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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
  • 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

Reply
  • 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

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