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/*
* @brief LPC82x ADC driver
*
* @note
* Copyright(C) NXP Semiconductors, 2014
* All rights reserved.
*
* @par
* Software that is described herein is for illustrative purposes only
* which provides customers with programming information regarding the
* LPC products. This software is supplied "AS IS" without any warranties of
* any kind, and NXP Semiconductors and its licensor disclaim any and
* all warranties, express or implied, including all implied warranties of
* merchantability, fitness for a particular purpose and non-infringement of
* intellectual property rights. NXP Semiconductors assumes no responsibility
* or liability for the use of the software, conveys no license or rights under any
* patent, copyright, mask work right, or any other intellectual property rights in
* or to any products. NXP Semiconductors reserves the right to make changes
* in the software without notification. NXP Semiconductors also makes no
* representation or warranty that such application will be suitable for the
* specified use without further testing or modification.
*
* @par
* Permission to use, copy, modify, and distribute this software and its
* documentation is hereby granted, under NXP Semiconductors' and its
* licensor's relevant copyrights 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.
*/
#include "chip.h"
#include "adc_8xx.h"
/*****************************************************************************
* Private types/enumerations/variables
****************************************************************************/
/*****************************************************************************
* Public types/enumerations/variables
****************************************************************************/
/*****************************************************************************
* Private functions
****************************************************************************/
/*****************************************************************************
* Public functions
****************************************************************************/
/* Initialize the ADC peripheral */
void Chip_ADC_Init(LPC_ADC_T *pADC, uint32_t flags)
{
/* Power up ADC and enable ADC base clock */
Chip_SYSCTL_PowerUp(SYSCTL_SLPWAKE_ADC_PD);
Chip_Clock_EnablePeriphClock(SYSCTL_CLOCK_ADC);
/* Disable ADC interrupts */
pADC->INTEN = 0;
/* Set ADC control options */
pADC->CTRL = flags;
}
/* Shutdown ADC */
void Chip_ADC_DeInit(LPC_ADC_T *pADC)
{
pADC->INTEN = 0;
pADC->CTRL = 0;
/* Stop ADC clock and then power down ADC */
Chip_Clock_DisablePeriphClock(SYSCTL_CLOCK_ADC);
Chip_SYSCTL_PowerDown(SYSCTL_SLPWAKE_ADC_PD);
}
/* Start ADC calibration */
void Chip_ADC_StartCalibration(LPC_ADC_T *pADC)
{
/* Set calibration mode */
pADC->CTRL |= ADC_CR_CALMODEBIT;
/* Clear ASYNC bit */
pADC->CTRL &= ~ADC_CR_ASYNMODE;
/* Setup ADC for about 500KHz (per UM) */
Chip_ADC_SetClockRate(pADC, 500000);
/* Clearn low power bit */
pADC->CTRL &= ~ADC_CR_LPWRMODEBIT;
/* Calibration is only complete when ADC_CR_CALMODEBIT bit has cleared */
}
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