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/************************************************************************************
* arch/arm/src/lpc17xx/chip/lpc17_dac.h
*
* Copyright (C) 2010, 2013 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
************************************************************************************/
#ifndef __ARCH_ARM_SRC_LPC17XX_LPC17_CHIP_DAC_H
#define __ARCH_ARM_SRC_LPC17XX_LPC17_CHIP_DAC_H
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include "chip.h"
#include "chip/lpc17_memorymap.h"
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* Register offsets *****************************************************************/
#define LPC17_DAC_CR_OFFSET 0x0000 /* D/A Converter Register */
#define LPC17_DAC_CTRL_OFFSET 0x0004 /* DAC Control register */
#define LPC17_DAC_CNTVAL_OFFSET 0x0008 /* DAC Counter Value register */
/* Register addresses ***************************************************************/
#define LPC17_DAC_CR (LPC17_DAC_BASE+LPC17_DAC_CR_OFFSET)
#define LPC17_DAC_CTRL (LPC17_DAC_BASE+LPC17_DAC_CTRL_OFFSET)
#define LPC17_DAC_CNTVAL (LPC17_DAC_BASE+LPC17_DAC_CNTVAL_OFFSET)
/* Register bit definitions *********************************************************/
/* D/A Converter Register */
/* Bits 0-5: Reserved */
#define DAC_CR_VALUE_SHIFT (6) /* Bits 6-15: Controls voltage on the AOUT pin */
#define DAC_CR_VALUE_MASK (0x3ff << DAC_CR_VALUE_SHIFT)
#define DAC_CR_BIAS (1 << 16) /* Bit 16: Controls DAC settling time */
/* Bits 17-31: Reserved */
/* DAC Control register */
#define DAC_CTRL_INTDMAREQ (1 << 0) /* Bit 0: Timer timed out */
#define DAC_CTRL_DBLBUFEN (1 << 1) /* Bit 1: Enable DACR double-buffering */
#define DAC_CTRL_CNTEN (1 << 2) /* Bit 2: Enable timeout counter */
#define DAC_CTRL_DMAEN (1 << 3) /* Bit 3: Enable DMA access */
/* Bits 4-31: Reserved */
/* DAC Counter Value register */
#define DAC_CNTVAL_SHIFT (0) /* Bits 0-15: Reload value for DAC interrupt/DMA timer */
#define DAC_CNTVAL_MASK (0xffff << DAC_CNTVAL_SHIFT)
/* Bits 8-31: Reserved */
/************************************************************************************
* Public Types
************************************************************************************/
/************************************************************************************
* Public Data
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
#endif /* __ARCH_ARM_SRC_LPC17XX_LPC17_CHIP_DAC_H */
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