* <!--
* Copyright 2003, 2004 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.
+ * This file is part of DevLib - See README.devlib for information.
* -->
*
* \brief Buffered serial I/O driver
/*#*
*#* $Log$
+ *#* Revision 1.29 2006/05/18 00:39:30 bernie
+ *#* ser_open(): Document a bit more.
+ *#*
+ *#* Revision 1.28 2006/02/17 22:23:06 bernie
+ *#* Update POSIX serial emulator.
+ *#*
+ *#* Revision 1.27 2005/11/27 23:33:40 bernie
+ *#* Use appconfig.h instead of cfg/config.h.
+ *#*
+ *#* Revision 1.26 2005/11/04 16:20:02 bernie
+ *#* Fix reference to README.devlib in header.
+ *#*
+ *#* Revision 1.25 2005/04/11 19:10:27 bernie
+ *#* Include top-level headers from cfg/ subdir.
+ *#*
+ *#* Revision 1.24 2005/01/21 20:13:15 aleph
+ *#* Fix drain at ser_close()
+ *#*
+ *#* Revision 1.23 2005/01/14 00:47:07 aleph
+ *#* ser_drain(): Wait for hw transmission complete.
+ *#*
+ *#* Revision 1.22 2004/12/08 08:56:14 bernie
+ *#* Rename time_t to mtime_t.
+ *#*
+ *#* 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.
*#*
*#*
*#*/
-#include <mware/formatwr.h>
-#include <debug.h>
#include "ser.h"
#include "ser_p.h"
-#include "hw.h"
+#include <mware/formatwr.h>
+#include <cfg/debug.h>
+//#include <hw.h>
+#include <appconfig.h>
-#ifdef CONFIG_KERNEL
+/*
+ * Sanity check for config parameters required by this module.
+ */
+#if !defined(CONFIG_KERNEL) || ((CONFIG_KERNEL != 0) && CONFIG_KERNEL != 1)
+ #error CONFIG_KERNEL must be set to either 0 or 1 in config.h
+#endif
+#if !defined(CONFIG_SER_RXTIMEOUT)
+ #error CONFIG_SER_TXTIMEOUT missing in config.h
+#endif
+#if !defined(CONFIG_SER_RXTIMEOUT)
+ #error CONFIG_SER_RXTIMEOUT missing in config.h
+#endif
+#if !defined(CONFIG_SER_GETS) || ((CONFIG_SER_GETS != 0) && CONFIG_SER_GETS != 1)
+ #error CONFIG_SER_GETS must be set to either 0 or 1 in config.h
+#endif
+#if !defined(CONFIG_SER_DEFBAUDRATE)
+ #error CONFIG_SER_DEFBAUDRATE missing in config.h
+#endif
+#if !defined(CONFIG_PRINTF)
+ #error CONFIG_PRINTF missing in config.h
+#endif
+
+#if CONFIG_KERNEL
#include <kern/proc.h>
#endif
+
#if CONFIG_SER_TXTIMEOUT != -1 || CONFIG_SER_RXTIMEOUT != -1
#include <drv/timer.h>
#endif
if (fifo_isfull_locked(&port->txfifo))
{
#if CONFIG_SER_TXTIMEOUT != -1
- time_t start_time = timer_ticks();
+ mtime_t start_time = timer_ticks();
#endif
/* Attende finche' il buffer e' pieno... */
do
{
-#if defined(CONFIG_KERN_SCHED) && CONFIG_KERN_SCHED
+#if CONFIG_KERNEL && CONFIG_KERN_SCHED
/* Give up timeslice to other processes. */
proc_switch();
#endif
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);
if (fifo_isempty_locked(&port->rxfifo))
{
#if CONFIG_SER_RXTIMEOUT != -1
- time_t start_time = timer_ticks();
+ mtime_t start_time = timer_ticks();
#endif
/* Wait while buffer is empty */
do
{
-#if defined(CONFIG_KERN_SCHED) && CONFIG_KERN_SCHED
+#if CONFIG_KERNEL && CONFIG_KERN_SCHED
/* Give up timeslice to other processes. */
proc_switch();
#endif
#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.
#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;
*
* \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 = port->rxtimeout;
ser_settimeouts(port, delay, port->txtimeout);
do
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);
}
*/
void ser_drain(struct Serial *ser)
{
- while (!fifo_isempty(&ser->txfifo))
+ /*
+ * Wait until the FIFO is 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 defined(CONFIG_KERN_SCHED) && CONFIG_KERN_SCHED
+ #if CONFIG_KERNEL && CONFIG_KERN_SCHED
/* Give up timeslice to other processes. */
proc_switch();
-#endif
+ #endif
}
}
/*!
- * Initialize serial
+ * Initialize a serial port.
+ *
+ * \param unit Serial unit to open. Possible values are architecture dependant.
*/
struct Serial *ser_open(unsigned int unit)
{
ser_setbaudrate(port, CONFIG_SER_DEFBAUDRATE);
#endif
+ /* Clear error flags */
+ ser_setstatus(port, 0);
+
return 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);
}
projects / bertos.git / blobdiff