Add uart_is_busy() method for UART devices #711
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The uart_is_busy() method returns `true` as long as the UART is busy transmitting data. It will return `false` once all bits (including stop bits) have been transmitted.
Rahix
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Dec 28, 2023
Replace the manual BUSY flag readout with a call to a HAL method. This method is not yet upstream (pending review [1]), so for the time being, reference a vendored rp2040-hal version. [1]: rp-rs/rp-hal#711
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The
uart_is_busy()method returnstrueas long as the UART is busy transmitting data. It will returnfalseonce all bits (including stop bits) have been transmitted.