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/Zephyr-latest/subsys/bindesc/
DKconfig2 # SPDX-License-Identifier: Apache-2.0
8 Binary Descriptors - constant data accessible outside of the executable image
28 Determines the maximum size of a binary descriptor's data. The theoretical
29 limit to this value is the maximum value of a uint16_t (65535), in practice
35 bool "Binary Descriptors Read"
37 Enable the app to read the binary descriptors of another image
42 module-str = Binary Descriptor read
46 bool "Bindesc read from RAM"
51 bool "Bindesc read from memory mapped flash"
56 bool "Bindesc read from flash"
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/Zephyr-latest/subsys/mgmt/mcumgr/grp/settings_mgmt/
DKconfig2 # SPDX-License-Identifier: Apache-2.0
26 Use a fixed size stack buffer, any user-supplied values longer than
44 int "Maximum setting name length"
47 Maximum length of a key to lookup, this will be the size of the
48 variable if placed on the stack or the maximum allocated size of the
52 int "Maximum setting value length"
55 Maximum length of a value to read, this will be the size of the
66 settings read or write attempt is made.
/Zephyr-latest/drivers/can/
DKconfig.mcp251xfd5 # SPDX-License-Identifier: Apache-2.0
19 int "Maximum number of queued messages"
49 int "Number of retries during SFR register read"
52 Number of retries during SFR register read if CRC fails.
55 int "Maximum number of concurrent active filters"
59 Maximum number of filters supported by the can_add_rx_callback() API call.
/Zephyr-latest/subsys/fs/
DKconfig3 # SPDX-License-Identifier: Apache-2.0
26 module-str = fs
38 int "Maximum number of distinct file system types allowed"
46 int "Optional override for maximum file name length"
47 default -1
49 Specify the maximum file name allowed across all enabled file
50 system types. Zero or a negative value selects the maximum
51 file name length for enabled in-tree file systems. This
52 default may be inappropriate when registering an out-of-tree
84 bool "File system shell read/write/erase test commands"
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DKconfig.littlefs4 # SPDX-License-Identifier: Apache-2.0
19 int "Maximum number of opened files"
22 This is a global maximum across all mounted littlefs filesystems.
25 int "Maximum number of opened directories"
28 This is a global maximum across all mounted littlefs filesystems.
31 int "Minimum size of a block read"
34 All read operations will be a multiple of this value.
47 needs a read cache, a program cache, and one additional cache
50 multiple of the read and program sizes of the underlying flash
67 is moved to another block. Set to a non-positive value to
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DKconfig.fatfs4 # SPDX-License-Identifier: Apache-2.0
19 bool "Read-only support for all volumes"
22 Select this when using FAT for read-only access to slightly
73 int "Maximum number of opened files"
78 FIL is defined in ff.h of ELM FAT driver, and is pre-allocated
79 at compile-time.
83 int "Maximum number of opened directories"
88 DIR is defined in ff.h of ELM FAT driver, and is pre-allocated
89 at compile-time.
131 Enable LFN with static working buffer on the BSS. Always NOT thread-safe.
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/Zephyr-latest/subsys/bluetooth/services/ots/
DKconfig3 # Copyright (c) 2020-2022 Nordic Semiconductor ASA
4 # SPDX-License-Identifier: Apache-2.0
29 The name of the Directory Listing Object when it is read by a client.
32 int "Maximum number of available OTS instances"
52 bool "Support OACP Read Operation"
85 hex "Maximum number of objects that each service instance can store"
87 # Given the maximum size of a directory listing record (172) and the maximum size of an
88 # object using the net_buf implementation is 2^16-1, the maximum number of objects is given
89 # by 2^16-1 / 172 = 381 == 0x17D)
91 # Max obj count is otherwise the non-RFU IDs available
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/Zephyr-latest/subsys/bluetooth/audio/
DKconfig.ascs1 # Bluetooth Audio - Audio Stream Control configuration options
6 # SPDX-License-Identifier: Apache-2.0
16 int "Maximum number of Audio Stream Endpoint Sink Characteristics"
24 int "Maximum number of Audio Stream Endpoint Source Characteristics"
43 meaning the number of ASEs that are allowed to be in a non-idle state at
57 int "Milliseconds of timeout when handle concurrent access to the long read ASE buffer"
61 The number of milliseconds that the ASCS implementation will maximum wait before rejecting
62 an ASE read or dropping a notification if the ASE state is being accessed by another
DKconfig.mcs1 # Bluetooth Audio - Media control configuration options
4 # Copyright (c) 2020-2022 Nordic Semiconductor
6 # SPDX-License-Identifier: Apache-2.0
35 Sets the maximum number of bytes (including the null termination) of
44 Sets the maximum number of bytes (including the null termination) of
53 Sets the maximum number of bytes (including the null termination) of
62 Sets the maximum number of bytes (including the null termination)
96 int "Maximum number of tracks segments in a track segment object"
100 Sets the maximum number of tracks segments in a track segment object.
105 int "Maximum number of records in a group object"
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DKconfig.bap1 # Bluetooth Audio - Basic Audio Profile configuration options
4 # Copyright (c) 2022-2023 Nordic Semiconductor ASA
6 # SPDX-License-Identifier: Apache-2.0
54 int "Maximum number of subgroups supported for the BASS receive states"
58 This option sets the maximum number of subgroups supported.
59 Due to limitations in advertising data, the maximum size of all subgroups are 249.
61 So effectively there can be a maximum of 24 subgroups in a BASE.
94 This option sets the maximum number of CIS per unicast group to support.
136 This option sets the maximum number of subgroups per broadcast source
155 This option sets the maximum number of streams per broadcast source
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/Zephyr-latest/subsys/mgmt/mcumgr/grp/fs_mgmt/
DKconfig2 # Copyright Nordic Semiconductor ASA 2020-2023. All rights reserved.
3 # SPDX-License-Identifier: Apache-2.0
10 # MCUMGR_GRP_FS_ -- general group options;
23 file system, including application-stored secrets like
33 prompt "Maximum file size that could be uploaded/downloaded"
36 Maximum file size that will be allowed to be downloaded from
71 By default file chunk, that will be read off storage and fit into
74 Enabling this option allows to set MAXIMUM value that will be
81 int "Maximum chunk size for file downloads"
85 Sets the MAXIMUM size of chunk which will be rounded down to
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/Zephyr-latest/subsys/bluetooth/common/
DKconfig5 # SPDX-License-Identifier: Apache-2.0
10 int "Maximum supported ACL size for outgoing data"
15 Maximum supported ACL size of data packets sent from the Host to the
21 In a Host-only build the Host will read the maximum ACL size supported
27 The Controller will return this value in the HCI LE Read Buffer
32 then this will restrict the maximum Link Layer transmission size.
42 Controller. This determines the maximum amount of data packets the
48 The Controller will return this value in the HCI LE Read Buffer Size
52 int "Maximum supported ACL size for incoming data"
62 Maximum support ACL size of data packets sent from the Controller to
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/Zephyr-latest/dts/bindings/i3c/
Dnuvoton,npcx-i3c.yaml2 # SPDX-License-Identifier: Apache-2.0
11 clock-frequency = <DT_FREQ_M(90)>; /* OFMCLK runs at 90MHz */
12 core-prescaler = <3>; /* CORE_CLK runs at 30MHz */
13 apb1-prescaler = <6>; /* APB1_CLK runs at 15MHz */
14 apb2-prescaler = <6>; /* APB2_CLK runs at 15MHz */
15 apb3-prescaler = <6>; /* APB3_CLK runs at 15MHz */
16 apb4-prescaler = <3>; /* APB4_CLK runs at 30MHz */
30 i3c-scl-hz = <12500000>;
31 i3c-od-scl-hz = <4170000>;
36 compatible: "nuvoton,npcx-i3c"
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/Zephyr-latest/subsys/mgmt/mcumgr/grp/stat_mgmt/
DKconfig2 # Copyright Nordic Semiconductor ASA 2020-2022. All rights reserved.
3 # SPDX-License-Identifier: Apache-2.0
10 # MCUMGR_GRP_STAT_ -- general group options;
26 int "Maximum stat group name length"
30 Limits the maximum stat group name length in MCUmgr requests, in bytes.
32 during handling of all stat read commands. If a stat group's name
35 For stat names s_name and snm_name, this is the maximum length when
39 module-str = mcumgr_grp_stat
/Zephyr-latest/lib/os/zvfs/
DKconfig4 # SPDX-License-Identifier: Apache-2.0
11 ZVFS is a central, Zephyr-native library that provides a common interoperable API for all
12 types of file descriptors such as those from the non-virtual FS, sockets, eventfds, FILE *'s
23 like read, write and poll.
28 int "Maximum number of ZVFS eventfd's"
32 The maximum number of supported event file descriptors.
51 Maximum number of entries supported for poll() call.
/Zephyr-latest/subsys/bluetooth/controller/
DKconfig3 # Copyright (c) 2016-2017 Nordic Semiconductor ASA
4 # SPDX-License-Identifier: Apache-2.0
142 bool "Software-based BLE Link Layer"
171 compliant with FIPS PUB 140-2.
177 A Controller implementation could also provide custom bare-metal
194 FIPS-197 compliant cryptographic implementations. In this case the
203 User-defined string that will be returned by the Zephyr VS Read Build
236 connection interval and 2M PHY, maximum 18 packets with L2CAP payload
246 controller. Number of required RX buffers would worst-case be
250 that the theoretical maximum. Default of 8 is for supporting
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/Zephyr-latest/drivers/sensor/honeywell/mpr/
Dmpr.h4 * SPDX-License-Identifier: Apache-2.0
21 /* MPR register read maximum retries */
26 /* MPR register read data conversion delay [ms] */
/Zephyr-latest/include/zephyr/sys/
Dspsc_pbuf.h4 * SPDX-License-Identifier: Apache-2.0
35 /** @brief Size of the field which stores maximum utilization. */
38 /** @brief Offset of the field which stores maximum utilization. */
56 /** @brief Maximum packet length. */
74 MAX(0, Z_SPSC_PBUF_DCACHE_LINE - (int)sizeof(struct spsc_pbuf_common))
97 * with read/write semantics on top of a memory region shared
125 return pb->common.len - sizeof(uint32_t); in spsc_pbuf_capacity()
159 * -EINVAL, if len == 0.
160 * -ENOMEM, if len is bigger than the buffer can fit.
189 * @retval non-negative Amount of space that got allocated. Can be equal or smaller than %p len.
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/Zephyr-latest/dts/bindings/espi/
Dnuvoton,npcx-espi-taf.yaml2 # SPDX-License-Identifier: Apache-2.0
10 compatible = "nuvoton,npcx-espi-taf";
13 mapped-addr = <0x68000000>;
14 max-read-sz = "NPCX_ESPI_TAF_MAX_READ_REQ_64B";
15 erase-sz = "NPCX_ESPI_TAF_ERASE_BLOCK_SIZE_4KB";
17 #address-cells = <1>;
18 #size-cells = <1>;
22 compatible: "nuvoton,npcx-espi-taf"
24 include: [espi-controller.yaml, pinctrl-device.yaml]
27 mapped-addr:
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/Zephyr-latest/include/zephyr/console/
Dconsole.h4 * SPDX-License-Identifier: Apache-2.0
27 * This function should be called once to initialize pull-style
30 * and incompatible with, callback (push-style) console handling
38 * @brief Read data from console.
40 * @param dummy ignored, present to follow read() prototype
41 * @param buf buffer to read data to
42 * @param size maximum number of bytes to read
43 * @return >0, number of actually read bytes (can be less than size param)
45 * <0, in case of error (e.g. -EAGAIN if timeout expired). errno
55 * @param size maximum number of bytes to write
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/Zephyr-latest/lib/os/
DKconfig2 # SPDX-License-Identifier: Apache-2.0
10 for any I/O object implementing POSIX I/O semantics (i.e. read/write +
14 int "Maximum number of open file descriptors"
19 Maximum number of open file descriptors, this includes
90 maximum of local and remote line size.
95 bool "Track maximum utilization"
97 When enabled, maximum utilization is tracked which can be used to
/Zephyr-latest/drivers/sensor/ntc_thermistor/
Dntc_thermistor.h4 * SPDX-License-Identifier: Apache-2.0
35 * @param[in] ohm Read resistance of NTC thermistor
42 * @brief Calculate the resistance read from NTC thermistor.
46 * @param[in] sample_value_max Maximum of `sample_value`
/Zephyr-latest/include/zephyr/drivers/
Dipm.h4 * @brief Generic low-level inter-processor mailbox communication API.
10 * SPDX-License-Identifier: Apache-2.0
37 * interrupt-safe APIS. Registration of callbacks is done via
44 * @param data Message data pointer. The correct amount of data to read out
60 * @brief Callback API to get maximum data size
68 * @brief Callback API to get the ID's maximum value
117 * event/semaphore, a high-level driver can implement that.
119 * There are constraints on how much data can be sent or the maximum value
125 * to the receiving side. The upper-level protocol dictates the amount of
126 * data read back.
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/Zephyr-latest/subsys/sd/
DKconfig2 # SPDX-License-Identifier: Apache-2.0
34 module-str = SD stack
41 Maximum time to wait, in milliseconds, for the SD card to initialize.
50 int "Number of times to retry SD OCR read"
53 Number of times to retry SD OCR read command. OCR reads typically
73 # If MMC is being used, need 512 bytes to read EXT_CSD
75 # If SDIO is being used, need 512 bytes to read FUNC0 CIS
77 # Otherwise, we only need 64 bytes to read SD switch function
/Zephyr-latest/tests/drivers/counter/counter_seconds/src/
Dmain.c3 * SPDX-License-Identifier: Apache-2.0
33 zassert_true(err == 0, "failed to read counter device"); in ZTEST()
38 zassert_true(err == 0, "failed to read counter device"); in ZTEST()
39 elapsed -= start; in ZTEST()
42 zassert_true(elapsed <= MAX_BOUND, "busted maximum bound"); in ZTEST()

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