CH32V307 : Debugging with vscode

 This is derived from https://www.justinmklam.com/posts/2017/10/vscode-debugger-setup


1- Install native debugging plugin gdb/... within vscode
2- Add (and change) the following line to your settings.json pointing to the toolchain binaries (especially the riscv gdb) and the wch-openocd bin folder :
"riscv_openocd_path" : "/opt/wch/MounRiver_Studio_Community_Linux_x64_V130/MRS_Community/toolchain/OpenOCD/bin",
"riscv_gdb_path" : "/opt/wch/MRS_Toolchain_Linux_x64_V1.60/RISC-V Embedded GCC/bin/"

3- Create the launch.json file, adapt the name to your project 

{
"version": "0.2.0",
"configurations": [
      {
"name": "riscv_GDB",
"type": "gdb",
"request": "launch",
"cwd": "${workspaceRoot}",
"target": "${workspaceRoot}/build/lnPowerSupply_CH32V3x_72M.elf",
"gdbpath" : "${config:riscv_gdb_path}/riscv-none-embed-gdb",        
"autorun": [        
        "target extended-remote |  ${config:riscv_openocd_path}/openocd -c \"gdb_port pipe; log_output openocd.log\" -f ${config:riscv_openocd_path}/wch-riscv.cfg",
        "set confirm off",
        "set mem inaccessible-by-default off",
        "set  architecture riscv:rv32",
        "set remotetimeout unlimited",
        "set remote hardware-breakpoint-limit 4",
        "mon reset halt",
        "load ",
        "tb main ",
        "b deadEnd "
        ]
     }
   ]
}

NB: This WCH OpenOcd daemon is unstable and needs to be restarted at each launch hence the way it is started here.

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