how to pass a pointer or array name to the interrupt function?

[Altera_Forum]

hi 

i register a interrupt in nios, and it works well  alt_ic_isr_register (NIOS_FT245_INTERFACE_0_IRQ_INTERRUPT_CONTROLLER_ID,  NIOS_FT245_INTERFACE_0_IRQ,  ft245_interrupt,  NULL,  NULL);  i want to pass a pointer or array name to the interrupt function ft245_interrupt, how can i do it?   thanks!

[Altera_Forum]

The documentation for the HAL functions are in altera_hal_api.pdf. Whatever you give to the context arg will be passed to your isr function. In your code this is the first NULL.

[Altera_Forum]

hi, i tried and it works! 

this is the code: void ft245_interrupt(alt_u32 precision_data[500]) { ..... }  int main() {  alt_u32 i=0;  alt_u32 precision_data_1[500]={0};  i=alt_irq_enabled();  alt_ic_isr_register (NIOS_FT245_INTERFACE_0_IRQ_INTERRUPT_CONTROLLER_ID,  NIOS_FT245_INTERFACE_0_IRQ,  ft245_interrupt,  precision_data_1,  NULL);    but the eclipse give me a warning Description Resource Path Location Type passing argument 3 of 'alt_ic_isr_register' from incompatible pointer type hello_world.c /project3 line 99 C/C++ Problem

[Altera_Forum]

The warning is because the type of your ISR function argument doesn't match what alt_ic_isr_register expects which is (void *). Try using (void *)precision_data_1 for that argument. 

 Edit: wrong argument.