build system: add IDF_VER environment variable and preprocessor define
This adds an `IDF_VER` preprocessor define which is obtained from `git describe`.
Looks like `v1.0-275-g0efaa4f` for non-release version or `v2.0` for a tagged (release) version.
See merge request !403
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 tcpip_adapter_set_hostname issue
The default hostname for each interface is "espressif", users can call this API to change each interface's hostname.
See merge request !284
examples/10_openssl_server: fixup SSL server with method of specific version
1. add method of any version supporting at OpenSSL and add API in header file
2. change OpenSSL server context method to be method of any version
Fixes http://esp32.com/viewtopic.php?f=14&t=696.
See merge request !369
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
build system: Fix sdkconfig.defaults file preventing menuconfig changes
'make defconfig' now behaves similarly whether sdkconfig.defaults
is present or not, and 'make menuconfig' doesn't trigger a defconfig.
See merge request !385
bootloader: export ets_update_cpu_frequency
MR !363 added linking librtc into bootloader. At the same time, MR !373 removed ets_update_cpu_frequency from ROM exports ld script, and replaced it with a dual CPU aware version. Combining these two MRs caused linker error in bootloader due to the unresolved `ets_update_cpu_frequency`.
One option to fix this is to move the definition of ets_update_cpu_frequency into bootloader_support component. This does however look a bit odd because this function is not something that is specifically needed for bootloader support.
Another option is to export the ROM version of ets_update_cpu_frequency for the bootloader only. This means that when bootloader changes CPU frequency, it only updates the tick period variable for PRO CPU. This isn't an issue though, because app startup code still calls the dual CPU aware version of ets_update_cpu_frequency early on, before any non-trivial code can run on the APP cpu.
This MR uses the second approach. Looking forward, we may move this definition of ets_update_cpu_frequency into the rtc_clk component, which will be used both by the bootloader and the app, and placing ets_update_cpu_frequency there would be logical.
See merge request !384
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
