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Altera_Forum's avatar
Altera_Forum
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21 years ago

UART ISR

Has Anyone implemented ISRs with AVALON UART? I'm trying to implement an ISR using the RRDY Interrupt bit in the STATUS register but it seems not work... has anyone an idea? i past a...
Altera_Forum's avatar
Altera_Forum
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21 years ago

If you look in the directory altera\kits\nios2\components\altera_avalon_uart there is a driver for the UART, both interrupt driven and non-interrupt driven. I suspect that your problem is that the UART driver is automatically installed on your system, so it is handling the ISR. You will be able to tell by looking in alt_sys_init.c, but you should probably read chapter 4 and 5 of the Nios II Software Developers Handook to understand what alt_sys_init.c is first.