Add a 24 series I2C EEPROM emulator #741
Draft
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
REMOVE THIS COMMIT BEFORE MERGING
Order of the dev shell packages matters, yosys's propagatedBuildInput python interpreter was taking precedence over ours. REMOVE THIS COMMIT BEFORE MERGING
REMOVE THIS COMMIT BEFORE MERGING
REMOVE THIS COMMIT BEFORE MERGING
The tests are rather slow so they hinder iteration time while just trying out stuff quickly. REMOVE THIS COMMIT BEFORE MERGING
Implement masking for the I2CTarget address matching. This way devices that use address bits as variable inputs can be emulated. Also add `address_i` signal to I2CTarget which an acknowledged address is written to simultaneously to the start strobe of the target (not the bus). Emulated devices using address bits as inputs can read them from this signal.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
I've started writing a 24-series I2C EEPROM emulator applet for the glasgow. Currently this still has some issues with addressing and the way addresses for reads/writes are sent to the host is not yet ready for multi-byte addresses and the most significant bits of the address contained in the least significant I2C address bits.
Since I've asked around on the IRC in relation to this applet a bunch of times now I thought it was time to at least open a draft PR.
This is not yet ready for review and I will be working on improving it some more (perhaps figuring out how to test it against the 24x applet too).
This also adds GlasgowAnaylzer / --trace events for I2CBus, I2CTarget, and I2CInitiator. I'll probably extract this into another branch and PR once I'm done with this emulator.