Re: [ECOS] Reading flash config value from application

[Gary Thomas <gary@mlbassoc.com>]

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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 --]
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#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;
}


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