1. Download and install toolchain
$ curl https://github.com/hpmicro/riscv-gnu-toolchain/releases/tag/2022.05.15
2. Download and install openocd
Download hpmicro sdk_env, openocd in the path: sdk_env/tools/openocd
3. Configure and build NuttX
$ mkdir ./nuttxspace
$ cd ./nuttxspace
$ git clone https://github.com/apache/nuttx.git nuttx
$ git clone https://github.com/apache/nuttx-apps.git apps
$ cd nuttx
$ make distclean
$ ./tools/configure.sh hpm6750evk2:nsh
$ make menuconfig
$ make V=1
Note: make menuconfig to config toolchain
==================
To switch GNU riscv64 toolchain to GNU riscv32 toolchain, the following option must be selected:
System Type --->
Toolchain Selection --->
[ ] Generic GNU RV64 toolchain
[x] Generic GNU RV32 toolchain
Make sure HPMicro GNU riscv32 toolchain have been installed and be found in PATH.
4. Debug the nuttx with openocd and run
$ picocom -b 115200 /dev/ttyACM0
When using fireDAP, command as follows. Those cfg files in the path: sdk_env/hpm_sdk/boards/openocd.
$ openocd -f probes/cmsis_dap.cfg -f soc/hpm6750-single-core.cfg -f boards/hpm6750evk2.cfg
$ riscv32-unknown-elf-gdb ./nuttx
(gdb) target extended-remote [ip_addr]:3333
(gdb) load
(gdb) c
4c01594d5b