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Previously the FastPeriodDivisor value was introduced to the model publication struct. Based on the way it was grouped it seems the intention was to fit it within the same octet as other bit fields, but it actually makes the octet overflow by one bit. This ends up creating another u8_t variable which in turn adds 24 bits of padding after it. To keep the size of the struct as compact as possible, group the flag together with the key index, since that only requires 12 bits. Some care is needed here, since the mesh stack does have special internal key index values that require more than 12 bits such as BLE_MESH_KEY_UNUSED and BLE_MESH_KEY_DEV. In this case restricting ourselves to 12 bits is fine since the value in the model publication struct follows 1:1 the value received in the Config Model Publication Set message, and there the parameter is defined to be exactly 12 bits. |
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core | ||
models | ||
esp_ble_mesh_defs.h |