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spi_temperature: Don't raise error on a fault - invoke a shutdown 

Raising an error from the background message reception thread isn't
well defined.  Instead, on a temperature fault, invoke a printer
shutdown.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-07-24 15:17:56 -04:00
parent a084c38b41
commit 70f765f62f
1 changed files with 23 additions and 24 deletions
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47
klippy/extras/spi_temperature.py
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@ -19,12 +19,9 @@ TS_CHIP_MAX6675 = 1 << 3
REPORT_TIME = 0.300
class error(Exception):
pass
class SensorBase:
error = error
def __init__(self, config, chip_type, config_cmd=None):
self.printer = config.get_printer()
self._callback = None
self.min_sample_value = self.max_sample_value = 0
self._report_clock = 0
@ -75,6 +72,8 @@ class SensorBase:
last_read_clock = next_clock - self._report_clock
last_read_time = self.mcu.clock_to_print_time(last_read_clock)
self._callback(last_read_time, temp)
def fault(self, msg):
self.printer.invoke_async_shutdown(msg)
######################################################################
@ -139,21 +138,21 @@ class MAX31856(SensorBase):
self.build_spi_init(config))
def calc_temp(self, adc, fault):
if fault & MAX31856_FAULT_CJRANGE:
raise self.error("Max31856: Cold Junction Range Fault")
self.fault("Max31856: Cold Junction Range Fault")
if fault & MAX31856_FAULT_TCRANGE:
raise self.error("Max31856: Thermocouple Range Fault")
self.fault("Max31856: Thermocouple Range Fault")
if fault & MAX31856_FAULT_CJHIGH:
raise self.error("Max31856: Cold Junction High Fault")
self.fault("Max31856: Cold Junction High Fault")
if fault & MAX31856_FAULT_CJLOW:
raise self.error("Max31856: Cold Junction Low Fault")
self.fault("Max31856: Cold Junction Low Fault")
if fault & MAX31856_FAULT_TCHIGH:
raise self.error("Max31856: Thermocouple High Fault")
self.fault("Max31856: Thermocouple High Fault")
if fault & MAX31856_FAULT_TCLOW:
raise self.error("Max31856: Thermocouple Low Fault")
self.fault("Max31856: Thermocouple Low Fault")
if fault & MAX31856_FAULT_OVUV:
raise self.error("Max31856: Over/Under Voltage Fault")
self.fault("Max31856: Over/Under Voltage Fault")
if fault & MAX31856_FAULT_OPEN:
raise self.error("Max31856: Thermocouple Open Fault")
self.fault("Max31856: Thermocouple Open Fault")
adc = adc >> MAX31856_SCALE
# Fix sign bit:
if adc & 0x40000:
@ -213,11 +212,11 @@ class MAX31855(SensorBase):
SensorBase.__init__(self, config, TS_CHIP_MAX31855)
def calc_temp(self, adc, fault):
if adc & 0x1:
raise self.error("MAX31855 : Open Circuit")
self.fault("MAX31855 : Open Circuit")
if adc & 0x2:
raise self.error("MAX31855 : Short to GND")
self.fault("MAX31855 : Short to GND")
if adc & 0x4:
raise self.error("MAX31855 : Short to Vcc")
self.fault("MAX31855 : Short to Vcc")
adc = adc >> MAX31855_SCALE
# Fix sign bit:
if adc & 0x2000:
@ -242,9 +241,9 @@ class MAX6675(SensorBase):
SensorBase.__init__(self, config, TS_CHIP_MAX6675)
def calc_temp(self, adc, fault):
if adc & 0x02:
raise self.error("Max6675 : Device ID error")
self.fault("Max6675 : Device ID error")
if adc & 0x04:
raise self.error("Max6675 : Thermocouple Open Fault")
self.fault("Max6675 : Thermocouple Open Fault")
adc = adc >> MAX6675_SCALE
# Fix sign bit:
if adc & 0x2000:
@ -297,19 +296,19 @@ class MAX31865(SensorBase):
self.build_spi_init(config))
def calc_temp(self, adc, fault):
if fault & 0x80:
raise self.error("Max31865 RTD input is disconnected")
self.fault("Max31865 RTD input is disconnected")
if fault & 0x40:
raise self.error("Max31865 RTD input is shorted")
self.fault("Max31865 RTD input is shorted")
if fault & 0x20:
raise self.error("Max31865 VREF- is greater than 0.85 * VBIAS, FORCE- open")
self.fault("Max31865 VREF- is greater than 0.85 * VBIAS, FORCE- open")
if fault & 0x10:
raise self.error("Max31865 VREF- is less than 0.85 * VBIAS, FORCE- open")
self.fault("Max31865 VREF- is less than 0.85 * VBIAS, FORCE- open")
if fault & 0x08:
raise self.error("Max31865 VRTD- is less than 0.85 * VBIAS, FORCE- open")
self.fault("Max31865 VRTD- is less than 0.85 * VBIAS, FORCE- open")
if fault & 0x04:
raise self.error("Max31865 Overvoltage or undervoltage fault")
self.fault("Max31865 Overvoltage or undervoltage fault")
if fault & 0x03:
raise self.error("Max31865 Unspecified error")
self.fault("Max31865 Unspecified error")
adc = adc >> 1 # remove fault bit
R_rtd = (self.reference_r * adc) / VAL_ADC_MAX
temp = (