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Added power saving support #36

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Added power saving support #36

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6786457
Added power saving support
RaNo99 Jun 11, 2025
f0a5b44
Address ruff complaints
RaNo99 Jun 11, 2025
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29 changes: 29 additions & 0 deletions adafruit_veml7700.py
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Original file line number Diff line number Diff line change
Expand Up @@ -104,6 +104,23 @@ class VEML7700:
ALS_800MS,
]

# Power saving mode settings
PSM_500 = const(0x0)
PSM_1000 = const(0x1)
PSM_2000 = const(0x2)
PSM_4000 = const(0x3)

# Power saving mode value integers
psm_values = {
PSM_500: 500,
PSM_1000: 1000,
PSM_2000: 2000,
PSM_4000: 4000,
}

# Convenience list of power saving mode settings
psm_settings = [PSM_500, PSM_1000, PSM_2000, PSM_4000]

# ALS - Ambient light sensor high resolution output data
light = ROUnaryStruct(0x04, "<H")
"""Ambient light data.
Expand Down Expand Up @@ -193,6 +210,13 @@ class VEML7700:

"""

# Power saving register
light_psm = RWBits(2, 0x03, 1, register_width=2)
"""Power saving mode setting. Power saving settings are 500, 1000, 2000, 4000 ms.
Settings options are: PSM_500, PSM_1000, PSM_2000, PSM_4000"""
light_psm_en = RWBit(0x03, 0, register_width=2)
"""Power saving mode enable setting. When ``True``, power saving mode is enabled."""

def __init__(self, i2c_bus: I2C, address: int = 0x10) -> None:
self.i2c_device = i2cdevice.I2CDevice(i2c_bus, address)
for _ in range(3):
Expand Down Expand Up @@ -348,3 +372,8 @@ def wait_autolux(self, wait_time: float) -> None:
minimum_wait_time = self.integration_time_value() / 1000
actual_wait_time = max(minimum_wait_time, wait_time)
time.sleep(actual_wait_time)

def psm_value(self) -> float:
"""Power saving mode value in integer form. Used for calculating refresh time."""
psm = self.light_psm
return self.psm_values[psm]