參數(shù)資料
型號(hào): HIF_SPEC
英文描述: EZ-030 Demonstration Board Theory of Operation Host Interface (HIF) Specification
中文描述: 易- 030演示板的經(jīng)營(yíng)理論主機(jī)接口(誘導(dǎo)因子)規(guī)格
文件頁數(shù): 84/118頁
文件大小: 356K
代理商: HIF_SPEC
3–60
Host Interface (HIF) Specification
84
Example Call
oldmask: .word
0
;placeholder for old
;mask field value
const
lr2,0x10
;mask = 10 (*INTR(2:0)
;enable)
const
lr3,0x0
;enable interrupts
;(di = 0)
const
gr121,291
;service = 291
asneq
69,gr1,gr1
;call the OS
jmpf
gr121,mask_err
;jump if error
const
gr120,oldmask
;set address for saving
consth
gr120,oldmask
;the old IM field value
store
0,0,gr96,gr120
;save the oldIM field
;value
In the example call, the IM field of the current processor status register is to be
set to 10, enabling external interrupt pins INTR0, INTR1, and INTR2. If this
service is not available, or if the value in
lr2
is illegal, the service will return
an error code, in which case the program jumps to the
mask_err
label. If the
service execution is successful, the previous contents of the IM field are stored
in the
oldmask
variable.
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