74 lines
2.9 KiB
C
74 lines
2.9 KiB
C
/****************************************************************************
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* include/nuttx/analog/mcp48xx.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_ANALOG_MCP48XX_H
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#define __INCLUDE_NUTTX_ANALOG_MCP48XX_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/analog/ioctl.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* IOCTL Commands ***********************************************************/
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/* Cmd: ANIOC_MCP48XX_DAC_SET_GAIN Arg: mcp48xx_set_gain_e value
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* Cmd: ANIOC_MCP48XX_DAC_ENABLE Arg: mcp48xx_dac_channel_e channel
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* Cmd: ANIOC_MCP48XX_DAC_DISABLE Arg: mcp48xx_dac_channel_e channel
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*/
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#define ANIOC_MCP48XX_DAC_SET_GAIN _ANIOC(AN_MCP48XX_FIRST + 0)
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#define ANIOC_MCP48XX_DAC_ENABLE _ANIOC(AN_MCP48XX_FIRST + 1)
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#define ANIOC_MCP48XX_DAC_DISABLE _ANIOC(AN_MCP48XX_FIRST + 2)
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/****************************************************************************
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* Public Types
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****************************************************************************/
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enum mcp48xx_gain_select_e
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{
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MCP48XX_GAIN_2X = 0 << 8U, /* VOUT = 2 * VREF * D/4096 */
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MCP48XX_GAIN_1X = 1 << 8U /* VOUT = VREF * D/4096 */
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};
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enum mcp48xx_dac_channel_e
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{
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MCP48XX_DAC_CHA = 1 << 0U, /* Select channel A */
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MCP48XX_DAC_CHB = 1 << 1U, /* Select channel B */
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MCP48XX_DAC_ALL = 0x3u /* Select both channels A and B */
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};
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enum mcp48xx_set_gain_e
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{
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MCP48XX_DAC_CHA_GAIN_2X = MCP48XX_DAC_CHA | MCP48XX_GAIN_2X,
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MCP48XX_DAC_CHB_GAIN_2X = MCP48XX_DAC_CHB | MCP48XX_GAIN_2X,
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MCP48XX_DAC_CHA_GAIN_1X = MCP48XX_DAC_CHA | MCP48XX_GAIN_1X,
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MCP48XX_DAC_CHB_GAIN_1X = MCP48XX_DAC_CHB | MCP48XX_GAIN_1X,
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MCP48XX_DAC_ALL_GAIN_2X = MCP48XX_DAC_ALL | MCP48XX_GAIN_2X,
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MCP48XX_DAC_ALL_GAIN_1X = MCP48XX_DAC_ALL | MCP48XX_GAIN_1X
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};
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#endif /* __INCLUDE_NUTTX_ANALOG_MCP48XX_H */
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