[ECOS] Reading flash config value from application

[ECOS] Reading flash config value from application

[André-John Mas]

Hi,

I use fconfig in my redboot to set an IP address for my card. What is  
the
best way to read this IP address from my application, since  
flash_config.h
seems to be part of the Redboot package.

Andre

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Re: [ECOS] Reading flash config value from application

[Gary Thomas]

On Fri, 2006-06-16 at 19:22 -0400, André-John Mas wrote:
> Hi,
> 
> I use fconfig in my redboot to set an IP address for my card. What is  
> the
> best way to read this IP address from my application, since  
> flash_config.h
> seems to be part of the Redboot package.

You can do this using the Virtual Vectors interface into RedBoot.
The call:
  CYGACC_CALL_IF_FLASH_CFG_OP(CYGNUM_CALL_IF_FLASH_CFG_GET,
                              <fconfig_name>, 
                              &result, 
                              <type>)

Where <fconfig_name> is a string containing the 'fconfig' short name for
the data item (use 'fc -l -n' to see what the names are).  The variable 
<type> defines the type of data.  You can find the #define's for these 
in the include file "flash_config.h".

Note: the result of this call is a boolean - true if the data was
found, false if not.

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------


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Re: [ECOS] Reading flash config value from application

[Gary Thomas]

On Fri, 2006-06-16 at 22:43 -0400, André-John Mas wrote:
> Which package do I need to include in my ECC for this?

Please keep your replies on the list so that all may benefit.

No special packages are required;  just include <cyg/hal/hal_if.h>

> Andre
> 
> On 16-Jun-06, at 21:41 , Gary Thomas wrote:
> 
> > On Fri, 2006-06-16 at 19:22 -0400, André-John Mas wrote:
> >> Hi,
> >>
> >> I use fconfig in my redboot to set an IP address for my card. What is
> >> the
> >> best way to read this IP address from my application, since
> >> flash_config.h
> >> seems to be part of the Redboot package.
> >
> > You can do this using the Virtual Vectors interface into RedBoot.
> > The call:
> >   CYGACC_CALL_IF_FLASH_CFG_OP(CYGNUM_CALL_IF_FLASH_CFG_GET,
> >                               <fconfig_name>,
> >                               &result,
> >                               <type>)
> >
> > Where <fconfig_name> is a string containing the 'fconfig' short  
> > name for
> > the data item (use 'fc -l -n' to see what the names are).  The  
> > variable
> > <type> defines the type of data.  You can find the #define's for these
> > in the include file "flash_config.h".
> >
> > Note: the result of this call is a boolean - true if the data was
> > found, false if not.
> >
> > -- 
> > ------------------------------------------------------------
> > Gary Thomas                 |  Consulting for the
> > MLB Associates              |    Embedded world
> > ------------------------------------------------------------
> >
> >
> > -- 
> > Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ 
> > ecos
> > and search the list archive: http://ecos.sourceware.org/ml/ecos- 
> > discuss
-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------


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Re: [ECOS] Reading flash config value from application

[André-John Mas]

Oops, sorry for that. Thanks for the help.

Andre

On 17-Jun-06, at 17:25 , Gary Thomas wrote:

> On Fri, 2006-06-16 at 22:43 -0400, André-John Mas wrote:
>> Which package do I need to include in my ECC for this?
>
> Please keep your replies on the list so that all may benefit.
>
> No special packages are required;  just include <cyg/hal/hal_if.h>
>
>> Andre
>>
>> On 16-Jun-06, at 21:41 , Gary Thomas wrote:
>>
>>> On Fri, 2006-06-16 at 19:22 -0400, André-John Mas wrote:
>>>> Hi,
>>>>
>>>> I use fconfig in my redboot to set an IP address for my card.  
>>>> What is
>>>> the
>>>> best way to read this IP address from my application, since
>>>> flash_config.h
>>>> seems to be part of the Redboot package.
>>>
>>> You can do this using the Virtual Vectors interface into RedBoot.
>>> The call:
>>>   CYGACC_CALL_IF_FLASH_CFG_OP(CYGNUM_CALL_IF_FLASH_CFG_GET,
>>>                               <fconfig_name>,
>>>                               &result,
>>>                               <type>)
>>>
>>> Where <fconfig_name> is a string containing the 'fconfig' short
>>> name for
>>> the data item (use 'fc -l -n' to see what the names are).  The
>>> variable
>>> <type> defines the type of data.  You can find the #define's for  
>>> these
>>> in the include file "flash_config.h".
>>>
>>> Note: the result of this call is a boolean - true if the data was
>>> found, false if not.
>>>
>>> -- 
>>> ------------------------------------------------------------
>>> Gary Thomas                 |  Consulting for the
>>> MLB Associates              |    Embedded world
>>> ------------------------------------------------------------
>>>
>>>
>>> -- 
>>> Before posting, please read the FAQ: http://ecos.sourceware.org/fom/
>>> ecos
>>> and search the list archive: http://ecos.sourceware.org/ml/ecos-
>>> discuss
> -- 
> ------------------------------------------------------------
> Gary Thomas                 |  Consulting for the
> MLB Associates              |    Embedded world
> ------------------------------------------------------------


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Re: [ECOS] Reading flash config value from application

[Gary Thomas]

[-- Attachment #1: Type: text/plain, Size: 1827 bytes --]

On Tue, 2006-06-20 at 18:26 -0400, Andre-John Mas wrote:
> Hi,
> 
> I am not sure what I am doing wrong, but CYGACC_CALL_IF_FLASH_CFG_OP is not finding the value (returning false). I am trying to read the "bootp_my_ip" value. Every time the card restarts the redboot sees the right values, so it doesn't seem to be an issue of data getting over-written.
> 
> Below are the modifications I made to network_support.c in the net/common package:
> 
> #include <cyg/hal/hal_if.h>
> 
> // For fetching the IP info from RedBoot
> #include <cyg/hal/hal_if.h>
> #ifndef CONFIG_IP
> #define CONFIG_IP 5
> #endif
> 
> typedef unsigned char ip_addr_t[4];
> 
> //
> // taken from redboot ... net/net_io.c
> //
> static bool
> flash_get_IP(char *id, ip_addr_t *val)
> {
>   ip_addr_t my_ip[4];

Do you really want an array of 4 ip_address_t objects?

>   int i;
> 
>   if (CYGACC_CALL_IF_FLASH_CFG_OP(CYGNUM_CALL_IF_FLASH_CFG_GET, id, &my_ip, CONFIG_IP))
>   {
>     diag_printf("flash_get_IP %s\n", my_ip);
>     if (my_ip[0] != 0 || my_ip[1] != 0 ||
>         my_ip[2] != 0 || my_ip[3] != 0) {
>         // 'id' is set to something so let it override any static IP
>         for (i=0; i<4; i++)
>           (*val)[i] = my_ip[i];
>         }
>     }
>     else
>     {
>       return false;
>     }
> }
> 
> and then in the init_all_networks_interfaces() function I have:
> 
> struct in_addr card_ip;
> 
> flash_get_IP("bootp_my_ip", card_ip.s_addr);
> 
> Any ideas what I might be doing wrong?

I don't see anything in particular wrong with this code.  I tried
the attached program and it worked just fine for me.

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------

[-- Attachment #2: fconfig_test.c --]
[-- Type: text/x-csrc, Size: 552 bytes --]

#include <stdio.h>
#include <cyg/kernel/kapi.h>
#include <cyg/hal/hal_if.h>
#include <network.h>

#define CONFIG_IP 5

int
main(int argc, char *argv[])
{
    unsigned long addr;

    if (CYGACC_CALL_IF_FLASH_CFG_OP(CYGNUM_CALL_IF_FLASH_CFG_GET, 
                                    "bootp_my_ip", 
                                    &addr, 
                                    CONFIG_IP)) {
        diag_dump_buf(&addr, sizeof(addr));
    } else {
        printf("Can't get 'bootp_my_ip'\n");
    }
    printf("fconfig_test done\n");
    return 0;
}


[-- Attachment #3: Type: text/plain, Size: 148 bytes --]

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Re: [ECOS] Reading flash config value from application

[Andre-John Mas]

Hi,

I am not sure what I am doing wrong, but CYGACC_CALL_IF_FLASH_CFG_OP is not finding the value (returning false). I am trying to read the "bootp_my_ip" value. Every time the card restarts the redboot sees the right values, so it doesn't seem to be an issue of data getting over-written.

Below are the modifications I made to network_support.c in the net/common package:

#include <cyg/hal/hal_if.h>

// For fetching the IP info from RedBoot
#include <cyg/hal/hal_if.h>
#ifndef CONFIG_IP
#define CONFIG_IP 5
#endif

typedef unsigned char ip_addr_t[4];

//
// taken from redboot ... net/net_io.c
//
static bool
flash_get_IP(char *id, ip_addr_t *val)
{
  ip_addr_t my_ip[4];
  int i;

  if (CYGACC_CALL_IF_FLASH_CFG_OP(CYGNUM_CALL_IF_FLASH_CFG_GET, id, &my_ip, CONFIG_IP))
  {
    diag_printf("flash_get_IP %s\n", my_ip);
    if (my_ip[0] != 0 || my_ip[1] != 0 ||
        my_ip[2] != 0 || my_ip[3] != 0) {
        // 'id' is set to something so let it override any static IP
        for (i=0; i<4; i++)
          (*val)[i] = my_ip[i];
        }
    }
    else
    {
      return false;
    }
}

and then in the init_all_networks_interfaces() function I have:

struct in_addr card_ip;

flash_get_IP("bootp_my_ip", card_ip.s_addr);

Any ideas what I might be doing wrong?

Andre



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