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thermocouple: Only shutdown on multiple consecutive sensor errors 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2022-09-19 14:20:18 -04:00
parent ec5719585e
commit 51da02b7f8
2 changed files with 20 additions and 10 deletions
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16
klippy/extras/spi_temperature.py
View File

@ -4,7 +4,7 @@
# Copyright (C) 2018 Kevin O'Connor <kevin@koconnor.net>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
import math
import math, logging
from . import bus
@ -13,6 +13,7 @@ from . import bus
######################################################################
REPORT_TIME = 0.300
MAX_INVALID_COUNT = 3
class SensorBase:
def __init__(self, config, chip_type, config_cmd=None, spi_mode=1):
@ -47,9 +48,10 @@ class SensorBase:
self._report_clock = self.mcu.seconds_to_clock(REPORT_TIME)
self.mcu.add_config_cmd(
"query_thermocouple oid=%u clock=%u rest_ticks=%u"
" min_value=%u max_value=%u" % (
" min_value=%u max_value=%u max_invalid_count=%u" % (
self.oid, clock, self._report_clock,
self.min_sample_value, self.max_sample_value), is_init=True)
self.min_sample_value, self.max_sample_value,
MAX_INVALID_COUNT), is_init=True)
def _handle_spi_response(self, params):
if params['fault']:
self.handle_fault(params['value'], params['fault'])
@ -60,7 +62,7 @@ class SensorBase:
last_read_time = self.mcu.clock_to_print_time(last_read_clock)
self._callback(last_read_time, temp)
def report_fault(self, msg):
self.printer.invoke_async_shutdown(msg)
logging.warn(msg)
######################################################################
@ -283,8 +285,8 @@ class MAX31865(SensorBase):
rtd_reference_r = config.getfloat('rtd_reference_r', 430., above=0.)
adc_to_resist = rtd_reference_r / float(MAX31865_ADC_MAX)
self.adc_to_resist_div_nominal = adc_to_resist / rtd_nominal_r
SensorBase.__init__(self, config, "MAX31865",
self.build_spi_init(config))
self.config_reg = self.build_spi_init(config)
SensorBase.__init__(self, config, "MAX31865", self.config_reg)
def handle_fault(self, adc, fault):
if fault & 0x80:
self.report_fault("Max31865 RTD input is disconnected")
@ -303,6 +305,8 @@ class MAX31865(SensorBase):
self.report_fault("Max31865 Overvoltage or undervoltage fault")
if not fault & 0xfc:
self.report_fault("Max31865 Unspecified error")
# Attempt to clear the fault
self.spi.spi_send(self.config_reg)
def calc_temp(self, adc):
adc = adc >> 1 # remove fault bit
R_div_nominal = adc * self.adc_to_resist_div_nominal

14
src/thermocouple.c
View File

@ -28,6 +28,7 @@ struct thermocouple_spi {
uint32_t min_value; // Min allowed ADC value
uint32_t max_value; // Max allowed ADC value
struct spidev_s *spi;
uint8_t max_invalid, invalid_count;
uint8_t chip_type, flags;
};
@ -75,11 +76,13 @@ command_query_thermocouple(uint32_t *args)
return;
spi->min_value = args[3];
spi->max_value = args[4];
spi->max_invalid = args[5];
spi->invalid_count = 0;
sched_add_timer(&spi->timer);
}
DECL_COMMAND(command_query_thermocouple,
"query_thermocouple oid=%c clock=%u rest_ticks=%u"
" min_value=%u max_value=%u");
" min_value=%u max_value=%u max_invalid_count=%c");
static void
thermocouple_respond(struct thermocouple_spi *spi, uint32_t next_begin_time
@ -88,10 +91,13 @@ thermocouple_respond(struct thermocouple_spi *spi, uint32_t next_begin_time
sendf("thermocouple_result oid=%c next_clock=%u value=%u fault=%c",
oid, next_begin_time, value, fault);
/* check the result and stop if below or above allowed range */
if (value < spi->min_value || value > spi->max_value)
try_shutdown("Thermocouple ADC out of range");
if (fault)
if (fault || value < spi->min_value || value > spi->max_value) {
spi->invalid_count++;
if (spi->invalid_count < spi->max_invalid)
return;
try_shutdown("Thermocouple reader fault");
}
spi->invalid_count = 0;
}
static void