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/**
* @file lpc17xx_dac.c
* @brief Contains all functions support for DAC firmware library on LPC17xx
* @version 2.0
* @date 21. May. 2010
* @author NXP MCU SW Application Team
**************************************************************************
* 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.
**********************************************************************/
/* Peripheral group ----------------------------------------------------------- */
/** @addtogroup DAC
* @{
*/
/* Includes ------------------------------------------------------------------- */
#include "lpc17xx_dac.h"
#include "lpc17xx_clkpwr.h"
/* If this source file built with example, the LPC17xx FW library configuration
* file in each example directory ("lpc17xx_libcfg.h") must be included,
* otherwise the default FW library configuration file must be included instead
*/
#ifdef __BUILD_WITH_EXAMPLE__
#include "lpc17xx_libcfg.h"
#else
#include "lpc17xx_libcfg_default.h"
#endif /* __BUILD_WITH_EXAMPLE__ */
#ifdef _DAC
/* Public Functions ----------------------------------------------------------- */
/** @addtogroup DAC_Public_Functions
* @{
*/
/*********************************************************************//**
* @brief Initial ADC configuration
* - Maximum current is 700 uA
* - Value to AOUT is 0
* @param[in] DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
* @return None
***********************************************************************/
void DAC_Init(LPC_DAC_TypeDef *DACx)
{
CHECK_PARAM(PARAM_DACx(DACx));
/* Set default clock divider for DAC */
// CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_DAC, CLKPWR_PCLKSEL_CCLK_DIV_4);
//Set maximum current output
DAC_SetBias(LPC_DAC,DAC_MAX_CURRENT_700uA);
}
/*********************************************************************//**
* @brief Update value to DAC
* @param[in] DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
* @param[in] dac_value : value 10 bit to be converted to output
* @return None
***********************************************************************/
void DAC_UpdateValue (LPC_DAC_TypeDef *DACx,uint32_t dac_value)
{
uint32_t tmp;
CHECK_PARAM(PARAM_DACx(DACx));
tmp = DACx->DACR & DAC_BIAS_EN;
tmp |= DAC_VALUE(dac_value);
// Update value
DACx->DACR = tmp;
}
/*********************************************************************//**
* @brief Set Maximum current for DAC
* @param[in] DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
* @param[in] bias : 0 is 700 uA
* 1 350 uA
* @return None
***********************************************************************/
void DAC_SetBias (LPC_DAC_TypeDef *DACx,uint32_t bias)
{
CHECK_PARAM(PARAM_DAC_CURRENT_OPT(bias));
DACx->DACR &=~DAC_BIAS_EN;
if (bias == DAC_MAX_CURRENT_350uA)
{
DACx->DACR |= DAC_BIAS_EN;
}
}
/*********************************************************************//**
* @brief To enable the DMA operation and control DMA timer
* @param[in] DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
* @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 (LPC_DAC_TypeDef *DACx,DAC_CONVERTER_CFG_Type *DAC_ConverterConfigStruct)
{
CHECK_PARAM(PARAM_DACx(DACx));
DACx->DACCTRL &= ~DAC_DACCTRL_MASK;
if (DAC_ConverterConfigStruct->DBLBUF_ENA)
DACx->DACCTRL |= DAC_DBLBUF_ENA;
if (DAC_ConverterConfigStruct->CNT_ENA)
DACx->DACCTRL |= DAC_CNT_ENA;
if (DAC_ConverterConfigStruct->DMA_ENA)
DACx->DACCTRL |= DAC_DMA_ENA;
}
/*********************************************************************//**
* @brief Set reload value for interrupt/DMA counter
* @param[in] DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
* @param[in] time_out time out to reload for interrupt/DMA counter
* @return None
***********************************************************************/
void DAC_SetDMATimeOut(LPC_DAC_TypeDef *DACx, uint32_t time_out)
{
CHECK_PARAM(PARAM_DACx(DACx));
DACx->DACCNTVAL = DAC_CCNT_VALUE(time_out);
}
/**
* @}
*/
#endif /* _DAC */
/**
* @}
*/
/* --------------------------------- End Of File ------------------------------ */
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