Message boxes in eCos

Hi,

Thanks Sepp for your suggestion.

The program is giving correct results now, using cyg_mbox_tryget () instead of cyg_mbox_get (). But still I have one doubt. The reason that you had specified for cyg_mbox_get () is okay, but then using that concept cyg_mbox_peek () would always had returned the count as 0?

With regards,

Sanjay

Sanjay,

I am not using the function cyg_mbox_peek () so I have no idea.

What I am doing is something like this and it works fine:

sending thread:

while(1)

{

...

// when a message should be sent:

if(!cyg_mbox_timed_put(mbox_hdl,(void *)psMsg1,1000))

{

psMsg1 = NULL;

// Do something to resend the message

}

else

{

// wait for acknowledge

ret = cyg_flag_wait(&FlgAckMsg,FLG_MBOX_ACK,CYG_FLAG_WAITMODE_AND | CYG_FLAG_WAITMODE_CLR);

}

...

}

receiving thread:

while(1)

{

...

// allways have a look if there is a new message

pMsg= cyg_mbox_tryget(mbox_hdl);

if(pMsg2 != NULL)

{

save message:

// Saving the message data into a local struct

acknowledge:

cyg_flag_setbits(&FlgAckMsg,FLG_MBOX_ACK);

work with received data:

// Decoding the received message and do some action with it

}

...

}

Regards,

Sepp