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I am trying to do modbus communication with instaspin. For controlling enable pin, I need to ensure that serial transmit register as well as serial buffer are empty. Can anybody pl. let me know what bit can be polled for the same?
Please refer to SCI chapter of MCU Technical Reference Manual, you can check the RXRDY bit of SCIRXST register for receive, and TXRDY bit of SCICTL2 register for transmit.
Thanks, should I check for TXRDY or TXEMPTY bit? I think I should check for TXEMPTY bit?