Re: [Gumstix-users] I2C Address out of range

[Alex G. <ad...@so...>]

I got the sonar working, thank you. Am I right in now thinking that spi-io 
is the same as i2c-io, in being that I will not be able to access my SPI 
sensors connected to roboaudiostix with this command? I have a 3 (single 
axis) gyro and 3 (single axis) accelerometers connected via this link. Do I 
need to create a program similar to i2c (without the -io) but for spi, to 
access their registers?

Thanks again,

Alex


----- Original Message ----- 
From: "Dave Hylands" <dhy...@gm...>
To: "General mailing list for gumstix users." 
<gum...@li...>
Sent: Monday, April 02, 2007 9:24 PM
Subject: Re: [Gumstix-users] I2C Address out of range


> Hi Alex,
>
> On 4/2/07, Alex Gooding <ad...@so...> wrote:
>> Thanks Dave that fixed the problem of where it was, but am having trouble
>> accessing it. I receive the following error. I think I haven't set up the
>> ports (D.0 for SCL and Port D.1 for SDA) correctly. (I just did i2c-io 
>> 0x0b
>> SetDir D.0 out and i2c-io 0x0b SetDir D.1 in)
>
> Umm. Don't do that.
>
> If you have a robostix (which is the only thing that I'm aware of that
> responds to i2c-io commands) and it has i2c-io.hex installed, then it
> takes care of configuring the SDA and SCL lines correctly.
>
> Try to mess with them can only screw things up.
>
> SDA and SCL are bidirectional, not input and output signals.
>
>> [root@gumstix bin]# i2c-io 0x70 ReadReg 0
>> ERROR: I2cTransfer: CRC failed: Rcvd: 0x00, expecting: 0x6e
>> ERROR: I2cReadBlock failed
>> ERROR: Unable to retrieve BootLoader information from i2c address 0x70
>
> You can't use i2c-io to talk to one of the sonar modules. You can only
> use it to talk to the robostix running the i2c-io.hex file.
>
> You need to use the i2c program (without the -io) to talk to the sonar 
> modules.
>
> -- 
> Dave Hylands
> Vancouver, BC, Canada
> http://www.DaveHylands.com/
>
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