• The session starts at point A (100th block), and ends at point B (141st block).
• While downloading, the smart phone receives, 142nd Block (oldest data) first
and 141st Block (newest data) at the end. The receiving block order should be
(142 to 500 and 1 to 141).
• Since circular buffer is on, the log will not end at 500th block.
• The Blocks 100 to 140 will be over written by new data.
11.1.6.5 Circular Buffer ON – Multi Session – Memory Not Overlapped
• The session starts at point A, C and ends at point B,D.
• While downloading, the smart phone receives, 51st Block (oldest data) first
and 50th Block (newest data) at the end. The receiving block order should be
(51 to 500 and 1 to 50).
• Since circular buffer is on, the log will not end at 500th block.
• The first session will be placed at blocks 101 to 340.
• The Second session will be placed at blocks 341 to 500 and 1 to 50.
• The blocks 51 to 100 contain old data.
11.1.6.6. Circular Buffer ON – Multi Session – Memory Overlapped
• The session starts at point A, C and ends at point B, D.
• While downloading, the smart phone receives, 201st Block (oldest data) first
and 200th Block (newest data) at the end. The receiving block order should be
(201 to 500 and 1 to 200).
• Since circular buffer is on, the log will not end at 500th block.
• The first session will be placed at blocks 101 to 340.
• The first session blocks 101 to 200 are over written by second session.
• The Second session will be placed at blocks 341 to 500 and 1 to 200.
100 101 ….
1
….
….
….
2
499 500
START
A
END
B
100 101
….
1
….
….
….
2
499 500
START
1
A
END
1
B
…. …. 340 341
START
2
C
END
2
D
100 101
….
1
….
….
….
2
499 500
…. …. 340 341
START
A
END
B
100 101
….
1
….
….
….
2
499 500
…. …. 141 142
START
A
END
B
100 101
….
50
….
….
….
51
499 500
START
1
A
END
1
B
…. …. 340 341
START
2
C
END
2
D
1
….
….
2
100 101
….
1
….
….
….
2
340 341
…. …. 200 201
START
1
A
END
2
D
…. …. 499 500
END
1
B
START
2
C
Figure 11-6: Circular Buffer ON – Multi Session – Memory Not Overlapped
Figure 11-7: Circular Buffer ON – Multi Session – Memory Overlapped
100 101 ….
1
….
….
….
2
499 500
START
A
END
B
100 101
….
1
….
….
….
2
499 500
START
1
A
END
1
B
…. …. 340 341
START
2
C
END
2
D
100 101
….
1
….
….
….
2
499 500
…. …. 340 341
START
A
END
B
100 101
….
1
….
….
….
2
499 500
…. …. 141 142
START
A
END
B
100 101
….
50
….
….
….
51
499 500
START
1
A
END
1
B
…. …. 340 341
START
2
C
END
2
D
1
….
….
2
100 101
….
1
….
….
….
2
340 341
…. …. 200 201
START
1
A
END
2
D
…. …. 499 500
END
1
B
START
2
C
11-9
Data Logging
11
