Subject:
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Re: Vector V2x Compass
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 13 Apr 1998 16:38:25 GMT
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Original-From:
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Alf Kuchenbuch <ALFK@EIKONstopspammers.E-TECHNIK.TU-MUENCHEN.DE>
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Reply-To:
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ALFK@EIKON.E-TECHNIK.TUsaynotospam-MUENCHEN.DE
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Viewed:
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1067 times
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Hi Armeen,
I have the same problem as you. I thought my HB was faulty or it doesn't
work with the 68hc11E processor I use or something.
So what I did was: I wrote a very simple IC-Routine. You have to load
this program with "load v2x.c" and call the routine with "v2x();"
It is very basic but it has one advantage: it works ;) !!
This is how to connect the V2X to HB (referring to Tom's diagram):
V2X HB
GND GND of SPI
+5V +5V of SPI
SS SCK/PD4 of SPI
P/C MISO/PD2 of SPI
SCLK MOSI/PD3 of SPI
SDO Digital input #7
Save this following program under v2x.c:
/* HB V2X-commands */
/* Alf Kuchenbuch 1/1998 */
/* SS=16=yellow; SCLK=8=green; PC=4=orange;;; SDO=blue=dig7 */
int head=0;
int v2x()
{
int dat[18];
int i;
poke (0x1009,0x3c);
/*request*/
poke (0x1008,8+16);
sleep(.1);
poke (0x1008,4+8+16);
sleep(.1);
poke (0x1008,4+8);
for (i=0; i<16 ;i++)
{
sleep(.0001);
poke (0x1008,4);
poke (0x1008,4+8);
dat[i]=1-digital(7);
}
poke (0x1008,4+8+16);
head=-1+dat[15]+dat[14]*2+dat[13]*4+dat[12]*8+dat[11]*16+dat[10]*32+dat[9]*64+dat[8]*128+dat[7]*256;
printf("Heading: %d\n",head);
return head;
}
Hopefully someone has solved the problem so we can use Tom's routines
soon!
CU
Alf
Ameen Suleman wrote:
>
> Hello:
> I have a V2x compass and I was trying to hook it into my handyboard
> using Tom Brusehaver's .icb, .c and instructions as described in the
> contributed section.
>
> I have also grounded the M/S pin on the compass. The EOC
> pin is sent to the HB thru the npn transistor.
>
> All this is discussed in the mail archive and in Tom's
> description. I still can't get the compass to work.
> With V2x(), I get a constant heading of 0.
> I changed the value of the global head_word to 10 and then
> 10 appears constantly on the LCD. Does this mean, I am
> not getting any SPI interrupts? I don't have a logic probe,
> but I did reset the Compass by grounding the reset pin for
> a moment after running comp_disable(1). There are no
> improvements.
> I checked the eoc line - it always reads .76 V, the SS line
> (through the transistor, at its collector) reads .1 - .2 V.
> I don't know if the compass is sending out any clock signals.
> What am I doing wrong? Do I have a bad compass?
> Thanks for your help.
> Regards,
> ...Ameen Suleman
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Message is in Reply To:
 | | Vector V2x Compass
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| Hello: I have a V2x compass and I was trying to hook it into my handyboard using Tom Brusehaver's .icb, .c and instructions as described in the contributed section. I have also grounded the M/S pin on the compass. The EOC pin is sent to the HB thru (...) (26 years ago, 13-Apr-98, to lugnet.robotics.handyboard)
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