Synchronizing systems on a chip using time synchronization messages

An electronic eyewear device comprising:

• systems on a chip (SoCs) having independent time bases, the SoCs including at least a first SoC and a second SoC physically separated in physically separate regions of the electronic eyewear device;
• an inter-SoC interface that connects the SoCs;
• and
• a computer readable medium comprising instructions stored thereon that are executable by the second SoC to cause the second SoC to perform operations for synchronizing independent time bases of the first SoC and the second SoC, the operations performed by the second SoC including:
• sharing data amongst the SoCs over the inter-SoC interface;
• and
• synchronizing data processing of the shared data by the SoCs by periodically performing operations comprising:
• receiving a time synchronization message from the first SoC over the inter-SoC interface;
• recording a local timestamp of receipt of the time synchronization message;
• receiving a master timestamp corresponding to a timestamp recorded by the first SoC corresponding to the time of sending the time synchronization message by the first SoC;
• calculating a time offset between the local timestamp and the master timestamp;
• and
• aligning the time bases of the first SoC and the second SoC using the calculated time offset.

A non-transitory computer readable medium comprising instructions stored thereon that are executable by a system on a chip (SoC) of an electronic eyewear device to cause the SoC to perform operations for synchronizing independent time bases of SoCs including at least a first SoC and a second SoC of the electronic eyewear device that are connected by an inter-SoC interface of the electronic eyewear device, the operations including:

• sharing data amongst the SoCs over the inter-SoC interface, wherein the SoCs are physically separated in physically separate regions of the electronic eyewear device, the SoCs including at least a first SoC and a second SoC;
• and
• synchronizing data processing of the shared data by the SoCs by periodically performing operations comprising:
• the second SoC receiving a time synchronization message from the first SoC over the inter-SoC interface;
• the second SoC recording a local timestamp of receipt of the time synchronization message;
• the second SoC receiving a master timestamp corresponding to a timestamp recorded by the first SoC corresponding to the time of sending the time synchronization message by the first SoC;
• the second SoC calculating a time offset between the local timestamp and the master timestamp;
• and
• aligning the time bases of the first SoC and the second SoC using the calculated time offset.