[
https://issues.apache.org/jira/browse/MYNEWT-564?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Christopher Collins resolved MYNEWT-564.
----------------------------------------
Resolution: Fixed
> BLE Host - Allow byte buf for adv / rsp data
> --------------------------------------------
>
> Key: MYNEWT-564
> URL: https://issues.apache.org/jira/browse/MYNEWT-564
> Project: Mynewt
> Issue Type: Bug
> Components: Nimble
> Reporter: Christopher Collins
> Assignee: Christopher Collins
> Fix For: v1_0_0_beta2
>
>
> The current API is high-level and is relatively easy to use, but
> requires a lot of code space and RAM. I think a function which just
> takes a raw byte buffer (or mbuf) would be much better. Then, there
> could be a helper function which converts an instance of `struct
> ble_hs_adv_fields` to a raw byte buffer.
> A simple peripheral that always advertises the same data shouldn't be
> burdened with the ble_hs_adv_fields API.
> There is actually a rationale as to why the API is the way it is today.
> There are a few fields in the advertisement data that the host can be
> configured to fill in automatically:
> * Flags (contains advertising type).
> * TX Power Level
> I figured it would be safer if these values got calculated when
> advertising is initiated. This is impractical if the host were handed a
> byte buffer rather than a series of fields.
> Under the new proposal, the application would need to specify the
> correct advertising type when building the byte buffer, and the tx power
> level would be queried before the advertising procedure is actually
> started. I don't think this will be a problem in practice, and I think
> the benefits in code size and RAM usage outweigh the API burden.
> New functions:
> {noformat}
> int ble_gap_adv_set_data(const uint8_t *data, int data_len);
> int ble_gap_adv_rsp_set_data(const uint8_t *data, int data_len);
> {noformat}
> Additional API change:
> The flags field is no longer auto-calculated. Instead, the application has
> to specify the exact value to send over the air. For example:
> *OLD API*
> {noformat}
> fields.flags_is_present = 1;
> fields.flags = 0;
> {noformat}
> *NEW API*
> {noformat}
> fields.flags = BLE_HS_ADV_F_DISC_GEN |
> BLE_HS_ADV_F_BREDR_UNSUP;
> {noformat}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
