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Corrected SysTick interval calculation.

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This commit is contained in:
Richard Barry 2008-04-06 09:25:00 +00:00
parent cfcad6e78a
commit 7ed94acdff
1 changed files with 1 additions and 1 deletions
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Source/portable/GCC/ARM_CM3/port.c
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@ -276,7 +276,7 @@ void xPortSysTickHandler( void )
void prvSetupTimerInterrupt( void ) void prvSetupTimerInterrupt( void )
{ {
/* Configure SysTick to interrupt at the requested rate. */ /* 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; *(portNVIC_SYSTICK_CTRL) = portNVIC_SYSTICK_CLK | portNVIC_SYSTICK_INT | portNVIC_SYSTICK_ENABLE;
} }
/*-----------------------------------------------------------*/ /*-----------------------------------------------------------*/