Minor change which makes it possible to easily increase the size of the GATT attribute table size. If you try to add too many attributes then the latest ones just seem to disappear and aren't usable, the solution being to increase the size of the attribute table (which will also require more RAM for the SoftDevice, and less for application).
If you increase just the size of the table then the BLE stack will silently fail to load because BLEPeripheral isn't checking the status code from sd_ble_enable, which would report NRF_ERROR_NO_MEM if it was checked. This can be fixed by tweaking the MEMORY values in the linker script for the particular board.
With this PR's change the quick and easy way to allow more attributes is to simply edit the linker script for the target board and then update boards.txt to include -DBLE_GATTS_ATTR_TAB_SIZE.
A larger change (can add to this PR if preferred) would be to check the status code of sd_ble_enable and in case of NRF_ERROR_NO_MEM and debug being enabled, send to serial the suggested start of RAM to use in the linker script (sd_ble_enable replaces the value in app_ram_base with the suggested value).
sandeepmistry
commented
6 years ago
Minor change which makes it possible to easily increase the size of the GATT attribute table size. If you try to add too many attributes then the latest ones just seem to disappear and aren't usable, the solution being to increase the size of the attribute table (which will also require more RAM for the SoftDevice, and less for application).
If you increase just the size of the table then the BLE stack will silently fail to load because BLEPeripheral isn't checking the status code from
sd_ble_enable, which would reportNRF_ERROR_NO_MEMif it was checked. This can be fixed by tweaking theMEMORYvalues in the linker script for the particular board.With this PR's change the quick and easy way to allow more attributes is to simply edit the linker script for the target board and then update
boards.txtto include-DBLE_GATTS_ATTR_TAB_SIZE.A larger change (can add to this PR if preferred) would be to check the status code of
sd_ble_enableand in case ofNRF_ERROR_NO_MEMand debug being enabled, send to serial the suggested start of RAM to use in the linker script (sd_ble_enablereplaces the value inapp_ram_basewith the suggested value).