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36 lines
1.3 KiB
Markdown
36 lines
1.3 KiB
Markdown
# Initialisation Protocol (V2)
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## Main Changes
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## Changes from V1
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The LEDs are used to indicate the internal address of the module. Here are what the LED colours indicate before settling for the final colour:
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* Blue: running the main loop.
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* Blinks red: adds 1 count/ received a rising edge
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The colour of the LED indicates the internal address:
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* Red: internal address is 1
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* Orange: internal address is 2
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* Yellow: internal address is 3
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* Green: internal address is 4
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In terms of wiring and pin selection, only the FPC cable (communication bus) was used. No extra wires are added to the PCBs.
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## Pin Selection
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**IO1_out (15)**:
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* Read StopState from the previous module
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* Allows StopState to be propagated along the chain of modules
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**IO1_in (3)**:
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* Pulled LOW to stop the next module counting (i.e. send StopState to the next module)
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* Allows StopState to be propagated along the chain of modules
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**I2C_SCL (20)**:
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* Read CLK signal from the Teensy 4.0 controller
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* Shared between all modules
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* Interrupt request (IRQ) is enabled. Each rising edge read by the pin sends a signal to the controller and the interrupt routine is carried out
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Fig.1 Pinout
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## Method
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More information can be found on [hc32l110_clvhd](https://github.com/Aightech/hc32l110_clvhd.git).
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