Re: [lwip-users] How do I define the LWIP_PLATFORM_DIAG

[Andrew Foster]

What you are really after are the type formats used by your printf 
implementation. If you aren't trying to type check values passed as 
parameters, you can get away with the following defines:

   #define U8_F "c"
   #define S8_F "c"
   #define X8_F "x"
   #define U16_F "u"
   #define S16_F "d"
   #define X16_F "x"
   #define U32_F "u"
   #define S32_F "d"
   #define X32_F "x"

Alternatively, get rid of your "ud" and "ul" definitions and your 
problem should go away. "ud" and "ul" are not valid types for the printf 
function.

On 08/24/2011 12:58 PM, narke wrote:
> Hi,
>
> I tried to define as
>
> #define S16_F "d"
> #define U16_F "ud"
> #define U32_F "ul"
> #define S32_F "l"
> #define X16_F "04x"
> #define X32_F "08x"
>
> #define LWIP_PLATFORM_DIAG(message) do { printf(message); } while(0)
>
> but the compile results in strange warnings and errors. For example:
>
>      LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE,
> ("dhcp_handle_nak(netif=%p) %c%c%"U16_F"\n",
> "d:\woody\svn\CommUnit\port-lwip-1.4.0\lwip-1.4.0\src\core\dhcp.c",186
>   Warning[Pe174]: expression has no effect
>      LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE,
> ("dhcp_handle_nak(netif=%p) %c%c%"U16_F"\n",
> "d:\woody\svn\CommUnit\port-lwip-1.4.0\lwip-1.4.0\src\core\dhcp.c",186
>   Warning[Pe174]: expression has no effect
>      LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE,
> ("dhcp_handle_nak(netif=%p) %c%c%"U16_F"\n",
> "d:\woody\svn\CommUnit\port-lwip-1.4.0\lwip-1.4.0\src\core\dhcp.c",186
>   Warning[Pe174]: expression has no effect
>      LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE,
> ("dhcp_handle_nak(netif=%p) %c%c%"U16_F"\n",
> "d:\woody\svn\CommUnit\port-lwip-1.4.0\lwip-1.4.0\src\core\dhcp.c",186
>   Warning[Pe174]: expression has no effect
>      LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE,
> ("dhcp_handle_nak(netif=%p) %c%c%"U16_F"\n",
> "d:\woody\svn\CommUnit\port-lwip-1.4.0\lwip-1.4.0\src\core\dhcp.c",186
>   Error[Pe167]: argument of type "u16_t" is incompatible with parameter
> of type "char const *"
>
>
> I have no idea about what's wrong with my definition.  Can anyone give
> me an successful example?
>
> Thanks in advance.