where is the swd protocol documentation

[octavio]

I want to make a programmer for rf51822.

[RK]

Since SWD is an ARM protocol the documentation is on the ARM site. CMSIS-DAP is a free implementation of SWD for a starter.

[Jørgen Holmefjord]

Links: info and paper.

[octavio]

Thanks.The paper has some info but seems to be incomplete,i will study it,and probably come back latter with more questions.