CC2652RB: Dynamic Connection Interval

Hi,

I am using LP-CC2652R1 as BLE master and CC2652RB as BLE slave device and sdk_4_20_00_35 is the SDK version.

I am trying to change BLE connection interval between two devices based on application data rate.

The following are the connection interval parameters during initializing:  

Update Min Connection Interval  = 7.5ms

Update Max Connection Interval = 7.5ms

Slave latency = 0. 

I tried by updating the connection parameters from BLE slave device and checking GAP_UPDATE_LINK_PARAM_REQ_EVENT on BLE master but GAP_UPDATE_LINK_PARAM_REQ_EVENT is not getting called by setting the "Parameter Updates Request Decision" to "Pass to app"

How can i update the value of generated macros(INIT_PHYPARAM_MIN_CONN_INT and INIT_PHYPARAM_MAX_CONN_INT) on BLE master to change the connection interval dynamically??

Any API is used to update the connection interval parameters?

Thanks in advance.

Regards,

Saathwik