* <!--
* Copyright 2000 Bernardo Innocenti <bernie@codewiz.org>
* Copyright 2003,2004 Develer S.r.l. (http://www.develer.com/)
- * All Rights Reserved.
+ * This file is part of DevLib - See devlib/README for information.
* -->
*
* \version $Id$
/*
* $Log$
+ * Revision 1.4 2004/06/03 11:27:09 bernie
+ * Add dual-license information.
+ *
+ * Revision 1.3 2004/06/02 21:35:24 aleph
+ * Serial enhancements: interruptible receive handler and 8 bit serial status for AVR; remove volatile attribute to FIFOBuffer, useless for new fifobuf routens
+ *
* Revision 1.2 2004/05/23 18:21:53 bernie
* Trim CVS logs and cleanup header info.
*
/*!
- * Serial 0 RX complete interrupt handler
+ * Serial 0 RX complete interrupt handler.
+ *
+ * This handler is interruptible.
+ * Interrupt are reenabled as soon as recv complete interrupt is
+ * disabled. Using INTERRUPT() is troublesome when the serial
+ * is heavily loaded, because and interrupt could be retriggered
+ * when executing the handler prologue before RXCIE is disabled.
*/
#ifdef __AVR_ATmega103__
SIGNAL(SIG_UART_RECV)
SIGNAL(SIG_UART0_RECV)
#endif
{
+ /* Disable Recv complete IRQ */
+ UCR &= ~BV(RXCIE);
+ ENABLE_INTS;
+
/* Should be read before UDR */
ser_handles[SER_UART0].status |= USR & (SERRF_RXSROVERRUN | SERRF_FRAMEERROR);
RTS_OFF;
#endif
}
+ /* Reenable receive complete int */
+ UCR |= BV(RXCIE);
}
/*!
- * Serial 1 RX complete interrupt handler
+ * Serial 1 RX complete interrupt handler.
+ *
+ * This handler is interruptible.
+ * Interrupt are reenabled as soon as recv complete interrupt is
+ * disabled. Using INTERRUPT() is troublesome when the serial
+ * is heavily loaded, because and interrupt could be retriggered
+ * when executing the handler prologue before RXCIE is disabled.
*/
#ifndef __AVR_ATmega103__
SIGNAL(SIG_UART1_RECV)
{
+ /* Disable Recv complete IRQ */
+ UCSR0B &= ~BV(RXCIE);
+ ENABLE_INTS;
+
/* Should be read before UDR */
ser_handles[SER_UART1].status |= UCSR1A & (SERRF_RXSROVERRUN | SERRF_FRAMEERROR);
RTS_OFF;
#endif
}
+ /* Reenable receive complete int */
+ UCSR0B |= BV(RXCIE);
}
#endif /* !__AVR_ATmega103__ */