Using IORD - IOWR

Altera_Forum · ‎07-12-2006

Hi,

I want to write down some value to my control register. Here are the steps :

1. Define component's macros which are done in SOPC Builder

# define MY_IORD(base , offset) IORD(base , offset)# define MY_IOWR(base , offset , data) IOWR(base , offset , data)

2. Use in NIOS IDE

MY_IOWR(base , 0 , 0x1);

return_value = MY_IORD(base , 0);

--------------------------

After execution , I learnt that my return_value is 0 instead of 1.

Why do I get this error ?

My reference : "n2sw_nii5v2.pdf" , pg 131/242

Thanks in advance,

Quan

Altera_Forum · ‎07-12-2006

What are you writing to? Memory? Custom periperhal?

Altera_Forum · ‎07-12-2006

set PIO DIR ?

# define inport(base) IORD(base, 0) # define outport(base, data) IOWR(base, 0, data)# define get_pio_dir(base) IORD(base, 1) # define set_pio_dir(base, data) IOWR(base, 1, data)

Altera_Forum · ‎07-15-2006

Hi Slacker ,

I have a component and try to control it through the NIOS C program. I have been trying to write to a control register that I defined for my component.

For ex : I have a counter. Here are the files I have to make :

(1) Hardware files

counter_task_logic.v

counter_regs.v

counter_avalon_interface.v

(2) Software files

counter_regs.h (/inc)

counter_routines.h (/HAL/inc)

counter_routines.c (/HAL/src)

(3) Test Hardware file

counter_test.c

Then I packaged my counter to SOPC with (1) and (2) and used NIOS IDE to create program to check my counter.

I tried to follow the instruction in the reference I gave you some days ago but it seemed to me that it didn't work as I expected.

Could you tell me where my problem is ?

Thanks,

Quan

Altera_Forum · ‎07-15-2006

Hi makasete,

Sorry , It is not very clear about your idea.

Would you please tell me about it more clearly?

Thank you so much,

Quan

Altera_Forum · ‎07-15-2006

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originally posted by quan1328@Jul 14 2006, 05:43 PM

could you tell me where my problem is ?

thanks,

quan

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Perhaps, an error in your hardware design? Why don't you run a simulation and see what's happening in your hardware?

Other than that, I don't have enough visibility into what you're trying to do to help you any further.

Good luck!

- slacker