UART ISR

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originally posted by rugbybloke@Sep 2 2005, 11:24 AM

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altera_avalon_uart_init( seriale_int, seriale_int );

altera_avalon_uart_init( seriale_ext, seriale_ext );

altera_avalon_uart_init( seriale_fut, seriale_fut );

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Your problem is exactly as I diagnosed the lines above are initialising the driver for each of your UARTs so when the interrupt goes off for one of your UARTs the driver interrupt handler get&#39;s called and your ISR does not get a look in. There is no easy method to turn off the drivers at present you will have to remove the _INIT and _INSTANCE macros from alt_sys_init.c. The problem is that this is an auto generated file which will be re-generated under your feet.

You would be much better off using the provided driver and if you don&#39;t understand it step through it. Otherwise you will have to start from the alt_main entry point example which hands you complete control of the machine, with no drivers etc. This does have drawbacks though which are coverred in the manual.[/b]

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so there is no simply way to drive UART using low level functions such as

for the PIO component.

I have to understand how drive the ISR function using its APIs.... but

the only think I don&#39;t understand is HOW recall the IRQ using the auto

generated function by NIOS-II IDE.

thank you

shadowice