sleep mode in nrf51822

RE: sleep mode in nrf51822

Ole Bauck — Mon, 04 Jan 2016 17:12:55 GMT

Just for clarification:

__WFE(): Short for Wait For Event. Will put the CPU in system ON sleep mode. This is done in sd_app_evt_wait() function (located in power_manage() in the SDK examples). The CPU will wake up on any event.

sd_power_system_off(): Will put the CPU in system OFF sleep mode. The CPU can only wake up on gpio (which is configured in bsp_btn_ble_sleep_mode_prepare()).

See this post for and the Product Specifcation more info and for how much current is consumed in the different modes.

RE: sleep mode in nrf51822

xtting — Mon, 04 Jan 2016 00:32:38 GMT

app_trace_init(); timers_init(); buttons_leds_init(&erase_bonds); ble_stack_init(); You can see all these in main function, what you need to see is advertising_init() here.

And many MACROs like these:

#define APP_ADV_TIMEOUT_IN_SECONDS      10

RE: sleep mode in nrf51822

rushin — Sun, 03 Jan 2016 11:39:20 GMT

sorry i can't understand xxx_init function

RE: sleep mode in nrf51822

xtting — Sun, 03 Jan 2016 01:44:59 GMT

hello,

when ADV, the time out timer is defined automatically when you do the adv_init. You need don't add another timer to do this.

I advise you go deep into the xxx_init function. And you can see many MACROs in main.c in each demo, there's many time_out define.

RE: sleep mode in nrf51822

rushin — Sat, 02 Jan 2016 14:14:48 GMT

In BLE uart application. i also find function for sleep mode

 static void sleep_mode_enter(void)
    {
        uint32_t err_code = bsp_indication_set(BSP_INDICATE_IDLE);
        APP_ERROR_CHECK(err_code);
    
        // Prepare wakeup buttons.
        err_code = bsp_btn_ble_sleep_mode_prepare();
        APP_ERROR_CHECK(err_code);
    
        // Go to system-off mode (this function will not return; wakeup will cause a reset).
        err_code = sd_power_system_off();
        APP_ERROR_CHECK(err_code);
    }

i think i can use it

RE: sleep mode in nrf51822

rushin — Sat, 02 Jan 2016 13:16:31 GMT

hello there link text .in this timer example. they used __WFE(); for sleep mode. can i use timer and __WFE(); with advertising ??

RE: sleep mode in nrf51822

rushin — Sat, 02 Jan 2016 09:33:13 GMT

can we add time? like after 5 s nrf51822 goes into sleep mode

RE: sleep mode in nrf51822

xtting — Sat, 02 Jan 2016 01:00:53 GMT

you can see it in most demo.

I can tell you most of this operation occur is when the ADV (fast ADV / Slow ADV / direct ADV, etc.) time out. So you can find it in the adv time out call back function. And slow ADV is always the last ADv type, then go to sleep. You can find what you want by search BLE_ADV_EVT_IDLE.

case BLE_ADV_MODE_SLOW:
                    m_adv_evt = BLE_ADV_EVT_IDLE;
                    LOG("[ADV]: Timed out from slow advertising, stopping advertising.\r\n");
                    if (m_evt_handler != NULL)
                    {
                        m_evt_handler(m_adv_evt);
                    }
                    break;


static void on_adv_evt(ble_adv_evt_t ble_adv_evt)
{
    uint32_t err_code;

    switch (ble_adv_evt)
    {
        case BLE_ADV_EVT_FAST:
            err_code = bsp_indication_set(BSP_INDICATE_ADVERTISING);
            APP_ERROR_CHECK(err_code);
            break;
        case BLE_ADV_EVT_IDLE:
            sleep_mode_enter();
            break;
        default:
            break;
    }
}