串口不是一次只能接收一个字节数据吗？为什么UARTCharGet函数返回的是一个4字节的数据？
//***************************************************************************** // //! Waits for a character from the specified port. //! //! \param ui32Base is the base address of the UART port. //! //! This function gets a character from the receive FIFO for the specified //! port. If there are no characters available, this function waits until a //! character is received before returning. //! //! \return Returns the character read from the specified port, cast as a //! \e int32_t. // //***************************************************************************** int32_t UARTCharGet(uint32_t ui32Base)
