115 case ADC_DR_ADINT_STAT:
116 return pADC->STAT >> 16 ? SET : RESET;
117
118 default:
119 break;
120 }
121 return RESET;
122 }
123
124 /* Set the edge start condition */
125 void IP_ADC_EdgeStartConfig(IP_ADC_001_T *pADC, uint8_t edge_mode)
126 {
127 if (edge_mode) {
128 pADC->CR |= ADC_CR_EDGE;
129 }
130 else {
131 pADC->CR &= ~ADC_CR_EDGE;
132 }
133 }
134
135 /* Enable/Disable ADC channel number */
136 void IP_ADC_SetChannelNumber(IP_ADC_001_T *pADC, uint8_t channel, FunctionalState NewState)
137 {
138 if (NewState == ENABLE) {
139 pADC->CR |= ADC_CR_CH_SEL(channel);
140 }
141 else {
142 pADC->CR &= ~ADC_CR_START_MASK;
143 pADC->CR &= ~ADC_CR_CH_SEL(channel);
144 }
145 }
146
147 /* Set start mode for ADC */
148 void IP_ADC_SetStartMode(IP_ADC_001_T *pADC, uint8_t start_mode)
149 {
150 uint32_t temp;
151 temp = pADC->CR & (~ADC_CR_START_MASK);
152 pADC->CR = temp | (ADC_CR_START_MODE_SEL((uint32_t) start_mode));
153 }
154
155 /* Enable/Disable interrupt for ADC channel */
156 void IP_ADC_Int_Enable(IP_ADC_001_T *pADC, uint8_t channel, FunctionalState NewState)
157 {
158 if (NewState == ENABLE) {
159 pADC->INTEN |= (1UL << channel);
160 }
161 else {
162 pADC->INTEN &= (~(1UL << channel));
163 }
164 }