esp-idf/components
2022-04-21 13:59:47 +00:00
..
app_trace clk_tree: added default clock source for peripheral 2022-04-14 15:44:56 +08:00
app_update G0: target component (components/esp32*) doesn't depend on driver anymore 2022-03-02 04:21:00 +00:00
asio mbedtls: Remove certs.c and certs.h from port directory 2022-03-15 17:16:07 +05:30
bootloader bootloader: use SOC capability macros for security features related configuration 2022-04-01 09:38:34 +00:00
bootloader_support refactor (docs, rng): Clarify RNG usage 2022-04-11 10:55:28 +08:00
bt Merge branch 'bugfix/sync_host_nocp_cmd' into 'master' 2022-04-18 21:54:10 +08:00
cmock Build & config: Remove leftover files from the unsupported "make" build system 2021-11-11 15:32:36 +01:00
console console: argtable3: sync arg_end argument name 2022-04-11 19:42:53 +02:00
cxx cxx: suppress -Warray-bounds warning for a test 2022-03-31 15:10:28 +07:00
driver Merge branch 'feature/default_clk_for_gptimer' into 'master' 2022-04-19 18:02:40 +08:00
efuse adc: unify adc_ll_num_t and adc_unit_t 2022-03-18 11:36:50 +08:00
esp32 G0: remove components/esp32* dependency on efuse component 2022-03-30 11:40:37 +08:00
esp32c2 G0: remove components/esp32* dependency on efuse component 2022-03-30 11:40:37 +08:00
esp32c3 Merge branch 'refactor/remove_esp32comp_dep_on_efuse' into 'master' 2022-03-31 17:40:25 +08:00
esp32h2 G0: remove components/esp32* dependency on efuse component 2022-03-30 11:40:37 +08:00
esp32s2 psram: support .bss on psram on esp32s3 2022-04-19 19:48:00 +08:00
esp32s3 G0: remove components/esp32* dependency on efuse component 2022-03-30 11:40:37 +08:00
esp_adc_cal adc: unify adc_ll_num_t and adc_unit_t 2022-03-18 11:36:50 +08:00
esp_common esp_common: rename EXT_RAM_ATTR to EXT_RAM_BSS_ATTR to make it clearer 2022-04-19 19:48:00 +08:00
esp_eth Merge branch 'feature/ksz8863rll_support' into 'master' 2022-04-14 10:51:27 +08:00
esp_event clk_tree: added default clock source for peripheral 2022-04-14 15:44:56 +08:00
esp_gdbstub Merge branch 'feature/gdbstub_rt_multicore' into 'master' 2022-03-17 19:59:29 +08:00
esp_hid freertos: Remove legacy data types 2022-02-09 23:05:45 +08:00
esp_http_client esp_http_client: Add comment for clearing location field in esp_http_client_prepare 2022-03-24 06:23:17 +00:00
esp_http_server esp_http_server: Minor updates in error messages 2022-03-09 14:43:10 +05:30
esp_https_ota Check FW version at start of ota for encrypted binary 2022-03-23 11:09:48 +05:30
esp_https_server https_server: Add provision for callback at session close 2022-03-30 11:25:11 +05:30
esp_hw_support Merge branch 'feature/support_bss_on_psram' into 'master' 2022-04-20 11:16:28 +08:00
esp_lcd lcd: spi lcd support transmit lsb first 2022-04-21 13:59:47 +00:00
esp_local_ctrl Build & config: Remove leftover files from the unsupported "make" build system 2021-11-11 15:32:36 +01:00
esp_netif Merge branch 'feature/ksz8863rll_support' into 'master' 2022-04-14 10:51:27 +08:00
esp_phy Update esp c3/s3 phy lib (aa05aec) 2022-04-19 20:18:05 +08:00
esp_pm clk_tree: added default clock source for peripheral 2022-04-14 15:44:56 +08:00
esp_ringbuf clk_tree: added default clock source for peripheral 2022-04-14 15:44:56 +08:00
esp_rom Merge branch 'refactor/gpio_unit_test' into 'master' 2022-04-01 18:38:19 +08:00
esp_serial_slave_link spi: support spi on h2 2022-03-29 11:54:08 +08:00
esp_system Merge branch 'feature/support_bss_on_psram' into 'master' 2022-04-20 11:16:28 +08:00
esp_timer clk_tree: prework of introducing clk subsystem control 2022-04-11 12:09:06 +08:00
esp_wifi clk_tree: prework of introducing clk subsystem control 2022-04-11 12:09:06 +08:00
esp-tls esp_tls: Remove deprecated API 2022-04-20 12:18:25 +05:30
espcoredump Merge branch 'bugfix/remove_ref_non_ex_options' into 'master' 2022-03-25 18:02:54 +08:00
esptool_py esptool_py: Update to support ESP32-S3 USB OTG compressed flashing with stub 2022-04-12 08:53:12 +00:00
fatfs change: renamed FATFS convenience mounting functions 2022-04-11 08:44:40 +00:00
freertos Merge branch 'feature/freertos_smp_port_local_storage' into 'master' 2022-04-19 19:52:29 +08:00
hal rmt: add more clock source caps 2022-04-21 13:59:47 +00:00
heap rmt: add more clock source caps 2022-04-21 13:59:47 +00:00
http_parser docs/en: Add entry for http_parser in copyrights page 2022-01-11 10:26:25 +05:30
idf_test test_rsa.c: remove 'use_blinding' variable. 2022-04-20 01:07:01 +00:00
ieee802154 openthread: Update OpenThread submodule 2022-03-07 15:45:16 +08:00
json Build & config: Remove leftover files from the unsupported "make" build system 2021-11-11 15:32:36 +01:00
linux linux: add dummy sys/lock.h implementation (single threaded only) 2022-01-24 18:51:40 +01:00
log log: support ESP_LOG_BUFFER* functions for Linux target 2022-04-11 13:29:01 +02:00
lwip esp_hw_support: move soc_memory_types.h helper functions into esp_hw_support 2022-04-08 11:46:10 +08:00
mbedtls test_rsa.c: remove 'use_blinding' variable. 2022-04-20 01:07:01 +00:00
mdns Merge branch 'bugfix/passing_cmake_cxx_std_option' into 'master' 2022-03-11 17:29:48 +08:00
mqtt components: correct printf() placeholder for time_t 2022-03-14 14:05:47 +07:00
newlib newlib: fix ESHUTDOWN and ENOTSOCK having the same numerical value 2022-04-18 12:10:30 +02:00
nvs_flash Merge branch 'bugfix/nvs_coverity_issues' into 'master' 2022-01-29 21:52:18 +00:00
openthread openthread: Update OpenThread submodule 2022-03-07 15:45:16 +08:00
partition_table change: misaligned partitions now raise an exception 2022-03-15 12:54:59 +01:00
perfmon perfmon: add SDPX headers 2022-02-07 08:02:13 +00:00
protobuf-c Build & config: Remove leftover files from the unsupported "make" build system 2021-11-11 15:32:36 +01:00
protocomm Merge branch 'bugfix/wifi_prov_mgr_conn_issue' into 'master' 2022-03-24 15:35:49 +05:30
pthread Remove IRAM_ATTR from any function declarations 2022-03-22 09:58:50 +00:00
riscv riscv: Use semihosting to set breakpoint and watchpoint when running under debugger 2022-02-24 08:55:40 +00:00
sdmmc sdmmc: Bugfix sdmmc_erase_sectors cmd38 argument validation 2022-04-11 15:36:45 +00:00
soc rmt: add more clock source caps 2022-04-21 13:59:47 +00:00
spi_flash spi_flash: move buffer check from hal layer to driver layer 2022-04-08 11:46:10 +08:00
spiffs spiffs: add esp_spiffs_gc function to force garbage collection 2022-04-11 11:19:10 +02:00
tcp_transport Merge branch 'feature/ws_client_support_cont_frames' into 'master' 2022-04-14 23:18:12 +08:00
tinyusb tinyusb: Allow dynamic configuration descriptor 2022-03-21 18:34:25 +01:00
touch_element esp_hw_support/esp_system: Re-evaluate header inclusions and include directories 2022-03-07 11:18:08 +05:30
ulp ulp: temporarily disable ULP support for S3 2022-03-25 14:19:12 +08:00
unity ci: add TEST_CASE_CI_IGNORE macro to allow pytest test cases to be ignored in ci 2022-03-30 15:11:08 +08:00
usb hw_support: move periph_ctrl from driver to hw_support 2022-03-29 11:53:31 +08:00
vfs clk_tree: added default clock source for peripheral 2022-04-14 15:44:56 +08:00
wear_levelling esp_hw_support/esp_system: Re-evaluate header inclusions and include directories 2022-03-07 11:18:08 +05:30
wifi_provisioning Merge branch 'bugfix/wifi_prov_mgr_conn_issue' into 'master' 2022-03-24 15:35:49 +05:30
wpa_supplicant Merge branch 'bugfix/do_not_allow_unauthenticated_encrypted_key_data' into 'master' 2022-04-20 16:32:45 +08:00
xtensa system: fix SET_STACK macro crashing in windowoverflow8 exception 2022-03-04 15:25:52 +08:00
README.md esp_hw_support/esp_system: Re-evaluate header inclusions and include directories 2022-03-07 11:18:08 +05:30

Core Components

Overview

This document contains details about what the core components are, what they contain, and how they are organized.

Organization

The core components are organized into two groups.

The first group (referred to as G0 from now on) contains hal, xtensa and riscv (referred to as arch components from now on), esp_rom, esp_common, and soc. This group contain information about and low-level access to underlying hardware; or in the case of esp_common, hardware-agnostic code and utilities. These components can depend on each other, but as much as possible have no dependencies outside the group. The reason for this is that, due to the nature of what these components contain, the likelihood is high that a lot of other components will require these. Ideally, then, the dependency relationship only goes one way. This makes it easier for these components, as a group, to be usable in another project. One can conceivably implement a competing SDK to ESP-IDF on top of these components.

The second group (referred to as G1 from now on) sits at a higher level than the first group. This group contains the components esp_hw_support, esp_system, newlib, spi_flash, freertos, log, and heap. Like the first group, circular dependencies within the group are allowed; and being at a higher level, dependency on the first group is allowed. These components represent software mechanisms essential to building other components.

Descriptions

The following is a short description of the components mentioned above.

G0 Components

hal

Contains the hardware abstraction layer and low-level operation implementations for the various peripherals. The low-level functions assign meaningful names to register-level manipulations; the hardware abstraction provide operations one level above this, grouping these low-level functions into routines that achieve a meaningful action or state of the peripheral.

Example:

  • spi_flash_ll_set_address is a low-level function part of the hardware abstraction spi_flash_hal_read_block

arch

Contains low-level architecture operations and definitions, including those for customizations (can be thought of on the same level as the low-level functions of hal). This can also contain files provided by the architecture vendor.

Example:

  • xt_set_exception_handler
  • riscv_global_interrupts_enable
  • ERI_PERFMON_MAX

esp_common

Contains hardware-agnostic definitions, constants, macros, utilities, 'pure' and/or algorithmic functions that is useable by all other components (that is, barring there being a more appropriate component to put them in).

Example:

  • BIT(nr) and other bit manipulation utilities in the future
  • IDF_DEPRECATED(REASON)
  • ESP_IDF_VERSION_MAJOR

soc

Contains description of the underlying hardware: register structure, addresses, pins, capabilities, etc.

Example:

  • DR_REG_DPORT_BASE
  • SOC_MCPWM_SUPPORTED
  • uart_dev_s

esp_rom

Contains headers, linker scripts, abstraction layer, patches, and other related files to ROM functions.

Example:

  • esp32.rom.eco3.ld
  • rom/aes.h

G1 Components

spi_flash

SPI flash device access implementation.

freertos

FreeRTOS port to targets supported by ESP-IDF.

log

Logging library.

heap

Heap implementation.

newlib

Some functions n the standard library are implemented here, especially those needing other G1 components.

Example:

  • malloc is implemented in terms of the component heap's functions
  • gettimeofday is implemented in terms of system time in esp_system

esp_system

Contains implementation of system services and controls system behavior. The implementations here may take hardware resources and/or decide on a hardware state needed for support of a system service/feature/mechanism. Currently, this encompasses the following, but not limited to:

  • Startup and initialization
  • Panic and debug
  • Reset and reset reason
  • Task and interrupt watchdogs

esp_hw_support

Contains implementations that provide hardware operations, arbitration, or resource sharing, especially those that is used in the system. Unlike esp_system, implementations here do not decide on a hardware state or takes hardware resource, acting merely as facilitator to hardware access. Currently, this encompasses the following, but not limited to:

  • Interrupt allocation
  • Sleep functions
  • Memory functions (external SPIRAM, async memory, etc.)
  • Clock and clock control
  • Random generation
  • CPU utilities
  • MAC settings

esp_hw_support vs esp_system

This section details list some implementations and the reason for placing it in either esp_hw_support or esp_system.

task_wdt.c (esp_system) vs intr_alloc.c (esp_hw_support)

The task watchdog fits the definition of taking and configuring hardware resources (wdt, interrupt) for implementation of a system service/mechanism.

This is in contrast with interrupt allocation that merely facilitates access to the underlying hardware for other implementations - drivers, user code, and even the task watchdog mentioned previously!

crosscore_int.c (esp_system)

The current implementation of crosscore interrupts is tightly coupled with a number of interrupt reasons associated with system services/mechanisms: REASON_YIELD (scheduler), REASON_FREQ_SWITCH (power management) REASON_PRINT_BACKTRACE (panic and debug).

However, if an implementation exists that makes it possible to register an arbitrary interrupt reason - a lower level inter-processor call if you will, then this implementation is a good candidate for esp_hw_support. The current implementation in esp_system can then just register the interrupt reasons mentioned above.

esp_mac.h, esp_chip_info.h, esp_random.h (esp_hw_support)

The functions in these headers used to be in esp_system.h, but have been split-off.

The remaining functions in esp_system.h are those that deal with system behavior, such as esp_register_shutdown_handler, or are proxy for other system components's APIs such as esp_get_free_heap_size.

The functions split-off from esp_system.h are much more hardware manipulation oriented such as: esp_read_mac, esp_random and esp_chip_info.