DTS2
A DIN-rail mounted device that can read either two thermocouples or two RTDs.

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== Version 4.11 ==
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24 February 2022
***Production Version Re-Built Only***
- fixed HMI inputs and outputs numbering to be contiguous with the DTS2 IO map; production test is running Ok after these mods (was crashing before).

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== Version 4.10 ==
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29 April 2021
- Normal version without the Frank Cerberos specialisation.

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== Version 4.9 ==
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29 April 2021
- Special version for Frank Cerberos
- Added new flag to ensure reading thread does not start until initialisation is complete.
- Added delays before starting conversion.
- Changed thread structure to provide separate threads for thermocouples or RTDs, rather than dynamically switching between them.
- Changed RTD code from Automatic (continuous) conversion to repeated One-Shot mode.

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== Version 4.8 ==
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26 March 2021
- Special version for Frank Cerberos
- Reverted reference resistor to 422.0 ohms because that's what his version of the code has.
- Re-built to include Modbus code (with modifications to Keith's original for the updated I/O map)

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== Version 4.7 ==
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25 March 2021
- Reverted reference resistor to 402.0 ohms because that's what the design is intended for.
- Removed 1K dummy output as that's all done with hardware now and is transparent to software.
- Modified SEXI code to not try to output to the now-gone 1K dummy output.
- Fixed temperature randomness by adding post-SPI packet delay.

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== Version 4.6 ==
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18 March 2021
- Changed reference resistor (temporarily) to 422.0 ohms because that's what we have that's close to the recommended value.
- Will change back to 402 ohms when they become available.
- Modified short-circuit and open-circuit thresholds to suit the real measurements.
- Changed DAC Output to disable the buffer

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== Version 4.5 ==
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11 February 2021
- Removed the Chip Select outputs from SPLat visibility.
- Removed red and green LEDs from SEXI access.
- Improved fault detection, spefically changing it for PT100/PT1000
- Improved the calculations for PT1000

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== Version 4.4 ==
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25 January 2021
- Implemented Thermocouple reading code
- Added Dummy Analogue inputs for measured and internal temperatures
- Added Dummy Digital inputs for errors.
- Implemented HMI430 test code.
- Implemented RTD reading code
- Added Dummy Digital Outputs for RTD control (50/60Hz filter selection and PT100/PT1000 selection)
- Updated Production Test to actually test the temperature inputs.

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== Version 4.3 ==
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23 September 2020
- Added pull-ups to iTS1Ready and iTS2Ready so they will work correctly.
- Separated LED operation because it's not bi-colour.
- Modified SPxMode operation so it overrides the automatic rising/falling edge selection.

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== Version 4.2 ==
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23 September 2020
- Corrected semaphore access during the start-up procedure, which was stopping other functions from starting.
- Updated production test to correct number of BIO pins.
- Added automatic 3V3 trimming in production test.

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== Version 4.1 ==
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22 September 2020
- Took Pin A10 out of the Unused I/O listing because that breaks the USB.
- Updated Production Test and SEXI splat code to correlate with the actual I/O map.

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== Version 4.0 ==
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21 September 2020
- First cut.