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I've compiled the UART_Rx.cywrk example in the CY8CKIT-001 development kit and have been unable to get it working while sending characters over RS232 using 'HyperTerminal'. I've confirmed the UART generates a RX interrupt upon receiving a character (by bringing the signal out to a I/O pin) but the ISR routine never gets called. Is this a known problem? Any ideas what might be causing the problem?? Thanks.