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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 )
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; Move task's R1-R3 from IRQ stack to SVC stack
STMFDSP!, {R4-R6}
STMFDSP!, {R0}; Push task's R0onto task's stack
STMFDSP!, {R3}; Push task's CPSR (i.e. IRQ's SPSR)
LDRR0,OS_IntNesting; OSIntNesting++;
LDRBR1, [R0]
ADDR1, R1,#1
STRBR1, [R0]
CMPR1, #1; if (OSIntNesting == 1) {
BNEOS_CPU_IRQ_ISR_1
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