2011-05-26 00:56:42 problem with serial port

Amitvikram M (INDIA)

Message: 100843

I have problem with serial port response time. My requirement is as soon as I recieve the data from serial data, I have to send the response through serial port within 2 ms. But whereas am getting timing of 20 ms. To test the response I am doin the following:

while(1) {

read(DeviceID,strx,1);

write(DeviceID,strx,1);

}

I monitored the RX and TX lines of UART on CRO. The time gap between between reception and transmission is 20 ms!!!. How do I improve this timing?

Thanks in advance.

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2011-05-26 00:58:53 Re: problem with serial port

Mike Frysinger (UNITED STATES)

Message: 100844

please run `make bugreport` and post the tarball as an attachment

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