esp32: update wifi lib for limitting dynamic wifi buffer
Add limit for all dynamic wifi ebuf to avoid wifi run out of memory in some extreme scanrio.
The default max allocated dynamic tx buffer is 32
The default max allocated dynamic rx buffer is 64, make default value is bigger because when all packets we received are small packets, e.g. the length is 64Bytes, then 64K can hold 1000 packets, so 64 maybe a good candidate default value, anyway the customer can configure it via menuconfig.
The default dynamic wifi internal long/long-long mgmt is 32, generally 32 is enough for mgmt packet (beacon/auth/assoc/probe/null etc). Generally when all the 32 mgmt buffer is run out of memory, it means internal wifi state machine may has problem, we need to debug it.
See merge request !683
There are some RODATAs of libphy.a that are called in ISR. So need
to put them into DRAM to avoid access them when R/W SPI flash. Due
to the RODATAs which are called in ISR haven't been picked out to
put into DRAM, put all of the RODATA of libphy.a into DRAM. This
will be optimized in the future.
Base MAC address can be stored in default manufacture-defined or customer
pre-defined place in EFUSE and other place e.g. flash or EEPROM.
If choose to use base MAC address which is stored in other place, please
call esp_base_mac_addr_set_external() before initializing WiFi/BT/Ehternet.
Remove ESP_EARLY_LOGI before bss is initialized; it crashes the CPU
There's an ESP_EARLY_LOGI line that can get called before the BSS is initialized; the early logging code doesn't cope well with that: it checks if FreeRTOS is up, but the variables it uses for that contains garbage because it isn't cleared yet, giving the wrong result. The logging code then tries to set a mux, crashing the entire system. This patch removes the log line and adds a warning at the BSS initialization line not to do anything complex before that point.
Fixes https://github.com/espressif/esp-idf/issues/523
See merge request !671
- Implements application tracing module which allows to send arbitrary
data to host over JTAG. This feature is useful for analyzing
program modules behavior, dumping run-time application data etc.
- Implements printf-like logging functions on top of apptrace module.
This feature is a kind of semihosted printf functionality with lower
overhead and impact on system behaviour as compared to standard printf.
Detect invalid cache access
This MR adds always-on feature which detects cache invalid access and triggers panic handler when invalid access interrupt is raised.
See merge request !660
Confusion here is that original ROM has two functions:
* SPIReadModeCnfig() - sets mode, calls enable_qio_mode/disable_qio_mode
* SPIMasterReadModeCnfig() - As above, but doesn't set QIO mode in status register
However we never want to use the ROM method to set/clear QIO mode flag, as not all flash chips work this way. Instead we
do it in flash_qio_mode.c in bootloader.
So in both cases (ROM or "patched ROM") we now call SPIMasterReadModeCnfig(), which is now named
esp_rom_spiflash_config_readmode().
Introduce soc component, add source of rtc_clk and rtc_pm libraries
This MR adds parts of the RTC library source code (initialization, clock selection functions, sleep functions). WiFi-related power management functions are kept inside the precompiled library. Most of RTC library APIs have been renamed.
Default CPU frequency option in Kconfig is set to 160MHz, pending qualification of 240MHz mode at high temperatures.
Register header files are moved into the new soc component, which will contain chip-specific header files and low-level non-RTOS-aware APIs (such as rtc_ APIs). Some of the files from ESP32 component were also moved: cpu_util.c, brownout.c, and the corresponding header files. Further refactoring of ESP32 component into more meaningful layers (chip-specific low level functions; chip-specific RTOS aware functions; framework-specific RTOS-related functions) will be done in future MRs.
See merge request !633
1) fixed SPI_read_status: added check for flash busy flag in matrix mode
2) fixed SPI_page_program: enable write before writing data to SPI FIFO
3) SPI flash ROM funcs replacement is controlled via menuconfig option
esp32: initialize cross-core interrupt in single core mode
The software interrupt originally used as the cross-core interrupt is
now also used to yield from a FreeRTOS critical section; therefore it
must be initialized for single core mode as well.
Fixes https://github.com/espressif/esp-idf/issues/496
See merge request !640
fix warnings generated by ESP_ERROR_CHECK(variable) in release builds
This uses the same pattern as “assert” in release builds to silence the
warning. At the same time, we make sure that if a statement is wrapped
into ESP_ERROR_CHECK, it is executed in release build as well.
Fixes https://github.com/espressif/esp-idf/issues/497
See merge request !641
This uses the same pattern as “assert” in release builds to silence the
warning. At the same time, we make sure that if a statement is wrapped
into ESP_ERROR_CHECK, it is executed in release build as well.
The software interrupt originally used as the cross-core interrupt is
now also used to yield from a FreeRTOS critical section; therefore it
must be initialized for single core mode as well.
Fixes https://github.com/espressif/esp-idf/issues/496
If static tx buffer is selected, WiFi tx buffers are allocated when WiFi is initialized and released
when WiFi is de-initialized. If dynamic tx buffer is selected, WiFi tx buffer is allocated when tx
data is delivered from LWIP to WiFi and released when tx data is sent out by WiFi.
The size of each static tx buffers is fixed to about 1.6KB and the size of dynamic tx buffers is
depend on the length of the data delivered from LWIP.
If PSRAM is enabled, "STATIC" should be selected to guarantee enough WiFi tx buffers.
If PSRAM is disabled, "DYNAMIC" should be selected to improve the utilization of RAM.
ULP coprocessor toolchain integration
- build system support for ULP coprocessor toolchain
- documentation for ULP coprocessor instruction set
- documentation for ULP code execution flow, loading programs, exchanging data
- example: counting pulses using ULP
See merge request !394
Reset WIFI mac when wifi start and update wifi lib
1. reset wifi mac when wifi start
2. roll back rx hung workaround for beacon timeout
3. fix amsdu ap interface wrong issue
4. fix amsdu header parse error
5. fix amsdu flag wrong issue
6. PHY: V350, fix BT rssi bug
7. RTC: V225, fix bt will be not work when wifi is reset
See merge request !606
SPI flash operations lock for shorter periods
Based on bug report here:
https://esp32.com/viewtopic.php?f=13&t=1489&p=6816#p6773
Long SPI flash erase (and possibly write/read) cycles block all tasks on both CPUs for an extended period, and can lead to WiFi dissassociation (and general priority inversion.)
This MR inserts preemption breaks into large operations (all erases, writes every 8KB, reads every 16KB).
Overhead of a single spi_flash_guart_start()/spi_flash_guard_end() cycle measured at approx 67us (assuming no preemption.)
See merge request !600
Error handling in NVS initialization
Previously nvs_flash_init worked under an assumption that there should always be at least one free page available. This is true during normal operation, but in some cases (such as when changing application partition table from a non-OTA to an OTA one), NVS partition may get truncated, which will cause empty pages to be lost.
This MR adds error checks for this condition, and updates code which calls `nvs_flash_init` to check for the return code.
For most examples, a simple `ESP_ERROR_CHECK` is added around `nvs_flash_init`. For NVS examples and the OTA example, more robust error handling is added.
This change also removes nvs_flash_init calls from examples which don't use NVS.
See merge request !582
idf_monitor: Small fixes (baud rate, EOL, /dev/tty.X on macOS, Ctrl-T on failure)
* "make monitor" now passed the configured baud rate.
Closes#436https://github.com/espressif/esp-idf/issues/436
* Pass toolchain prefix from sdkconfig into monitor tool
* Allow setting EOL in idf_monitor.py, use CRLF by default
* Detect if /dev/tty.X is used on macOS, warn and replace with /dev/cu.X
* If a build fails or gdb exits, ignore Ctrl-T (allowing Ctrl-T Ctrl-A/F to be same key sequence everywhere)
* Add a note about winpty on Windows.
Ref 02fdf8271d (commitcomment-21369196)
* Fix problems with Console.cancel() not existing in older pyserial
* Print more user-friendly symbols for "start of iram" and "start of flash"
See merge request !594
1. reset wifi mac when wifi start
2. roll back rx hung workaround for beacon timeout
3. fix amsdu ap interface wrong issue
4. fix amsdu header parse error
5. fix amsdu flag wrong issue
6. PHY: V350, fix BT rssi bug
7. RTC: V225, fix bt will be not work when wifi is reset
This is to avoid confusion when idf_monitor prints the first symbol in each section, ie "WindowOverflow4" or similar,
when bootloader prints the section mapping address.
Closes#447https://github.com/espressif/esp-idf/issues/447
1. Add low speed channels for LEDC module.
2. Improve fade object allocate mechanism.
3. Improve ledc example, add 2 low speed channels in example.
4. Remove debug code
5. Improve the register bit field name of slow clock.
1. add options to disable nvs
2. add station keepalive with softap
3. fix beacon rx start time not accurate issue
4. set wifi rx desc/buffer boundary check to internal memory boundary
add wakeup from touch sensor, and deep sleep example
- add new deep sleep wakeup mode
- change documentation to explain incompatibilities between different wakeup mode, add error checks
- add new ULP instructions necessary for ULP wakeup scenario
- fix issues with I_WR_REG, I_SLEEP, I_END instructions
- add deep sleep example, illustrating the use of timer, gpio, touch, and ULP wakeup triggers
See merge request !461
component/bt: optimize stack size of Bluetooth Tasks and make them be configurab…
Bluetooth tasks' stack size are optimized and can be configured by the CONFIG_NEWLIB_NANO_FORMAT option.
See merge request !559
Allow separate ethernet & wifi configuration
If only 1/2 of ethernet & WiFi are enabled in config, the other interface is no longer linked into the firmware.
* Fixes bug where enabling Ethernet but not WiFi would fail to compile.
* Also means that enabling WiFi but not Ethernet no longer links some unused ethernet interface functions.
See merge request !525
Feature/add user set mac
1. Add menuconfig for user to set mac address of wifi, bt and ethernet.
2. Add the number of MAC address generated from efuse for user to choose.
3. Add MAC address derive method.
See merge request !542
1. RTC V214: modify APLL function for the chip of ECO version.
2. Add API phy_close_rf() and use it in esp_phy_deinit() instead of pm_close_rf().
3. RTC V213: fix BT will not work when BT-init is called more than once.
Optimize or release memory in bluetooth
1. add option to release about 30K from BT if BLE only
2. later BT/BLE will be separated by BT/BLE macro, but this option should use when user make sure that in BLE only mode.
See merge request !520
This change adds esp_deep_sleep_get_wakeup_cause, which returns the
source which has caused wakeup from deep sleep.
Similar to esp_deep_sleep_get_ext1_wakeup_status, a function is added
to check touch pad wakeup status: esp_deep_sleep_get_touchpad_wakeup_status.
This function returns the touch pad which has caused wakeup.
ULP and touch FSMs in ESP32 revisions 0 and 1 do not operate correctly
if RTC_PERIPH power domain is force powered on (ESP_PD_OPTION_ON).
Both ULP and touch still work, but clock frequency of the ULP may be
incorrect and touch values may be off by considerable amount. As such,
when these wakeup modes are used, RTC_PERIPH power domain has to be set
to ESP_PD_OPTION_AUTO (or, in the current implementation,
ESP_PD_OPTION_OFF — though this will change in the future when _OFF will
actually *force* the power domain to be powered off).
Because EXT0 wakeup source requires RTC_PERIPH to be powered ON, mark
ULP and touch wakeup sources as incompatible with EXT0. Workaround for
this is to use EXT1 wakeup source instead, which offers similar or
better functions without having to keep RTC_PERIPH powered on.
In case WiFi/BT stack has been enabled but wasn’t disabled, some RTC
bits may be left enabled, causing increased current consumption.
This change returns some of the bits back to their default values.
1. add new APIs bt controller enable/disab/deinit
2. make bt controller work need to call two APIs of esp_bt_controller_init and enable
3. modify phy init to make mac reset once
1. add a macro in menuconfig for users to choose whether store phy calibration data into NVS or not.
2. rename some disable phy and rf APIs so that existing code which calls old APIS will fail to compile.
1. Add disable PHY and RF when WiFi and BT are both disabled(including call sniffer disable API).
2. Do not init PHY and RF when cpu start. Init PHY and RF when call Wifi or BT start APIs(including sniffer enable API).
3. Add a temporary lib: librtc_clk.a and will delete it when CPU frequency switching function is done.
4. Add an function to get OS tick rate.
5. Do not put the whole pp.a in iram0, only put lmac.o, ieee80211_misc.o, ets_time.o and wdev.o in iram0.
phy_init: don’t rewrite valid calibration data
In the default PHY init routine, calibration data is loaded from NVS.
Most of the time the incremental changes to calibration will be fairly
small, so we don’t need to rewrite the existing calibration data stored
in the NVS.
Possible enhancement to be done in the future: expose a function in PHY
library to tell how big was the change in calibration data. If the
change was significant, then calibration data stored in NVS should be
updated.
See merge request !487
1. Reduce the default static rx buffer size from 25 to 10
2. Adjust ampdu interrupt size to 3, namely, raise 1 interrupt per 3-mpdu
3. Make a copy for all received packets, including AMSDU/AMPDU/MPDU
4. Fix softap mis-forward issue
5. Fix pp q full issue
6. Fix sniffer copy wrong content issue
In the default PHY init routine, calibration data is loaded from NVS.
Most of the time the incremental changes to calibration will be fairly
small, so we don’t need to rewrite the existing calibration data stored
in the NVS.
Possible enhancement to be done in the future: expose a function in PHY
library to tell how big was the change in calibration data. If the
change was significant, then calibration data stored in NVS should be
updated.
esp32: Fixes watchdog problem when printing core dump to uart
1) Fixes watchdog problem when printing core dump to uart
2) Also fixes generation of core dumps when flash cache is disabled
See merge request !472
1. fix ampdu<->mpdu<->ampdu switch may cause rx slow issue by put mpdu into ampdu reorder queue
2. fix each ac first sending always fail issue by adding retry
1. modify the discover retry backoff time from (2,4,8,16,32,60,60)s to (500m,1,2,4,8,15,15)s.
2. add DHCP_DOES_ARP_CHECK to menuconfig for users to specify if do a ARP check on the offered address.
If enable, one more second will be taken in obtaining IP address.
3. update wifi libs
Move PHY options out of WiFi config, improve descriptions
- move PHY-related settings into new menu, make it dependent on WIFI_ENABLED || BT_ENABLED
- improve descriptions of Ethernet Kconfig options
See merge request !443
ESP32_PHY_MAX_TX_POWER option is only meaningful for WiFi, so previous
change made it depend on WIFI_ENABLED. However if WiFi is not enabled,
but BT is, this option becomes undefined which breaks phy_init_data
generation.
This change turns ESP32_PHY_MAX_TX_POWER into a hidden parameter, which
depends on PHY_ENABLED. New user-visible parameter,
ESP32_PHY_MAX_WIFI_TX_POWER is introduced which depends on WIFI_ENABLED
and is used as default value for ESP32_PHY_MAX_TX_POWER if WIFI_ENABLED
is set. Otherwise ESP32_PHY_MAX_WIFI_TX_POWER is set to 20.
fixes for issues observed when using spi_flash
This MR fixes three unrelated issues:
- Race condition in spi_flash_enable_interrupts_caches_and_other_cpu
when operations on unpinned tasks are performed.
The issue is reported in https://github.com/espressif/esp-idf/pull/258
- esp_intr_noniram_disable doesn’t disable interrupts when compiled in
release mode. This issue manifested itself with an illegal instruction
exception when task WDT ISR was called at the time when flash was
disabled.
Fixes https://github.com/espressif/esp-idf/issues/263.
- Tick hooks on CPU1 were not called if CPU0 scheduler was disabled for
significant amount of time (which could happen when doing flash erase).
The issue manifested itself as “INT WDT timeout on core 1” error.
Fixes https://github.com/espressif/esp-idf/issues/219.
See merge request !441
When compiling in release mode, compiler was choosing same register for
oldint and intmask variables, so INTENABLE was never modified.
This effectively broke disabling of non-IRAM interrupts during flash
operations, observed in the existing tests if task watchdog is enabled.
This change adds an extra constraint tells the compiler that output
operand should not be placed into the same register as an input one.
Delete option to select core timer 2 as a FreeRTOS tick source
Core timer 2 is unusable for FreeRTOS ticks because it triggers a high-level interrupt. This MR deletes the option to select it.
Ref https://github.com/espressif/esp-idf/issues/234
See merge request !418
update wifi lib: fix some wifi lib bugs
1. net80211: fix get ap info error(a4614877)
2. tw9358: sta mac same with softap(ea38d32c)
3. tw9221: scan channel error when connected(183d469c)
See merge request !425
fixes for github issues
This MR includes commits from several Github PRs, as well some fixes for issues reported on Github and on the forum.
- compile PHY-related code only when WiFi is enabled
- fix macOS setup instructions
- fix some of the Sphinx warnings
- update docs index, improve structure of the readme-
- wifi: fix typos, rename ESP_ERR_WIFI_NOT_START to ESP_ERR_WIFI_NOT_STARTED
- sdmmc: fix explanation of flash voltage regulator configuration efuses
- sdmmc: change idx num of example
- fix i2c_get_period name
- fix esp_log_level_set function name in docs
See merge request !420
If using WIFI_INIT_CONFIG_DEFAULT, error message will point out lack
of WiFi. Otherwise linker errors on WiFi symbols should help give a
clue as to what is broken.
Piggy-backs on changes in !420, ref github #230#237
esp32 core dump to flash
1. menuconfig option to select where to store core dump: flash, uart or disable
2. Saving of core dump to flash
3. Partition table definitions files with core dump partition
4. Python scripts to support core dump generation from GDB command line
See merge request !341
The following issues mentioned during MR!341 review were fixed:
1) Core dump test application description
2) Usage of CONFIG_ESP32_ENABLE_COREDUMP_TO_FLASH and CONFIG_ESP32_ENABLE_COREDUMP_TO_UART
3) FLASH_GUARD_START macro usage is fixed in flash API
4) Core dump module logging facility
5) cache util functions doc updated
6) interactive delay before print core dump to uart
7) core dump partion support in build system
Deep sleep stub may call ets_update_cpu_frequency, which has been moved from ROM to IRAM.
Restore the ROM version in the linker script, call it ets_update_cpu_frequency_rom, use it in the deep sleep stub.
1) PS is fixed up to allow GDB backtrace to work properly
2) MR!341 discussion: in core dump module: esp_panicPutXXX was replaced by ets_printf.
3) MR!341 discussion: core dump flash magic number was changed.
4) MR!341 discussion: SPI flash access API was redesigned to allow flexible critical section management.
5) test app for core dump feature was added
6) fixed base64 file reading issues on Windows platform
7) now raw bin core file is deleted upon core loader failure by epscoredump.py
Complimentary changes:
1) Partition table definitions files with core dump partition
2) Special sub-type for core dump partition
3) Special version of spi_flash_xxx
4) espcoredump.py is script to get core dump from flash and print useful info
5) FreeRTOS API was extended to get tasks snapshots
Clean up WiFi & Bluetooth config options
* Splits "WiFi" configuration out from ESP32 configuration submenu to its own menu.
* Renames "BT" to "Bluetooth", enabling Bluetooth is now in this option not the ESP32 submenu.
* Also disables compiling/linking of BT stack if Bluetooth is disabled, saves some build time.
See merge request !397
add wpa2 set id api and modify null data tx description
1. wpa2: add wpa2 set id api
2. low rate: modify null data tx description
See merge request !402
ethernet: support flow control
(1) Only fullduplex mode support flow ctrl .
(2) Fix reboot exception which caused by not-reset EMAC hardware (such as DMA) when reset CPU.
See merge request !392
Add option to automatically set a watchpoint at the end of the swapped-in task
This should make stack overflows easier to debug because it triggers a debug exception as soon as the stack is overwritten, not later when a context switch happens. Marked as a FreeRTOS debug feature because it doesn't give a nice error message and uses up a watchpoint.
See merge request !389
Fix OpenOCD detection code
In the current master, detection of an attached OCD is broken. This fixes it.
I also snuck in two unrelated checks in intr_alloc which return from a function that is asserted earlier in the code. This makes the code behave better when they are called erroneously in a production build.
See merge request !377
SDMMC peripheral driver, SD protocol driver, FATFS library, VFS integration
This MR contains:
- SDMMC host peripheral driver
- SD protocol driver in sdmmc component (can be extended to support MMC/eMMC and SPI based hosts)
- ChaN's FATFS library v0.12b
- VFS integration
- FAT access via VFS is thread-safe (unless same file is read/written/unlinked/renamed from different tasks)
- Support for POSIX directory-related functions in VFS (and in vfs_fatfs.c)
- unit test for the above
- Example
- API documentation
Will be done in other MRs:
- Support for spi_flash IO driver for FatFs
- SPI host driver and support for SPI mode commands in sdmmc component
- MMC/eMMC support in sdmmc component
- Support for slightly higher 53/26.6MHz clocks (currently I'm using 20MHz for DS and 40MHz for HS, instead of 25MHz/50MHz per standard), and arbitrary low clocks (e.g. 4MHz).
See merge request !353
C++ support
This change adds necessary support for compiling C++ programs:
- linking against libstdc++
- implementation of static initialization guards using FreeRTOS primitives: since we don't have condition variables at our disposal, and we don't want to allocate a synchronization primitive for every guard variable generated by the compiler, we imitate condition variables using a combination of a mutex, counting semaphore, and a counter (based on [Microsoft Research paper](https://www.microsoft.com/en-us/research/wp-content/uploads/2004/12/ImplementingCVs.pdf), albeit because we don't need *arbitrary* code to use these CVs, implementation gets simpler).
Note that libstdc++ also contains an implementation of `__cxa_guard_{acquire,release,abort}` functions. These implementations come from an `#ifndef GXX_THREADS` branch, i.e. are not aware of multthreading. There are three ways of replacing these libstdc++ functions with our implementation:
1. Move our code into gcc. Pros: cleanest solution. Cons: Such changes are unlikely to be merged by any upstream, so we end up maintaining our own forks of {gcc,crosstool-ng}.
2. Use library as it is built by crosstool, use `ar` to delete one object file (`guards.o`), add this library to ESP-IDF. Pros: easy to implement. Cons: libstdc++ is a 15MB binary 😯
3. Keep using libstdc++ from crosstool, force our implementation to be linked using a `-u` linker flag. Pros: no impact on repo size, easy to implement. Cons: somewhat less clean than 1 (and about as hacky as 2).
For the reasons mentioned, option (3) looks like the best tradeoff.
Ref. TW6702
See merge request !364
Enable bootloader entropy source for RNG
Enables an entropy source when bootloader starts up, which both seeds the RNG for use before WiFi/BT stack is enabled and provides an adequate RNG for secure boot & flash encryption key generation.
A prerequisite was enabling 80MHz operation, so the CPU is now set to 80MHz as soon as second stage bootloader starts running.
See merge request !363
esp32: ets_update_cpu_frequency should set tick scale for both CPUs
ets_update_cpu_frequency ROM function updates g_ticks_per_us, which is has two copies, one for each CPU.
The APP CPU copy of g_ticks_per_us never got updated, resulting in shorter delays produced by ets_delay_us on the APP CPU.
This MR replaces ROM ets_update_cpu_frequency with a copy in IRAM which updates scaling factors on both of the CPUs.
So now we get expected delays (in microseconds):
```
ets_delay_us core=0 expected=50000 actual=50014
ets_delay_us core=1 expected=50000 actual=50015
vTaskDelay core=0 expected=50000 actual=49428
vTaskDelay core=1 expected=50000 actual=50000
```
Reported on the forum: http://esp32.com/viewtopic.php?f=2&t=713#p3722
See merge request !373
SPI master driver
This merge requests adds an SPI Master driver. This driver is (of course) multithread capable, has device abstraction, has command queueing, DMA support and all other sorts of nice things you'd expect from a SPI driver.
See merge request !332
modify bootloader dram start address, swap app bss and data segments
Modify bootloader dram_seg from address 0x3ffc0000 to 0x3fff0000, len from 0x20000 to 0x10000.
Also put app .data before .bss, to reduce the chance .data collides with ROM bootloader stack.
See merge request !375
This change reduces chances that a large .bss segment will push .data all the way into
0x3ffe1320 — 0x3ffe5320 range where the bootloader stack is, creating a problem when
bootloader will be loading application into memory.
With this change, .data would need to be at least 200k big to cause problems.
1. Update wifi lib which contains ampdu and other optimizations
2. Add throughput code debug code
3. Other misc modification about throughput optimization
2. update example comments and other minor changes
3. rename API: i2c_cmd_link_create/i2c_cmd_link_delete (+4 squashed commits)
Squashed commits:
[2e0ac3e] 1. coding style: add one space after condition key words.
2. modify i2c.h, use gpio_num_t instead of int, improve comments of return values
3. add i2c index in index.rst
4. add readme for i2c example
[4991d92] update i2c.doc
[88b672e] driver: i2c
1. add mux and spin lock to run in a thread-safe way.
2. modify example code
[4eb15fe] driver: i2c code
1. add i2c master code
2. add i2c slave code
3. add i2c example code
4. add DRAM_ATTR for I2C array
Minor fixes from various sources
- Fix memory debugging code. Noticed by Tuan.
- intr_enable/disable should be in IRAM. Noticed by rojer
- Still old timer code in examples in doxygen comments. Noticed on the forum by jumjum123
- Timer example was broken. Noticed on the forum by jumjum123
See merge request !325
1. add sigma-delta code and example.
2. add gpio output signal in io matrix.
Squashed commits:
[a25e7d4] minor changes for doc
[6a03a1e] minor changes on comments and doc.
[97dd9e4] Add doc.
update index.rst
change example index
This change allows setting pin configuration for EXT1 wakeup depending on the state of RTC_PERIPH power domain:
- if peripherals are enabled (due to another wakeup mode, or due to esp_deep_sleep_pd_config call), we can keep internal pullups/pulldowns enabled
- if peripherals are disabled, pullups and pulldowns need to be disabled as well
Also add comments about the purpose of registers being configured.
This adds a workaround for a bug that following deep sleep wakeup, ISO (bus isolation) signal may be set for RTC fast memory.
We set FORCE_NOISO bit in RTC_CNTL_PWC_REG until we find out what is causing ISO signal to be set.
When ESP32 wakes up from deep sleep, flash is accessed an approximately 900us after power on.
Some flash chips need more time to become ready. This change adds a menuconfig option to add
some delay to the default deep sleep wake stub.
Fixes https://github.com/espressif/esp-idf/issues/117
This adds the following APIs to enable various wakeup sources:
- esp_deep_sleep_enable_timer_wakeup
- esp_deep_sleep_enable_ulp_wakeup
- esp_deep_sleep_enable_ext0_wakeup
- esp_deep_sleep_enable_ext1_wakeup
And an API to start deep sleep:
- esp_deep_sleep_start
1. TW8657, WIFI send the whole packet to smartconfig;
2. modify API annotation of smartconfig and sniffer;
3. export smartconfig APIs to programming guide;
