Henrik Karlsson

Failing to return from interrupt (newbi question) - MC9S08QE128

Discussion created by Henrik Karlsson on Feb 6, 2008
Latest reply on Feb 7, 2008 by bigmac
Hi Folks,

Im new to the arcitecure and Ide (CodeWarrior) and find this very confusing... I have a timer interrupt that should fire every 1ms. When I set a break point in TPM_ISR, I get there but when Im about to return from the ISR (at the RTI instruction) I get the error message "Error: At location 0299 -
Error: Attempt to use invalid or uninitialized memory". Has anyone a clue about the problem here? Where could the problem be?

The ISR (probably not the problem):
void interrupt VectorNumber_Vtpm3ch3 TPM_ISR(void)

  TPM3C3SC_CH3F;      // Clears timer flag
  TPM3C3SC_CH3F = 0;

By the way, Im not running on the Full Chip simulation, not real hardware.

Best regards

Message Edited by hek on 2008-02-06 12:33 PM