From: richardbarry <richardbarry@1d2547de-c912-0410-9cb9-b8ca96c0e9e2>
Date: Sun, 6 Apr 2008 09:25:00 +0000 (+0000)
Subject: Corrected SysTick interval calculation.
X-Git-Tag: V5.0.0~32
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=6007d6a8112cc4f8cc3368a052ff8fda5150f6dd;p=freertos

Corrected SysTick interval calculation.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@292 1d2547de-c912-0410-9cb9-b8ca96c0e9e2
---

diff --git a/Source/portable/GCC/ARM_CM3/port.c b/Source/portable/GCC/ARM_CM3/port.c
index cc3568fde..eb0e03340 100644
--- a/Source/portable/GCC/ARM_CM3/port.c
+++ b/Source/portable/GCC/ARM_CM3/port.c
@@ -276,7 +276,7 @@ void xPortSysTickHandler( void )
 void prvSetupTimerInterrupt( void )
 {
 	/* Configure SysTick to interrupt at the requested rate. */
-	*(portNVIC_SYSTICK_LOAD) = configCPU_CLOCK_HZ / configTICK_RATE_HZ;
+	*(portNVIC_SYSTICK_LOAD) = ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ) - 1UL;
 	*(portNVIC_SYSTICK_CTRL) = portNVIC_SYSTICK_CLK | portNVIC_SYSTICK_INT | portNVIC_SYSTICK_ENABLE;
 }
 /*-----------------------------------------------------------*/