from the user's application.
The default ble-nrf51822 library does not provide a mechanism for the user
application to define size of the GATT attribute table size. It is important as
over 1.5K of sram is statically alllocated for SD.
S110 builds contian a conditional compilation option that compiles out
GattClient functionality, thereby saving several hundred bytes of unecessary
memory overhead.
Reduced GATT table size by 1K. 768 bytes is sufficient to hold the basic
micro:bit BLE services (Device Information, DFU, event service). The
additional 1K normally held by SoftDevice can then be reused for application
heap.
Finish the implementation of the new function getAddressesFromBondTable() in
SecurityManager that returns a table with a list of addresses from the peers
in the bond table.
The module is updated to comply with the changes to BLE API regarding correct
shutdown functionality. The following changes are introduced to ble-nrf51822:
* Calls to the old static function shutdown in Gap, GattClient, GattServer and
SecurityManager are removed.
* The cleanup function in Gap, GattClient, GattServer and SecurityManager is
renamed to `reset()` and made public.
* The static references inside nRF5xGap, nRF5xGattClient, nRF5xGattServer and
nRF5xSecurityManager to objects of their own class are moved to nRF5xn.
* The static getInstance accessors in nRF5xGap, nRF5xGattClient,
nRF5xGattServer and nRF5xSecurityManager are removed and their functionality is
moved to the implemented virtual accessors in nRF5xn i.e. getGap(),
getGattClient, etc.
* A static function Instance is added to nRF5xn class to make the transport
object accessible across the module.
Previously the concepts of initLength and lenth were clearly separated.
However, this was at the cost of registering all characteristics in the
SoftDevice as having variable length. Clearly, this is not the desired
behaviour. Therefore, an additional field '_hasVariableLen' is added to the
GattAttribute to address the problem. Also, the GattAttribute and
GattCharacteristic constructors have been modified to take a boolean that
sets '_hasVariableLen'.
**NOTE:** Changes to this module will cause projects to fail the build stage
if changes to the BLE_API are not published first.
In previous versions of BLE_API the GattCharacteristic initLen parameter is
named minLen as well. When the characteristic is committed to the SoftDevice
the value of initial length is also used as the minimum length of the
characteristic value. Furthermore, the test (max_length == min_length) is used
to determine whether the characteristic value has variable length. This is
slightly confusing and also causes problems if the user wishes to use a
characteristic with variable length but the initial lenght is equal to max
length.
To solve this problem the characteristic is now always committed to the
SoftDevice as variable. Furthermore, the API only maintains the current lenght
and the max length i.e. the field initialLen in the GattAttribute is removed.
In nRF5xGattServer all calls to getInitialLength() are removed and replaced
with getLength().
*NOTES:*
* This change requires updates to ble.
* Ideally we would like the characteristics to be declared as 'variable' only
when necessary, but this requires changing the signature of the
GattCharacteristic and GattAttribute constructors. Therefore, it will be part
of a separate pull request.
Use const references for passing characteristic discovery callbacks
Fix a bug in btle_discovery.cpp, the discovered descriptors were captured
by value instead of reference.
Fix terminate discovery (the replacement of the discovery was done after
the call to terminate).
When searching for a running discovery, dismiss results where the
characteristic is equal to the default characteristic value
Add Discovery::operator!=
Add support of DiscoveredCharacteristic last handle in the characteristic
discovery process
S110 compatibility is already present, but this patch adds proper handling
of observer/central related features:
* Gap::startScan will return BLE_ERRROR_NOT_IMPLEMENTED (instead of
PARAM_OUT_OF_RANGE)
* nRF5xGattClient uses the default GattClient implementation when S110 is
in use. All if its methods return NOT_IMPLEMENTED.
Example: for an application that acts as both a central and a peripheral,
using S110 will make the ble.gap().startScan() call return
BLE_ERROR_NOT_IMPLEMENTED, and advertisement features will continue
running normally.
In addition, with GCC, this patch will free 344 bytes of RAM and 2504
bytes of flash.
Instead of relying on build macros to know which oscillator we're
supposedly using, check the value of LFCLKSRC register. This way, we can
trust mbed's init code to fallback on the internal clock if the user
specified a wrong target.
This change, along with the mbed patch that selects clock source
dynamically, will allow lots of application to still run and provide
FOTA, when the wrong Nordic platform is specified.
Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Joe Finney