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Diffstat (limited to 'include/configs/EP1S10.h')
-rw-r--r--include/configs/EP1S10.h14
1 files changed, 8 insertions, 6 deletions
diff --git a/include/configs/EP1S10.h b/include/configs/EP1S10.h
index 498f26d..bfbf8c1 100644
--- a/include/configs/EP1S10.h
+++ b/include/configs/EP1S10.h
@@ -119,14 +119,16 @@
* TIMEBASE --
*
* The high res timer defaults to 1 msec. Since it includes the period
- * registers, we can slow it down to 10 msec using TMRCNT. If the default
- * period is acceptable, TMRCNT can be left undefined.
+ * registers, the interrupt frequency can be reduced using TMRCNT.
+ * If the default period is acceptable, TMRCNT can be left undefined.
+ * TMRMS represents the desired mecs per tick (msecs per interrupt).
*----------------------------------------------------------------------*/
+#define CONFIG_SYS_HZ 1000 /* Always 1000 */
#define CONFIG_SYS_NIOS_TMRBASE 0x02120820 /* Tick timer base addr */
-#define CONFIG_SYS_NIOS_TMRIRQ 3 /* Timer IRQ num */
-#define CONFIG_SYS_NIOS_TMRMS 10 /* 10 msec per tick */
-#define CONFIG_SYS_NIOS_TMRCNT (CONFIG_SYS_NIOS_TMRMS * (CONFIG_SYS_CLK_FREQ/1000))
-#define CONFIG_SYS_HZ (CONFIG_SYS_CLK_FREQ/(CONFIG_SYS_NIOS_TMRCNT + 1))
+#define CONFIG_SYS_NIOS_TMRIRQ 3 /* Timer IRQ num */
+#define CONFIG_SYS_NIOS_TMRMS 10 /* Desired period (msec)*/
+#define CONFIG_SYS_NIOS_TMRCNT \
+ (CONFIG_SYS_NIOS_TMRMS * (CONFIG_SYS_CLK_FREQ/1000))
/*------------------------------------------------------------------------
* STATUS LED -- Provides a simple blinking led. For Nios2 each board