Correctly infer train orientation when stopping inside reversing loop

[eyip002]

The Kehrschleifenmodul actively reverses the block's orientation, but the reversal is dependent on whether train exits the block from where it entered. There is no reliable method to correctly infer the train's orientation when it stops in the reversing loop.

[eyip002]

The state of the Kehrschleifenmodul can be read from CV number 51 of the GBM16T it is attached to. Flips between 0 and 1.

[eyip002]

Kehrschleifenmodul can be controlled as a DCC accessory via BiDiB Wizard:

• GBM16T
  • Reverser
    • Reverser Mode: Track & DCC
    • Decoder Address
      • Enter a decoder address that does not conflict with existing DCC addresses, e.g., already assigned to locomotives
      • Select "Decoder enabled"
      • The "First turnout address (RCN)" and "First turnout address (DCC packet)" are automatically populated

If a decoder address of 12 is used, then the RCN is 45 and DCC packet is 48. Open the DCC Accessory Controller under the menu item "Node". Enter the DCC address of 48 and select "direct". Click the "red" or "green" aspect to send a DCC accessory request.

[eyip002]

1. Determine if train has stopped inside the reversing loop
2. Determine state of the reversing loop
3. Compute the required driving orientation

See issue in libbidib: https://github.com/uniba-swt/libbidib/issues/8