RE: [ECOS] Bug for Cirrus Logic EDB7XXX??

RE: [ECOS] Bug for Cirrus Logic EDB7XXX??

[Dan Conti]

That is correct. I think they might have had some differences on the DAI
circuitry too, but i can't remember at the moment.

-Dan

> I don't see any mention of a DRAM controller on that page.  It does
> mention that it has a memory controller for up to six memory segments
> which support ROM, FLash and SRAM, but no DRAM.
> 
> AFAIK, the 7209 is a DRAM-less version of the 7212.
 

Re: [ECOS] Bug for Cirrus Logic EDB7XXX??

[Lewin A.R.W. Edwards]

>But we may have a terminology problem here. We previously somehow
>understood that the EP7209 had no DRAM controller. But according to
> http://www.cirrus.com/design/products/overview/index.cfm?DivisionID=6&SubdivisionID=28&ProductID=109
>it clearly does. Gary, comments?

Query: What is it on that page that makes you believe the 7209 has a DRAM 
controller? The document you reference above doesn't actually mention the 
acronym "DRAM" anywhere. The only memory types it specifically talks about 
are ROM, FLASH and SRAM.

The functional diagram on p.1 of the EP7209's data sheet (Dec 99, DS453PP2) 
does show A0..A27 also serving as DRA0..12 a la the 7212, implying the 
existence of a DRAM controller. However I think this is a "templating 
error". The EP7209 lacks a DRFPR register, at least documented, so the DRAM 
controller can't be supported, if it does exist on chip.

The truly interesting thing is that the EDB7209 development kit brief 
states that the board has an EP7209 and 16Mb of EDO DRAM. In which case, I 
don't see any difference between the EP7209 and the EP7212.

=== Lewin A.R.W. Edwards (Embedded Engineer)
Work: http://www.digi-frame.com/
Personal: http://www.zws.com/ and http://www.larwe.com/

"... a man who is endowed with real qualities of leadership will be tempted 
to refrain from taking part in political life; because [...] the situation 
does not call for a man who has a capacity for constructive statesmanship 
but rather for a man who is capable of bargaining for the favour of the 
majority. Thus the situation will appeal to small minds and will attract 
them accordingly."

Re: [ECOS] Bug for Cirrus Logic EDB7XXX??

[Jonathan Larmour]

Gary Thomas wrote:
> 
> On 29-May-2001 Jonathan Larmour wrote:
> >
> > Indeed this symbol isn't defined by the configuration tool. It should be
> >#ifdef CYGHWR_HAL_ARM_EDB7XXX_VARIANT_EP7209

I'll change this BTW.
 
> I don't see any mention of a DRAM controller on that page.  It does
> mention that it has a memory controller for up to six memory segments
> which support ROM, FLash and SRAM, but no DRAM.
> 
> AFAIK, the 7209 is a DRAM-less version of the 7212.

Oops. Sorry, you're right. I forgot that the board had SRAM.

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine

Re: [ECOS] Bug for Cirrus Logic EDB7XXX??

[Gary Thomas]

On 29-May-2001 Jonathan Larmour wrote:
> honda@itri.org.tw wrote:
>> 
>> So, suppose I choose the EP7209 as the processor, the symbol should be
>> declared, am I right?
>> I've done the following test,
>> 
>>      1. choose EP7209 as the processor for EDB7xxxx,
>>      2. add "#error EP7209" under "#ifdef CYGPKG_HAL_ARM_EDB7209"
>>      3. compile the project.
>> But it never produce the error.
>> Also, I check the system.h that generated by the ConfigTool, only
>> CYGPKG_HAL_ARM_EDB7xxx is defined.
> 
> Indeed this symbol isn't defined by the configuration tool. It should be
>#ifdef CYGHWR_HAL_ARM_EDB7XXX_VARIANT_EP7209
> 
> But we may have a terminology problem here. We previously somehow
> understood that the EP7209 had no DRAM controller. But according to
> http://www.cirrus.com/design/products/overview/index.cfm?DivisionID=6&SubdivisionID=28&ProductID=1
> 09
> it clearly does. Gary, comments?

I don't see any mention of a DRAM controller on that page.  It does
mention that it has a memory controller for up to six memory segments
which support ROM, FLash and SRAM, but no DRAM.

AFAIK, the 7209 is a DRAM-less version of the 7212.

Re: [ECOS] Bug for Cirrus Logic EDB7XXX??

[Jonathan Larmour]

honda@itri.org.tw wrote:
> 
> So, suppose I choose the EP7209 as the processor, the symbol should be
> declared, am I right?
> I've done the following test,
> 
>      1. choose EP7209 as the processor for EDB7xxxx,
>      2. add "#error EP7209" under "#ifdef CYGPKG_HAL_ARM_EDB7209"
>      3. compile the project.
> But it never produce the error.
> Also, I check the system.h that generated by the ConfigTool, only
> CYGPKG_HAL_ARM_EDB7xxx is defined.

Indeed this symbol isn't defined by the configuration tool. It should be
#ifdef CYGHWR_HAL_ARM_EDB7XXX_VARIANT_EP7209

But we may have a terminology problem here. We previously somehow
understood that the EP7209 had no DRAM controller. But according to
http://www.cirrus.com/design/products/overview/index.cfm?DivisionID=6&SubdivisionID=28&ProductID=109
it clearly does. Gary, comments?

Jifl
-- 
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine

RE: [ECOS] Bug for Cirrus Logic EDB7XXX??

[honda]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 2336 bytes --]


So, suppose I choose the EP7209 as the processor, the symbol should be
declared, am I right?
I've done the following test,

     1. choose EP7209 as the processor for EDB7xxxx,
     2. add "#error EP7209" under "#ifdef CYGPKG_HAL_ARM_EDB7209"
     3. compile the project.
But it never produce the error.
Also, I check the system.h that generated by the ConfigTool, only
CYGPKG_HAL_ARM_EDB7xxx is defined.

Kuang-Yang Chuang

OES / ITRI
J220, Bldg. 78, 195-8, Sec. 4, Chung-Hsing Rd.
Chutung, Hsinchu 310, Taiwan, ROC

TEL: 886-3-5917546
FAX: 886-3-5917531



                                                                                                                          
                    Gary Thomas                                                                                           
                    <gthomas@cambridge.r        ¦¬¥ó¤H¡G     honda@itri.org.tw                                            
                    edhat.com>                  °Æ¥»§Û°e¡G   eCos discussion <ecos-discuss@sources.redhat.com>            
                    ±H¥ó¤H¡G                    ¥D¦®¡G  RE: [ECOS] Bug for Cirrus Logic EDB7XXX??                         
                    gary@chez-thomas.org                                                                                  
                                                                                                                          
                                                                                                                          
                    2001/05/25 07:59 PM                                                                                   
                                                                                                                          
                                                                                                                          



On 25-May-2001 honda@itri.org.tw wrote:
> Hi,
>
>      In the file
> packages\hal\arm\edb7xxx\current\include\hal_platform_setup.h, a
statement
> '#ifdef CYGPKG_HAL_ARM_EDB7209' is find, but it never be defined. Is it a
> bug?

No.  This is one of the symbols which would be defined by the ConfigTool.

RE: [ECOS] Bug for Cirrus Logic EDB7XXX??

[Gary Thomas]

On 25-May-2001 honda@itri.org.tw wrote:
> Hi,
> 
>      In the file
> packages\hal\arm\edb7xxx\current\include\hal_platform_setup.h, a statement
> '#ifdef CYGPKG_HAL_ARM_EDB7209' is find, but it never be defined. Is it a
> bug?

No.  This is one of the symbols which would be defined by the ConfigTool.

[ECOS] Bug for Cirrus Logic EDB7XXX??

[honda]

Hi,

     In the file
packages\hal\arm\edb7xxx\current\include\hal_platform_setup.h, a statement
'#ifdef CYGPKG_HAL_ARM_EDB7209' is find, but it never be defined. Is it a
bug?

Kuang-Yang Chuang

OES / ITRI
J220, Bldg. 78, 195-8, Sec. 4, Chung-Hsing Rd.
Chutung, Hsinchu 310, Taiwan, ROC

TEL: 886-3-5917546
FAX: 886-3-5917531