Fix spacing

[bertos.git] / drv / timer_avr.h

diff --git a/drv/timer_avr.h b/drv/timer_avr.h
index 15bf8730f476ce61dc7b11eb45bd1c94c5635fe7..24db1bcf8102d33d68809b2f5c809a489d3a55a6 100755 (executable)
--- a/drv/timer_avr.h
+++ b/drv/timer_avr.h
@@ -15,6 +15,18 @@
 
 /*
  * $Log$
+ * Revision 1.11  2004/08/03 15:53:17  aleph
+ * Fix spacing
+ *
+ * Revision 1.10  2004/08/02 20:20:29  aleph
+ * Merge from project_ks
+ *
+ * Revision 1.9  2004/07/22 02:01:14  bernie
+ * Use TIMER_PRESCALER consistently.
+ *
+ * Revision 1.8  2004/07/20 23:50:20  bernie
+ * Also define TIMER_PRESCALER.
+ *
  * Revision 1.7  2004/07/20 23:49:40  bernie
  * Compute value of OCR_DIVISOR from CLOCK_FREQ.
  *
@@ -49,7 +61,10 @@
 #endif
 
 
-#define timer_hw_irq()  /* Not needed, IRQ timer flag cleared automatically */
+/* Not needed, IRQ timer flag cleared automatically */
+#define timer_hw_irq() do {} while (0)
+
+#define TIMER_PRESCALER 64
 
 /*!
  * System timer: additional division after the prescaler
@@ -72,10 +87,15 @@
                TIFR = BV(OCF0) | BV(TOV0);
 
                /* Setup Timer/Counter interrupt */
-               ASSR = 0x00;                  /* internal system clock */
-               TCCR0 = BV(WGM01) | BV(CS02); /* Clear on Compare match & prescaler = 64. When changing
-                                                prescaler change TIMER_HW_HPTICKS_PER_SEC too */
-               TCNT0 = 0x00;                 /* initialization of Timer/Counter */
+               ASSR = 0x00;                  /* Internal system clock */
+               TCCR0 = BV(WGM01)             /* Clear on Compare match */
+                       #if TIMER_PRESCALER == 64
+                               | BV(CS02)
+                       #else
+                               #error Unsupported value of TIMER_PRESCALER
+                       #endif
+               ;
+               TCNT0 = 0x00;                 /* Initialization of Timer/Counter */
                OCR0 = OCR_DIVISOR;           /* Timer/Counter Output Compare Register */
 
                /* Enable timer interrupts: Timer/Counter2 Output Compare (OCIE2) */
@@ -86,7 +106,7 @@
        }
 
        //! Frequency of the hardware high precision timer
-       #define TIMER_HW_HPTICKS_PER_SEC  (CLOCK_FREQ / 64)
+       #define TIMER_HW_HPTICKS_PER_SEC  (CLOCK_FREQ / TIMER_PRESCALER)
 
        INLINE hptime_t timer_hw_hpread(void)
        {
@@ -143,7 +163,13 @@
                TIFR = BV(OCF2) | BV(TOV2);
 
                /* Setup Timer/Counter interrupt */
-               TCCR2 = BV(WGM21) | BV(CS21) | BV(CS20);
+               TCCR2 = BV(WGM21)
+                       #if TIMER_PRESCALER == 64
+                               | BV(CS21) | BV(CS20)
+                       #else
+                               #error Unsupported value of TIMER_PRESCALER
+                       #endif
+               ;
                /* Clear on Compare match & prescaler = 64, internal sys clock.
                   When changing prescaler change TIMER_HW_HPTICKS_PER_SEC too */
                TCNT2 = 0x00;         /* initialization of Timer/Counter */
@@ -157,7 +183,7 @@
        }
 
        //! Frequency of the hardware high precision timer
-       #define TIMER_HW_HPTICKS_PER_SEC  (CLOCK_FREQ / 64)
+       #define TIMER_HW_HPTICKS_PER_SEC  (CLOCK_FREQ / TIMER_PRESCALER)
 
        INLINE hptime_t timer_hw_hpread(void)
        {