nios UART RS232 Interrupt Mode settings

Hi,

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I understand(maybe I'm wrong) that it has two modes: Polling and Interrupt.

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You are right.

In polling mode, you have to read sometimes.

In interrupt mode, your interrupt routine handles the received character.

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In the Interrupt mode a driver should run automatically and store the data received in a circular way.

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Wrong, it only store ONE character (7 or 8 bits)

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I tried to write to the uart more than 1 byte[...]

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I have employ FIFOed UART from http://www.alterawiki.com/wiki/fifoed_avalon_uart, a little difficult to "plug" in SOPC.

OR Write your own buffer(s). It is not so difficult if you understood the principles.

Reduced drivers : I think they don't work in Interrupt Mode.

Hi,

Thanks a lot for your answer.

Are you sure about the abilty to recieve only one character even at Interrupt mode?

As I underatand,it has a 64 character buffer. What if then, the buffer is for?

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Are you sure about the abilty to recieve only one character even at Interrupt mode?

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yes, of course. But if you talk about FIFOed UART, it can receive only one character in interrupt mode, you can set a threshold.

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it [FIFOed UART ?] has a 64 character buffer. what if then, the buffer is for?

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I don't understand (translation problems ?)

First, if you employ The FIFOed UART (or an other component in QSYS), you have to regenerate the Qsys_component, of course.

The FIFOed UART will create special memories to store the received character, you will set the connections and size somewhere in QSYS (or SOPC). All are explained in the supplied document (maybe some adaptation have to be done).

If you write your own buffer : it is just a portion of memory that you index like FIFO (or what you want).