• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 79 subscribers
  • Views 591 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Interrupting continous transmitting, w. RX

Simon Lund
Prodigy 200 points
Hello all
I have a MSP-EXT430G2 launchpad with a g2432 uC. I am writing a program where it’s possible to communicate using RXD & TXD. Furthermore it's at the moment possible to step into different modes, depending on the received bytes. One of the modes sends continuously 24 bytes every 32ms, controlled by the WD-timer. Unfortunate I can’t interrupt with typing (in terminal), because the program is busy transmitting using TimerA0 interrupt.
It’s not a problem to communicate when the program doesn’t transmit even though the watchdog interrupts every 32 ms. The WDinterrupt rutine consists:
  if (BreakEnd == true && State == 1)
  {
   InitWDT(); //Starts WD again 
   SendData();//24 bytes
  }
The Timers are driven by Systemclock 12MHz, and I use a Baudrate at 115200
Any suggestions what to do to get in contact with RX-rutine to save RX-byte and keep transmitting?
Have a nice weekend!
/Simon
  • 0
    Expert 1170 points

    Reducing the baudrate for the communication would help....

  • 0
    Expert 1170 points

    Another idea.... keep the WDT interrupt short.... e.g. just set a flag and handle it it the main program. The benefit would be that this routine could be interrupted by the comm functionality.....

    Another - maybe really bad idea - is to activate nested interrupts.... I mean setting the GIE bit in the WDT ISR; but as mentioned that's not a good programming style because there is a risk of a stack overflow!

**Attention** This is a public forum