LPCOpen Platform  v1.03
LPCOpen Platform for NXP LPC Microcontrollers
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dac_001.c
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1 /*
2  * @brief DAC 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 "dac_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 /* Initial DAC configuration. Maximum update rate is 1MHz; value to AOUT is 0 */
51 void IP_DAC_Init(IP_DAC_001_T *pDAC)
52 {
53  /* Set maximum update rate 1MHz */
54  IP_DAC_SetBias(pDAC, DAC_MAX_UPDATE_RATE_1MHz);
55 }
56 
57 /* Update value to DAC buffer*/
58 void IP_DAC_UpdateValue(IP_DAC_001_T *pDAC, uint32_t dac_value)
59 {
60  uint32_t tmp;
61 
62  tmp = pDAC->CR & DAC_BIAS_EN;
63  tmp |= DAC_VALUE(dac_value);
64  /* Update value */
65  pDAC->CR = tmp;
66 }
67 
68 /* Set Maximum update rate for DAC */
69 void IP_DAC_SetBias(IP_DAC_001_T *pDAC, uint32_t bias)
70 {
71  pDAC->CR &= ~DAC_BIAS_EN;
72 
73  if (bias == DAC_MAX_UPDATE_RATE_400kHz) {
74  pDAC->CR |= DAC_BIAS_EN;
75  }
76 }
77 
78 /* Set reload value for interrupt/DMA counter */
79 void IP_DAC_SetDMATimeOut(IP_DAC_001_T *pDAC, uint32_t time_out)
80 {
81  pDAC->CNTVAL = DAC_CCNT_VALUE(time_out);
82 }
83 
84 /* Get status for interrupt/DMA time out */
85 IntStatus IP_DAC_GetIntStatus(IP_DAC_001_T *pDAC)
86 {
87  if (pDAC->CTRL & 0x01) {
88  return SET;
89  }
90 
91  return RESET;
92 }