How to disable the timer before sleep?

[powerup]

nRF52832, SDK15.0.0, S132

Hello.

I want to go into system on sleep and not wake up until I press the button.

But I'm using timer 1, so it seems to continue wakeup.

So I tried to disable the timer before sleeping.

timer_configure();                  // Timer Enable

while(1){
  
  //nrf_drv_timer_disable(&hTIMER);
  //nrf_drv_timer_uninit(&hTIMER);
  NRF_TIMER1->TASKS_STOP = 1;

  nrf_pwr_mgmt_run();

  //nrf_drv_timer_enable(&hTIMER);
  
  NRF_TIMER1->TASKS_START = 1;
  
  nrf_gpio_pin_write(24,false);
  nrf_delay_ms(100);
  nrf_gpio_pin_write(24,true);
  nrf_delay_ms(100);
}

(P0.24 : LED)

But it does not sleep.

If "//NRF_TIMER1-> TASKS_START = 1;"

It seems to wakeup only when the button is pressed.

I do not know why.
Is there any reason other than a timer?

(The code is based on the ble_uart example.)

[Vidar Berg]

Hi,

Can you upload your main.c file here? The provided code snippet does not provided enough information unfortunately. 

[powerup]

Hi,

Main.c is as follows.

int main(void)
{   
    ret_code_t err_code;    

    // Initialize.
    //uart_init(); 
    //log_init();
    timers_init();
    power_management_init();
    ble_stack_init(); 
    sd_power_dcdc_mode_set(NRF_POWER_DCDC_ENABLE);
    peer_manager_init();
    
    /* EEPROM Init */ 
    ret_code_t rc;
    nrf_fstorage_api_t * p_fs_api;
    p_fs_api = &nrf_fstorage_sd;
    rc = nrf_fstorage_init(&fstorage, p_fs_api, NULL);
    APP_ERROR_CHECK(rc);
    nrf_delay_ms(100);
    
    
    gap_params_init();
    gatt_init();
    services_init();
    advertising_init();
    conn_params_init();

    bsp_board_init(BSP_INIT_BUTTONS);   
    bsp_board_init(BSP_INIT_LEDS); 
    interrupt_configure(); 
    timer_configure();  

    advertising_start();

    saadc_init();     
    HX711_init();   
    PWM_configure(); 
    

    while(1){       
	//nrf_drv_timer_disable(&hTIMER);
	//nrf_drv_timer_uninit(&hTIMER);
	NRF_TIMER1->TASKS_STOP = 1;

	nrf_pwr_mgmt_run();

	//nrf_drv_timer_enable(&hTIMER);

	NRF_TIMER1->TASKS_START = 1;

	nrf_gpio_pin_write(24,false);
	nrf_delay_ms(100);
	nrf_gpio_pin_write(24,true);
	nrf_delay_ms(100);	
    }
}

I also use a lot of current in sleep.
Should I disable my use of timer, adc, pwm, twi, spi, etc before sleep, whether it is system on sleep or system off phase?
I wonder what I should do before I go to sleep.

[Vidar Berg]

Hi, I still don't see the function definitions. In any case, please start a debug session, let it run for a few seconds, then pause it to see where your code hangs I assume it hangs somewhere in your code since it doesn't go to sleep. 

Also, have you checked if you get expected sleep current if you comment out the functions call below?

timer_configure();

advertising_start();

saadc_init();
HX711_init();
PWM_configure(); 

NRF_TIMER1->TASKS_START = 1;

PWM and TIMERx peripherals will increase the idle current because they keep the HF clock source active in sleep. 

[powerup]

Hi, then turn off HFCLK before sleep, 

there a way to restart HFCLK when wake up?