1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
@startuml
skinparam BackgroundColor F0F0F0
service_eInk -> eInkSentinel : SetFrequencyValueRequest
eInkSentinel -> PowerManager : RequestCpuFrequencyMessage
PowerManager -> CpuGovernor : SetCpuFrequencyRequest
service_eInk -> EinkDisplay : powerOn
EinkDisplay -> driverLPSPI : Enable
driverLPSPI -> driverPLL2 : Pll2ClockEnable
note right
Critical section!
mutex necessary
end note
driverLPSPI -> clock_config : LPSPIClockEnable
...screen redraw...
EinkDisplay -> driverLPSPI : Disable
driverLPSPI -> clock_config : LPSPIClockDisable
driverLPSPI -> driverPLL2 : Pll2ClockDisable
note right
Critical section!
mutex necessary
end note
service_eInk -> eInkSentinel : ResetCpuFrequencyRequest
eInkSentinel -> PowerManager : RequestCpuFrequencyMessage
PowerManager -> CpuGovernor : ResetCpuFrequencyRequest
@enduml
@startuml
service_cellular -> cellularSentinel : SetFrequencyValueRequest
cellularSentinel -> PowerManager : RequestCpuFrequencyMessage
PowerManager -> CpuGovernor : SetCpuFrequencyRequest
service_cellular -> bsp_cellular : wakeUp
bsp_cellular -> driverUART : Enable
driverUART -> clock_config : ExternalOscillatorEnable
note right
Critical section!
mutex necessary
end note
driverUART -> clock_config : UARTClockEnable
...call ended...
bsp_cellular -> driverUART : Disable
driverUART -> clock_config : UARTClockDisable
service_cellular -> cellularSentinel : ResetCpuFrequencyRequest
cellularSentinel -> PowerManager : RequestCpuFrequencyMessage
PowerManager -> CpuGovernor : ResetCpuFrequencyRequest
@enduml