b005f844f5
This commit adds basic support for electrically isolated 8 bit expander. The expander communicates with the MCU via SPI interface. Both single and multiple pin read are supported. Signed-off-by: Michal Lenc <michallenc@seznam.cz>
69 lines
2.6 KiB
C
69 lines
2.6 KiB
C
/****************************************************************************
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* drivers/ioexpander/iso1i813t.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 __DRIVERS_IOEXPANDER_ISO1I813T_H
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#define __DRIVERS_IOEXPANDER_ISO1I813T_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/mutex.h>
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#if defined(CONFIG_IOEXPANDER) && defined(CONFIG_IOEXPANDER_ISO1I813T)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Registers Definition */
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#define ISO1I813T_DIAG 0x00 /* Collective Diagnostics Register */
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#define ISO1I813T_INPDATA 0x02 /* Input Data Register */
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#define ISO1I813T_GLERR 0x04 /* Global Error Register */
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#define ISO1I813T_COEFIL 0x06 /* Filter Time for the Data and the Diagnostics */
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#define ISO1I813T_INTERR 0x16 /* Internal Error Register */
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#define ISO1I813T_GLCFG 0x18 /* Global Configuration Register */
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#define ISO1I813T_WRITE_OPS 1 << 7
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/* Configuration ************************************************************/
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/* Prerequisites:
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* CONFIG_SPI
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* I2C support is required
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* CONFIG_IOEXPANDER
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* Enables I/O expander support
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*
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* CONFIG_IOEXPANDER_ISO1I813T
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* Enables support for the ISO1I813T driver (Needs CONFIG_INPUT)
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* CONFIG_ISO1I813T_MULTIPLE
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* Can be defined to support multiple ISO1I813T devices on board.
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*/
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#ifndef CONFIG_SPI
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# error "CONFIG_SPI is required by ISO1I813T"
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#endif
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#endif /* CONFIG_IOEXPANDER && CONFIG_IOEXPANDER_ISO1I813T */
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#endif /* __DRIVERS_IOEXPANDER_ISO1I813T_H */
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