Caen RFID Easy2log RT0005, Техническое руководство

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easy2log© RT0005 Technical Information Manual 28
SAMPLES_NUM register (RO)
Register Address Op. Default
SAMPLES_NUM 0x67 RO 0x0000
It represents the number of samples present inside the log memory. SAMPLES_NUM register is set to 0 after a reset
operation.
SHIPPING_DATE register (RO- 2 words)
Register Address Op. Default
SHIPPING_DATE_L 0x6A RO 0x0000
SHIPPING_DATE_H 0x6B RO 0x0000
The Shipping Date register (expressed in the Unix time format) is used to store the time when logging was enabled (by
RF or, if enabled, by the button). Default value of SHIPPING_DATE register is 0. SHIPPING_DATE register is set to 0 after
a reset operation.
STOP_DATE register (RO- 2 words)
Register Address Op. Default
STOP_DATE _L 0x6C RO 0x0000
STOP_DATE _H 0x6D RO 0x0000
The STOP_DATE register (expressed in the Unix time format) is used to store the time when logging was stopped (by RF
or, if enabled, by the button). Default value of STOP_DATE register is 0. STOP_DATE register is set to 0 after a reset
operation.
USER_AREA registers (RW - 28 words)
Register Address Op. Default
USER_AREA_0 0x6E RW --
USER_AREA_1 0x6F RW --
... .. .. --
USER_AREA_27 0x89 RW --
User area is a set of 28 words registers for user defined data storage.
Registers use example
Let suppose that the user wants to configure the tag as described in the first example of the paragraph, in the table
below is presented again the scenario that shall be realized:
Bin Low Limit
(°C)
High Limit
(°C)
Enabled Threshold Store
Samples
Sampling Interval (min.)
0 -20 -15 Yes 0 Yes 15
1 -15 -10 Yes 3 Yes 10
2 -10 0 Yes 2 Yes 5
3 0 70 Yes 1 Yes 1
First of all let’s set the upper limit of each histogram bin. The upper limits in the example are -15, -10, 0 and 70 °C. The
data need to be converted in fixed point 8.5 notation format using the formula (3):
T(°C) T
fixed
Register
hex
-15 7712 HLIMIT[0] = 0x1E20
-10 7872 HLIMIT[1] = 0x1EC0
0 0 HLIMIT[2] = 0x0000
70 2240 HLIMIT[3] = 0x08C0
All the 4 Bins used in the example need to be enabled in the BIN_ENABLE register, the bits corresponding shall be set to
1: