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Altera_Forum
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21 years ago

Altera Avalon Uart performance problem

I have been testing the Altera Avalon Uart by sending data to it from a different machine. A program on the other machine sends 16kB of known data out its serial port which connects to the serial ...
Altera_Forum's avatar
Altera_Forum
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21 years ago

wentao,

Sorry for my misunderstanding. I could try the JTAG uart to see if it performs better just for reference. But, I'm not sure how to interface with this port under the Cygwin environment, except for using nios2-terminal. I need to be able to have my application run and use it as a serial port.

In answering your second question:

The UART I tried is called a Cal_Avalon_Uart. It was designed by an Altera FAE. It is basically identical to the standard Altera_Avalon_Uart, except that it contains FIFO support. I'm working with the FAE on the hardware side of things to ensure the FIFO's are working. But, he has not used it under Linux, so I'm pursing the software side of things on this forum to see if there is a general limitation of the serial drivers under uClinux on the Nios II. The specification for the Cal_Avalon_Uart states that it is software compatible with the original uart, but one never knows...

Thanks for your continued help.