1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/**********************************************************************
* $Id$ lpc_dac.c 2011-06-02
*//**
* @file lpc_dac.c
* @brief Contains all functions support for DAC firmware library on
* LPC
* @version 1.0
* @date 02. June. 2011
* @author NXP MCU SW Application Team
*
* Copyright(C) 2011, NXP Semiconductor
* All rights reserved.
*
***********************************************************************
* Software that is described herein is for illustrative purposes only
* which provides customers with programming information regarding the
* products. This software is supplied "AS IS" without any warranties.
* NXP Semiconductors assumes no responsibility or liability for the
* use of the software, conveys no license or title under any patent,
* copyright, or mask work right to the product. NXP Semiconductors
* reserves the right to make changes in the software without
* notification. NXP Semiconductors also make no representation or
* warranty that such application will be suitable for the specified
* use without further testing or modification.
* Permission to use, copy, modify, and distribute this software and its
* documentation is hereby granted, under NXP Semiconductors'
* relevant copyright in the software, without fee, provided that it
* is used in conjunction with NXP Semiconductors microcontrollers. This
* copyright, permission, and disclaimer notice must appear in all copies of
* this code.
**********************************************************************/
/* Peripheral group ----------------------------------------------------------- */
/** @addtogroup DAC
* @{
*/
#ifdef __BUILD_WITH_EXAMPLE__
#include "lpc_libcfg.h"
#else
#include "lpc_libcfg_default.h"
#endif /* __BUILD_WITH_EXAMPLE__ */
#ifdef _DAC
/* Includes ------------------------------------------------------------------- */
#include "lpc_dac.h"
#include "lpc_clkpwr.h"
#include "lpc_pinsel.h"
/* Private Functions ---------------------------------------------------------- */
/*********************************************************************//**
* @brief Get pointer to DAC peripheral
* @param[in] compId Component ID, normally is zero (0).
* @param[in] pinnum Pin number value, should be in range from 0..31
* @return Pointer to DAC peripheral component
**********************************************************************/
static LPC_DAC_TypeDef * DAC_GetPointer(uint8_t compId)
{
LPC_DAC_TypeDef *pComponent = LPC_DAC;
return pComponent;
}
/* Public Functions ----------------------------------------------------------- */
/** @addtogroup DAC_Public_Functions
* @{
*/
/*********************************************************************//**
* @brief Initial ADC configuration
* - Maximum current is 700 uA
* - Value to AOUT is 0
* @param[in] DAC_Id the ID of the DAC component that is using, should be: zero (0)
* @return None
***********************************************************************/
void DAC_Init(uint8_t DAC_Id)
{
/*
* Init DAC pin connect
* AOUT on P0.26
*/
PINSEL_ConfigPin(0, 26, 2);
PINSEL_SetAnalogPinMode(0,26,ENABLE);
//Enable DAC for the pin
PINSEL_DacEnable(0, 26, ENABLE);
//Set maximum current output as default
DAC_SetBias(DAC_Id, DAC_MAX_CURRENT_700uA);
}
/*********************************************************************//**
* @brief Update value to DAC
* @param[in] DAC_Id the ID of the DAC component that is using, should be: zero (0)
* @param[in] dac_value : value 10 bit to be converted to output
* @return None
***********************************************************************/
void DAC_UpdateValue (uint8_t DAC_Id,uint32_t dac_value)
{
uint32_t tmp;
LPC_DAC_TypeDef* pDac = DAC_GetPointer(DAC_Id);
tmp = pDac->CR & DAC_BIAS_EN;
tmp |= DAC_VALUE(dac_value);
// Update value
pDac->CR = tmp;
}
/*********************************************************************//**
* @brief Set Maximum current for DAC
* @param[in] DAC_Id the ID of the DAC component that is using, should be: zero (0)
* @param[in] bias : 0 is 700 uA
* 1 350 uA
* @return None
***********************************************************************/
void DAC_SetBias (uint8_t DAC_Id, uint32_t bias)
{
LPC_DAC_TypeDef* pDac = DAC_GetPointer(DAC_Id);
pDac->CR &=~DAC_BIAS_EN;
if (bias == DAC_MAX_CURRENT_350uA)
{
pDac->CR |= DAC_BIAS_EN;
}
}
/*********************************************************************//**
* @brief To enable the DMA operation and control DMA timer
* @param[in] DAC_Id the ID of the DAC component that is using, should be: zero (0)
* @param[in] DAC_ConverterConfigStruct pointer to DAC_CONVERTER_CFG_Type
* - DBLBUF_ENA : enable/disable DACR double buffering feature
* - CNT_ENA : enable/disable timer out counter
* - DMA_ENA : enable/disable DMA access
* @return None
***********************************************************************/
void DAC_ConfigDAConverterControl (uint8_t DAC_Id, DAC_CONVERTER_CFG_Type *DAC_ConverterConfigStruct)
{
LPC_DAC_TypeDef* pDac = DAC_GetPointer(DAC_Id);
pDac->CTRL &= ~DAC_DACCTRL_MASK;
if (DAC_ConverterConfigStruct->DBLBUF_ENA)
pDac->CTRL |= DAC_DBLBUF_ENA;
if (DAC_ConverterConfigStruct->CNT_ENA)
pDac->CTRL |= DAC_CNT_ENA;
if (DAC_ConverterConfigStruct->DMA_ENA)
pDac->CTRL |= DAC_DMA_ENA;
}
/*********************************************************************//**
* @brief Set reload value for interrupt/DMA counter
* @param[in] DAC_Id the ID of the DAC component that is using, should be: zero (0)
* @param[in] time_out time out to reload for interrupt/DMA counter
* @return None
***********************************************************************/
void DAC_SetDMATimeOut(uint8_t DAC_Id, uint32_t time_out)
{
LPC_DAC_TypeDef* pDac = DAC_GetPointer(DAC_Id);
pDac->CNTVAL = DAC_CCNT_VALUE(time_out);
}
/*********************************************************************//**
* @brief Check the interrupt/DMA counter is occured or not because of the timer counter
* @param[in] DAC_Id the ID of the DAC component that is using, should be: zero (0)
* @return None
***********************************************************************/
uint8_t DAC_IsIntRequested(uint8_t DAC_Id)
{
LPC_DAC_TypeDef* pDac = DAC_GetPointer(DAC_Id);
//Return the INT_DMA_REQ bit of D/A control register
return (pDac->CTRL & 0x01);
}
/**
* @}
*/
#endif /*_DAC*/
/**
* @}
*/
/* --------------------------------- End Of File ------------------------------ */
|
