Did you select the Tx,Rx, cst,rts pins for the UART hardware using wiced_hal_puart_select_uart_pads() ?
BOOL32 wiced_hal_puart_select_uart_pads(UINT8 rxdPin, UINT8 txdPin, UINT8 ctsPin, UINT8 rtsPin);
How did you implement the flow control in your application? May I know the code flow?
Please attach the PUART code snippet here, if possible.
In my test, CYBT-413034 made compile error wiced_hal_puart_select_uart_pads
I changed my target UART control setting and I could use PUART flow control.