Solved
CubeMX 6.4 generate codes with a wrong statement about UART4 in STM32F303RC.
When set TX Pin Active Level Inversion to Enable, CubeMX generate a wrong statment:
LL_USART_SetRXPinLevel(UART4, UART_ADVFEATURE_RXINV_ENABLE);
When set TX Pin Active Level Inversion to Enable, CubeMX generate a wrong statment:
LL_USART_SetRXPinLevel(UART4, UART_ADVFEATURE_RXINV_ENABLE);
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