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将FreeRTOS从V7.5.2升级到V8.0.0，同时将STemWin升级到5.22， F4固件库升级到1.3.0
新升级后的例子有个警告：
..\..\FreeRTOS\portable\RVDS\ARM_CM4F\port.c(490): warning: A1581W: Added 2 bytes of padding at address 0xa2
消除这个警告的话，可以在提示的位置加上一个nop指令，上面16个历程中没有加NOP指令，也就是说这个警告是保留的，主要是
考虑到保持源码，不做任何的修改。
__asm void xPortPendSVHandler( void )
{
extern uxCriticalNesting;
extern pxCurrentTCB;
extern vTaskSwitchContext;
PRESERVE8
mrs r0, psp
isb
/* Get the location of the current TCB. */
ldr r3, =pxCurrentTCB
ldr r2, [r3]
/* Is the task using the FPU context? If so, push high vfp registers. */
tst r14, #0x10
it eq
vstmdbeq r0!, {s16-s31}
/* Save the core registers. */
stmdb r0!, {r4-r11, r14}
/* Save the new top of stack into the first member of the TCB. */
str r0, [r2]
stmdb sp!, {r3}
mov r0, #configMAX_SYSCALL_INTERRUPT_PRIORITY
msr basepri, r0
bl vTaskSwitchContext
mov r0, #0
msr basepri, r0
ldmia sp!, {r3}
/* The first item in pxCurrentTCB is the task top of stack. */
ldr r1, [r3]
ldr r0, [r1]
/* Pop the core registers. */
ldmia r0!, {r4-r11, r14}
/* Is the task using the FPU context? If so, pop the high vfp registers
too. */
tst r14, #0x10
it eq
vldmiaeq r0!, {s16-s31}
msr psp, r0
isb
#ifdef WORKAROUND_PMU_CM001 /* XMC4000 specific errata */
#if WORKAROUND_PMU_CM001 == 1
push { r14 }
pop { pc }
nop
#endif
#endif
bx r14
nop
nop //在这里添加一个NOP指令
}
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发表于 2014-2-24 15:44:41
楼主
发表于 2015-4-28 17:45:59
