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adafruit / Adafruit_nRF52_Arduino

Adafruit code for the Nordic nRF52 BLE SoC on Arduino
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add availableForWrite() for uart #802

Closed hathach closed 10 months ago

hathach commented 10 months ago

add availableForWrite() for uart. Since UART does not use ring buffer for TX, therefore it is either busy or not. Fix #750