https://docs.silabs.com/gecko-platform/latest/platform-emlib-efr32xg21/usart-init-i2s-type-def
Structusart Initi2s Typedef | EFR32XG21 | Platform | latest | Silicon Labs
EFR32XG21 - Structusart Initi2s Typedef in Platform (latest version) | Silicon Labs Docs
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