Support for new CH32V006 / CH32V005 boards?

[brian-smith-github]

Hi again.
Do you know if support will be added for the upcoming new versions of the chip - e.g. CH32V006 and CH32V005. Both have more ram/flash, and a new version of the RISC-V core that now includes hardware-multiply (zmmul extension).
Thanks.

[cnlohr]

We intend to add support as soon as we can get them in-hand. Making use of the zmmul instruction will require at least GCC 12, which we don't yet have a recommended Windows GCC build yet, but for Linux we hope to support the platforms shortly after we get chips!

[TommyMurphyTM1234]

We intend to add support as soon as we can get them in-hand. Making use of the zmmul instruction will require at least GCC 12, which we don't yet have a recommended Windows GCC build yet

Hi @cnlohr - could you use the Embecosm or xPack binary builds perhaps?

• https://www.embecosm.com/resources/tool-chain-downloads/
• https://xpack.github.io/dev-tools/riscv-none-elf-gcc/

Note that the xPack toolchain uses a different prefix to the "usual" one - riscv-none-elf-* rather than riscvXX-unknown-elf-* - in case that's an issue (e.g. for your Makefiles):

• https://xpack.github.io/dev-tools/riscv-none-elf-gcc/#riscv-none-elf-gcc

If those binary builds are not adequate and you need a specific build then, in my experience, using crosstool-NG to do a Canadian Cross build (build host = Linux, run host = Windows, target ISA = RISC-V) of the toolchain for Windows works well - e.g.:

• How to build on Windows? riscv-collab/riscv-gnu-toolchain#1442

If I can be of any assistance let me know.