QNX 6.3 x86 PC104 Driver

QNX DEVELOPERS Realtime and Embedded
1

Hello,

I’m new in QNX developing and want to write a driver for a digital-IO Modul based on the PC104 technology. I researched the internet for the PC104-DIO-48 driver and found the Universal Driver Documentation on Diamondsystems.com. Is this the right way or can you give me any other links?

Greetings

2

Lucky for you these are probably the easier driver to write. I don’t know about the Universal Driver Documentation, but the chip on these board is usually a 8255, so look up the specs of 8255 and you shoudl be ok

3

Hey mario,
thank you for your help, i looked up the datasheet of the 8255, read about the memory allocation and found suddenly out, that i wrote the reserved memory. I changed the memory allocation and now i can write on the IO-Module. Here you will find my sourcecode:

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/neutrino.h>
#include <pthread.h>
#include <time.h>
#include <hw/inout.h>
#include <sys/mman.h>
#include <inttypes.h>

int main(int argc, char *argv[])
{
//Depending on the jumper positions
int BaseAdress = 0x350;
int ret;
uintptr_t port_ctl, port_data;

ret = ThreadCtl(_NTO_TCTL_IO, 0);
if (ret==-1)
{
	printf("NO PERMISSION\n");
	printf ("ThreadCtl-ret = %d\n",ret);
}

/*

  • Setting the control-Reg
    /
    port_ctl = mmap_device_io(0x01, BaseAdress+3);
    if (port_ctl==MAP_DEVICE_FAILED)
    {
    printf(“mmap_ctl failure\n”);
    }
    out8 (port_ctl,0x89); // A: IN , B: OUT
    /

  • Defining IO-of the Ports
    */

    port_data = mmap_device_io(0x01, BaseAdress);
    if (port_data==MAP_DEVICE_FAILED)
    {
    printf(“mmap_data failure\n”);
    }

/*

  • Simple toggling of Port A
    */
    while(1)
    {
    sleep(2);
    printf(“Setze LED\n”);
    out8(port_data, 0xFF);

    sleep(2);
    printf(“Loesche LED\n”);
    out8(port_data, 0x00);
    }

return EXIT_SUCCESS;

}

Thanks

muhkuh

4

You got the hardware working, now you need to turn this into a driver ;-)

5

Hey mario!
On the embedded world 2006 in Nürnberg, Germany i was speaking with the official QNX-Support team, who told me, that i should not concetrate on writing a charakter driver, instead I should write a resource manager! so I search through the Neutrino programmers guide and found a source example! In this source example there is the framework descriped, and you only have to write the handlers! can you give me some informations about implementing the handlers?

have a nice day

yours muhkuh

6

Hi!

I’m new… For my work, they asked me to do a driver for the TS-5600 PC/104 :
http://www.embeddedarm.com/epc/ts5600-spec-h.html

I have to develop a driver for the analogic I/O and I really don’t know how to begin it … I have Momentix & SP2 installed, I also instaled the DDK, but I don’t know how to do the driver… Can somebody help please :blush: ?

Thanks :confused:

7

Hey guy,

you have to write a resource manager, then you can access the io modul by low level instructions ala open close read write! when you pack it into a library you can create your own commands ala set byte set bit and so on!

yours muhkuh

8

hi muh,
I am new into qnx,
how are you mapping open, read & write into the driver,I dont understand the concept of resource manager I have done character drivers that in linux kernel space, this user level driver resource manger i dont understand.

Can you give me any document or url saying how you have done your driver or just put the code on to here,

  1. How API open,read,write& close are mapped
    2.How some code is recognized as driver
    3.Is there any difference in compiling a driver & a normal code
9

1 . Look in QNX documentation. Search for the chapter on Writing a resource manager
2 - 3. As far as QNX is concern there is no real difference between a driver and normal code.