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Compiler/MSP430G2553: MSP430G2553

Anthonis T F
Prodigy 40 points
Part Number: MSP430G2553

Tool/software: TI C/C++ Compiler

Hello,

I am beginner in embedded c, so can you please help what the code  "while (!(IFG2&UCA0RXIFG));" means.

  • 0
    TI__Mastermind 20015 points

    in case either IFG2 or UCA0RXIFG is 0, it is while(!0), code will stay in while loop. in case both IFG2 and UCA0RXIFG are 1, it is while (0). code will continue running. this code is waiting flag setting. Thanks

  • 0
    Guru 88700 points

    UCA0RXIFG becomes =1 when a byte is received by the serial port (USCI) UCA0. It becomes =0 when the program reads that byte from UCA0RXBUF. [Ref F2 series User Guide (SLAU144J) Section 15.4.13]

    On the G2 Launchpad UCA0 is the "backchannel" UART connected to the USB (and thus to the PC), so this will happen when the PC sends a byte to the MSP430.

    That loop spins (doesn't go on to the next line) until a byte is received.