ON mode IDLE power >2mA

RE: ON mode IDLE power >2mA

tim — Mon, 11 Aug 2014 00:33:15 GMT

Should I continue the question I have or open a new question.

I am a little confused, because I am not answer my question. I am further explaining it. And the comment field does not allow full formating

I am using TWI sw master. I am quite sure I have the TWI disabled. keil shows the twi1 and twi2 enable = 0 and power = 0

How large should the unused TWI time be, for TWI STOP to be beneficial?

Are referring to twi_master_transfer(address, &value,len, TWI_ISSUE_STOP) or NRF_TWI1->TASKS_STOP (I assume this is only for twi_hw_master)

I am using RTC1 to keep track of relative time. Absolute time is not required.

time = APP_TIMER_MILLISEC(NRF_RTC1->COUNTER, APP_TIMER_PRESCALER);

I am using timers as defined in app_timer.c NRF_RTC1

I have created disable enable functions.

void temp_disable(void)
{
    //not nice or polite, HARD DISABLE without checking
    //must remember to enable when needed
    NRF_TEMP->POWER = 0;
}
void temp_enable(void)
{
    //must remember to enable when needed
    NRF_TEMP->POWER = 1;
}

void gpiote_disable(void)
{
    //not nice or polite, HARD DISABLE without checking
    //must remember to enable when needed
    NRF_GPIOTE->INTENSET = 0;
    NRF_GPIOTE->POWER = 0;
}


    void twi_master_disable(void)
    {
        //not nice or polite, HARD DISABLE without checking
        //must remember to enable when needed
        NRF_TWI1->ENABLE  = (TWI_ENABLE_ENABLE_Disabled << TWI_ENABLE_ENABLE_Pos);
        NRF_TWI1->POWER   = 0;
        NRF_TWI0->ENABLE  = (TWI_ENABLE_ENABLE_Disabled << TWI_ENABLE_ENABLE_Pos);
        NRF_TWI0->POWER   = 0;
    }





    void adc_disable(void)
    {
        //not nice or polite, HARD DISABLE without checking
        //must remember to enable when needed
        NRF_ADC->ENABLE  = (ADC_ENABLE_ENABLE_Disabled << ADC_ENABLE_ENABLE_Pos);
        NRF_ADC->POWER   = 0;
        NRF_ADC->ENABLE  = (ADC_ENABLE_ENABLE_Disabled << ADC_ENABLE_ENABLE_Pos);
        NRF_ADC->POWER   = 0;
    }

RE: ON mode IDLE power >2mA

tim — Wed, 06 Aug 2014 12:19:46 GMT

Working through this I "think" it is the wakeup timer that is requiring the 16MHz clock.

How do I set up a wake up timer using the RTC which only requires the 32KHz?

RE: ON mode IDLE power >2mA

Håkon Alseth — Mon, 04 Aug 2014 12:19:13 GMT

The nRF is going into sleep, but the 16M clock source is being kept alive as one of the peripherals that requires the clock is still running. You can see a complete list of the peripherals requiring the 16M clock in the chapter "8.3 Block resource requirements".

While debugging, you can see the state of all peripherals by accessing them from the tab "Peripherals". Set a breakpoint right before going into sleep mode, and see which of the peripherals are still running, and may be causing the 0.7 mA current consumption.

Cheers, Håkon

RE: ON mode IDLE power >2mA

scytulip — Mon, 04 Aug 2014 05:00:26 GMT

Have you tried setting ->POWER property, such as UART0->POWER = 0; I think ->ENABLE is just turning on/off the block in software.