sammcj/fence_rcd_serial

# Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes #

## Breaking Changes

Are there any breaking changes in this PR, If yes, please list them.

## How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

- Test 1
- Test 2

## Checklist

- [ ] I have performed a self-review of my own code.
- [ ] I have commented my code, particularly in hard-to-understand areas.
- [ ] I have made corresponding changes to the documentation.
- [ ] My changes generate no new warnings.