the variable "IDF_TARGET" is only used under a if clause
"if(ULP_C0CPU_IS_RISCV)". while building a non-riscv target,
there will be a cmake warning:
CMake Warning:
Manually-specified variables were not used by the project:
IDF_TARGET
This updates the minimal supported version of CMake to 3.16, which in turn enables us to use more CMake features and have a cleaner build system.
This is the version that provides most new features and also the one we use in our latest docker image for CI.
This commit enables ULP FSM support for esp32s3 and updates ULP FSM code
flow for other chips.
It adds C Macro support for the ULP FSM instruction set on esp32s2 and
esp32s3.
The unit tests are also updated to test ULP FSM on ep32s2 and esp32s3.
This commit refactors the ulp component.
Files are now divided based on type of ulp, viz., fsm or risc-v.
Files common to both are maintained in the ulp_common folder.
This commit also adds menuconfig options for ULP within the ulp
component instead of presenting target specific configuations for ulp.
riscv32-esp-elf toolchain (used for ESP32-C3) can also be used for
ESP32-S2 RISC-V ULP coprocessor.
This removes the riscv-none-embed-gcc toolchain which was originally
used for the ULP, and updates the docs and CMake files to use
riscv32-esp-elf.
Some flags are cleaned up and workarounds removed from CMake toolchain
file.
A problem if the Python interpreter used for idf.py (or set via PYTHON
variable) didn't match
"/usr/bin/env python" (or the associated executable for .py files, on
Windows).
Closes https://github.com/espressif/esp-idf/issues/3160
Possibly also fix for https://github.com/espressif/esp-idf/issues/2936
Adds build system test to catch any future direct execution of Python in
the standard build process.
