S12 / MagniV Microcontrollersのトピックis it support sleep mode and wake-up function code in ProcessorExpert?

is it support sleep mode and wake-up function code in ProcessorExpert?

byeongjinkim — Tue, 20 Jun 2017 10:18:16 GMT

is it support sleep mode and wake-up function code in ProcessorExpert?

if it supported, how can i use?

mcu : S12ZVMC128

Codewarrior 10.7 version

Re: is it support sleep mode and wake-up function code in ProcessorExpert?

RadekS — Tue, 20 Jun 2017 16:43:22 GMT

Hi Byeongjin,

Since you wrote about sleep mode, I suppose that you question is related to MSCAN module.

The PE have an option for CAN Wakeup, but this option just affects WUPE and WUPM bits configuration. No specific code is generated.

Please look at attached simple example code for CAN wake-up.

Note: this example code was created for older S12XE MCU, but the MSCAN module is still the same.

The important code is:

//============

CANCTL0_WUPE = 1; //wake up enable

CANRIER_WUPIE = 1; //wake up interrupt enable

//============

and:

CANCTL0_SLPRQ = 1; //sleep mode request

while(CANCTL1_SLPAK == 0); //wait for acknowledge of sleep mode

asm ANDCC #0x7F; //clear S bit

asm nop;

asm STOP; //STOP mode

You should also create a wake-up ISR like:
interrupt VectorNumber_Vcan0wkup void CAN_WAKE(void)
{
//your code

CANRFLG=0x80 //clear WUPIF flag

CANRIER_WUPIE = 0; //wake up interrupt disable
}

I hope it helps you.

Have a great day,
Radek

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Re: is it support sleep mode and wake-up function code in ProcessorExpert?

byeongjinkim — Wed, 21 Jun 2017 01:28:31 GMT

i will using external pin port. (P port)

could i view example for pin interrupt wake-up and low-power mode?

Re: is it support sleep mode and wake-up function code in ProcessorExpert?

RadekS — Wed, 21 Jun 2017 10:33:23 GMT

Hi Byeongjin,

For example, wake-up by pin PP0

In main();

DDRP_DDRP0 = 0;   //set PP0 as input
PPSP_PPSP0 = 0;   //pull-up resistor is selected, falling edge selected
PERP_PERP0 = 1;   //pull-up resistor is enabled
PIEP_PIEP0 = 1;   //interrupt enabled
//…
EnableInterrupts;
//...
asm ANDCC #0x7F;  //clear S bit
asm STOP;         //STOP mode
//…You should here restore your configuration changed by stop mode enter like enable external oscillator or configure clock for RTI,… 
//…‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

You should also create a wake-up ISR like:

interrupt VectorNumber_Vportp void PortP_ISR(void)
{
  if(PIFP_PIFP0 == 1)
  {
     //your code 
    PIFP = 0x01; //clear the PIFP0 interrupt flag    
  }
}  
‍‍‍‍‍‍‍‍‍

I hope it helps you.

Have a great day,
Radek

Re: is it support sleep mode and wake-up function code in ProcessorExpert?

byeongjinkim — Wed, 21 Jun 2017 23:11:36 GMT

thank you.

have a good day~