uc_os2 for arm详解

uc_os2 for arm详解C/OS-II for ARM Processors
(Supplement to AN-1014) ARM and Thumb Mode

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Legend
A red line shows data being copied.
LOW Memory
CPSR R0 R1 R2 R3 R4 OSTCBStkPtr R0 R1 R2

Task’s OS_TCB

R3 R4 R5 R6

A black line indicates a pointer.

R7 R8 R9

Stack Growth

R5 R6 R7 R8 R9 R10 R11 R12

CPU Registers SVC Mode

Registers in beige are common registers. Registers in blue are mode specific registers.

R10 R11 R12 R13_svc (SP) R14_svc (LR)

HIGH Memory

R14_svc (LR) PC

As a convention, we will show stack growth going from the bottom of the page up to show that items are stacked one on top of the other.

R15 (PC) CPSR SPSR_svc

Task Stack
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C/OS-II C/OS-II Port Port for for ARM ARM Processors Processors