Commit graph

4 commits

Author SHA1 Message Date
Pavel Hübner 83d031c024 drivers: w1: Make 1-Wire Skip ROM cmd. optional
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>
2023-05-19 16:29:35 +02:00
Carles Cufi 8e4d499fa0 treewide: Use CONFIG_*_ENDIAN instead of __BYTE_ORDER__
In order to avoid using multiple sources of truth for the platfom's
endianness, convert the in-tree code to use the (BIG|LITTLE)_ENDIAN
Kconfig variables exclusively, instead of the compiler's
__BYTE_ORDER__.

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
2022-10-28 19:23:46 +09:00
Tomislav Milkovic 0fe2c1fe90 everywhere: Fix legacy include paths
Any project with Kconfig option CONFIG_LEGACY_INCLUDE_PATH set to n
couldn't be built because some files were missing zephyr/ prefix in
includes
Re-run the migrate_includes.py script to fix all legacy include paths

Signed-off-by: Tomislav Milkovic <milkovic@byte-lab.com>
2022-07-18 16:16:47 +00:00
Thomas Stranger bb4f7b5a31 drivers: w1 introduce 1-wire net layer api
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>
2022-07-05 23:06:45 +02:00