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uC/OSII移植步驟

作者： 時(shí)間：2016-10-08 來(lái)源：網(wǎng)絡(luò) 收藏
; Pop new task's CPSR
MSRSPSR_cxsf, R4
LDMFDSP!, {R0-R12,LR,PC}^; Pop new task's context
RSEG CODE:CODE:NOROOT(2)
CODE32
OS_CPU_FIQ_ISR
STMFDSP!, {R1-R3}; PUSH WORKING REGISTERS ONTO FIQ STACK
MOVR1, SP; SaveFIQ stack pointer
ADDSP, SP,#12; Adjust FIQ stack pointer
SUBR2, LR,#4; Adjust PC for return address to task
MRSR3, SPSR; Copy SPSR (i.e. interrupted task's CPSR) to R3
MSRCPSR_c, #(NO_INT | SVC32_MODE) ; Change to SVC mode

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