howto switch into stop3 mode with my MC9S08DZ32

[kelly1966]

Hello

I have a question about my MC9S08DZ32 which I've been experimenting for a five of weeks.

I'm trying unsuccessfully for several days to move the MCU into „stop3 mode“ and wake-up the MCU via MSCAN.

I also have already read the AN3387 and tried to implement AN2255 and AN2283 but without success (nothing happens).

Now my question:

What I have to do if I want to switch the MCU into the stop3 mode and stay there as long as it receives a message via MSCAN (wake-up).

Is there a specific command for switching the modes or to trigger a specific event or set a flag?

Thank you for your help

TOM

You see some part of my code in the attachment

Original Attachment has been moved to: main-(with-stop3).c.zip

[vicentegomez]

Hi Thomas

To enter to stop mode you need executing a STOP instruction under the conditions as shown in Table 3-1

Also check the WUPIE on MSCAN Receiver Interrupt Enable Register (CANRIER)

Have a great day,
Vicente

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[kelly1966]

Dear Vicente,

A big thanks for your quick answer.

Here is my implemented code, but it don't work.

The MCU spent ~ 13mA and the I can't try the Wake-Up-Iq

And I don't know why...

// ==>> Code

     CANCTL0 |= 0x04; // WUPE = 1 ==> MSCAN Wake-Up enable

     CANRIER |= 0x80; //In CANRIER Bit7 WUPIE = 1

     SOPT1 |= 0x20; // STOPE = 1, SOPT1 Bit5

     SPMSC1 &= ~0x0C; // LVDE + LVDSE = 0, SPMSC1 Bit2 + Bit3

     SPMSC2 &= ~0x01; // PPDC = 0, SPMSC2 Bit0 für Stop3 ohne BDM und untervoltage detection

     This Register I can't find

     //BDCSCR &= ~0x80; // ENBDM = 0 in Register BDCSCR, BDCSCR Bit7

<<==

Is it possible to take a asm command to switch into the stopmade?

And I need your help along

Thanks for your Response

  TOM

-- was that the right button?

[vicentegomez]

Hi Thomas

Sorry for the late response,

please check the attached file this is a code for the S08QE that set it to wake up using the KBI, this can help you. unfortunately I am out of the office to create a project with the DZ,

Please let me know if this help you.

[kelly1966]

Hi Vicente,.

I have unfortunately no a file received, can you send it again?

Big Thanks

TOM

[vicentegomez]

Hi

Here is

[vicentegomez]

or....

void main(void)

{

  // Following a reset, BUSCLK = 4MHz

  SOPT1_STOPE = 1;//     stop mode enable

  SCI1BD = 26;       // SCI baud rate = 4MHz/(16*26)=9615 bps

  SCI1C1 = 0;  //default settings

  //enable transmitter and receiver pins, enables receiver interrupt

  SCI1C2 =  SCI1C2_TE_MASK |  SCI1C2_RE_MASK | SCI1C2_RIE_MASK;

  PTCDD_PTCDD0 =  1; //PTC0 as output

  PTCD_PTCD0 = 1; // PTC0 off

  PTCDD_PTCDD1 =  1; //PTC1 as output

  PTCD_PTCD1 = 1; // PTC1 off

  PTADD = 0;       //PTA as input

  PTAPE = PTAPE_PTAPE2_MASK;  // PTA2 pull up enables

  KBI1PE = KBI1PE_KBIPE2_MASK; //enable interrupt 2

  KBI1SC = KBI1SC_KBIE_MASK ; //KBI enable ,detect edges only

  KBI1ES = 0; // Falling edge eneble

  EnableInterrupts;

  for (;;)

  {

    __RESET_WATCHDOG();

    asm ("STOP");

    PTCD_PTCD1 = ~PTCD_PTCD1;

  }

}

/***************************************************************************************/

void interrupt VectorNumber_Vsci1rx SCI1RX_ISR(void)

{

  (void) SCI1S1;       // read SCIS1 register for clear RDRE flag

  u8receiver = SCI1D;

  SCI1D = u8receiver;

  if (u8receiver == 'l') {

  PTCD_PTCD0= ~ PTCD_PTCD0 ; //toggle PTCD0

  }

}

/***************************************************************************************/

void interrupt VectorNumber_Vkeyboard  kbi_ISR(void)

{

  int i = 5000;  //delay

  while :smileyinfo:

   {

    i--;

  }

  KBI1SC_KBACK = 1; //  Acknowledge KB Interrupts

    PTCD_PTCD0 = ~PTCD_PTCD0;

}

/***************************************************************************************

Regards

Vicente

[kelly1966]

Hallo Vicente,

I do the same I think, but it don't work...

Bool ENTER_STOP_MODE = FALSE; // starts in Normal-Mode

Bool MCU_IS_STOPPED = FALSE;  // the mcu isn't stopped

void main(void)  {// Clear COP Watchdog timeout

    SOPT1 = 0x20;        // STOPE = 1, SOPT1 Bit5

    SPMSC1 &= ~0x0C; // LVDE + LVDSE = 0, SPMSC1 Bit2 + Bit3

    SPMSC2 &= ~0x01; // PPDC = 0, SPMSC2 Bit0 Stop3 with BDM

    MCGC1 = 0xB8;

    MCGC2 = 0x36;

    MCGC3 = 0x00;   

    while(!(MCGSC&0x02)); // Wait until the initialization cycle of the external crystal clock is completed

    // isrTimer1 configure and aktivate

    TPM1MODH = 0xFD; // Timer1 Overflow

    TPM1MODL = 0xD0;

    TPM1SC = 0x4F;

    MSCANInit();// CAN Schnittstelle initialisieren

  //  CANCTL0 |= 0x04;  //  WUPE = 1  ==> MSCAN Wake-Up enable 

  //  CANRIER |= 0x80; // Enable Wake-Up IRQ

  //  RUN:  CANE = 1, CSWAI = X, SLPRQ = 0, SLPAK = 0  

  //  WAIT: CANE = 1, CSWAI = 0, SLPRQ = 0, SLPAK = 0

    EnableInterrupts; 

    for (;;)    {

        if (ENTER_STOP_MODE) { // enter stopmode

            if (!MCU_IS_STOPPED) {

                MCU_IS_STOPPED = TRUE; // the mcu is now stopped

                CANCTL0 |= 0x02;  //  SLPRQ = 1  ==> MSCAN SLEEP

                CANCTL1 |= 0x02;  //  SLPAK = 1  ==> MSCAN SLEEP

                asm ("STOP"); // switch into stop3 Mode      

            }

        }

    }   

// The isrTimer1 sets the (Bool ENTER_STOP_MODE = True);   

// In my canWakeUp irq I  set (ENTER_STOP_MODE = MCU_IS_STOPPED = false) again

// After "asm (STOP);" the mcu ever reset

Thanks for your answer

Tom

[vicentegomez]

Please remember that in some kind of stop mode, the debuger does not work, or if you are using the debuger probably you did not reach the stop mode