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Add IRQ-driven buffered USART implementation for STM32 v2 usart (#356)

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* Add IRQ-driven buffered USART implementation for STM32 v2 usart

* Implementation based on nRF UARTE, but simplified to not use DMA to
  avoid complex interaction between DMA and USART.
* Implementation of AsyncBufRead and AsyncWrite traits
* Some unit tests to ring buffer
* Update polyfill version
* Update sub module to get usart IRQ fix
This commit is contained in:
Ulf Lilleengen
2021-08-16 17:16:49 +02:00
committed by GitHub
parent c310f18aaf
commit cbff0398bb
7 changed files with 325 additions and 16 deletions
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examples/stm32l0/Cargo.toml
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@ -21,6 +21,7 @@ embassy = { version = "0.1.0", path = "../../embassy", features = ["defmt", "def
embassy-traits = { version = "0.1.0", path = "../../embassy-traits", features = ["defmt"] }
embassy-stm32 = { version = "0.1.0", path = "../../embassy-stm32", features = ["defmt", "defmt-trace", "stm32l072cz", "time-driver-tim3"] }
embassy-hal-common = {version = "0.1.0", path = "../../embassy-hal-common" }
embassy-macros = { path = "../../embassy-macros" }
defmt = "0.2.0"
defmt-rtt = "0.2.0"