cpu_relax(): New function.

[bertos.git] / bertos / drv / ser.c

diff --git a/bertos/drv/ser.c b/bertos/drv/ser.c
index 5f2b6fcd66af4298bdae8d95891c31276854ed57..cbcc33a388d9bdc435e2408f0de2950f2fde2134 100644 (file)
--- a/bertos/drv/ser.c
+++ b/bertos/drv/ser.c
@@ -60,7 +60,9 @@
 
 #include <mware/formatwr.h>
 
-#include <string.h> /* memset */
+#include <cpu/power.h> /* cpu_relax() */
+
+#include <string.h> /* memset() */
 
 /*
  * Sanity check for config parameters required by this module.
@@ -78,16 +80,6 @@
        #error CONFIG_SER_DEFBAUDRATE missing in config.h
 #endif
 
-#if CONFIG_KERNEL && CONFIG_KERN_SCHED
-       #include <kern/proc.h>
-#else
-       #define proc_yield() do {} while(0)
-#endif
-
-#if CONFIG_SER_TXTIMEOUT != -1 || CONFIG_SER_RXTIMEOUT != -1
-       #include <drv/timer.h>
-#endif
-
 
 struct Serial *ser_handles[SER_CNT];
 
@@ -114,9 +106,7 @@ static int ser_putchar(int c, struct Serial *port)
                /* Wait while buffer is full... */
                do
                {
-                       /* Give up timeslice to other processes. */
-                       proc_yield();
-                       wdt_reset();
+                       cpu_relax();
 
 #if CONFIG_SER_TXTIMEOUT != -1
                        if (timer_clock() - start_time >= port->txtimeout)
@@ -162,9 +152,7 @@ static int ser_getchar(struct Serial *port)
                /* Wait while buffer is empty */
                do
                {
-                       /* Give up timeslice to other processes. */
-                       proc_yield();
-                       wdt_reset();
+                       cpu_relax();
 
 #if CONFIG_SER_RXTIMEOUT != -1
                        if (timer_clock() - start_time >= port->rxtimeout)
@@ -354,11 +342,7 @@ static int ser_flush(struct KFile *fd)
         */
        while (!fifo_isempty(&fds->txfifo)
               || fds->hw->table->txSending(fds->hw))
-       {
-                       /* Give up timeslice to other processes. */
-                       proc_yield();
-                       wdt_reset();
-       }
+               cpu_relax();
        return 0;
 }