Implementing UART communication

Hi Alex,

> RECEIVING: rcv_buffer up to 255 bytes.

> TRANSMITTING: AFTER receiving and checking all rcv_buffer , i send transmit

> buffer ( up to 255 bytes).

>

> * delay between 2 incoming buffers is 100ms.

This can be achieved with baud rates as low as 38400.

> ** RECEIVING must interrupt my running application ,after transmitting i must return

> to my interrupted state.

This is typical ;-)

> It is important to choose fastest communication.

It's not clear to me what you mean by this ... but you should have little difficulty

handling the scenario you describe ... even with a very modest cpu clock.

What is your question?

Regards,

--Scott

Hi Scott.

First of all thanks for the tips.

I will be happy to get some Nios II IDE code example for same scenario.

I want to understand how to use UART interrupts and to apply it in my application.

Regards .

Alex

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originally posted by burdalex@Nov 25 2005, 01:11 PM

hi scott.

first of all thanks for the tips.

i will be happy to get some nios ii ide code example for same scenario.

i want to understand how to use uart interrupts and to apply it in my application.

regards .

alex

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Altera provide a driver for the UART, you don&#39;t need to worry about handling the interrupts from the UART. I suggest you either look at the hello world example or read the Nios II Software Developers Handbook.

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originally posted by rugbybloke+nov 26 2005, 02:24 am--><div class='quotetop'>quote (rugbybloke @ nov 26 2005, 02:24 am)</div>

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<!--quotebegin-burdalex@Nov 25 2005, 01:11 PM

hi scott.

first of all thanks for the tips.

i will be happy to get some nios ii ide code example for same scenario.

i want to understand how to use uart interrupts and to apply it in my application.

regards .

alex

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=11162)

--- quote end ---

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Altera provide a driver for the UART, you don&#39;t need to worry about handling the interrupts from the UART. I suggest you either look at the hello world example or read the Nios II Software Developers Handbook.

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=11164)</div>

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I have the same question of how to receive and transmit data using UART interrupt .I have read the Nios II Software Developers Handbook and driver for the UART, but I don&#39;t know how to use the API function of HAL,

for example:

1,how to declare the "fd" parameter of alt_avalon_uart_read (alt_fd* fd, char* ptr, int len)?

2,Can I use the alt_avalon_uart_read (alt_fd* fd, char* ptr, int len) directly or use it throuth some other system function sush as read()?

can you give me some example about it ?

my Email is: lvguihua23@126.com