Move dsp56k and i196 drivers to their drv/ dirs.

[bertos.git] / cpu / i196 / drv / ser_i196.c

diff --git a/cpu/i196/drv/ser_i196.c b/cpu/i196/drv/ser_i196.c
new file mode 100644 (file)
index 0000000..a87de6f
--- /dev/null
+++ b/cpu/i196/drv/ser_i196.c
@@ -0,0 +1,134 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright (C) 2003,2004 Develer S.r.l. (http://www.develer.com/)
+ * Copyright (C) 2000 Bernardo Innocenti <bernie@codewiz.org>
+ *
+ * -->
+ *
+ * \version $Id$
+ *
+ * \author Bernardo Innocenti <bernie@develer.com>
+ *
+ * \brief CPU specific serial I/O driver
+ */
+
+/*#*
+ *#* $Log$
+ *#* Revision 1.7  2006/07/19 12:56:26  bernie
+ *#* Convert to new Doxygen style.
+ *#*
+ *#* Revision 1.6  2005/11/04 16:20:02  bernie
+ *#* Fix reference to README.devlib in header.
+ *#*
+ *#* Revision 1.5  2004/12/13 11:51:08  bernie
+ *#* DISABLE_INTS/ENABLE_INTS: Convert to IRQ_DISABLE/IRQ_ENABLE.
+ *#*
+ *#* Revision 1.4  2004/08/25 14:12:08  rasky
+ *#* Aggiornato il comment block dei log RCS
+ *#*
+ *#* Revision 1.3  2004/06/03 11:27:09  bernie
+ *#* Add dual-license information.
+ *#*
+ *#* Revision 1.2  2004/05/23 18:21:53  bernie
+ *#* Trim CVS logs and cleanup header info.
+ *#*
+ *#*/
+
+#include "hw.h"
+#include "serhw.h"
+
+#define SER_HW_ENABLE_TX \
+       ATOMIC( \
+               if (!ser_sending) \
+               { \
+                       ser_sending = true; \
+                       (INT_PEND1 |= INT1F_TI) \
+               } \
+       );
+
+static volatile bool ser_sending;
+
+// Serial TX intr
+INTERRUPT(0x30) void TI_interrupt(void)
+{
+       if (CANT_SEND)
+       {
+               ser_sending = false;
+               return;
+       }
+
+       /* Can we send two bytes at the same time? */
+       if (SP_STAT & SPSF_TX_EMPTY)
+       {
+               SBUF = fifo_pop(&ser_txfifo);
+
+               if (CANT_SEND)
+               {
+                       ser_sending = false;
+                       return;
+               }
+       }
+
+       SBUF = fifo_pop(&ser_txfifo);
+}
+
+INTERRUPT(0x32) void RI_interrupt(void)
+{
+       ser_status |= SP_STAT &
+               (SPSF_OVERRUN_ERROR | SPSF_PARITY_ERROR | SPSF_FRAMING_ERROR);
+       if (fifo_isfull(&ser_rxfifo))
+               ser_status |= SERRF_RXFIFOOVERRUN;
+       else
+               fifo_push(&ser_rxfifo, SBUF);
+}
+
+static void ser_setbaudrate(unsigned long rate)
+{
+       // Calcola il periodo per la generazione del baud rate richiesto
+       uint16_t baud = (uint16_t)(((CLOCK_FREQ / 16) / rate) - 1) | 0x8000;
+       BAUD_RATE = (uint8_t)baud;
+       BAUD_RATE = (uint8_t)(baud >> 8);
+}
+
+static void ser_hw_init(void)
+{
+       // Inizializza la porta seriale
+       SP_CON = SPCF_RECEIVE_ENABLE | SPCF_MODE1;
+       ioc1_img |= IOC1F_TXD_SEL | IOC1F_EXTINT_SRC;
+       IOC1 = ioc1_img;
+
+       // Svuota il buffer di ricezione
+       {
+               uint8_t dummy = SBUF;
+       }
+
+       // Abilita gli interrupt
+       INT_MASK1 |= INT1F_TI | INT1F_RI;
+}
+