Group 1

Phase 4
4.1 Sequence Diagram: Button Pressed
S1: if the button resume is pressed then acc control unit will send signal to acc to
activate acc.
S2: if the button off is pressed then acc control unit will send signal to acc to
deactivate acc.
S3: if the button set is pressed then acc control unit will send signal to acc to set
the current speed as the desired speed.
S4: if the button plus is pressed then acc control unit will send signal to acc to add
the desired speed by 10 km/hour.
S5: if the button minus is pressed then acc control unit will send signal to acc to
subtract the desired speed by 10 km/hour.
S6: If ACC detect button signal then there will be acoustic and optical warning from
multifunctional display.
S7: If ACC detect speed value then there will be display in Multifunctional display.
sd Distance Update
loop
ACC CAN Bus Controller
{currentDistance = -1}
alt
ACTIVE_ACC
sendSignal(820,distance)
sendSignal(820,distance)
__ t = t + 25
{currentDistance = currentDistance}
ACTIVE_ACC
sendSignal(820,65535)
__t = t + 101
sendSignal(601, "OFF",0)
DEACTIVE_AC
C
sendSignal(820,distance)
__ t = now
Sensor Multifunctional Display
__ t = now
sendSignal(601, "OFF",0)
Figure 4.1. Sequence Diagram Distance Update
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