• State Not Answered
  • Locked Locked
  • Replies 6 replies
  • Subscribers 21 subscribers
  • Views 1314 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

XC16X: No extern interrupt on Port9.2

Rainer Birkner

Hi, I use an XC164CM controller (on a Infineon Evalboard). My problem is, thats not possible to start an extern interrupt (EX4IN) on Portpin P9.2.
The register values are correct for the simulation with µVision3. Probably I have a hardware problem.
The positive trigger edge is from a 74LS00. But the controller can't detect the edge and no interrupt is started.
Some ideas?
Kindly regards
Rainer

Parents Reply Children
  • 0 in reply to ImPer Westermark

    Sorry,

    void UnlockProtecReg(void)
{
  uword uwPASSWORD;
  if((SCUSLS & 0x1800) == 0x0800)      // if low protected mode
  {
    uwPASSWORD = SCUSLS & 0x00FF;
    uwPASSWORD = (~uwPASSWORD) & 0x00FF;
    SCUSLC = 0x8E00 | uwPASSWORD;      // command 4
  }  // end if low protected mode
  if((SCUSLS & 0x1800) == 0x1800)      // if write protected mode
  {
    SCUSLC = 0xAAAA;                   // command 0
    SCUSLC = 0x5554;                   // command 1
    uwPASSWORD = SCUSLS & 0x00FF;
    uwPASSWORD = (~uwPASSWORD) & 0x00FF;
    SCUSLC = 0x9600 | uwPASSWORD;      // command 2
    SCUSLC = 0x0800;                   // command 3; new PASSWOR is 0x00
    uwPASSWORD = SCUSLS & 0x00FF;
    uwPASSWORD = (~uwPASSWORD) & 0x00FF;
    SCUSLC = 0x8E00 | uwPASSWORD;      // command 4
  }  // end if write protected mode
}

    Thanks all for help!
    Rainer