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/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.fatfs4 # SPDX-License-Identifier: Apache-2.0
19 bool "Read-only support for all volumes"
21 Excludes write code from ELM FAT file system driver.
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.
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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
32 int "Maximum number of available OTS instances"
56 bool "Support OACP Write Operation"
67 bool "Support object name write"
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/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/drivers/flash/
DKconfig.nrf1 # SPDX-License-Identifier: Apache-2.0
66 This is maximum time, in ms, that NVMC will use to erase part
68 Minimal timeout is 2ms maximum should not exceed half of
78 to the flash erase and write operations timeout. The base for
90 bool "8-bit write block size emulation"
92 When this option is enabled writing chunks less than minimal write
DKconfig.nrf_rram4 # SPDX-License-Identifier: Apache-2.0
25 int "Internal write-buffer size"
30 Number of 128-bit words.
31 Maximum buffer size can be configured to the value of 32 (128-bit words).
32 Set 0 to disable write-buffer.
35 int "Preload timeout value for waiting for a next write in RRAMC clock cycles"
67 to the flash erase and write operations timeout. The base for
/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/disk/nvme/
Dnvme.h3 * SPDX-License-Identifier: Apache-2.0
36 uint8_t reserved3[3492]; /* 5Ch - DFFh */
41 uint32_t pmrswtp; /* Persistent Memory Region Sustained Write Throughput */
44 uint8_t reserved4[484]; /* E1Ch - FFFh */
52 /** Maximum Power */
56 /** Max Power Scale, Non-Operational State */
71 /** Relative Write Throughput */
74 /** Relative Write Latency */
98 /* bytes 0-255: controller capabilities and features */
121 /** multi-interface capabilities */
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DKconfig2 # SPDX-License-Identifier: Apache-2.0
11 driver to support these. It will enable MSI-X and MSI multi-vector
44 This sets the amount of possible retries per-request.
59 This sets the amount of pre-allocated PRP list. Each list
61 read or write data. Each PRP list is of page size be careful
65 int "Maximum namespace to allocate"
69 This sets the maximum namespace to allocate. Note that there may
77 Interrupt priority used for the MSI-X generated interrupts.
80 module-str = nvme
/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/samples/subsys/nvs/
DREADME.rst1 .. zephyr:code-sample:: nvs
2 :name: Non-Volatile Storage (NVS)
3 :relevant-api: nvs_high_level_api
11 module for non-volatile (flash) storage. In this application,
28 .. zephyr-app-commands::
29 :zephyr-app: samples/subsys/nvs
41 .. code-block:: console
43 ***** Booting Zephyr OS v1.12.0-rc1-176-gf091be783 *****
45 [fs/nvs] [DBG] _nvs_sector_init: f->write_location set to c
46 [fs/nvs] [INF] nvs_mount: maximum storage length 256 byte
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/Zephyr-latest/subsys/net/lib/lwm2m/
DKconfig2 # SPDX-License-Identifier: Apache-2.0
15 module-dep = LOG
16 module-str = Log level for LwM2M library
90 bool "Use path matching as fallback for cancel-observe"
93 implementations to implement cancel-observe by specifying the resource
95 this option, cancel-observe may not work properly when connecting to
140 According to LwM2M specification v1.0 and v1.1, non-core object versions other than 1.0
177 int "Default server ssid when using the lwm2m-client. (used for access control)"
189 int "LWM2M firmware server port non-secure"
213 Default maximum amount of time in seconds the client may wait
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/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()
150 * @brief Write specified amount of data to the packet buffer.
154 * @param pb A buffer to which to write.
159 * -EINVAL, if len == 0.
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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/include/zephyr/mgmt/mcumgr/grp/settings_mgmt/
Dsettings_mgmt_callbacks.h4 * SPDX-License-Identifier: Apache-2.0
33 * read/write/delete/load/save/commit request and to authorise or deny it. Access will be allowed
43 * access if needed (as long as it does not exceed the maximum setting string size) if
44 * CONFIG_MCUMGR_GRP_SETTINGS_BUFFER_TYPE_STACK is selected, of maximum size
/Zephyr-latest/dts/arm/st/h7/
Dstm32h745.dtsi4 * SPDX-License-Identifier: Apache-2.0
8 #include <zephyr/dt-bindings/display/panel.h>
12 compatible = "st,stm32h745", "st,stm32h7", "simple-bus";
14 flash-controller@52002000 {
16 compatible = "st,stm32-nv-flash", "soc-nv-flash";
17 write-block-size = <32>;
18 erase-block-size = <DT_SIZE_K(128)>;
19 /* maximum erase time for a 128K sector */
20 max-erase-time = <4000>;
23 compatible = "st,stm32-nv-flash", "soc-nv-flash";
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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
42 * @param size maximum number of bytes to read
45 * <0, in case of error (e.g. -EAGAIN if timeout expired). errno
51 * @brief Write data to console.
53 * @param dummy ignored, present to follow write() prototype
54 * @param buf buffer to write data to
55 * @param size maximum number of bytes to write
57 * <0, in case of error (e.g. -EAGAIN if timeout expired). errno
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/Zephyr-latest/lib/posix/options/
DKconfig.device_io3 # SPDX-License-Identifier: Apache-2.0
16 poll(), pread(), pselect(), pwrite(), read(), select(), and write().
44 When selected via Kconfig, Zephyr will provide an alias for write() as _write().
52 The maximum number of files that a process can have open at one time. This option is not
53 directly user-configurable but can be adjusted via CONFIG_ZVFS_OPEN_MAX.
/Zephyr-latest/include/zephyr/mgmt/mcumgr/grp/fs_mgmt/
Dfs_mgmt_callbacks.h5 * SPDX-License-Identifier: Apache-2.0
27 /** Access to write file (file download). */
39 * function is used to notify the application about a pending file read/write request and to
49 * redirect file access if needed (as long as it does not exceed the maximum path string
/Zephyr-latest/dts/bindings/fuel-gauge/
Dbattery-cutoff.yaml4 # SPDX-License-Identifier: Apache-2.0
9 Properties for fuel-gauges that may control battery cutoff, this is common in SBS-compliant or
17 battery-cutoff-support:
22 battery-cutoff-reg-addr:
26 battery-cutoff-payload:
28 Payload to write to cutoff battery register. This must be array of maximum 2 integers.
/Zephyr-latest/include/zephyr/sd/
Dsd_spec.h2 * Copyright 2022-2023 NXP
4 * SPDX-License-Identifier: Apache-2.0
69 * to inform the SD card the next command is an application-specific one.
87 /* Bits 0-2 reserved */
99 /* Bits 17-18 reserved */
184 #define SD_SPI_CMD_BODY_SIZE (SD_SPI_CMD_SIZE - 1)
271 /** VDD 2.7-2.8 */
273 /** VDD 2.8-2.9 */
275 /** VDD 2.9-3.0 */
277 /** VDD 3.0-3.1 */
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/Zephyr-latest/dts/bindings/ethernet/
Dsnps,dwcxgmac.yaml2 # SPDX - License - Identifier : Apache - 2.0
9 - name: reset-device.yaml
10 - name: ethernet-controller.yaml
17 max-frame-size:
21 Maximum ethernet frame size. The current ethernet frame sizes
23 means that normally xgmac will reject any frame above max-frame-size
27 max-speed:
30 - 10
31 - 100
32 - 1000
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/Zephyr-latest/dts/bindings/sdhc/
Dnxp,imx-usdhc.yaml2 # SPDX-License-Identifier: Apache-2.0
6 compatible: "nxp,imx-usdhc"
8 include: [sdhc.yaml, pinctrl-device.yaml]
14 data-timeout:
20 read-watermark:
26 write-watermark:
30 Number of words used as write watermark level in FIFO queue for USDHC
36 Max drive current in mA at 3.3V. A value of zero indicates no maximum
41 pwr-gpios:
42 type: phandle-array
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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
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
141 int "Predicted maximum number of types to return on supported list"
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/Zephyr-latest/tests/bluetooth/mesh/blob_io_flash/src/
Dmain.c4 * SPDX-License-Identifier: Apache-2.0
26 if ((chunk_idx == block->chunk_count - 1) && in chunk_size()
27 (block->size % CHUNK_SIZE)) { in chunk_size()
28 return block->size % CHUNK_SIZE; in chunk_size()
96 /* Simulate reading whole partition divided into blocks and chunk of maximum sizes */ in ZTEST()
109 /* `block_start` in write mode will erase flash pages that can fit block. in ZTEST()
132 remaining -= chunk.size; in ZTEST()
146 chunk.offset--; in ZTEST()
151 block.offset--; in ZTEST()
168 /* 3 is maximum length of padding at the end of written chunk */ in ZTEST()
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