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Update port layers to make better use of the xTaskIncrementTick() return value.

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This commit is contained in:
Richard Barry 2013-06-08 18:36:25 +00:00
parent c75c01ffdf
commit 62c0ae0926
9 changed files with 124 additions and 102 deletions
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11
FreeRTOS/Source/portable/IAR/AtmelSAM7S64/portasm.s79
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@ -74,10 +74,10 @@ vPortStartFirstTask:
; Manual context switch function. This is the SWI hander.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
vPortYieldProcessor:
ADD LR, LR, #4 ; Add 4 to the LR to make the LR appear exactly
; as if the context was saved during and IRQ
ADD LR, LR, #4 ; Add 4 to the LR to make the LR appear exactly
; as if the context was saved during and IRQ
; handler.
portSAVE_CONTEXT ; Save the context of the current task...
LDR R0, =vTaskSwitchContext ; before selecting the next task to execute.
mov lr, pc
@ -94,10 +94,13 @@ vPortPreemptiveTick:
LDR R0, =xTaskIncrementTick ; Increment the tick count - this may wake a task.
mov lr, pc
BX R0
CMP R0, #0
BEQ SkipContextSwitch
LDR R0, =vTaskSwitchContext ; Select the next task to execute.
mov lr, pc
BX R0
SkipContextSwitch
LDR R14, =AT91C_BASE_PITC ; Clear the PIT interrupt
LDR R0, [R14, #PITC_PIVR ]