From f940c4adac4ca97dda09e273a8561171dac10ea9 Mon Sep 17 00:00:00 2001 From: patacongo Date: Fri, 28 May 2010 02:41:26 +0000 Subject: [PATCH] Add DAC header file git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2707 42af7a65-404d-4744-a932-0658087f49c3 --- arch/arm/src/lpc17xx/lpc17_dac.h | 97 ++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100755 arch/arm/src/lpc17xx/lpc17_dac.h diff --git a/arch/arm/src/lpc17xx/lpc17_dac.h b/arch/arm/src/lpc17xx/lpc17_dac.h new file mode 100755 index 0000000000..4afa98b7bf --- /dev/null +++ b/arch/arm/src/lpc17xx/lpc17_dac.h @@ -0,0 +1,97 @@ +/************************************************************************************ + * arch/arm/src/lpc17xx/lpc17_dac.h + * + * Copyright (C) 2010 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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_DAC_H +#define __ARCH_ARM_SRC_LPC17XX_LPC17_DAC_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include + +#include "chip.h" +#include "lp17_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_DAC_H */