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UART Interrupt in Energia

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Energia does not implement an API for UART TX/RX interrupt callback. You could however easily modify HardwareSerial.cpp/.h and insert an optional hardware callback.

I would add a function e.g. HardwareSerial::attachTxInterrupt(void (*userFunc)(void)) / HardwareSerial::attachRxInterrupt(void (*userFunc)(void)). Use attachInterrupt(void (*userFunc)(void)) in WInterrupts.c as an example. Add the TX and RX userFunc as a private member in HardwareSerial.h. Then in the tx/rx ISR check if the a function has been registered, if so call it.

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