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-rw-r--r--chip/stm32/registers.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/chip/stm32/registers.h b/chip/stm32/registers.h
index 4f79beb769..a8104114cf 100644
--- a/chip/stm32/registers.h
+++ b/chip/stm32/registers.h
@@ -224,6 +224,7 @@
#define STM32_USART_CR1_TXEIE (1 << 7)
#define STM32_USART_CR1_OVER8 (1 << 15)
#define STM32_USART_CR2(base) STM32_USART_REG(base, 0x04)
+#define STM32_USART_CR2_SWAP (1 << 15)
#define STM32_USART_CR3(base) STM32_USART_REG(base, 0x08)
#define STM32_USART_CR3_EIE (1 << 0)
#define STM32_USART_CR3_DMAR (1 << 6)