lpc17xx_dac.c
141 lines
| 5.0 KiB
| text/x-c
|
CLexer
jeandet@pc-de-jeandet3.LAB-LPP.LOCAL
|
r18 | /** | ||
* @file : lpc17xx_dac.c | ||||
* @brief : Contains all functions support for DAC firmware library on LPC17xx | ||||
* @version : 1.0 | ||||
* @date : 3. April. 2009 | ||||
* @author : HieuNguyen | ||||
************************************************************************** | ||||
* 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 | ||||
* @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 | ||||
* @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); | ||||
//DACx->DACR &= ~DAC_VALUE(0x3FF); | ||||
//DACx->DACR |= DAC_VALUE(dac_value); | ||||
// Update value | ||||
DACx->DACR = tmp; | ||||
} | ||||
/*********************************************************************//** | ||||
* @brief Set Maximum current for DAC | ||||
* @param[in] DACx pointer to LPC_DAC_TypeDef | ||||
* @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 | ||||
* @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 | ||||
* @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 ------------------------------ */ | ||||