小弟想学单片机底层的东西,该从哪里入手?

只看该作者 · 2015-8-17 14:48

本帖最后由 liuchang890811 于 2015-8-21 08:36 编辑

如题:小弟最近在stm32板上上ucos,想了解下单片机关于底层方面的知识,例如堆栈,中断,指令集方面的东西,就像下面的这种我应该需要看哪些方面的书籍或者资料啊,恳请大神指教~~~

OS_CPU_PendSVHandler
CPSID I                                                 ; Prevent interruption during context switch
MRS    R0, PSP                                           ; PSP is process stack pointer
CBZ    R0, OS_CPU_PendSVHandler_nosave                   ; Skip register save the first time

SUBS R0, R0, #0x20                                     ; Save remaining regs r4-11 on process stack
STM    R0, {R4-R11}

LDR    R1, =OSTCBCur                                     ; OSTCBCur->OSTCBStkPtr = SP;
LDR    R1, [R1]
STR    R0, [R1]                                           ; R0 is SP of process being switched out