18. Transmitter_receiver_9bit

18.1. Function description:

Connect two groups of USARTs according to the connection mode,Configure wordlength to 9 bits, send data through USART_TX, USART1_RX receives data and stores it in USART1_buffer.Similarly, USART1_TX sends data, USART_RX receives data and stores it in USART_buffer.

18.2. Test result:

If the data written to USARTn TX is same to data read from USARTm RX, and the data written to USARTm TX is same to data read from USARTn RX, print “pass”, if not, print “fail”.

18.3. IO connection:

PAD	PAD
pad_USARTn_TX	pad_USART1_RX
pad_USARTn_RX	pad_USART1_TX

Note

The ‘m’ and ‘n’ in “usartm” and “usartn” indicate the peripheral number.