1 /*
2 * Copyright (c) 2016, Freescale Semiconductor, Inc.
3 * Copyright 2016-2017 NXP
4 * All rights reserved.
5 *
6 * SPDX-License-Identifier: BSD-3-Clause
7 */
8
9 #include "fsl_dac.h"
10
11 /*******************************************************************************
12 * Prototypes
13 ******************************************************************************/
14 /*!
15 * @brief Get instance number for DAC module.
16 *
17 * @param base DAC peripheral base address
18 */
19 static uint32_t DAC_GetInstance(LPDAC_Type *base);
20
21 /*******************************************************************************
22 * Variables
23 ******************************************************************************/
24 /*! @brief Pointers to DAC bases for each instance. */
25 static LPDAC_Type *const s_dacBases[] = LPDAC_BASE_PTRS;
26
27 /*! @brief Pointers to DAC clocks for each instance. */
28 static const clock_ip_name_t s_dacClocks[] = LPDAC_CLOCKS;
29
30 /*******************************************************************************
31 * Code
32 ******************************************************************************/
DAC_GetInstance(LPDAC_Type * base)33 static uint32_t DAC_GetInstance(LPDAC_Type *base)
34 {
35 uint32_t instance;
36
37 /* Find the instance index from base address mappings. */
38 for (instance = 0; instance < ARRAY_SIZE(s_dacBases); instance++)
39 {
40 if (s_dacBases[instance] == base)
41 {
42 break;
43 }
44 }
45
46 assert(instance < ARRAY_SIZE(s_dacBases));
47
48 return instance;
49 }
50
DAC_Init(LPDAC_Type * base,const dac_config_t * config)51 void DAC_Init(LPDAC_Type *base, const dac_config_t *config)
52 {
53 assert(NULL != config);
54
55 uint32_t tmp32 = 0U;
56
57 /* Enable the clock. */
58 CLOCK_EnableClock(s_dacClocks[DAC_GetInstance(base)]);
59
60 /* Reset the logic. */
61 DAC_SetReset(base, kDAC_ResetLogic);
62 DAC_ClearReset(base, kDAC_ResetLogic);
63
64 /* Reset the FIFO. */
65 DAC_SetReset(base, kDAC_ResetFIFO);
66 DAC_ClearReset(base, kDAC_ResetFIFO);
67
68 /* Configuration. */
69 if (kDAC_FIFOTriggerBySoftwareMode == config->fifoTriggerMode)
70 {
71 tmp32 |= LPDAC_GCR_TRGSEL_MASK; /* Software trigger. */
72 }
73 switch (config->fifoWorkMode)
74 {
75 case kDAC_FIFOWorkAsNormalMode: /* Normal FIFO. */
76 tmp32 |= LPDAC_GCR_FIFOEN_MASK;
77 break;
78 case kDAC_FIFOWorkAsSwingMode:
79 tmp32 |= LPDAC_GCR_FIFOEN_MASK | LPDAC_GCR_SWMD_MASK; /* Enable swing mode. */
80 break;
81 default: /* kDAC_FIFODisabled. */
82 break;
83 }
84 if (config->enableLowPowerMode)
85 {
86 tmp32 |= LPDAC_GCR_LPEN_MASK; /* Enable low power. */
87 }
88 if (kDAC_ReferenceVoltageSourceAlt2 == config->referenceVoltageSource)
89 {
90 tmp32 |= LPDAC_GCR_DACRFS_MASK;
91 }
92 base->GCR = tmp32;
93 base->FCR = LPDAC_FCR_WML(config->fifoWatermarkLevel);
94
95 /* Now, the DAC is disabled. It needs to be enabled in application. */
96 }
97
DAC_GetDefaultConfig(dac_config_t * config)98 void DAC_GetDefaultConfig(dac_config_t *config)
99 {
100 assert(config != NULL);
101
102 config->fifoWatermarkLevel = 0U;
103 config->fifoTriggerMode = kDAC_FIFOTriggerByHardwareMode;
104 config->fifoWorkMode = kDAC_FIFODisabled;
105 config->enableLowPowerMode = false;
106 config->referenceVoltageSource = kDAC_ReferenceVoltageSourceAlt1;
107 }
108
DAC_Deinit(LPDAC_Type * base)109 void DAC_Deinit(LPDAC_Type *base)
110 {
111 /* Disable the module. */
112 DAC_Enable(base, false);
113
114 /* Disable the clock. */
115 CLOCK_DisableClock(s_dacClocks[DAC_GetInstance(base)]);
116 }
117
