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spi_temperature: Fix incorrect max31856 spi initialization

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Writes to the max31856 chip use "burst mode", so only one address
during the initialization sequence can be sent.  This fixes erroneous
"Cold Junction Fault" errors.

Reported by @NBouquain.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2020-11-23 09:52:20 -05:00
parent c6f870a655
commit 665ec5e987
1 changed files with 0 additions and 2 deletions
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2
klippy/extras/spi_temperature.py
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@@ -174,12 +174,10 @@ class MAX31856(SensorBase):
"16" : MAX31856_CR1_AVGSEL16
}
value |= config.getchoice('tc_averaging_count', averages, "1")
cmds.append(0x80 + MAX31856_CR1_REG)
cmds.append(value)
value = (MAX31856_MASK_VOLTAGE_UNDER_OVER_FAULT |
MAX31856_MASK_THERMOCOUPLE_OPEN_FAULT)
cmds.append(0x80 + MAX31856_MASK_REG)
cmds.append(value)
return cmds