5. Hw_flow_ctl

5.1. Function description:

This demo show USARTn with USARTm in hardware flow control mode. When CTSE=1, the status bit (CTS_RISE_FLAG and CTS_FALL_FLAG) is automatically set by hardware as soon as the CTS input toggles. It indicates when the receiver becomes ready or not ready for communication.

5.2. 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”.

5.3. IO connection:

PAD	PAD
pad_USARTn_TX	pad_USARTm_RX
pad_USARTn_RX	pad_USARTm_TX
pad_USARTn_CTS	pad_USARTm_RTS
pad_USARTn_RTS	pad_USARTm_CTS

Note

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