LAUNCHXL-CC2650: ADC Notification Bluetooth Simple Peripheral

Hello, 

I am working with the code of simple peripheral and I would like to send every 0.5 sec value of an ADC1 as a student.

I succed to send notification in characteristic 4 of a value that increase every 1 sec by completing this part in simple_peripheral.c .

But I didn't find drivers and don't know how to complete the code for ADC to pool the data.

https://dev.ti.com/tirex/explore/content/simplelink_academy_cc2640r2sdk_4_30_01_00/modules/blestack/ble_01_custom_profile/ble_01_custom_profile.html#example-service-generator

this link helped to send data periodically but now I want the data to be what I collect in ADC.

Thank you