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Continued work in progress on new demo.

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This commit is contained in:
Richard Barry 2008-11-28 16:08:59 +00:00
parent c5f0933f49
commit 2f795214d7
2 changed files with 23 additions and 58 deletions
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24
Source/portable/IAR/AtmelSAM9XE/portasm.s79
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@ -2,10 +2,8 @@
CODE32
EXTERN vTaskSwitchContext
EXTERN vTaskIncrementTick
PUBLIC vPortYieldProcessor
PUBLIC vPortPreemptiveTick
PUBLIC vPortStartFirstTask
#include "ISR_Support.h"
@ -31,28 +29,6 @@ vPortYieldProcessor:
BX R0
portRESTORE_CONTEXT ; Restore the context of the selected task.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Preemptive context switch function. This will only ever get installed if
; portUSE_PREEMPTION is set to 1 in portmacro.h.
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
vPortPreemptiveTick:
portSAVE_CONTEXT ; Save the context of the current task.
LDR R0, =vTaskIncrementTick ; Increment the tick count - this may wake a task.
mov lr, pc
BX R0
LDR R0, =vTaskSwitchContext ; Select the next task to execute.
mov lr, pc
BX R0
#if 0
LDR R14, =AT91C_BASE_PITC ; Clear the PIT interrupt
LDR R0, [R14, #PITC_PIVR ]
LDR R14, =AT91C_BASE_AIC ; Mark the End of Interrupt on the AIC
STR R14, [R14, #AIC_EOICR]
#endif
portRESTORE_CONTEXT ; Restore the context of the selected task.
END