ADIS16250: Help with setting up SPI

[Raflex]

Good job!!

[InitialDriveGTR]

I wrote up some new code that is meant to use two ADIS16250 Gyros. Once I figure out what LSB (Not Least signifigant bit)(I think), I will use them in a RC Helicopter Navigation system.
<a href="http://initialdrivegtr.po.gs/SourceCode-2.htm">http://initialdrivegtr.po.gs/SourceCode-2.htm</a>

I hope this helps anyone that has had any trouble with these gyros too. Thanks for all your help!

InitialDriveGTR

[mister_e]

Look fine but there's 2 mistake in this

     DEFINE HSER_CLOERR 1

should be

     DEFINE HSER_CLROERR 1

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   INCLUDE "modedefs.bas"

Nowhere in your code you're using MSBPRE, LSBPRE or else, you're using the SHIFTIN/SHIFTOUT mode # instead. You can remove this INCLUDE line.
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Just for safety sake, you should set CS0, CS1 to high before the main loop. Just before the PAUSE 1000

[InitialDriveGTR]

The Defines for the Hardware serial were generated using a program I found here. So, I honestly didn't even know what it was(or at least I didn't put much thought into them). As for the MSBPRE, etc. I found I fould change between using the numeric values and the text versions, so I just left it there.

[mister_e]

DOH! so it was partially my fault. You used the old version of the SPBRG calc... wich is mine... i thought i sent the updated one seems not. BTW.. you're not using HSERIN so it doesn't cause any problem

Anyways here's the corrected version

EDIT: i remind to have posted an update... but on a USB thread. DOH!

Anyways, there's another applet comming soons including Timer calc, Reverse timer calc, SPBRG and HPWM. Still on test as now.

I don't want to do the same mistake twice

[InitialDriveGTR]

Do you know what the "LSB" is on the ADIS16250 datasheet? I think it is being used as a unit. Thanks

PS mister_e, I could host your calculator software on my website if you would like

[SteveB]

Do you know what the "LSB" is on the ADIS16250 datasheet? I think it is being used as a unit. Thanks

Yes, it is. See Table 6. On the far right, it shows that each bit, for the different outputs, represents a particular values. For instance, each bit of the GYRO_OUT register is equal to 0.07326°/sec (when scaling is set to 320°/sec). So, if this register was %0000 0111 1101 0000 (2000), it would mean a value of 2000 * 0.07326 = 146.52°/sec.

If you look at table 1, you see the SENSITIVITY parameters (Compare this to table 7):
Range = 320°/sec, LSB is 1/13.65 = 0.07326 °/sec
Range = 160°/sec, LSB is 1/27.30 = 0.03663 °/sec
Range = 080°/sec, LSB is 1/54.60 = 0.018315 °/sec
EDIT: These numbers are also presented in the text below table 12


HTH,
Steve

EDIT: Here is a link to the datasheet to keep others from having to search for it.

[mister_e]

PS mister_e, I could host your calculator software on my website if you would like

I have no problem with that. Another site already did it without my permission anyway

If you get cash from it, i'm also wide open