Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Holtek/HT32F125x/USART/USART_LSR#0x0
USART_LSR
RFDR
OEI
PEI
FEI
BII
TXFEMPT
TXEMPT
ERRRX
Reserved.
https://github.com/cmsis-svd/cmsis-svd-data