-/*!
+/**
* \file
* <!--
- * Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
+ * 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 2003, 2004, 2006 Develer S.r.l. (http://www.develer.com/)
* Copyright 2000 Bernardo Innocenti <bernie@codewiz.org>
- * This file is part of DevLib - See devlib/README for information.
+ *
* -->
*
* \brief Buffered serial I/O driver
* \author Bernardo Innocenti <bernie@develer.com>
*/
-/*#*
- *#* $Log$
- *#* Revision 1.21 2004/11/16 18:10:13 bernie
- *#* Add sanity checks for missing configuration parameters.
- *#*
- *#* Revision 1.20 2004/10/19 11:48:00 bernie
- *#* Remove unused variable.
- *#*
- *#* Revision 1.19 2004/10/19 08:14:13 bernie
- *#* Fix a few longstanding bugs wrt status handling (made by rasky on scfirm).
- *#*
- *#* Revision 1.18 2004/09/20 03:31:15 bernie
- *#* Sanitize for C++.
- *#*
- *#* Revision 1.17 2004/09/14 21:06:07 bernie
- *#* Use debug.h instead of kdebug.h; Spelling fixes.
- *#*
- *#* Revision 1.16 2004/09/06 21:40:50 bernie
- *#* Move buffer handling in chip-specific driver.
- *#*
- *#* Revision 1.15 2004/08/25 14:12:08 rasky
- *#* Aggiornato il comment block dei log RCS
- *#*
- *#* Revision 1.14 2004/08/24 16:22:57 bernie
- *#* Thinkos; Doxygen fixes
- *#*
- *#* Revision 1.13 2004/08/24 16:20:48 bernie
- *#* ser_read(): Make buffer argument void *#* for consistency with ANSI C and ser_write()
- *#*
- *#* Revision 1.12 2004/08/24 13:49:39 bernie
- *#* Fix thinko.
- *#*
- *#* Revision 1.11 2004/08/15 05:32:22 bernie
- *#* ser_resync(): New function.
- *#*
- *#* Revision 1.10 2004/08/10 06:29:50 bernie
- *#* Rename timer_gettick() to timer_ticks().
- *#*
- *#* Revision 1.9 2004/08/08 06:06:20 bernie
- *#* Use new-style CONFIG_ idiom; Fix module-wide documentation.
- *#*
- *#* Revision 1.8 2004/07/29 22:57:09 bernie
- *#* ser_drain(): New function; Make Serial::is_open a debug-only feature; Switch to new-style CONFIG_* macros.
- *#*
- *#* Revision 1.7 2004/07/18 21:49:03 bernie
- *#* Make CONFIG_SER_DEFBAUDRATE optional.
- *#*
- *#* Revision 1.6 2004/06/07 15:56:28 aleph
- *#* Remove cast-as-lvalue extension abuse
- *#*
- *#* Revision 1.5 2004/06/06 16:41:44 bernie
- *#* ser_putchar(): Use fifo_push_locked() to fix potential race on 8bit processors.
- *#*
- *#* 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.
- *#*
- *#*/
-
#include "ser.h"
+#include "wdt.h"
#include "ser_p.h"
#include <mware/formatwr.h>
-#include <debug.h>
-#include <hw.h>
-#include <config.h>
+#include <cfg/debug.h>
+#include <appconfig.h>
/*
* Sanity check for config parameters required by this module.
/* Serial configuration parameters */
-#define SER_CTSDELAY 70 /*!< CTS line retry interval (ms) */
-#define SER_TXPOLLDELAY 2 /*!< Transmit buffer full retry interval (ms) */
-#define SER_RXPOLLDELAY 2 /*!< Receive buffer empty retry interval (ms) */
+#define SER_CTSDELAY 70 /**< CTS line retry interval (ms) */
+#define SER_TXPOLLDELAY 2 /**< Transmit buffer full retry interval (ms) */
+#define SER_RXPOLLDELAY 2 /**< Receive buffer empty retry interval (ms) */
struct Serial ser_handles[SER_CNT];
-/*!
+/**
* Inserisce il carattere c nel buffer di trasmissione.
* Questa funzione mette il processo chiamante in attesa
* quando il buffer e' pieno.
if (fifo_isfull_locked(&port->txfifo))
{
#if CONFIG_SER_TXTIMEOUT != -1
- time_t start_time = timer_ticks();
+ ticks_t start_time = timer_clock();
#endif
/* Attende finche' il buffer e' pieno... */
do
{
+ wdt_reset();
#if CONFIG_KERNEL && CONFIG_KERN_SCHED
/* Give up timeslice to other processes. */
proc_switch();
#endif
#if CONFIG_SER_TXTIMEOUT != -1
- if (timer_ticks() - start_time >= port->txtimeout)
+ if (timer_clock() - start_time >= port->txtimeout)
{
- port->status |= SERRF_TXTIMEOUT;
+ ATOMIC(port->status |= SERRF_TXTIMEOUT);
return EOF;
}
#endif /* CONFIG_SER_TXTIMEOUT */
fifo_push_locked(&port->txfifo, (unsigned char)c);
/* (re)trigger tx interrupt */
- port->hw->table->enabletxirq(port->hw);
+ port->hw->table->txStart(port->hw);
/* Avoid returning signed extended char */
return (int)((unsigned char)c);
}
-/*!
+/**
* Preleva un carattere dal buffer di ricezione.
* Questa funzione mette il processo chiamante in attesa
* quando il buffer e' vuoto. L'attesa ha un timeout
if (fifo_isempty_locked(&port->rxfifo))
{
#if CONFIG_SER_RXTIMEOUT != -1
- time_t start_time = timer_ticks();
+ ticks_t start_time = timer_clock();
#endif
/* Wait while buffer is empty */
do
{
+ wdt_reset();
#if CONFIG_KERNEL && CONFIG_KERN_SCHED
/* Give up timeslice to other processes. */
proc_switch();
#endif
#if CONFIG_SER_RXTIMEOUT != -1
- if (timer_ticks() - start_time >= port->rxtimeout)
+ if (timer_clock() - start_time >= port->rxtimeout)
{
- port->status |= SERRF_RXTIMEOUT;
+ ATOMIC(port->status |= SERRF_RXTIMEOUT);
return EOF;
}
#endif /* CONFIG_SER_RXTIMEOUT */
}
- while (fifo_isempty_locked(&port->rxfifo) && (port->status & SERRF_RX) == 0);
+ while (fifo_isempty_locked(&port->rxfifo) && (ser_getstatus(port) & SERRF_RX) == 0);
}
/*
* Get a byte from the FIFO (avoiding sign-extension),
* re-enable RTS, then return result.
*/
- if (port->status & SERRF_RX)
+ if (ser_getstatus(port) & SERRF_RX)
return EOF;
return (int)(unsigned char)fifo_pop_locked(&port->rxfifo);
}
-/*!
+/**
* Preleva un carattere dal buffer di ricezione.
* Se il buffer e' vuoto, ser_getchar_nowait() ritorna
* immediatamente EOF.
#if CONFIG_SER_GETS
-/*!
- * Read a line long at most as size and puts it
+/**
+ * Read a line long at most as size and put it
* in buf.
* \return number of chars read or EOF in case
* of error.
}
-/*!
+/**
* Read a line long at most as size and put it
* in buf, with optional echo.
*
#endif /* !CONFIG_SER_GETS */
-/*!
+/**
* Read at most \a size bytes from \a port and put them in \a buf
*
* \return number of bytes actually read, or EOF in
}
-/*!
+/**
* Write a string to serial.
* \return 0 if OK, EOF in case of error.
*/
}
-/*!
+/**
* \brief Write a buffer to serial.
*
* \return 0 if OK, EOF in case of error.
#if CONFIG_PRINTF
-/*!
+/**
* Formatted write
*/
int ser_printf(struct Serial *port, const char *format, ...)
#if CONFIG_SER_RXTIMEOUT != -1 || CONFIG_SER_TXTIMEOUT != -1
-void ser_settimeouts(struct Serial *port, time_t rxtimeout, time_t txtimeout)
+void ser_settimeouts(struct Serial *port, mtime_t rxtimeout, mtime_t txtimeout)
{
- port->rxtimeout = rxtimeout;
- port->txtimeout = txtimeout;
+ port->rxtimeout = ms_to_ticks(rxtimeout);
+ port->txtimeout = ms_to_ticks(txtimeout);
}
#endif /* CONFIG_SER_RXTIMEOUT || CONFIG_SER_TXTIMEOUT */
#if CONFIG_SER_RXTIMEOUT != -1
-/*!
+/**
* Discard input to resynchronize with remote end.
*
* Discard incoming data until the port stops receiving
*
* \note Serial errors are reset before and after executing the purge.
*/
-void ser_resync(struct Serial *port, time_t delay)
+void ser_resync(struct Serial *port, mtime_t delay)
{
- time_t old_rxtimeout = port->rxtimeout;
+ mtime_t old_rxtimeout = ticks_to_ms(port->rxtimeout);
- ser_settimeouts(port, delay, port->txtimeout);
+ ser_settimeouts(port, delay, ticks_to_ms(port->txtimeout));
do
{
ser_setstatus(port, 0);
/* Restore port to an usable status */
ser_setstatus(port, 0);
- ser_settimeouts(port, old_rxtimeout, port->txtimeout);
+ ser_settimeouts(port, old_rxtimeout, ticks_to_ms(port->txtimeout));
}
#endif /* CONFIG_SER_RXTIMEOUT */
void ser_setbaudrate(struct Serial *port, unsigned long rate)
{
- port->hw->table->setbaudrate(port->hw, rate);
+ port->hw->table->setBaudrate(port->hw, rate);
}
void ser_setparity(struct Serial *port, int parity)
{
- port->hw->table->setparity(port->hw, parity);
+ port->hw->table->setParity(port->hw, parity);
}
-/*!
+/**
* Flush both the RX and TX buffers.
*/
void ser_purge(struct Serial *port)
}
-/*!
+/**
* Wait until all pending output is completely
* transmitted to the other end.
*
*/
void ser_drain(struct Serial *ser)
{
- while (!fifo_isempty(&ser->txfifo))
+ /*
+ * Wait until the FIFO becomes empty, and then until the byte currently in
+ * the hardware register gets shifted out.
+ */
+ while (!fifo_isempty(&ser->txfifo)
+ || ser->hw->table->txSending(ser->hw))
{
#if CONFIG_KERNEL && CONFIG_KERN_SCHED
/* Give up timeslice to other processes. */
proc_switch();
#endif
+ wdt_reset();
}
}
-/*!
- * Initialize serial
+/**
+ * Initialize a serial port.
+ *
+ * \param unit Serial unit to open. Possible values are architecture dependant.
*/
struct Serial *ser_open(unsigned int unit)
{
}
-/*!
+/**
* Clean up serial port, disabling the associated hardware.
*/
void ser_close(struct Serial *port)
ASSERT(port->is_open);
DB(port->is_open = false;)
+ // Wait until we finish sending everything
+ ser_drain(port);
+
port->hw->table->cleanup(port->hw);
- port->hw = NULL;
+ DB(port->hw = NULL;)
+
+ /*
+ * We purge the FIFO buffer only after the low-level cleanup, so that
+ * we are sure that there are no more interrupts.
+ */
+ ser_purge(port);
}
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