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.
If the controller GPIO line can detect 2.3V or above that voltage as logic level high, then following connection should work:
Controller GPS Module TxD RxD RxD TxD Gnd Gnd