Better Circular DMA support#244

Draft

rudihorn wants to merge 8 commits intostm32-rs:masterfrom

rudihorn:dma-len

Commits on Jun 27, 2020

Improve DMA ergonomics when working with generics
TheZoq2
committed

Commits on Jun 28, 2020

Commits on Jul 3, 2020

Merge branch 'generics-friendly-dma' of https://github.com/TheZoq2/stm32f1xx-hal
Rudi Horn
committed

Commits on Jul 5, 2020

add granular circular DMA
Rudi Horn
committed
add more comments and ensure position is reset for read till end operations
Rudi Horn
committed

Commits on Jul 12, 2020

rename CircBuffer to CircDoubleBuffer
Rudi Horn
committed
rename CircBufferLen to CircBuffer, similarly rename traits
Rudi Horn
committed