Which port caused interrupt

[Mike M.]

If I have 2 serial ports (one HW, one SW) and I am using the RDA interrupt, how can I tell which port caused the interrupt?
I searched the archives but all I got were people asking how to use more than one port. I can do that, I just want to be able to tell which port to read from when the interrupt comes in.

Thanks,
Mike
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Original Post ID: 1437

[PCM programmer]

:=If I have 2 serial ports (one HW, one SW) and I am using the RDA interrupt, how can I tell which port caused the interrupt?
:=I searched the archives but all I got were people asking how to use more than one port. I can do that, I just want to be able to tell which port to read from when the interrupt comes in.

INT_RDA is only used by the hardware USART. It's not
used by the software USART.

You can use INT_EXT with the software USART, to get a
receive interrupt. Set the edge to H_TO_L, then use
getc() to get the character when you're inside the INT_EXT isr.

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This message was ported from CCS's old forum
Original Post ID: 1440