WIP: Attempt at DMA traits #26
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I have implemented DMA for Spi in nikhilkalige/stm32f411-bsp I have then tried to use the Spi in a driver for TLC5955 in nikhilkalige/tlc5955 Note: I created all the 3 Dma traits and later somewhat modified the DmaWrite trait, as that was one I needed first to get stuff going.. |
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Hmm.. May be it would make sense to use something like a |
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☔ The latest upstream changes (presumably #27) made this pull request unmergeable. Please resolve the merge conflicts. |
| //! DMA Interface | ||
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| /// Static alias for DMA | ||
| pub type Static<T> = &'static mut T; |
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I don't see this alias being used anywhere
| type Transfer: dma::Transfer + ?Sized; | ||
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| /// Recieve `words` from the slave. | ||
| fn recieve_dma<Buffer, Payload>(self, words: &'static mut Buffer) -> Self::Transfer |
| Buffer: Unsize<[Word]>; | ||
| } | ||
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| /// DMA Write mode |
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Documentation needs to be updated
| type Payload; | ||
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| /// Get buffer | ||
| fn deref(&self) -> &Self::Item; |
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Does it make sense to allow access to the data while the transfer is still ongoing?
| pub trait Transfer { | ||
| /// Return type | ||
| type Item; | ||
| /// Return type |
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Documentation could be more helpful. What's the difference between Item and Payload?
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I'm trying to implement DMA for the STM32F429. As my use-case is (gapless) audio, I'm interested in using it in a continuous (double-buffered/circular), not one-shot mode. |
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Thanks for the PR @nikhilkalige. I think we should first design an API that meets all the requirements in #37 (comment) and then test it out of tree for a bit before landing any new struct / trait in this crate so I'm going to close this PR until we have a better idea of what pieces we want to land in this crate. |
26: Transactional WriteRead r=ryankurte a=eldruin This fixes rust-embedded#25 by implementing a transactional write-read without STOP in the middle. It also fixes a type cast which was the only warning present. Co-authored-by: Diego Barrios Romero <[email protected]>
27: Release 0.3.0 preparation r=ryankurte a=eldruin I updated the changelog with everything that happened since the 0.2.2 release and bumped the minor version because of the digital::v2. I also fixed setting the embedded-hal version to 0.2.3 because that is when the digital::v2 traits were released. This branch sits on top of rust-embedded#26 with the hopeful date of today :) Co-authored-by: Diego Barrios Romero <[email protected]>
This does not work in any manner.
I am working on a Persistence of vision project of mine. I somehow need DMA to get the data rate high. This is my attempt at getting it to work.
I have tried to replicate the DMA design from the bluepill crate. I liked the move semantics used there. However I am not sure to get it working when you have
serialstored in a structure.Hopefully someone who is better than me at rust, can give some ideas and suggestions.. :)