AURIX™ Forum Discussions

[User17079]

Hi

I use TC277 DC-Step where I have two cores running and want to put Core1 in idle state by itself.
After calling Mcu_SetMode(MCU_IDLE) from Core1, the core doesn't gets into idle state. I confirmed this by looking at REQSLP flag.

What could be that I'm missing here to put the core in IDLE state?

Thanks!
Sivakumar M.

[cwunder]

Here is a code snippet where CPU1 places itself in IDLE mode

/** \brief Idle Mode and Sleep Mode Request * In Idle Mode or Sleep Mode, these bits are cleared in response to an
 * interrupt for the CPU, or when bit 15 of the corresponding CPU Watchdog
 * Timer register (bit WDTCPUxSR.TIM[15]) changes from 0 to 1. In Standby
 * Mode, these bits are cleared on wake-up. REQSLP maybe written only when
 * either CPU or Safety ENDINIT bits are set to 0. CPU ENDINIT bit has to
 * be set back after REQSLP is written for the mode transition to take place.
 * In case of Safety ENDINIT, the mode transition will be issued immediately
 * and does not wait till Safety ENDINIT is set back to 1 again.
 */
typedef enum
{
    pmcsrx_reqslp_RequestRunMode = 0, /**< \brief Request CPU Run Mode */
    pmcsrx_reqslp_RequestIdleMode = 1, /**< \brief Request CPU Idle Mode */
    pmcsrx_reqslp_RequestSleepMode = 2, /**< \brief Request System Sleep Mode */
    pmcsrx_reqslp_RequestStandbyMode = 3, /**< \brief Request System Standby Mode */
} PMCSRx_REQSLP_enum;


int core1_main (void)
{
    IfxCpu_enableInterrupts();
    /*
     * !!WATCHDOG1 IS DISABLED HERE!!
     * Enable the watchdog in the demo if it is required and also service the watchdog periodically
     * */
    IfxScuWdt_disableCpuWatchdog (IfxScuWdt_getCpuWatchdogPassword ());
    uint16 cpu1Password = IfxScuWdt_getCpuWatchdogPassword();


    /* Cpu sync event wait*/
    IfxCpu_emitEvent(&cpuSyncEvent);
    IfxCpu_waitEvent(&cpuSyncEvent, 1);
    while (1)
    {
          IfxScuWdt_clearCpuEndinit(cpu1Password);
        SCU_PMCSR1.B.REQSLP = pmcsrx_reqslp_RequestIdleMode;
        IfxScuWdt_setCpuEndinit(cpu1Password);
    }
    return (1);
}

[User17079]

Hi cwunder,

Currently the driver what I have is based on AUTOSAR. So I couldn't find some functions from your code snippet..
If you tell me where the following functions are located (filename), that would be helpful.
function names: IfxCpu_enableInterrupts, IfxCpu_emitEvent, IfxCpu_waitEvent, IfxScuWdt_clearCpuEndinit.

Could you also tell me the driver name and version, that you have used in your code snippet?

Thanks!
Siva.

[NeMa_4793301]

Those functions are from the iLLD (Infineon Low Level Device Drivers), available on MyICP.

[User17079]

Thanks!

I got access to the iLLDs from https://www.infineon.com/cms/en/product/promopages/aurix-development-studio/#cE