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uC/OSII移植步驟

作者: 時(shí)間:2016-10-08 來源:網(wǎng)絡(luò) 收藏
SP, SP,#12; Adjust IRQ 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
; SAVE TASK'S CONTEXT ONTO TASK'S STACK
STMFDSP!, {R2}; Push task's Return PC
STMFDSP!, {LR}; Push task's LR
STMFDSP!, {R4-R12}; Push task's R12-R4
LDMFDR1!, {R4-R6}


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