微處理器 - NXP LPC2103 - Enable Interrupt

參考資訊：
https://matrix108.wordpress.com/2007/12/15/arm-assembler/
https://perswww.kuleuven.be/~u0068190/ARM7/lpc-ARM-book_srn.pdf
https://www.ic.unicamp.br/~celio/mc404-2013/arm-manuals/ARM_exception_slides.pdf

暫存器


Enable Interrupt

mrs r0, cpsr
bic r0, #0x80
msr cpsr_c, r0

Disable Interrupt

mrs r0, cpsr
orr r0, #0x80
msr cpsr_c, r0