MSP430中这两个函数的关系

只看该作者 · 2010-12-17 14:03

__bic_SR_register()与__bic_SR_register_on_exit()这两个本征函数的异同点

只看该作者 · 2010-12-17 15:11

__bic_SR_register_on_exit
Syntax
void __bic_SR_register_on_exit(unsigned short);
Description
Clears bits in the processor status register when an interrupt or monitor function returns. The function takes an integer as its argument, that is, a bit mask with the bits to be cleared.
This intrinsic function is only available in interrupt and monitor functions.

__bic_SR_register
Syntax
void __bic_SR_register(unsigned short);
Description
Clears bits in the processor status register. The function takes an integer as its argument, that is, a bit mask with the bits to be cleared.

__bic_SR_register_on_exit()是在中断程序里面使用的，中断返回时执行。