中断控制器中的"中断disable命令寄存器"和 "中断clear命令寄存器"之间有什么区别?
在阅读某硬件手册(AT91SAM9263)中断控制器部分时留意到它包括2个寄存器:
* interrupt disable command register
FIQ, SYS, PID2-PID31: Interrupt Disable
0 = No effect
1 = Disables corresopnding interrupt
* interrupt clear command register
FIQ, SYS, PID2-PID31: Interrupt Clear
0 = No effect.
1 = Clears corresponding interrupt
interrupt disable command register 和 interrupt clear command register 感觉很相似,不是很明白它们之间的区别。能给一些你们的理解吗?