Hi,
I'm interfacing a GPS skynav SKM53 which uses UART with MCB 1700 board( onboard LPC1768 microcontroller). I have the transmitter pin of GPS connected to P2.1 (configured as UART1 Rx). Though, i can see the data in the RBR (Receive Buffer) register but I don't see the UART_IRQ handler being invoked neither are any flags being set(like LSR,RLS or RDA)
I have tested the IRQ handler by interfacing with PC (COM Port connected using RS232 cable) and it works perfectly. I use the same function for interfacing on peripheral pins of UART, it doesn't get invoked. Is there any other configuration, I need to do so as to invoke IRQ handler when data is seen on the peripheral??? Please advise.