221 lines
7.6 KiB
C
221 lines
7.6 KiB
C
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/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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* Copyright 2016-2017 NXP
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "fsl_dac.h"
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/*******************************************************************************
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* Prototypes
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******************************************************************************/
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/*!
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* @brief Get instance number for DAC module.
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*
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* @param base DAC peripheral base address
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*/
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static uint32_t DAC_GetInstance(DAC_Type *base);
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/*******************************************************************************
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* Variables
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******************************************************************************/
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/*! @brief Pointers to DAC bases for each instance. */
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static DAC_Type *const s_dacBases[] = DAC_BASE_PTRS;
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#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
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/*! @brief Pointers to DAC clocks for each instance. */
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static const clock_ip_name_t s_dacClocks[] = DAC_CLOCKS;
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#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
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/*******************************************************************************
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* Codes
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******************************************************************************/
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static uint32_t DAC_GetInstance(DAC_Type *base)
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{
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uint32_t instance;
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/* Find the instance index from base address mappings. */
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for (instance = 0; instance < ARRAY_SIZE(s_dacBases); instance++)
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{
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if (s_dacBases[instance] == base)
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{
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break;
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}
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}
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assert(instance < ARRAY_SIZE(s_dacBases));
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return instance;
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}
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void DAC_Init(DAC_Type *base, const dac_config_t *config)
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{
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assert(NULL != config);
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uint8_t tmp8;
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#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
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/* Enable the clock. */
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CLOCK_EnableClock(s_dacClocks[DAC_GetInstance(base)]);
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#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
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/* Configure. */
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/* DACx_C0. */
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tmp8 = base->C0 & ~(DAC_C0_DACRFS_MASK | DAC_C0_LPEN_MASK);
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if (kDAC_ReferenceVoltageSourceVref2 == config->referenceVoltageSource)
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{
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tmp8 |= DAC_C0_DACRFS_MASK;
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}
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if (config->enableLowPowerMode)
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{
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tmp8 |= DAC_C0_LPEN_MASK;
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}
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base->C0 = tmp8;
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/* DAC_Enable(base, true); */
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/* Tip: The DAC output can be enabled till then after user sets their own available data in application. */
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}
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void DAC_Deinit(DAC_Type *base)
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{
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DAC_Enable(base, false);
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#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
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/* Disable the clock. */
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CLOCK_DisableClock(s_dacClocks[DAC_GetInstance(base)]);
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#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
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}
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void DAC_GetDefaultConfig(dac_config_t *config)
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{
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assert(NULL != config);
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config->referenceVoltageSource = kDAC_ReferenceVoltageSourceVref2;
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config->enableLowPowerMode = false;
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}
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void DAC_SetBufferConfig(DAC_Type *base, const dac_buffer_config_t *config)
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{
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assert(NULL != config);
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uint8_t tmp8;
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/* DACx_C0. */
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tmp8 = base->C0 & ~(DAC_C0_DACTRGSEL_MASK);
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if (kDAC_BufferTriggerBySoftwareMode == config->triggerMode)
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{
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tmp8 |= DAC_C0_DACTRGSEL_MASK;
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}
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base->C0 = tmp8;
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/* DACx_C1. */
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tmp8 = base->C1 &
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~(
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#if defined(FSL_FEATURE_DAC_HAS_WATERMARK_SELECTION) && FSL_FEATURE_DAC_HAS_WATERMARK_SELECTION
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DAC_C1_DACBFWM_MASK |
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#endif /* FSL_FEATURE_DAC_HAS_WATERMARK_SELECTION */
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DAC_C1_DACBFMD_MASK);
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#if defined(FSL_FEATURE_DAC_HAS_WATERMARK_SELECTION) && FSL_FEATURE_DAC_HAS_WATERMARK_SELECTION
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tmp8 |= DAC_C1_DACBFWM(config->watermark);
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#endif /* FSL_FEATURE_DAC_HAS_WATERMARK_SELECTION */
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tmp8 |= DAC_C1_DACBFMD(config->workMode);
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base->C1 = tmp8;
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/* DACx_C2. */
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tmp8 = base->C2 & ~DAC_C2_DACBFUP_MASK;
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tmp8 |= DAC_C2_DACBFUP(config->upperLimit);
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base->C2 = tmp8;
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}
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void DAC_GetDefaultBufferConfig(dac_buffer_config_t *config)
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{
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assert(NULL != config);
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config->triggerMode = kDAC_BufferTriggerBySoftwareMode;
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#if defined(FSL_FEATURE_DAC_HAS_WATERMARK_SELECTION) && FSL_FEATURE_DAC_HAS_WATERMARK_SELECTION
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config->watermark = kDAC_BufferWatermark1Word;
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#endif /* FSL_FEATURE_DAC_HAS_WATERMARK_SELECTION */
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config->workMode = kDAC_BufferWorkAsNormalMode;
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config->upperLimit = DAC_DATL_COUNT - 1U;
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}
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void DAC_SetBufferValue(DAC_Type *base, uint8_t index, uint16_t value)
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{
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assert(index < DAC_DATL_COUNT);
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base->DAT[index].DATL = (uint8_t)(0xFFU & value); /* Low 8-bit. */
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base->DAT[index].DATH = (uint8_t)((0xF00U & value) >> 8); /* High 4-bit. */
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}
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void DAC_SetBufferReadPointer(DAC_Type *base, uint8_t index)
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{
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assert(index < DAC_DATL_COUNT);
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uint8_t tmp8 = base->C2 & ~DAC_C2_DACBFRP_MASK;
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tmp8 |= DAC_C2_DACBFRP(index);
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base->C2 = tmp8;
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}
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void DAC_EnableBufferInterrupts(DAC_Type *base, uint32_t mask)
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{
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mask &= (
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#if defined(FSL_FEATURE_DAC_HAS_WATERMARK_DETECTION) && FSL_FEATURE_DAC_HAS_WATERMARK_DETECTION
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DAC_C0_DACBWIEN_MASK |
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#endif /* FSL_FEATURE_DAC_HAS_WATERMARK_DETECTION */
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DAC_C0_DACBTIEN_MASK | DAC_C0_DACBBIEN_MASK);
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base->C0 |= ((uint8_t)mask); /* Write 1 to enable. */
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}
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void DAC_DisableBufferInterrupts(DAC_Type *base, uint32_t mask)
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{
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mask &= (
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#if defined(FSL_FEATURE_DAC_HAS_WATERMARK_DETECTION) && FSL_FEATURE_DAC_HAS_WATERMARK_DETECTION
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DAC_C0_DACBWIEN_MASK |
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#endif /* FSL_FEATURE_DAC_HAS_WATERMARK_DETECTION */
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DAC_C0_DACBTIEN_MASK | DAC_C0_DACBBIEN_MASK);
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base->C0 &= (uint8_t)(~((uint8_t)mask)); /* Write 0 to disable. */
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}
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uint32_t DAC_GetBufferStatusFlags(DAC_Type *base)
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{
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return (uint32_t)(base->SR & (
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#if defined(FSL_FEATURE_DAC_HAS_WATERMARK_DETECTION) && FSL_FEATURE_DAC_HAS_WATERMARK_DETECTION
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DAC_SR_DACBFWMF_MASK |
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#endif /* FSL_FEATURE_DAC_HAS_WATERMARK_DETECTION */
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DAC_SR_DACBFRPTF_MASK | DAC_SR_DACBFRPBF_MASK));
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}
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void DAC_ClearBufferStatusFlags(DAC_Type *base, uint32_t mask)
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{
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mask &= (
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#if defined(FSL_FEATURE_DAC_HAS_WATERMARK_DETECTION) && FSL_FEATURE_DAC_HAS_WATERMARK_DETECTION
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DAC_SR_DACBFWMF_MASK |
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#endif /* FSL_FEATURE_DAC_HAS_WATERMARK_DETECTION */
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DAC_SR_DACBFRPTF_MASK | DAC_SR_DACBFRPBF_MASK);
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base->SR &= (uint8_t)(~((uint8_t)mask)); /* Write 0 to clear flags. */
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}
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