ZHCU032K December 2004 – August 2022 MSP430AFE221 , MSP430AFE222 , MSP430AFE223 , MSP430AFE231 , MSP430AFE232 , MSP430AFE233 , MSP430AFE251 , MSP430AFE252 , MSP430AFE253 , MSP430F2001 , MSP430F2002 , MSP430F2003 , MSP430F2011 , MSP430F2012 , MSP430F2013 , MSP430F2101 , MSP430F2111 , MSP430F2112 , MSP430F2121 , MSP430F2122 , MSP430F2131 , MSP430F2132 , MSP430F2132-EP , MSP430F2232 , MSP430F2234 , MSP430F2252 , MSP430F2252-Q1 , MSP430F2254 , MSP430F2272 , MSP430F2272-Q1 , MSP430F2274 , MSP430F2274-EP , MSP430F233 , MSP430F2330 , MSP430F235 , MSP430F2350 , MSP430F2370 , MSP430F2410 , MSP430F2416 , MSP430F2417 , MSP430F2418 , MSP430F2419 , MSP430F247 , MSP430F2471 , MSP430F248 , MSP430F2481 , MSP430F249 , MSP430F2491 , MSP430F2616 , MSP430F2617 , MSP430F2618 , MSP430F2619 , MSP430G2001 , MSP430G2101 , MSP430G2102 , MSP430G2111 , MSP430G2112 , MSP430G2121 , MSP430G2131 , MSP430G2132 , MSP430G2152 , MSP430G2153 , MSP430G2201 , MSP430G2201-Q1 , MSP430G2202 , MSP430G2203 , MSP430G2210 , MSP430G2211 , MSP430G2212 , MSP430G2213 , MSP430G2221 , MSP430G2230 , MSP430G2231 , MSP430G2231-Q1 , MSP430G2232 , MSP430G2233 , MSP430G2252 , MSP430G2253 , MSP430G2302 , MSP430G2303 , MSP430G2312 , MSP430G2313 , MSP430G2332 , MSP430G2333 , MSP430G2352 , MSP430G2353 , MSP430G2402 , MSP430G2403 , MSP430G2412 , MSP430G2413 , MSP430G2432 , MSP430G2433 , MSP430G2444 , MSP430G2452 , MSP430G2453 , MSP430G2513 , MSP430G2533 , MSP430G2544 , MSP430G2553 , MSP430G2744 , MSP430G2755 , MSP430G2855 , MSP430G2955 , MSP430TCH5E
启用(通用)中断
EINT
1→GIE
或
(0008h.OR.SR → SR/.src .OR. dst → dst)
BIS #8,SR
所有中断被启用。
常量 #08h 与状态寄存器 SR 逻辑与。结果被放置在 SR 内。
状态位不受影响。
GIE 被置位。OSCOFF 和 CPUOFF 不受影响。
状态寄存器中的通用中断使能 (GIE) 位被置位。
; Interrupt routine of ports P1.2 to P1.7
; P1IN is the address of the register where all port bits are read.P1IFG is
; the address of the register where all interrupt events are latched.
PUSH.B &P1IN
BIC.B @SP,&P1IFG ; Reset only accepted flags
EINT ; Preset port 1 interrupt flags stored on stack
; other interrupts are allowed
BIT #Mask,@SP
JEQ MaskOK ; Flags are present identically to mask: jump
......
MaskOK BIC #Mask,@SP
......
INCD SP ; Housekeeping: inverse to PUSH instruction
; at the start of interrupt subroutine.Corrects
; the stack pointer.
RETI
启用中断
当中断被启用时,启用中断指令 (EINT) 后的指令一直被执行,即使一个中断处理请求在等待中也是如此。