Changeset 4ca27cf in rtems for c/src/lib/libbsp/i386/go32/timer/timer.c

Timestamp:

07/18/95 21:19:53 (28 years ago)

Author:

Joel Sherrill <joel.sherrill@…>

Branches:

4.10, 4.11, 4.8, 4.9, 5, master

Children:

3b170f5

Parents:

3ea5288

Message:

committing for rtems-3.2.01 snapshot

File:

• c/src/lib/libbsp/i386/go32/timer/timer.c (modified) (4 diffs)

c/src/lib/libbsp/i386/go32/timer/timer.c

@@ -23 +23 @@
 
 #include <rtems.h>
-#include <cpu.h>
 #include <bsp.h>
 
@@ -48 +47 @@
     static int First = 1;
     if ( First )  {
-        /* install ISR */
-        set_vector( timerisr, 0x8, 0 );
+        /* install ISR */
+        set_vector( timerisr, 0x8, 0 );
 
-        /* Wait for ISR to be called at least once */
-        Ttimer_val = 0;
-        while ( Ttimer_val == 0 )
-            continue;
+        /* Wait for ISR to be called at least once */
+        Ttimer_val = 0;
+        while ( Ttimer_val == 0 )
+            continue;
 
-        /* load timer for 250 microsecond period */
-        outport_byte( TIMER_MODE, TIMER_SEL0|TIMER_16BIT|TIMER_RATEGEN );
-        outport_byte( TIMER_CNTR0, US_TO_TICK(250) >> 0 & 0xff);
-        outport_byte( TIMER_CNTR0, US_TO_TICK(250) >> 8 & 0xff);
+        /* load timer for 250 microsecond period */
+        outport_byte( TIMER_MODE, TIMER_SEL0|TIMER_16BIT|TIMER_RATEGEN );
+        outport_byte( TIMER_CNTR0, US_TO_TICK(250) >> 0 & 0xff);
+        outport_byte( TIMER_CNTR0, US_TO_TICK(250) >> 8 & 0xff);
 
-        First = 0;
+        First = 0;
     }
     Ttimer_val = 0;                           /* clear timer ISR count */
@@ -67 +66 @@
 }
 
-#define AVG_OVERHEAD       0  /* 0.1 microseconds to start/stop timer. */
-#define LEAST_VALID        1  /* Don't trust a value lower than this */
+#define AVG_OVERHEAD       0  /* 0.1 microseconds to start/stop timer. */
+#define LEAST_VALID        1  /* Don't trust a value lower than this */
 
 
@@ -87 +86 @@
 
     if ( Timer_driver_Find_average_overhead == 1 )
-        return total;
+        return total;
     else if ( total < LEAST_VALID )
-        return 0;               /* below timer resolution */
+        return 0;               /* below timer resolution */
     else
-        return total - AVG_OVERHEAD;
+        return total - AVG_OVERHEAD;
 }