power_manage doesn't work in this case

[Juan Moya]

Hello,

I don't understand why the power_manage(); doesn't work when I don't simulate the speed & cadence??

//#define SIMULATED
void csc_sim_measurement(ble_cscs_meas_t * p_measurement, uint8_t boolSpeedZero){
    
    static uint16_t cumulative_crank_revs = 0;
    static uint16_t event_time            = 0;
    static uint16_t wheel_revolution_mm   = 0;
    static uint16_t crank_rev_degrees     = 0;

    uint16_t mm_per_sec;
    uint16_t degrees_per_sec;
    uint16_t event_time_inc;
        
    event_time_inc = (1024 * SPEED_AND_CADENCE_MEAS_INTERVAL) / 1000;                                    // Per specification event time is in 1/1024th's of a second.
    p_measurement->is_wheel_rev_data_present = true;                                                                    // Calculate simulated wheel revolution values.

    //--------------------------------------------------------------------------------------------------
    // Calculate simulated speed values ----------------------------------------------------------------      
        #ifdef SIMULATED        
        mm_per_sec = KPH_TO_MM_PER_SEC * sensorsim_measure(&m_speed_kph_sim_state,&m_speed_kph_sim_cfg);        
        #endif
        #ifndef SIMULATED
        if(boolSpeedZero){        
            mm_per_sec                                 = 0;            
        }else{
            mm_per_sec                                 = (speed_wheel__*100) / 36;
        }
        #endif    
        wheel_revolution_mm     += mm_per_sec * SPEED_AND_CADENCE_MEAS_INTERVAL / 1000;
        m_cumulative_wheel_revs += wheel_revolution_mm / WHEEL_CIRCUMFERENCE_MM;
        wheel_revolution_mm     %= WHEEL_CIRCUMFERENCE_MM;
        
    p_measurement->cumulative_wheel_revs = m_cumulative_wheel_revs;
    p_measurement->last_wheel_event_time = event_time + (event_time_inc * (mm_per_sec - wheel_revolution_mm) / mm_per_sec);

    // Calculate simulated cadence values.
    p_measurement->is_crank_rev_data_present = true;
        
        #ifdef SIMULATED        
        degrees_per_sec = RPM_TO_DEGREES_PER_SEC * sensorsim_measure(&m_crank_rpm_sim_state,&m_crank_rpm_sim_cfg);
        #endif
        #ifndef SIMULATED    
        if(boolSpeedZero){    
            degrees_per_sec                 = 0;            
        }else{            
            kdnce_current__                 = kdnce_current__ - 200;
            degrees_per_sec                 = (uint16_t)(360.f * ( 1024.f/(float)kdnce_current__ ));        
        }
        #endif

        crank_rev_degrees     += degrees_per_sec * SPEED_AND_CADENCE_MEAS_INTERVAL / 1000;
        cumulative_crank_revs += crank_rev_degrees / DEGREES_PER_REVOLUTION;
        crank_rev_degrees     %= DEGREES_PER_REVOLUTION;        
        
    p_measurement->cumulative_crank_revs = cumulative_crank_revs;
    p_measurement->last_crank_event_time = event_time + (event_time_inc * (degrees_per_sec - crank_rev_degrees) / degrees_per_sec);

    event_time += event_time_inc;
}

[run_ar]

Hi,

Can you please be specify what you mean when you say that power manager does not work? Are you saying it never goes to sleep or are you saying it does not wake up from sleep?

[Juan Moya]

Hello,

I detect that this line
 degrees_per_sec                 = (uint16_t)(360.f * ( 1024.f/(float)kdnce_current__ ));     

it consumes a lot of energy.

[MartinBL]

Hi,

When floating point math suddenly makes your device draw a lot of current it is probably because of this erratum: [87] CPU: Unexpected wake from System ON Idle when using FPU.

Can you try to implement the suggested workaround and see what happens?