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Corrected SysTick interval calculation.

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This commit is contained in:
Richard Barry 2008-04-06 09:25:59 +00:00
parent 7ed94acdff
commit 2ca3985a8c
1 changed files with 1 additions and 1 deletions
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Source/portable/IAR/ARM_CM3/port.c
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@ -200,7 +200,7 @@ 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;
}
/*-----------------------------------------------------------*/