* [ECOS] I2C Driver not initializing
@ 2007-09-11 14:06 Alexandre
2007-09-11 14:15 ` Andrew Lunn
0 siblings, 1 reply; 5+ messages in thread
From: Alexandre @ 2007-09-11 14:06 UTC (permalink / raw)
To: ecos-discuss
Hello all,
Would anyone happend to know what i'd have to do for a driver to init ?
I've linked my i2c init function to the generic i2c interface but my
specific function is never called. I don't think the I2C interface
init function is called anyway, i supposed it would happen
automatically after configuring I2C in the ecos config tool but this
isn't the case.
Do I have to call the init function myself in cyg_user_start() ?
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [ECOS] I2C Driver not initializing
2007-09-11 14:06 [ECOS] I2C Driver not initializing Alexandre
@ 2007-09-11 14:15 ` Andrew Lunn
2007-09-11 14:26 ` Alexandre
0 siblings, 1 reply; 5+ messages in thread
From: Andrew Lunn @ 2007-09-11 14:15 UTC (permalink / raw)
To: Alexandre; +Cc: ecos-discuss
On Tue, Sep 11, 2007 at 04:06:30PM +0200, Alexandre wrote:
> Hello all,
>
> Would anyone happend to know what i'd have to do for a driver to init ?
> I've linked my i2c init function to the generic i2c interface but my
> specific function is never called. I don't think the I2C interface
> init function is called anyway, i supposed it would happen
> automatically after configuring I2C in the ecos config tool but this
> isn't the case.
Is this a I2C device driver you have written yourself? Or is it one of
the existing device drivers?
What do you have in the cdl file for the driver?
compile -library=libextras.a my_i2c.c
Im wondering if the linker has throw the driver out because it is not
being used. By adding the -library=libextras.a the linker cannot throw
it away.
Andrew
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* Re: [ECOS] I2C Driver not initializing
2007-09-11 14:15 ` Andrew Lunn
@ 2007-09-11 14:26 ` Alexandre
2007-09-11 15:25 ` Andrew Lunn
0 siblings, 1 reply; 5+ messages in thread
From: Alexandre @ 2007-09-11 14:26 UTC (permalink / raw)
To: Alexandre, ecos-discuss
> Is this a I2C device driver you have written yourself? Or is it one of
> the existing device drivers?
Well it's one I've written myself as i didn't found any driver for the
LPC2XXX port.
> What do you have in the cdl file for the driver?
Actually, nothing, the driver part is style in my user code as I
wanted to test it before even trying to include it in eCos.
I added the package "I2C Support" to my package build and tried to
link my functions to it. Everything compiles just fine and i can
access the generic I2C functions as the headers are added to my
source.
> compile -library=libextras.a my_i2c.c
libextras.a already exists in my config and contains my serial devices
configuration. It does not contain anything about i2c however, should
it ?
> Im wondering if the linker has throw the driver out because it is not
> being used. By adding the -library=libextras.a the linker cannot throw
> it away.
Well even the generic I2C driver code is not initialized so I think I
made a mistake by forgetting something or misunderstanding the whole
concept ^^
Alex
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* Re: [ECOS] I2C Driver not initializing
2007-09-11 14:26 ` Alexandre
@ 2007-09-11 15:25 ` Andrew Lunn
2007-09-11 16:04 ` Alexandre
0 siblings, 1 reply; 5+ messages in thread
From: Andrew Lunn @ 2007-09-11 15:25 UTC (permalink / raw)
To: Alexandre; +Cc: ecos-discuss
> Well even the generic I2C driver code is not initialized so I think I
> made a mistake by forgetting something or misunderstanding the whole
> concept ^^
Do you call any I2C function? If nothing is using I2C it will all get
throw out by the linker.
Take a look at the functions which are actually in your
image.
arm-elf-objdump --syms myprog
Is the i2c code there?
Andrew
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* Re: [ECOS] I2C Driver not initializing
2007-09-11 15:25 ` Andrew Lunn
@ 2007-09-11 16:04 ` Alexandre
0 siblings, 0 replies; 5+ messages in thread
From: Alexandre @ 2007-09-11 16:04 UTC (permalink / raw)
To: Alexandre, ecos-discuss
Ok that was the problem, the i2c file was rejected by the linker and
not included in the code since considered unused, it works now ...
I feel shame ^^
Thanks a lot Andrew, as usual :)
On 9/11/07, Andrew Lunn <andrew@lunn.ch> wrote:
> > Well even the generic I2C driver code is not initialized so I think I
> > made a mistake by forgetting something or misunderstanding the whole
> > concept ^^
>
> Do you call any I2C function? If nothing is using I2C it will all get
> throw out by the linker.
>
> Take a look at the functions which are actually in your
> image.
>
> arm-elf-objdump --syms myprog
>
> Is the i2c code there?
>
> Andrew
>
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2007-09-11 14:06 [ECOS] I2C Driver not initializing Alexandre
2007-09-11 14:15 ` Andrew Lunn
2007-09-11 14:26 ` Alexandre
2007-09-11 15:25 ` Andrew Lunn
2007-09-11 16:04 ` Alexandre
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