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modem status interrupt on DCD pin

saritha ABB

Hi All,

I need to generate an interrupt on DCD pin . How can I do this for null modem?
I shorted pins 1, 4 and 6 of the port and trying to toggle bit 0 in MCR register and enabled bit 3 in IER register, so that when state change happens it will trigger an interrupt.

But it is not generating any interrupt. I am new to these modem signals.

Can anyone send me sample ISR code or some idea how to generate an interrupt when state change happens on DCD pin for null modem.

We are using Ardence RTX tool which has its own APIs to transmit and receive data.

Thanks.

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