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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 Rainer Birkner

    Hi Chris,

    yes - this was the solution, much thanks!
    Rainer

    Here is the code snippet from Infineon(DAvE):
    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
    }

Reply
  • 0 in reply to Rainer Birkner

    Hi Chris,

    yes - this was the solution, much thanks!
    Rainer

    Here is the code snippet from Infineon(DAvE):
    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
    }

Children
  • 0 in reply to Rainer Birkner

    Please read the instructions for how to post code on this forum. They are not hard to find. Just two lines above the text box where you enter your message.

    The code you have posted is unreadable!

  • 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