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
FreeRTOS: Fix cross-core event group sync
As above
Also includes fixes which allowed removing some semi-hacky bits from the event group unit tests - specifically, higher priority tasks will always be started immediately even if they run on the opposite core.
See merge request !535
FATFS enable support for multiple drives
Current implementation has drive numbers and paths hardcoded to support
only one FATFS drive. Arduino has it's own SPI driver to allow
compatibility and flexibility. With the MR it is possible to have up to
```_VOLUMES``` drives connected (SPI, SDMMC and others) at the same
time and accessed through VFS
See merge request !478
freertos kconfig: Add max task length name, move task stack overflow watchpoint
* Allow setting task name length via kconfig
* Move task stack overflow watchpoint out of internals debugging submenu, place next to other stack overflow checks.
* Thread local pointer feature should depend on Ethernet or WiFi
See merge request !531
Partition/SPI/OTA docs & OTA new functionality
* Update partition, SPI flash & OTA docs to reflect functionality changes
* Refactor OTA implementation to perform checks mentioned in API doc
* Add new functions to OTA API: esp_ota_get_running_partition() & esp_ota_get_next_update_partition() functions
* Add spi_flash_cache2phys() & spi_flash_phys2cache() functions to support esp_ota_get_running_partition()
See merge request !513
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
esp32: Fix hardware rng after esp_wifi_stop (second implementation)
Ensures hardware RNG remains enabled at all times.
Reworked version of !534
See merge request !536
Bugfix/fix some default lwip bool options
menuconfig options with bool type should use 'y/n' to set the default value, instead of '1/0'
See merge request !538
lwip: modify dhcp timer granularity from 60s to 1s
Current DHCP granularity is 60 seconds, it's not accurate, it can cause DHCP release/rebind/renew timer
timeout at the same time, also it may renew/rebind/release at wrong time, thus cause problem.
Do not disable clock for generating random number.
1. Do not disable clock for generating random number.
2. And fix the bug that system crashes if call esp_wifi_stop() twice.
See merge request !534
