* arch/arm/src/samv7/sam_dac.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __ARCH_ARM_SRC_SAMV7_SAM_DAC_H
#define __ARCH_ARM_SRC_SAMV7_SAM_DAC_H
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/analog/dac.h>
#include "hardware/sam_dacc.h"
#if defined(CONFIG_SAMV7_DAC0) || defined(CONFIG_SAMV7_DAC1)
* Pre-processor definitions
****************************************************************************/
* configuration file.
*/
#if !defined(CONFIG_SAMV7_DAC_DMA_BUFFER_SIZE)
# define CONFIG_SAMV7_DAC_DMA_BUFFER_SIZE 8
#elif CONFIG_SAMV7_DAC_DMA_BUFFER_SIZE > 65535
# warning "CONFIG_SAMV7_DAC_DMA_BUFFER_SIZE value does not fit into uint16_t, limiting it to 65535"
# undef CONFIG_SAMV7_DAC_DMA_BUFFER_SIZE
# define CONFIG_SAMV7_DAC_DMA_BUFFER_SIZE (65535)
#endif
#if !defined(CONFIG_SAMV7_DAC_TRIGGER_FREQUENCY)
# define CONFIG_SAMV7_DAC_TRIGGER_FREQUENCY 8000
#endif
*
* Given:
* MCK = 150MHz
* DACClock = 16MHz
* Then:
* PRESCAL = 7
*/
#if !defined(CONFIG_SAMV7_DAC_PRESCAL)
#define CONFIG_SAMV7_DAC_PRESCAL (7)
#elif CONFIG_SAMV7_DAC_PRESCAL > 15
# warning "Maximum valid CONFIG_SAMV7_DAC_PRESCAL value is 15"
#endif
#if !defined(CONFIG_SAMV7_DAC_TRIGGER_SELECT)
#define CONFIG_SAMV7_DAC_TRIGGER_SELECT (3)
#elif CONFIG_SAMV7_DAC_TRIGGER_SELECT < 1 || CONFIG_SAMV7_DAC_TRIGGER_SELECT > 3
# warning "Only CONFIG_SAMV7_DAC_TRIGGER_SELECT == [1-3] is supported"
#endif
* Public Types
****************************************************************************/
* Public Function Prototypes
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
* Name: sam_dac_initialize
*
* Description:
* Initialize the DAC
*
* Input Parameters:
* intf - The DAC interface number.
*
* Returned Value:
* Valid DAC device structure reference on success; a NULL on failure
*
****************************************************************************/
struct dac_dev_s;
struct dac_dev_s *sam_dac_initialize(int intf);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif
#endif