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Update PIC32 demo application to remove reliance on PLIB functions.

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Update the default low power implementation in all the Cortex-M port layers to add a small critical section.
This commit is contained in:
Richard Barry 2013-02-18 16:41:11 +00:00
parent c519ba094d
commit 902f9e1a58
22 changed files with 649 additions and 156 deletions
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27
FreeRTOS/Source/portable/RVDS/ARM_CM3/port.c
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@ -363,19 +363,28 @@ void xPortSysTickHandler( void )
kernel with respect to calendar time. */
portNVIC_SYSTICK_CTRL_REG = portNVIC_SYSTICK_CLK_BIT | portNVIC_SYSTICK_INT_BIT;
/* If a context switch is pending then abandon the low power entry as
the context switch might have been pended by an external interrupt that
requires processing. */
if( ( portNVIC_INT_CTRL_REG & portNVIC_PENDSVSET_BIT ) != 0 )
/* Adjust the reload value to take into account that the current
time slice is already partially complete. */
ulReloadValue += ( portNVIC_SYSTICK_LOAD_REG - ( portNVIC_SYSTICK_LOAD_REG - portNVIC_SYSTICK_CURRENT_VALUE_REG ) );
/* Enter a critical section but don't use the taskENTER_CRITICAL()
method as that will mask interrupts that should exit sleep mode. */
__disable_irq();
/* If a context switch is pending or a task is waiting for the scheduler
to be unsuspended then abandon the low power entry. */
if( eTaskConfirmSleepModeStatus() == eAbortSleep )
{
/* Restart SysTick. */
portNVIC_SYSTICK_CTRL_REG = portNVIC_SYSTICK_CLK_BIT | portNVIC_SYSTICK_INT_BIT | portNVIC_SYSTICK_ENABLE_BIT;
/* Re-enable interrupts - see comments above __disable_irq() call
above. */
__enable_irq();
}
else
{
/* Adjust the reload value to take into account that the current
time slice is already partially complete. */
ulReloadValue += ( portNVIC_SYSTICK_LOAD_REG - ( portNVIC_SYSTICK_LOAD_REG - portNVIC_SYSTICK_CURRENT_VALUE_REG ) );
/* Set the new reload value. */
portNVIC_SYSTICK_LOAD_REG = ulReloadValue;
/* Clear the SysTick count flag and set the count value back to
@ -404,6 +413,10 @@ void xPortSysTickHandler( void )
kernel with respect to calendar time. */
portNVIC_SYSTICK_CTRL_REG = portNVIC_SYSTICK_CLK_BIT | portNVIC_SYSTICK_INT_BIT;
/* Re-enable interrupts - see comments above __disable_irq() call
above. */
__enable_irq();
if( ( portNVIC_SYSTICK_CTRL_REG & portNVIC_SYSTICK_COUNT_FLAG_BIT ) != 0 )
{
/* The tick interrupt has already executed, and the SysTick