• use STALS_GetControl() to get wa status. pControlValue is then an in/out parameter. You call it with the wa
for which you want to know state. On exit you read msb bit to know wa status.
3.5.6 enum STALS_Mode_t
This enumeration is aimed at defining the different behavior modes of the STALS device.
Enumerator
STALS_MODE_ALS_SINGLE_SHOT Single shot mode. In this mode, the STALS records and accumulates the
light for 1 single period.
The STALS driver client is responsible for starting the next integration period, by calling the STALS_Start function
again
STALS_MODE_ALS_SYNCHRONOUS Synchronous mode. This mode, is a continuous measurement mode
meaning that this needs to be stopped by calling STALS_Stop. But a handshake is necessary to have
the registers updated with the values of the on going measurement. This handshake is performed by the
STALS_GetAlsValues function.
Two options are available for the handshake
• by I2C reading. In this case the AC data is available on the GPIO1 pin
• by interrupt acknowledgment. In this case the AC data is NOT available
STALS_MODE_FLICKER Flicker mode. This mode outputs PDM on the GPIO1 or GPIO2 pin.
3.5.7 enum STALS_FlickerOutputType_t
Enumerator
STALS_FLICKER_OUTPUT_ANALOG Analog. DEPRECATED, use
STALS_FLICKER_OUTPUT_ANALOG_CFG_1 instead.
STALS_FLICKER_OUTPUT_ANALOG_CFG_1 Analog. PDM is output to GPIO1 through pad internal resistance.
STALS_FLICKER_OUTPUT_DIGITAL_PDM PDM Digital. This modes needs an external clock to feed the
device through the corresponding pin.
STALS_FLICKER_OUTPUT_ANALOG_CFG_2 Analog. PDM is output to GPIO2.
STALS_FLICKER_OUTPUT_ZC_CFG_1 Zero crossing. Zero crossing is output to GPIO1.
UM2878
Enumeration type documentation
UM2878 - Rev 1
page 20/27
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