Add pre-requisites for enabling the cycle counter to docs #346
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375: Prepare v0.7.4 r=thejpster a=adamgreig I've created a new branch, `v0.7.x`, which is currently at the latest non-breaking commit (so includes #346 #349 #347 #351 #339 #352 #348 #363 #362 #361 but does not include #342), to track the 0.7 series since master now contains breaking changes for v0.8. This PR (which targets the new branch) cherry-picks #372 #369 #374 and bumps the version to v0.7.4 (and updates CHANGELOG) ready for a new v0.7.4 release. Once complete I'll also backport the changelog entries and bump the version in master to 0.7.4. I think this is everything that should be in 0.7 -- the only excluded PRs from master are #342 and #367 I believe, and I don't think we have any open PRs targeting 0.7 either. Any other thoughts on items for inclusion in 0.7.4 (or other changelog entries I missed)? Co-authored-by: bors[bot] <26634292+bors[bot]@users.noreply.github.com> Co-authored-by: Adam Greig <adam@adamgreig.com>
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I think adding a note here about per-requisites for the cycle counter is a good idea.
Reference: https://developer.arm.com/documentation/ddi0403/d/Debug-Architecture/ARMv7-M-Debug/Debug-register-support-in-the-SCS/Debug-Exception-and-Monitor-Control-Register--DEMCR?lang=en#BCGJGAGC
This may just be a me issue, I always forget to set the global trace enable when I go to use the cycle counter. Feel free to close if you think this is a non-issue.