CH32 Environment Setup
The RISC-V toolchain situation for the CH32 series is quite chaotic. The following two options are recommended:
- The official riscv-wch-elf bundled with MRS: Supports WCH's rv32imafcxw extended instruction set, but has incomplete C++ standard library support, making it incompatible with libraries like Eigen.
- Upstream riscv32-unknown-elf: Does not support WCH's extended instruction set, but provides complete C++ standard library support. On Windows, that means using MSYS2, which can be a bit of a hassle.
For quick compilation, you can use the Docker image provided by this project.
CMake Configuration
An additional option needs to be configured: LIBXR_CH32_CONFIG_FILE, which specifies the path to the CH32 peripheral library configuration file, such as: ch32v30x_conf.h.
set(LIBXR_SYSTEM FreeRTOS)
set(LIBXR_DRIVER ch)
set(LIBXR_CH32_CONFIG_FILE "ch32v30x_conf.h")
add_subdirectory(libxr)
...