// Called by Sensor CLX to begin continously sampling the sensor.
NTSTATUS
CustomSensorDevice::OnStart(
_In_ SENSOROBJECT SensorInstance // sensor device object
)
{
PHardwareSimulator pSimulator = nullptr;
PCustomSensorDevice pDevice = GetCustomSensorContextFromSensorInstance(SensorInstance);
NTSTATUS Status = STATUS_SUCCESS;
SENSOR_FunctionEnter();
if (nullptr == pDevice)
{
Status = STATUS_INVALID_PARAMETER;
TraceError("PED %!FUNC! Sensor(%08X) parameter is invalid. Failed %!STATUS!", (INT)SensorInstance, Status);
}
if (NT_SUCCESS(Status))
{
// Get the simulator context
pSimulator = GetHardwareSimulatorContextFromInstance(pDevice->m_SimulatorInstance);
if (nullptr == pSimulator)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
TraceError("PED %!FUNC! GetHardwareSimulatorContextFromInstance failed %!STATUS!", Status);
}
}
if (NT_SUCCESS(Status))
{
// Start the simulator
pSimulator->Start();
pDevice->m_FirstSample = TRUE;
// Start polling
pDevice->m_Started = TRUE;
InitPropVariantFromUInt32(SensorState_Active,
&(pDevice->m_pProperties->List[SENSOR_PROPERTY_STATE].Value));
// Start the sample polling timer.
// Note1: the WDF timer is only as precise as the system resolution allows it to be.
// In the case of the CO2 sensor, the reporting interval is 200 milliseconds. The default
// system resolution (15.6 milliseconds) is therefore fine enough to guarantee an accurate sample
// reporting interval. Some sensors using a lower reporting interval may want to reduce the system
// time resolution by calling into timeBeginPeriod() before starting the polling timer.
//
// Important consideration: calling into timeBeginPeriod() should be used with care as it has
// an adverse on the system performance and power consumption.
//
// Note2: The polling timer is configured to allow for the first sample to be reported immediately.
// Some hardware may want to delay the first sample report a little to account for hardware start time.
WdfTimerStart(pDevice->m_Timer, 0);
}
SENSOR_FunctionExit(Status);
return Status;
}
// Called by Sensor CLX to begin continuously sampling the sensor.
NTSTATUS
PedometerDevice::OnStart(
_In_ SENSOROBJECT SensorInstance // Sensor device object
)
{
PHardwareSimulator pSimulator = nullptr;
PPedometerDevice pDevice = GetPedometerContextFromSensorInstance(SensorInstance);
NTSTATUS Status = STATUS_SUCCESS;
SENSOR_FunctionEnter();
if (nullptr == pDevice)
{
Status = STATUS_INVALID_PARAMETER;
TraceError("PED %!FUNC! Sensor(0x%p) parameter is invalid. Failed %!STATUS!", SensorInstance, Status);
goto Exit;
}
// Get the simulator context
pSimulator = GetHardwareSimulatorContextFromInstance(pDevice->m_SimulatorInstance);
if (nullptr == pSimulator)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
TraceError("PED %!FUNC! GetHardwareSimulatorContextFromInstance failed %!STATUS!", Status);
}
if (NT_SUCCESS(Status))
{
// Start the simulator
pSimulator->Start();
pDevice->m_FirstSample = TRUE;
// Start polling
pDevice->m_Started = TRUE;
InitPropVariantFromUInt32(SensorState_Active,
&(pDevice->m_pProperties->List[SENSOR_PROPERTY_STATE].Value));
// Start the sample polling timer.
//
// Note: The polling timer is configured to allow for the first sample to be reported immediately.
// Some hardware may want to delay the first sample report a little to account for hardware start time.
WdfTimerStart(pDevice->m_Timer, WDF_REL_TIMEOUT_IN_MS(Pedometer_Default_MinDataInterval_Ms));
}
Exit:
SENSOR_FunctionExit(Status);
return Status;
}
// Called by Sensor CLX to begin continously sampling the sensor.
NTSTATUS ActivityDevice::OnStart(_In_ SENSOROBJECT sensorInstance)
{
NTSTATUS status = STATUS_SUCCESS;
SENSOR_FunctionEnter();
PActivityDevice pDevice = GetActivityContextFromSensorInstance(sensorInstance);
if (nullptr == pDevice)
{
status = STATUS_INVALID_PARAMETER;
TraceError("ACT %!FUNC! Sensor parameter is invalid. Failed %!STATUS!", status);
}
else
{
if (FALSE == pDevice->m_PoweredOn)
{
status = STATUS_DEVICE_NOT_READY;
TraceError("ACT %!FUNC! Sensor is not powered on! %!STATUS!", status);
}
else
{
// Start simulation
if (NULL != pDevice->m_SimulatorInstance)
{
PHardwareSimulator pSimulator = GetHardwareSimulatorContextFromInstance(pDevice->m_SimulatorInstance);
if (nullptr != pSimulator)
{
pSimulator->Start();
}
}
// Start sensing
pDevice->m_FirstSample = TRUE;
pDevice->m_Started = TRUE;
InitPropVariantFromUInt32(SensorState_Active, &(pDevice->m_pProperties->List[SENSOR_PROPERTY_STATE].Value));
WdfTimerStart(pDevice->m_Timer, WDF_REL_TIMEOUT_IN_MS(Act_Default_MinDataInterval_Ms));
}
}
SENSOR_FunctionExit(status);
return status;
}