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8d79f27d51
Documentation describing the Low Power control algorithm and synchronization with the system using dedicated sentinels and drivers.
71 lines
1.5 KiB
Plaintext
71 lines
1.5 KiB
Plaintext
@startuml
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service_eInk -> eInkSentinel : SetFrequencyValueRequest
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eInkSentinel -> PowerManager : RequestCpuFrequencyMessage
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PowerManager -> CpuGovernor : SetCpuFrequencyRequest
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service_eInk -> EinkDisplay : powerOn
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EinkDisplay -> driverLPSPI : Enable
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driverLPSPI -> driverPLL2 : Pll2ClockEnable
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note right
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Critical section!
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mutex necessary
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end note
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driverLPSPI -> clock_config : LPSPIClockEnable
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...screen redraw...
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EinkDisplay -> driverLPSPI : Disable
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driverLPSPI -> clock_config : LPSPIClockDisable
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driverLPSPI -> driverPLL2 : Pll2ClockDisable
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note right
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Critical section!
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mutex necessary
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end note
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service_eInk -> eInkSentinel : ResetCpuFrequencyRequest
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eInkSentinel -> PowerManager : RequestCpuFrequencyMessage
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PowerManager -> CpuGovernor : ResetCpuFrequencyRequest
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@enduml
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@startuml
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service_cellular -> cellularSentinel : SetFrequencyValueRequest
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cellularSentinel -> PowerManager : RequestCpuFrequencyMessage
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PowerManager -> CpuGovernor : SetCpuFrequencyRequest
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service_cellular -> bsp_cellular : wakeUp
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bsp_cellular -> driverUART : Enable
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driverUART -> clock_config : ExternalOscillatorEnable
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note right
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Critical section!
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mutex necessary
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end note
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driverUART -> clock_config : UARTClockEnable
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...call ended...
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bsp_cellular -> driverUART : Disable
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driverUART -> clock_config : UARTClockDisable
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service_cellular -> cellularSentinel : ResetCpuFrequencyRequest
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cellularSentinel -> PowerManager : RequestCpuFrequencyMessage
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PowerManager -> CpuGovernor : ResetCpuFrequencyRequest
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@enduml
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