Maxim-integrated MAX31782 Manual do Utilizador descarregar pdf (Página 177)

Maxim Integrated 19-12

MAX31782 User’s Guide

Revision 0; 8/11

19.7.3 Conditional Jumps

Conditional jumps transfer program execution based on the value of one of the status flags (C, E, Z, S). Except where

noted for JUMP E and JUMP NE, the absolute and relative operands allowed are the same as for the unconditional

JUMP command.

jump c,Label1 ;jumptoLabel1ifCarryisset

jump nc,LongJump;jumptoLongJumpifCarryisnotset

jump z,LC[0] ;jumpto16-bitregisterdestinationif

    ; Zeroisset

jump nz,Label1 ;jumptoLabel1ifZeroisnotset(Acc<>0)

jump s,A[2] ;jumptoA[2]ifSignflagisset

jump e,Label1 ;jumptoLabel1ifEqualisset

jump ne, Label1 ; jump toLabel1ifEqualis cleared

JUMP E and JUMP NE may only use immediate destinations.

19.7.4 Calling Subroutines

The CALL instruction works the same as the unconditional JUMP, except that the next execution address is pushed

on the stack before transferring program execution to the branch address. The RET instruction is used to return from a

normal call, and RETI is used to return from an interrupt handler routine.

call Label1 ; ifLabel1isrelative,

    ;assemblesto: call#immediate

call LongCall ;assemblesto: movePFX[0],#high(LongCall)

    ;call#low(LongCall)

call LC[0]  ;calltoaddressinLC[0]

LongCall:

ret   ;returnfromsubroutine

1 2 ... 172 173 174 175 176 177 178 179 180 181 182 ... 222 223

Sem comentários

Maxim-integrated MAX31782 Manual do Utilizador Página 177