CleverHand-hardware/docs/initialisation

Initialisation Protocol (V2)

Main Changes

Changes from V1

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:

• Blue: running the main loop.
• Blinks red: adds 1 count/ received a rising edge

The colour of the LED indicates the internal address:

• Red: internal address is 1
• Orange: internal address is 2
• Yellow: internal address is 3
• Green: internal address is 4

In terms of wiring and pin selection, only the FPC cable (communication bus) was used. No extra wires are added to the PCBs.

Pin Selection

IO1_out (15):

• Read StopState from the previous module
• Allows StopState to be propagated along the chain of modules

IO1_in (3):

• Pulled LOW to stop the next module counting (i.e. send StopState to the next module)
• Allows StopState to be propagated along the chain of modules

I2C_SCL (20):

• Read CLK signal from the Teensy 4.0 controller
• Shared between all modules
• 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

Fig.1 Pinout

Method

More information can be found on hc32l110_clvhd.