After TBM interrupt actice, can't return to mainloop

[Simen]

Dear ALL,

I use CodeWarrior to design MC68HC908GR4.

But I have a problem about using its TBM interrupt.

After the isrTBM active,it can't return to mainloop.

The program always run in isrTBM.

Any suggestion ?

Thanks a lot for help!

Attach file is Demo project,it can show the problem.

[rocco]

Hi Simen, and welcome to the forum.

You need to clear the TBM interrupt, as it won't go away on its own.

To clear the interrupt flag, TBIF, you need to write a one to the TACK bit from within your interrupt service routine. Both of these bits are in the TBCR register.

[Simen]

Thanks a lot for your help,I have solved it!