參數(shù)資料
型號: RX78K4
英文描述: 78K/IV Series Real-Time OS Fundamental | User's Manual[01/1997]
中文描述: 78K/IV系列實時操作系統(tǒng)的基本|用戶手冊[01/1997]
文件頁數(shù): 90/96頁
文件大小: 265K
代理商: RX78K4
81
APPENDIX 7 STANDBY FUNCTION
The RX78K/IV places the CPU in the HALT status as default assumption when there are no longer any selected
tasks. In some systems, however, the STOP mode or IDLE mode may be preferred to the HALT mode. With the
RX78K/IV, therefore, the standby processing is decided by the user. The supplied sample of the standby block,
“nuc_idle.asm”, is shown below.
Sample “nuc_idle.asm”
public
@nuc_idl
cseg
base
@nuc_idl:
mov
x, stbc
and
x, #0f0h
shr
x, 1
mov
a, #0
movw
bc, #hlt_tbl
addw
bc, ax
br
bc
;
hlt_tbl:
ei
mov
stbc, #00000001b
; set halt mode (fxx/2)
ret
;
nop
nop
;
ei
mov
stbc, #00010001b
; set halt mode (fxx/4)
ret
;
nop
nop
;
ei
mov
stbc, #00100001b
; set halt mode (fxx/8)
ret
;
nop
nop
;
ei
mov
stbc, #00110001b
; set halt mode (fxx/16)
ret
;
end
Remark
The above is the file supplied as a sample. This file is a routine that can be executed by the RX78K/IV
even if the internal system clock is changed in the user system.
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