Aim AMC429, Справочное руководство

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72 Software Library Reference Manual for VME 429
Section 4 – Memory Functions
4.4 Api429ReadMemData
P P r r o o t t o o t t y y p p e e : :
AiUInt8 Api429ReadMemData( AiUInt8 b_Module, AiUInt8 memtype, AiUInt32 offset,
AiUInt8 width, void *data_p );
D D r r i i v v e e r r C C o o m m m m a a n n d d : :
None
P P u u r r p p o o s s e e : :
This function is used to read a byte/word/longword from the AIM board memory in
avoidance of AIM board command and acknowledge interface access. This is
necessary to access the AIM board memory in case of interrupt. The function does
a direct access to the AIM board memory with the specified offset address.
I
I
n
n
p
p
u
u
t
t
A
A
i
i
U
U
I
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n
n
t
t
8
8
m
m
e
e
m
m
t
t
y
y
p
p
e
e
Memory Type to be accessed
Value Constant Description
0 API_MEMTYPE_GLOBAL Global Memory access
1 API_MEMTYPE_SHARED Shared Memory access
2 API_MEMTYPE_LOCAL Local Memory access
3 API_MEMTYPE_IO IO/Galileo Memory access
A
A
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U
U
I
I
n
n
t
t
3
3
2
2
o
o
f
f
f
f
s
s
e
e
t
t
Byte offset address relative to the start of a specific onboard memory described
in parameter ‘memtype’.
A
A
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i
U
U
I
I
n
n
t
t
8
8
w
w
i
i
d
d
t
t
h
h
Data width of access
Value Synonym Description
1 sizeof(AiUInt8) Byte data access
2 sizeof(AiUInt16) Word data access
4 sizeof(AiUInt32) Longword data access
O
O
u
u
t
t
p
p
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u
t
t
v v o o i i d d * * d d a a t t a a _ _ p p
Data to read to. This pointer should match to the data size given in the parameter
‘width’.
R R e e t t u u r r n n V V a a l l u u e e
Value Constant Description
0 API429_CMD_OK
Execution success
1 API429_CMD_ERR Execution error