The zephyr-gpio w1 driver introduced in this commit implements
all routines for the w1 api on top of the zephyr gpio driver.
W1 bit read, write, and reset operations are executed by
bit-banging the selected gpio.
Signed-off-by: Hudson C. Dalpra <hudson@bduncanltd.com>
Do not enable subsystem/driver shell modules by default and stop abusing
CONFIG_SHELL_MINIMAL, which is internal to the shell subsystem, to decide
when to enable a driver shell.
The list of shell modules has grown considerably through the
years. Enabling CONFIG_SHELL for doing e.g. an interactive debug session
leads to a large number of shell modules also being enabled unless
explicitly disabled, which again leads to non-negligible increases in
RAM/ROM usage.
This commit attempts to establish a policy of subsystem/driver shell
modules being disabled by default, requiring the user/application to
explicitly enable only those needed.
Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
For systems with a true dynamic 1-Wire nature, the 1-Wire devices
cannot be defined in the DeviceTree (the number of slaves in
the system is not known during the build time).
In other words, there are no pre-defined 1-Wire devices on the bus in
DeviceTree, and thus the slave_count variable is always zero.
That means the skip_rom functionality will always be called even if
there are multiple devices connected to the bus.
This commit allows the user to override this original behavior and avoid
the skip_rom call by ignoring the slave count variable.
Also, this work preserves full backward compatibility.
Signed-off-by: Pavel Hübner <pavel.hubner@hardwario.com>
This adds a driver for the DS2482-800 1-wire multi channel bus driver.
The driver uses a split architecture in order to share a common lock
among all configured channels of a single IC.
Signed-off-by: Caspar Friedrich <c.s.w.friedrich@gmail.com>
Unify the drivers/*/Kconfig menuconfig title strings to the format
"<class> [(acronym)] [bus] drivers".
Including both the full name of the driver class and an acronym makes
menuconfig more user friendly as some of the acronyms are less well-known
than others. It also improves Kconfig search, both via menuconfig and via
the generated Kconfig documentation.
Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
Add CONFIG_CRC for building CRC related routines.
CRC routines are now being built for each application, whether used or
not and are add in the build system unconditionally.
Keep CONFIG_CRC enabled by default for now and until all users have
converted to use the new option.
Partial fix for #50654
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This commit introduces the 1-wire master driver for maxim ds2485.
The ds2485 master has nearly the same (1-wire) feature set and
i2c-interface as the ds2477.
Therefore the common parts are extracted, but to avoid
any nda troubles only the ds2485 specific part is included.
Compared to older 1-wire masters, the ds2485 supports higher level
commands, supporting multi byte operations, search next, automatic crc
calculation.
In this driver only basic read and write operations are supported,
further hardware features are not yet utilized by the driver.
Signed-off-by: Thomas Stranger <thomas.stranger@outlook.com>
This commit implements shell support for 1-Wire.
Commands for bus-reset, bit-, byte-, and block- communication,
as well as search and configuration are implemented.
- write_byte, and write_block perform a reset before,
in case the option "-r" is passed.
- using read_io_options() function to parse the reset option,
as this allows to easily add further options in the future.
- configuration type can be specified either as number or as name.
Signed-off-by: Thomas Stranger <thomas.stranger@outlook.com>
This adds a driver for Maxims DS2484 Single-Channel 1-Wire master
driver. The DS2484 features an extra pin to enable sleep modes which
is available if the pin is configured in the device tree.
Signed-off-by: Caspar Friedrich <c.s.w.friedrich@gmail.com>
The zephyr-serial w1 driver introduced in this commit implements
all routines for the w1 api on top of the zephyr serial driver.
W1 bit read, write, and reset operations are executed by issuing
polling zephyr serial byte read and write operations.
The driver should be usable on most platforms in zephyr that have
implemented support for the polling procedures of the serial driver.
As not all serial drivers are implemented exactly the same minor
additional quirks may be needed on some platforms.
The most notable difference of polling serial driver implementations
seems to be that some return immediately from poll_out after the
transmission was started(e.g. STM32) and others wait until
the transmission was completed before returning from poll_out
(e.g. NRF). While this has influence on the timeout, both types
are supported by this driver because the driver waits for a
configurable time period until it terminates the read.
The driver needs an appropriate open drain interface to be able
to communicate with slaves.
In the simpliest case this might be achived by configuring the mcu pins
in open-drain configuration with a (sufficiently small) pull-up to 3V3/5V.
Otherwise an external circuit needs to provide this interface.
Overdrive and Standard Speed modes are supported by this driver.
Signed-off-by: Thomas Stranger <thomas.stranger@outlook.com>
This commit introduces a new api for the net layer of Dallas
1-wire protocol.
For single drop configurations w1_read_rom, and w1_skip_rom commands are
provided.
For multidrop configurations w1_match_rom, w1_resume_command,
w1_search_rom, and w1_search_alarm routines are provided as well.
Additionally, the reset_select routine, conditionally depending on the
bus configuration, either executes a match_rom, or a skip rom command.
A w1_write_read command simplifies the typical scenario of addressing
a device, writing a few bytes to the device and reading back the answer.
Additionally w1_crc8, and w1_crc16 are added as wrappers around the
zephyr in-tree crc8 and crc16_reflect implementations.
The former may be used to verify the validity of the rom id, while the
latter is used for integrity checking of many eeprom, and authenticator
commands.
The general search command does not support filtering on
the family code.
Signed-off-by: Thomas Stranger <thomas.stranger@outlook.com>
This commit introduces a new api for the Dallas 1-wire protocol.
The api includes link functions for read and write operations on
bit, byte, and block level, as well as functions to reset and
lock the bus.
The bus configuration is derived from the device tree and can be
queried using w1_slave_count routine.
Signed-off-by: Thomas Stranger <thomas.stranger@outlook.com>
Sadik Ozer