Tour flows¶

As we have said, a flow is a magnitude (logical or physical) of interest in our system.

We can see a flow that is representing a digital input of the system: the ignition button of the car.

http://ucanca.gatatac.org/flows/34-in-but-ignition

In this web page we can see:

• Flow properties:
  • Type (in this case is a DIO - digital input output -).
• SubSystem flows: the subsystems that are using the flow. In this example we can read:
  • The CU subsystem (CU is the abbreviation of ControlUnit in this project) is using it as an input located the first pin of its J3 connector.
  • The CU_micro subsystem (it is actually the microcontroller inside the ControlUnit system) is using it as an input located in the pin 11 of its {{fn(PINOUT, microcontrollers do not have different connectors, we usually use a virtual PINOUT connector that groups all the inputs and outputs. Sometimes we make a partition of the real pinout, f.i. FUNCTIONAL pins and MCUSUPPORT pins for functonal I/O and support I/O like the oscillator, the power or the ADC reference of a microcontroller) connector.
  • The CU_micro_lights subsystem (actually a functional software module called LIGHTS inside the microcontroller software) is using it as pin 7*1 of its DRE*2 connector.