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module: calculate refresh time from any RSET without lookup table

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cn 2019-09-18 22:52:29 +02:00
parent 6b2bde2dce
commit df23b9905b
2 changed files with 7 additions and 7 deletions
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2
tests/veml6070_test.py
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@ -101,4 +101,6 @@ class TestVeml6070(snapshottest.TestCase):
veml3 = veml6070.Veml6070(rset=veml6070.RSET_600K) veml3 = veml6070.Veml6070(rset=veml6070.RSET_600K)
veml3.set_integration_time(veml6070.INTEGRATIONTIME_2T) veml3.set_integration_time(veml6070.INTEGRATIONTIME_2T)
self.assertEqual(veml3.get_refresh_time(), 0.5) self.assertEqual(veml3.get_refresh_time(), 0.5)
veml4 = veml6070.Veml6070(rset=480000)
self.assertEqual(veml4.get_refresh_time(), 0.2)
# don't assert mockbus._log as we do not care # don't assert mockbus._log as we do not care

12
veml6070/veml6070.py
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@ -19,6 +19,10 @@ INTEGRATIONTIME_1T = 0x01
INTEGRATIONTIME_2T = 0x02 INTEGRATIONTIME_2T = 0x02
INTEGRATIONTIME_4T = 0x03 INTEGRATIONTIME_4T = 0x03
# Scale factor in seconds / Ohm to determine refresh time for any RSET
# Note: 0.1 seconds (100 ms) are applicable for RSET_240K and INTEGRATIONTIME_1T
RSET_TO_REFRESHTIME_SCALE = 0.1 / RSET_240K
class Veml6070(object): class Veml6070(object):
def __init__(self, i2c_bus=1, sensor_address=ADDR_L, rset=RSET_270K, integration_time=INTEGRATIONTIME_1T): def __init__(self, i2c_bus=1, sensor_address=ADDR_L, rset=RSET_270K, integration_time=INTEGRATIONTIME_1T):
@ -72,19 +76,13 @@ class Veml6070(object):
""" """
returns time needed to perform a complete measurement using current settings (in s) returns time needed to perform a complete measurement using current settings (in s)
""" """
case_refresh_rset = {
RSET_240K: 0.1,
RSET_270K: 0.1125,
RSET_300K: 0.125,
RSET_600K: 0.25
}
case_refresh_it = { case_refresh_it = {
INTEGRATIONTIME_1_2T: 0.5, INTEGRATIONTIME_1_2T: 0.5,
INTEGRATIONTIME_1T: 1, INTEGRATIONTIME_1T: 1,
INTEGRATIONTIME_2T: 2, INTEGRATIONTIME_2T: 2,
INTEGRATIONTIME_4T: 4 INTEGRATIONTIME_4T: 4
} }
return case_refresh_rset[self.rset] * case_refresh_it[self.integration_time] return self.rset * RSET_TO_REFRESHTIME_SCALE * case_refresh_it[self.integration_time]
def get_uva_light_sensitivity(self): def get_uva_light_sensitivity(self):
""" """