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Update Cortex-M3 and Cortex-M4F ports to allow the SysTick to be clocked at a different speed than the system clock (as is done in the recent STM32L demo. ).

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Add additional asserts and isb instructions into the Cortex-M3 and Cortex-M4F ports.
This commit is contained in:
Richard Barry 2013-12-12 14:07:20 +00:00
parent 6b3393b4b6
commit 0d1e12522b
10 changed files with 110 additions and 67 deletions
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7
FreeRTOS/Source/portable/Tasking/ARM_CM4F/port_asm.asm
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@ -73,6 +73,7 @@
_vector_14: .type func
mrs r0, psp
isb
;Get the location of the current TCB.
ldr.w r3, =pxCurrentTCB
@ -110,6 +111,7 @@ _vector_14: .type func
vldmiaeq r0!, {s16-s31}
msr psp, r0
isb
bx r14
.size _vector_14, $-_vector_14
@ -125,6 +127,7 @@ _vector_14: .type func
_lc_ref__vector_pp_14: .type func
mrs r0, psp
isb
;Get the location of the current TCB.
ldr.w r3, =pxCurrentTCB
@ -162,6 +165,7 @@ _lc_ref__vector_pp_14: .type func
vldmiaeq r0!, {s16-s31}
msr psp, r0
isb
push { lr }
pop { pc } ; XMC4000 specific errata workaround. Do not used "bx lr" here.
@ -181,6 +185,7 @@ SVC_Handler: .type func
;Pop the core registers.
ldmia r0!, {r4-r11, r14}
msr psp, r0
isb
mov r0, #0
msr basepri, r0
bx r14
@ -201,6 +206,8 @@ vPortStartFirstTask .type func
msr msp, r0
;Call SVC to start the first task.
cpsie i
dsb
isb
svc 0
.size vPortStartFirstTask, $-vPortStartFirstTask
.endsec