Example 3) When reading data from a file "\abc\data1.txt" specifying the 10th byte
from the head of the file for the reading position
","
"a"
"b"
"c"
","
"a"
"x"
"t"
"."
"t"
"a"
"1"
High
DT0
DT1
DT2
DT3
DT4
DT5
[S1] …DT0
Byte address
Low
"¥"
"a"
"d"
"t"
"¥"
"b"
U14
"a"
"c"
DT6
[D1] …DT100
[D2] …DT50
DT7
Contents of file "data1.txt"
12 CRLF
a,ab,abc,abcd,abcde + CRLF
:
Position of file pointer
DT100
DT101
DT102
DT103
DT104
DT105
DT106
DT107
DT108
DT109
H 0000
H 0000
H 0000
H 0000
H 0000
H 0000
H 0000
H 0000
H 0000
H 0000
DT50
DT51
DT52
DT53
DT54
H 0000000A
U10
H 0000
H 0000
・・・
Position of 9th byte
from the head of file
・・・
Max. size: 10 bytes
・・・
Reserved for system
DT50
DT51
DT52
DT53
DT54
H 00000014
U10
H 0000
H 0000
・・・
Read data
Reading position at the end
High
DT100
DT101
DT102
DT103
DT104
DT105
Low
"a"
"a"
","
"b"
U10
DT106
DT107
H 0000
12 CRLF
a,ab,abc,abcd,abcde + CRLF
Contents of file "data1.txt"
Byte address
H 0000
H 0000
DT108
DT109
H 0000
[i] …STR
DT8
H 0000
■
Precautions for programming
● Also refer to section
"19.9 Common Precautions for SD Memory Card Access Instructions"
.
● The SD memory card access instruction active flag (SR3A) turns ON after the execution
condition has turned ON until the completion of the execution of the instruction. During this
time other SD memory card access instructions cannot be executed.
● During the execution of the CRD1 instruction, data read from the SD memory card is written
from the beginning of the specified data device area in order. Therefore, until this instruction
is complete, do not read data within the range of the data device specified to store the data.
18.9 CRD1 (One Line Read from File)
18-46
WUME-FP7CPUPGR-12
Summary of Contents for FP7 Series
Page 2: ... MEMO 2 WUME FP7CPUPGR 12 ...
Page 18: ... MEMO xviii WUME FP7CPUPGR 12 ...
Page 52: ... MEMO 1 34 WUME FP7CPUPGR 12 ...
Page 104: ... MEMO 2 52 WUME FP7CPUPGR 12 ...
Page 123: ...3 9 ANS AND stack WUME FP7CPUPGR 12 3 19 ...
Page 125: ...3 10 ORS OR Stack WUME FP7CPUPGR 12 3 21 ...
Page 129: ...3 11 PSHS Push stack RDS Read stack POPS Pop stack WUME FP7CPUPGR 12 3 25 ...
Page 190: ...3 26 JP LBL Jump Label 3 86 WUME FP7CPUPGR 12 ...
Page 239: ...Name Description SR8 ER 3 46 ST ST ST ST ST ST Data Comparison Start WUME FP7CPUPGR 12 3 135 ...
Page 246: ... MEMO 3 142 WUME FP7CPUPGR 12 ...
Page 258: ... MEMO 4 12 WUME FP7CPUPGR 12 ...
Page 304: ... MEMO 5 46 WUME FP7CPUPGR 12 ...
Page 321: ...Name Description ER 6 7 DIVFP2 Division FP2 Compatible WUME FP7CPUPGR 12 6 17 ...
Page 348: ... MEMO 6 44 WUME FP7CPUPGR 12 ...
Page 388: ... MEMO 7 40 WUME FP7CPUPGR 12 ...
Page 438: ... MEMO 8 50 WUME FP7CPUPGR 12 ...
Page 450: ... MEMO 9 12 WUME FP7CPUPGR 12 ...
Page 520: ... MEMO 10 70 WUME FP7CPUPGR 12 ...
Page 602: ... MEMO 11 82 WUME FP7CPUPGR 12 ...
Page 622: ... MEMO 12 20 WUME FP7CPUPGR 12 ...
Page 650: ... MEMO 13 28 WUME FP7CPUPGR 12 ...
Page 1160: ... MEMO 18 66 WUME FP7CPUPGR 12 ...
Page 1188: ... MEMO 19 28 WUME FP7CPUPGR 12 ...
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