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Hi All,
I am writing a serial driver in C and would like to know what is realistic performance for such a beast. I basically have a ringbuffer to isolate the client from the internals of the driver. The ringbuffer structures (one for Tx and one for Rx) currently live in XDATA - is this going to kill me? The ISR has been declared as 'small' yet I am concious that each access to the ringbuffer structure is going out to XDATA - just how 'bad' is this?
With this rather simple setup I seem to drop the odd byte when running at 9.6K - I am simply sending a file via HyperTerminal into the micro and spitting it straight back out again. I have not completely ruled-out that the dropped bytes are not ocurring elsewhere, but I wanted to get the opinion of you learned folk on what is realistic for this kind of driver setup at the micro.
Thanks for any feedback.
Andy
Evaluate menu commands in ISR?