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https://issues.apache.org/jira/browse/MYNEWT-303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15433604#comment-15433604
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Sterling Hughes commented on MYNEWT-303:
----------------------------------------

HALs for SPI and UART have non-blocking equivalents.  The goal is to have a 
drivers interface on top of these that provide things like timeouts (along with 
OS interactions.) 

I2C is blocking only -- which I'm inclined to leave.  I agree I2C needs a 
timeout.

> Timeout for SPI/I2C/UART
> ------------------------
>
>                 Key: MYNEWT-303
>                 URL: https://issues.apache.org/jira/browse/MYNEWT-303
>             Project: Mynewt
>          Issue Type: Improvement
>          Components: HAL
>            Reporter: Stephane D'Alu
>            Assignee: Marko Kiiskila
>
> HAL should support user controllable timeout for blocking operation on 
> I2C/SPI/UART bus



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