wenkong_junshi/Examples/USART/Receiver_timeout

/*!
\file readme.txt
\brief description of the UASRT receiver timeout

\version 2017-02-10, V1.0.0, firmware for GD32F30x
\version 2018-10-10, V1.1.0, firmware for GD32F30x
\version 2018-12-25, V2.0.0, firmware for GD32F30x
\version 2020-09-30, V2.1.0, firmware for GD32F30x
*/

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This demo is based on the GD32307C-EVAL-V1.1 board, it shows how to use the USART
receiver timeout function.
Firstly, the USART sends "a usart receive timeout test example!" to the hyperterminal
and then loop waiting for receiving data from the hyperterminal. Then send data from the
hyperterminal to USART. If you did not send any data more than 3 seconds, USART will send
strings to the hyperterminal what you have sent and start a new round of waiting.