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Execution context

UM1770

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DocID026385 Rev 2

Execution context

The BlueNRG host profiles framework implements a single task model for execution. The

entire processing takes place in the ISR context and the main thread context. The execution

context is a while(1) loop.

The following functions are processed in this loop:

HCI_Process(): it performs the processing of any pending events read. It is defined on

file hci.c (ACI Framework);

Profile_Process(): it sends the commands during the initialization or pairing process

and updates the main profile state machine.It is defined on file profile.c (main profile

file);

Profile specific state machine: it is called for checking current main profile and profile

state, substate and performing related actions and consequent status updates

(functions *_StateMachine(void) on each specific profile);

Application state machine: it performs application-specific handling (sending data to

profiles, enabling advertising, displaying to the user, etc.). An example of such function

is the Host_Profile_Test_Application() defined within the profiles_test_application.c file

(test application for profile PTS validation).

The PTS profile validation application (profiles_test_application.c) provides an example of

such processing.

The BlueNRG events are notified to the main profile application (profile.c) through the

HCI_Event_CB() callback which performs the required actions based on main profile state

and substate. Further the HCI_Event_CB() function notifies the BlueNRG events to a

specific profile by calling the profile callback function * _Event_Handler(). This function is

called with the following instruction:

gMainProfileCtxt.bleProfileApplNotifyFunc(appNotifEvt,1,&appNotifStatus);

Each profile registers its BlueNRG event handler function (* _Event_Handler()) through the

profile *_Init() function.

Following are more details about the main profile framework (profile.c) key functions:

•

BLE_Profile_Init(): It initializes the main profile.

•

BLE_Profiles_Evt_Notify_Cb(): it is the main profile callback function which is called by

each profile to notify the profile specific events to the main profile application. Based on

such events, main profile application can decide which actions to take in order to

handle the specific profile events. This function is provided to each profile when the

related *_Init() API is called.

•

BLE_Profile_Register_Profile(): it allows registration of each profile callback; it is called

within the profile initialization function named: *_Init() function.

Profile specific example: heart rate profile

•

Heart rate profile header file: heart_rate.h file;

•

Heart rate profile initialization function:HRProfile_Init(). This function performs the

following operations:

•

Set the main profile callback function for notifying profile specific events to the main

profile application;

•

Set the heart rate profile HRProfile_Rx_Event_Handler() callback function;

•

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