Symbol: US_CR_STPBRK
sys/arch/arm/at91/at91usart.c
527
at91usart_writereg(sc, US_CR, onoff ? US_CR_STTBRK : US_CR_STPBRK);
sys/arch/arm/at91/at91usartreg.h
166
| US_CR_STPBRK); \