ARMGCC
Update startup and system file from M4 platform files to M0p platform files.
Open the CMakeLists.txt of the example, such as FRDM-K32L3A6\boards\frdmk32l3a6\usb_examples\usb_device_hid_mouse\bm\armgcc\ CMakeLists.txt
The bellow picture shows how to change m4 project files to M0p project file.
Open CMakeLists.txt.
Replace all the CPU setting from cortex-m4 to cortex-m0plus.
Replace all the ”-mfloat-abi=hard” to “-mfloat-abi=soft”
Delete all “mfpu=fpv4-sp-d16”
Change the linker configure file form M4 link file to M0p link file. The linker file path is devices\ K32L3A60 folder.
Copy K32L3A60xxx_cm0plus_flash.ld from FRDM-K32L3A6 \devices\ K32L3A60 \gcc to the example project folder. Take usb_device_hid_mouse as example.
Modify the CMakeLists.txt.
Change all the CPU MACRO from “CPU_K32W042S1M2VPJ_cm4” to “CPU_K32W042S1M2VPJ_cm0plus” in CMakeLists.txt.
Add int-mux file to M0p project, as bellow
Add FRDM-K32L3A6 \devices\K32W042 K32L3A60 S1M2\drivers\fsl_intmux.c and fsl_intmux.h files to project.
Check the fsl_intmux.c/ fsl_intmux.h is in FRDM-K32L3A6 \devices\K32W042 K32L3A60 S1M2\drivers folder.
For freertos example. Update the freertos related portable file and include path from M4 to M0.
Change all the source path and include path“Source/portable/GCC/ARM_CM4F” to “Source/portable/GCC/ARM_CM0”,
After the above project configuration is complete, the m4 USB example project would be changed to M0p project. M0p example USB project can now be downloaded and debugged.