usart-sr-标签分类-2025-12-10 16:49
必应
usart_sr usart_dr,
usart1- sr usart1- dr,
usart2- sr usart2- dr,
usart3- sr usart3- dr,
usart3- sr & 1 5,
usart_deinit usart1,
usart1- sr & usart_sr_rxne,
usart_deinit usart2,
how does usart work,
usart_receivedata usart1,
usart_receivedata usart2,
usart_senddata usart1 a