change the trigger level of the receiver FIFO in serial. ...

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Question by Sharon d.
Submitted on 6/28/2004
Related FAQ: comp.os.vxworks Frequently Asked Questions (FAQ) [LONG]
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change the trigger level of the receiver FIFO in serial. I'm working with pcPentium. I have serial which is 16550 compatible. I'm using the i8250Sio driver. I'm trying to change the trigger level of the receiver FIFO, so I will have interrupt every 4 byte coming in. and not every one byte coming in- The current situation. After the driver has been initialized I write to the IIR sysOutByte 0x3f8+2,0x41 //enable the fifo and change the trigger level to 4. I can see the FIFO is enable, still i get Interrupt every one byte coming in.

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