152 lines
5.4 KiB
C
152 lines
5.4 KiB
C
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/**********************************************************************
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* $Id$ lpc17xx_dac.c 2010-05-21
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*//**
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* @file lpc17xx_dac.c
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* @brief Contains all functions support for DAC firmware library on LPC17xx
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* @version 2.0
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* @date 21. May. 2010
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* @author NXP MCU SW Application Team
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*
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* Copyright(C) 2010, NXP Semiconductor
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* All rights reserved.
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*
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***********************************************************************
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* products. This software is supplied "AS IS" without any warranties.
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* NXP Semiconductors assumes no responsibility or liability for the
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* use of the software, conveys no license or title under any patent,
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* copyright, or mask work right to the product. NXP Semiconductors
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* reserves the right to make changes in the software without
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* notification. NXP Semiconductors also make no representation or
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* warranty that such application will be suitable for the specified
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* use without further testing or modification.
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* Permission to use, copy, modify, and distribute this software and its
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* documentation is hereby granted, under NXP Semiconductors'
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* relevant copyright in the software, without fee, provided that it
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* is used in conjunction with NXP Semiconductors microcontrollers. This
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* copyright, permission, and disclaimer notice must appear in all copies of
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* this code.
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**********************************************************************/
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/* Peripheral group ----------------------------------------------------------- */
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/** @addtogroup DAC
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* @{
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*/
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/* Includes ------------------------------------------------------------------- */
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#include "lpc17xx_dac.h"
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#include "lpc17xx_clkpwr.h"
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/* If this source file built with example, the LPC17xx FW library configuration
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* file in each example directory ("lpc17xx_libcfg.h") must be included,
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* otherwise the default FW library configuration file must be included instead
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*/
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#ifdef __BUILD_WITH_EXAMPLE__
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#include "lpc17xx_libcfg.h"
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#else
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#include "lpc17xx_libcfg_default.h"
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#endif /* __BUILD_WITH_EXAMPLE__ */
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#ifdef _DAC
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/* Public Functions ----------------------------------------------------------- */
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/** @addtogroup DAC_Public_Functions
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* @{
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*/
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/*********************************************************************//**
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* @brief Initial ADC configuration
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* - Maximum current is 700 uA
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* - Value to AOUT is 0
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* @param[in] DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
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* @return None
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***********************************************************************/
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void DAC_Init(LPC_DAC_TypeDef *DACx)
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{
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CHECK_PARAM(PARAM_DACx(DACx));
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/* Set default clock divider for DAC */
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// CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_DAC, CLKPWR_PCLKSEL_CCLK_DIV_4);
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//Set maximum current output
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DAC_SetBias(LPC_DAC,DAC_MAX_CURRENT_700uA);
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}
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/*********************************************************************//**
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* @brief Update value to DAC
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* @param[in] DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
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* @param[in] dac_value : value 10 bit to be converted to output
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* @return None
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***********************************************************************/
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void DAC_UpdateValue (LPC_DAC_TypeDef *DACx,uint32_t dac_value)
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{
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uint32_t tmp;
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CHECK_PARAM(PARAM_DACx(DACx));
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tmp = DACx->DACR & DAC_BIAS_EN;
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tmp |= DAC_VALUE(dac_value);
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// Update value
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DACx->DACR = tmp;
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}
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/*********************************************************************//**
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* @brief Set Maximum current for DAC
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* @param[in] DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
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* @param[in] bias : 0 is 700 uA
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* 1 350 uA
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* @return None
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***********************************************************************/
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void DAC_SetBias (LPC_DAC_TypeDef *DACx,uint32_t bias)
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{
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CHECK_PARAM(PARAM_DAC_CURRENT_OPT(bias));
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DACx->DACR &=~DAC_BIAS_EN;
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if (bias == DAC_MAX_CURRENT_350uA)
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{
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DACx->DACR |= DAC_BIAS_EN;
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}
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}
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/*********************************************************************//**
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* @brief To enable the DMA operation and control DMA timer
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* @param[in] DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
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* @param[in] DAC_ConverterConfigStruct pointer to DAC_CONVERTER_CFG_Type
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* - DBLBUF_ENA : enable/disable DACR double buffering feature
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* - CNT_ENA : enable/disable timer out counter
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* - DMA_ENA : enable/disable DMA access
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* @return None
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***********************************************************************/
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void DAC_ConfigDAConverterControl (LPC_DAC_TypeDef *DACx,DAC_CONVERTER_CFG_Type *DAC_ConverterConfigStruct)
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{
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CHECK_PARAM(PARAM_DACx(DACx));
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DACx->DACCTRL &= ~DAC_DACCTRL_MASK;
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if (DAC_ConverterConfigStruct->DBLBUF_ENA)
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DACx->DACCTRL |= DAC_DBLBUF_ENA;
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if (DAC_ConverterConfigStruct->CNT_ENA)
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DACx->DACCTRL |= DAC_CNT_ENA;
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if (DAC_ConverterConfigStruct->DMA_ENA)
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DACx->DACCTRL |= DAC_DMA_ENA;
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}
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/*********************************************************************//**
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* @brief Set reload value for interrupt/DMA counter
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* @param[in] DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
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* @param[in] time_out time out to reload for interrupt/DMA counter
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* @return None
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***********************************************************************/
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void DAC_SetDMATimeOut(LPC_DAC_TypeDef *DACx, uint32_t time_out)
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{
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CHECK_PARAM(PARAM_DACx(DACx));
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DACx->DACCNTVAL = DAC_CCNT_VALUE(time_out);
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}
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/**
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* @}
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*/
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#endif /* _DAC */
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/**
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* @}
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*/
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/* --------------------------------- End Of File ------------------------------ */
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