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drivers/1wire/1wire_ds2xxx.h: add the driver for DS2XXX eeproms.
Supports these Maxim/Analog Devices eeproms with a scratchpad: DS2430,2431,2432,2433,28E04,28E07,28EC20. For each type of an eeprom, you create a new driver. Other than that, the driver is file oriented and supports seeks, for example. Signed-off-by: Stepan Pressl <pressl.stepan@gmail.com>
This commit is contained in:
Stepan Pressl
committed by
Alin Jerpelea
Alin Jerpelea
parent
d1e1643b84
commit
84b0492fbd
829
drivers/1wire/1wire_ds2xxx.c
Normal file
829
drivers/1wire/1wire_ds2xxx.c
Normal file
File diff suppressed because it is too large
Load Diff
@@ -27,5 +27,10 @@ if(CONFIG_1WIRE)
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list(APPEND SRCS ds28e17.c)
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endif()
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# Include the 1WIRE driver for DS2XXX EEPROMs
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if(CONFIG_1WIRE_EE_DS2XXX)
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list(APPEND SRCS 1wire_ds2xxx.c)
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endif()
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target_sources(drivers PRIVATE ${SRCS})
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endif()
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@@ -18,4 +18,27 @@ config 1WIRE_DS28E17
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---help---
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Enable support for the Maxim DS28E17 1-wire to I2C converter
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config 1WIRE_EE_DS2XXX
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bool "Support for Maxim/Analog Devices 1wire DS2XXX EEPROM devices"
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default n
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depends on 1WIRE
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---help---
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Enable support for 1WIRE DS2XXX EEPROMs.
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The list of supported devices:
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DS2430: 32 bytes, 1 page
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DS2431: 128 bytes, 4 pages
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DS2432: 128 bytes, 4 pages
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DS2433: 512 bytes, 16 pages
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DS28E04: 512 bytes, 16 pages
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DS28E07: 128 bytes, 4 pages
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DS28EC20: 2560 bytes, 32 pages
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if 1WIRE_EE_DS2XXX
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config 1WIRE_EE_DS2XXX_MEMSONBUS
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int "Maximum number of DS2XXX eeproms on the same bus"
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default 10
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endif # 1WIRE_EE_DS2XXX
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endif # 1WIRE
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@@ -28,6 +28,10 @@ ifeq ($(CONFIG_1WIRE_DS28E17),y)
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CSRCS += ds28e17.c
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endif
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ifeq ($(CONFIG_1WIRE_EE_DS2XXX),y)
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CSRCS += 1wire_ds2xxx.c
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endif
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# Include 1wire device driver build support
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DEPPATH += --dep-path 1wire
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88
include/nuttx/1wire/1wire_ds2xxx.h
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88
include/nuttx/1wire/1wire_ds2xxx.h
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@@ -0,0 +1,88 @@
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/****************************************************************************
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* include/nuttx/1wire/1wire_ds2xxx.h
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*
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* SPDX-License-Identifier: Apache-2.0
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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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* Author: Stepan Pressl <pressl.stepan@gmail.com>
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* <pressste@fel.cvut.cz>
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_EEPROM_1WIRE_DS2XXX_H
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#define __INCLUDE_NUTTX_EEPROM_1WIRE_DS2XXX_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 <sys/types.h>
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#include <nuttx/1wire/1wire.h>
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* All device specific commands for the scratchpad are luckily the same
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* for all the devices.
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*/
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#define DS2XXX_WRITE_SCRATCHPAD 0x0f
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#define DS2XXX_READ_SCRATCHPAD 0xaa
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#define DS2XXX_COPY_SCRATCHPAD 0x55
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#define DS2XXX_READ_MEMORY 0xf0
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/* There are other commands, also. For example, the common commands
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* have a different code than specified in drivers/1wire/1wire.c.
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*/
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#define DS2XXX_MATCH_ROM 0x55
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/* DS28E05 has a different architecture,
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* as it does not use a scratchpad. Let's keep this device out of here.
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*/
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enum ds2xxx_eeproms_e
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{
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EEPROM_DS2430 = 0,
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EEPROM_DS2431,
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EEPROM_DS2432,
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EEPROM_DS2433,
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EEPROM_DS28E04,
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EEPROM_DS28E07,
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EEPROM_DS28EC20,
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EEPROM_DS_COUNT
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: ds2xxx_initialize
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*
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* Description: Bind a onewire_master_s struct to this driver,
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* capable of interfacing DS2XXX 1Wire EEPROMs. The user must specify
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* the device type and also the name of the device (e.g. /dev/ds2xxx).
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*
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****************************************************************************/
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int ds2xxx_initialize(FAR struct onewire_dev_s *dev,
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enum ds2xxx_eeproms_e devtype, FAR char *devname);
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#endif /* __INCLUDE_NUTTX_EEPROM_1WIRE_DS2XXX_H */
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