UART interrupt with HAL

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From the software side of things, have you checked system.h from your BSP?

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Yes, I checked system.h and everything is ok:

#define UART0_IRQ 3
# define UART0_IRQ_INTERRUPT_CONTROLLER_ID 0

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ALSO, in your isr register function you're telling it to use the 'isr_timer_0' callback rather than the defined 'isr_uart0' callback.

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I cut my code to prepare minimal example and it was copy-paste error ;) in my code I have proper callback.

I investigated this and I have problem as follows:

int main()
{
    alt_ic_isr_register(UART0_IRQ_INTERRUPT_CONTROLLER_ID, UART0_IRQ, isr_uart0, my_context, 0x0);
    alt_printf("Hello from main");
    while(1);
}
void isr_uart0(void* context)
{
    alt_printf("Hello from isr");
}

When printf from main is executed program go to isr_uart0 callback and go to alt_irq_handler from alt_irq_handler.c and there is endless loop and nothing is printed to uart.

For first printf:

alt_putchar is called -> then in alt_putchar code for direct drivers is executed and alt_driver_write() calls altera_avalon_uart_write(). Last point of this chain is isr_irq_handler which calls my callback in endless loop with no output to terminal.

I just want to get chars from terminal in isr but i think without using registers it is impossible.