152 lines
5.4 KiB
C
152 lines
5.4 KiB
C
/**********************************************************************
|
|
* $Id$ lpc17xx_dac.c 2010-05-21
|
|
*//**
|
|
* @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
|
|
*
|
|
* Copyright(C) 2010, 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
|
|
* @{
|
|
*/
|
|
|
|
/* 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 ------------------------------ */
|