RIOT/cpu/sam0_common/include/vendor

CMSIS from Atmel Software Foundation (ASF)

The include files in this directory tree are copied from Atmel sources. Most of the sam0 files are from ASF (Atmel Software Foundation, version 3.35.1). The SAML10 and SAML11 files are from, so called, atpacks.

The sam0 files

The directory tree was copied "as is" from ASF path sam0/utils/cmsis/ and its structure is as follows:

cmsis
├── samd21
│   ├── include
│   │   ├── component
│   │   ├── instance
│   │   └── pio
│   └── source
│       ├── gcc
│       └── iar
.
.
.
├── samr21
│   ├── include
│   │   ├── component
│   │   ├── instance
│   │   └── pio
.   └── source
.       ├── gcc
.       └── iar

However, as only the header files in include and its subfolders are required, all source folders are removed.

Be aware that if you want to make changes to any file in this tree that the changes will be lost when a new ASF release is going to be used.

sam0.h

A SAM based CPU should include sam0.h in this directory, which will resolve any CPU family specific includes required.

SAML10/SAML11 files

Since 2019 the necessary variant files are available in atpacks at

http://packs.download.atmel.com/

saml10: Atmel.SAML10_DFP.1.0.142.atpack saml11: Atmel.SAML11_DFP.1.0.91.atpack

Each atpack has an include subdirectory with the files we copy into RIOT. The files are copied unmodified.

SAMR34 files

samr34: Atmel.SAMR34_DFP.1.0.11.atpacks

Each atpack has an include subdirectory with the files we copy into RIOT. The files are copied unmodified.

sam23.h

A SAML1x based CPU should include sam23.h in this directory, which will resolve any CPU family specific includes required.

Usage and porting for SAM based CPUs

If other CPUs are needed, copy the include files from ASF or atpack for the respective CPU family here and adapt sam0.h or sam23.h accordingly.