TEI0016 - Jupyter Demo
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5.2 Communicating with module:
To communicate with the module, a serial comport port with a speed set to
115200
bits needs to be opened.
Commands consists of a single
character
in
UTF-8
encoding.
It is good practice to communication with the module following these steps:
Open a serial comport
Clear the PCs serial comport input buffer of the opened comport
Send the desired commands, each one in a single write operation to the comport
Close the serial comport as soon as possible
These steps apply also for read operations.
5.3 Using the ADC for high speed consecutive measurements
The module provides a method to gather highly accurate consecutive ADC measurements in a single event.
In this mode of operation, one mega sample of ADC values are performed and stored inside the modules
SD-RAM.
The following step should be taken in this mode:
Open a serial comport
For TEI0015 and TEI0016: Send the command "1", "2", "4" or "8" for the ADC pre-amplification of 1, 2, 4, 8
For TEI0023: Send the command "1", "2", "3", "4", "5", "6" or "7" for the ADC pre-amplification of
0.25, 0.5, 1, 2, 4, 8 and 16
Send the command "t" to trigger the consecutive measurement.
(The module always measures 1 MSample of data into its SD-RAM)
Clear the PCs serial comport input buffer of the opened comport
Send the command "+" or "*"to the module, it then transmits 128 or 16384 Samples of ADC values
Read the amount of ADC values in one chunk of 128 or 16384 samples from the PCs serial input buffer
(Otherwise there is a high possibility of a misalignment of nibbles)
Repeat the reading of chunks to a maximum of 1 mega sample
Close the comport
After a trigger event, the one mega sample of data is stored until your retrigger. So processing the data can
be done for each chunk individually or the whole one mega sample.
Information to convert the RAW ADC data into standard integer values.
5.3.1 Module TEI0015 - AD4003BCPZ-RL7
Resolution: 18-bit in 5 nibbles
Maximum sampling rate: 2 MSPS
Order of Values:
Hex
Dec
Hex
Dec
Mid scale
0x00000
0
Positive 1 LSB
0x00001
1
to full scale -1 LSB
0x1ffff
131071
Negative full scale
0x20000
131072
to -1 LSB
0x3FFFF
262143
The layout of the ADC circuit is further described in the Analog Devices circuit note
