Honored ContributorHi again,
Adding an Avalon custom hardware and its software driver (either HAL or not) is easy and straightforward. Having said that I mean the standard Nios II IDE project_syslib/system_description/system.h way. Building a custom system that runs uClinux is also not an issue but haw can I use my Avalon hardware under uClinux? Thanks for any suggestions, Piotr.
Honored ContributorI guess it depends if you want to build a proper Linux driver for your avalon hardware. The basic IRQ and base address for your hardware should appear within the
<project>/build/include/nios2_system.h file in your kernel project directory. If you're not interested in building a driver, then the hardware can be accessed from a regular Linux application as it would be in a non-HAL standalone application. If you're interested in building a driver, I think there was a thread in this forum to help you get started...Honored ContributorHonored ContributorFair enough, here's a code example that pokes around a hardware timer from a user application:
include Rules.mak
ECLIPSE_WORKSPACE := /cygdrive/c/altera/kits/nios2/bin/eclipse/workspace
KERNEL_PROJECT := uKit_kernel_default
BUILDDIR := $(ECLIPSE_WORKSPACE)/$(KERNEL_PROJECT)/build/include
CFLAGS += -O0 -g -I$(BUILDDIR)
all: timer.exe timer.gdb#include <errno.h># include <stdio.h># include "nios2_system.h"
int
main (int argc, char* argv)
{
int i;
np_timer *timer;
timer = na_timer0;
i = (timer->np_timerperiodh << 16) | timer->np_timerperiodl;
printf ("timer period valud is %i \n", i);
timer->np_timersnapl = 0;
i = (timer->np_timersnaph << 16) | timer->np_timersnapl;
printf ("The current timer value is %i\n", i);
return 0;
}This is OK now. Thank you for your help Ken.
Regards, Piotr.Honored ContributorHi i compiled this file and tried to start it under uClinux but i get allways this error message:
# cd /bin# timer BINFMT_FLAT: bad magic/rev <0x3000000, need 0x4> BINFMT_FLAT: bad magic/rev <0x3000000, need 0x4> MZ>: not found# Does anybody know something about this message?Honored ContributorCan I see your Makefile?
Honored Contributorhi ken,
<div class='quotetop'>QUOTE </div> --- Quote Start --- np_timer *timer;[/b] --- Quote End --- in timer.c Where is np_timer defined?Honored ContributorIt's defined in the linux kernel...
.../linux-2.6.x/include/asm/nios2nommu/timer_struct.hHonored ContributorHi Ken:
where are the other hardware_structs? For example lan91c111, dma,....... You have make the API?Honored ContributorAll of that would be in the kernel includes directory...
[SOPC Builder]$ cd $KERNEL_PLUGIN/linux-2.6.x/include At least, that's where I'd expect to find them. I haven't checked in awhile.
