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}

if(apptimer_timeout_flag)//disable PA

{

apptimer_timeout_flag=0;

nrf_gpio_pin_clear(PIN_5518CTR);

}

power_manage();

}

We have modified the source code ble_radio_notification.c that provided by nRF51 SDK, to

achieve this purpose.

The modified ble_radio_notification.c is located in the directly

\nRF51_SDK_9.0.0_2e23562_5518PA_DEMO\components\ble\ble_radio_notification of source code

package we provided.

By add the ble_radio_notification.c file to the project, the Radio Notify() function can be used to

detect if RF is active, below is the key code for the usage of Radio Notify() function:

bool m_radio_active_flag=0;

void ble_radio_active_evt(bool radio_active)

{

m_radio_active_flag=1;

}

static void radio_notification_open_init(void)

{

uint32_t err_code;

err_code = ble_radio_notification_init(NRF_APP_PRIORITY_LOW,

NRF_RADIO_NOTIFICATION_DISTANCE_800US,