stm32 - smartcard does not get ATR -


i using stm32l053r8 , tda8034. can not atr, using prepared code given st firm , sodexo card smart card. when debug code , stucks here.

/* read atr - loop until it's read */         {       atr_size = sizeof(atr_buff);     }     while (hal_ok != atr_read(&scinterface, atr_buff, &atr_size));

and when entered atr_read funtion, noticed can't exit here return value hal_ok

     /* read atr buffer (atr must sent 40000 clocks after reset) */   retval = hal_smartcard_receive(hsc, buffer, *buffersize, sc_cwt_timeout); #ifdef usart_v0   *buffersize = *buffersize - hsc->rxxfercount - 1; #else   *buffersize = *buffersize - hsc->rxxfercount; #    endif   if ((*buffersize >= 2) && (retval == hal_timeout))   {     retval = hal_ok;   }   return(retval); }

is there can ?


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