Prepare ble_app_example

Open SDK_Folder\projects\ble\ble_peripheral\, copy ble_app_template to the current directory, and rename it as ble_app_example. Rename the base name of .uvoptx and .uvprojx files in ble_app_example\Keil_5 as ble_app_example.

Double-click ble_app_example.uvprojx to open the project example in Keil. Click , and select Output in Options for Target ‘GR551x_SK’; enter ble_app_example in Name of Executable.

All groups of the ble_app_example project are available in the Project pane of Keil.

Groups of the ble_app_example project are mainly in two categories: SDK groups and User groups.

• SDK groups

  The SDK groups include gr_startup, gr_arch, gr_stack_lib, gr_drivers, gr_app_drivers, gr_libraries, gr_profiles, and external.

  

  Source files in the SDK groups are not required to be modified. Group descriptions are provided below:

  Table 7 SDK groups

  SDK Group Name	Description
  gr_startup	It contains the system boot file.
  gr_arch	It contains initialization configuration files and system interrupt implementation files for System Core and PMU.
  gr_stack_lib	It contains the GR551x SDK .lib file.
  gr_drivers	It contains drive source files of SoC peripherals. You can add hardware drives on demand.
  gr_app_drivers	It contains driver API source files, which are easy to use for application developers. You can add related application drivers on demand.
  gr_libraries	It contains open source files of common assistant software modules and peripheral drivers provided by in the SDK.
  gr_profiles	It contains source files of GATT Services/Service Clients. You can add necessary GATT source files for projects.
  external	It contains source files for third-party programs, such as FreeRTOS and SEGGER RTT. You can add third-party programs on demand.

• User groups

  User groups include user_callback, user_platform, and user_app.

  

  Functions for source files in User groups need to be implemented by developers. Group descriptions are provided below:

  Table 8 User groups

  User Group Name	Description
  user_callback	It contains BLE Stack callback functions, which are implemented in applications. For more information about callbacks, see Table 10.
  user_platform	It implements software and hardware resource setting and application initialization; you need to execute corresponding APIs on demand.
  user_app	It contains main() function entries, and other source files created by developers, which are used to configure runtime parameters of BLE Stack and execute event handlers of GATT Services/Service Clients.