OTA bootloader service description

AN4486

12/29

DocID026293 Rev 2

2.3.2

OTA Service Manager

The OTA Service Manager acts as a standalone OTA bootloader providing the BLE OTA

service to any BLE application which wants to use bootloader features without the need to

include any OTA capability.

The OTA Service Manager application IAR projects + header & source files are provided

within the BlueNRG SW package on Project folder, as follows:

1.

OTA_ServiceManager\EWARM\OTA_ServiceManager.eww for the BlueNRG device.

2.

OTA_ServiceManager\EWARM_BlueNRG-MS\OTA_ServiceManager.eww for the

BlueNRG-MS device.

The OTA Service Manager application uses the platform LEDs as follows:

Table 4: LEDs for BlueNRG OTA Service Manager

BlueNRG, BlueNRG-MS development

platforms

BlueNRG, BlueNRG-MS USB dongles

DL1 (yellow) is always blinking (1)

D2 (red) is always blinking (1)

DL2 (orange) is ON during OTA upgrade

D3 (orange) is ON during OTA upgrade

Notes:

2.3.3

New BLE application

A BLE application which wants to use the OTA Service Manager capability is only required

to address these basic steps:

1.

On EWARM workspace, add ST_OTA_BASIC_APPLICATION preprocessor & linker

option

2.

On EWARM workspace, use the reference stm32l1xx_flash.icf linker file for matching

the Flash layout described in Figure 4: "BLE OTA Service Manager Flash layout" (it is

provided within the BlueNRG SW package, demo applications folder)

3.

On EWARM workspace, add reference to file btl.c and add path related to btl.h file

4.

On BLE user application, include the header file btl.h

5.

Add some user code for allowing BLE application to launch the OTA Service Manager

application. A simple button could be used for controlling the call to

Switch_To_OTA_Service_Manager_Application (this API is provided within btl.c file).

Note: When using the OTA Service Manager, the BLE application does not need to include

any OTA bootloader service. Also, the application can always be placed at fixed base

address 0x08006200. The related vector table base offset 0x6800 is defined within file

btl.h, as follows:

VECTOR_TABLE_BASE_DFU_OFFSET +

VECTOR_TABLE_BASE_RESET_MANAGER_OFFSET +

VECTOR_TABLE_BASE_ADDRESS_OTA_BASIC_APP

where:

VECTOR_TABLE_BASE_DFU_OFFSET = 0x3000 (DFU size).

VECTOR_TABLE_BASE_RESET_MANAGER_OFFSET = 0x800 (Reset Manager size).

VECTOR_TABLE_BASE_ADDRESS_OTA_BASIC_APP = 0x3000 (OTA Service Manager

size).