Add missing header.

[bertos.git] / drv / ser.c

diff --git a/drv/ser.c b/drv/ser.c
index d88b0425689d69ffe3ae77aae1210c16052ba0ef..52e5652eb0b89074ceaa01e1b62e9db5d5c11316 100755 (executable)
--- a/drv/ser.c
+++ b/drv/ser.c
@@ -16,9 +16,9 @@
  * 38400bps on a 16MHz 80196.
  *
  * MODULE CONFIGURATION
- *     \li \c CONFIG_SER_HWHANDSHAKE define this preprocessor symbol to enable
- *     support for RTS/CTS handshake. Support is incomplete/untested
- *     for 80196.
+ *
+ *  \li \c CONFIG_SER_HWHANDSHAKE - set to 1 to enable RTS/CTS handshake.
+ *         Support is incomplete/untested.
  *  \li \c CONFIG_SER_TXTIMEOUT - Enable software serial transmission timeouts
  *
  *
@@ -28,6 +28,18 @@
 
 /*
  * $Log$
+ * 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.
  *
@@ -87,18 +99,18 @@ int ser_putchar(int c, struct Serial *port)
        if (fifo_isfull_locked(&port->txfifo))
        {
 #if CONFIG_SER_TXTIMEOUT != -1
-               time_t start_time = timer_gettick();
+               time_t start_time = timer_ticks();
 #endif
 
                /* Attende finche' il buffer e' pieno... */
                do
                {
-#ifdef CONFIG_KERN_SCHED
+#if defined(CONFIG_KERN_SCHED) && CONFIG_KERN_SCHED
                        /* Give up timeslice to other processes. */
                        proc_switch();
 #endif
 #if CONFIG_SER_TXTIMEOUT != -1
-                       if (timer_gettick() - start_time >= port->txtimeout)
+                       if (timer_ticks() - start_time >= port->txtimeout)
                        {
                                port->status |= SERRF_TXTIMEOUT;
                                return EOF;
@@ -134,7 +146,7 @@ int ser_getchar(struct Serial *port)
        if (fifo_isempty_locked(&port->rxfifo))
        {
 #if CONFIG_SER_RXTIMEOUT != -1
-               time_t start_time = timer_gettick();
+               time_t start_time = timer_ticks();
 #endif
                /* Wait while buffer is empty */
                do
@@ -144,7 +156,7 @@ int ser_getchar(struct Serial *port)
                        proc_switch();
 #endif
 #if CONFIG_SER_RXTIMEOUT != -1
-                       if (timer_gettick() - start_time >= port->rxtimeout)
+                       if (timer_ticks() - start_time >= port->rxtimeout)
                        {
                                port->status |= SERRF_RXTIMEOUT;
                                return EOF;
@@ -313,6 +325,33 @@ void ser_settimeouts(struct Serial *port, time_t rxtimeout, time_t 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
+ * characters for at least \a delay milliseconds.
+ *
+ * \note Serial errors are reset before and after executing the purge.
+ */
+void ser_resync(struct Serial *port, time_t delay)
+{
+       time_t old_rxtimeout = port->rxtimeout;
+
+       ser_settimeouts(delay, ser->txtimeout);
+       do
+       {
+               ser_setstatus(port, 0);
+               ser_getchar(port);
+       }
+       while (!(ser_getstatus(port) & SERRF_RXTIMEOUT));
+
+       /* Restore port to an usable status */
+       ser_setstatus(port, 0);
+       ser_settimeouts(old_rxtimeout, ser->txtimeout);
+}
+#endif /* CONFIG_SER_RXTIMEOUT */
+
 
 void ser_setbaudrate(struct Serial *port, unsigned long rate)
 {
@@ -329,12 +368,13 @@ void ser_setparity(struct Serial *port, int parity)
 /*!
  * Flush both the RX and TX buffers.
  */
-void ser_purge(struct Serial *ser)
+void ser_purge(struct Serial *port)
 {
-       fifo_flush_locked(&ser->rxfifo);
-       fifo_flush_locked(&ser->txfifo);
+       fifo_flush_locked(&port->rxfifo);
+       fifo_flush_locked(&port->txfifo);
 }
 
+
 /*!
  * Wait until all pending output is completely
  * transmitted to the other end.
@@ -345,7 +385,7 @@ void ser_purge(struct Serial *ser)
  */
 void ser_drain(struct Serial *ser)
 {
-       while(!fifo_isempty(&ser->txfifo))
+       while (!fifo_isempty(&ser->txfifo))
        {
 #if defined(CONFIG_KERN_SCHED) && CONFIG_KERN_SCHED
                        /* Give up timeslice to other processes. */