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thermocouple: Report fault information in fault field 

Send the fault information explicitly in the query_thermocouple fault
field for max6675, max31855, and max31865.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2022-09-19 13:28:45 -04:00
parent ddb59440a8
commit 4e930294b8
2 changed files with 12 additions and 18 deletions
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12
klippy/extras/spi_temperature.py
View File

@ -193,11 +193,11 @@ class MAX31855(SensorBase):
def __init__(self, config):
SensorBase.__init__(self, config, "MAX31855", spi_mode=0)
def calc_temp(self, adc, fault):
if adc & 0x1:
if fault & 0x1:
self.fault("MAX31855 : Open Circuit")
if adc & 0x2:
if fault & 0x2:
self.fault("MAX31855 : Short to GND")
if adc & 0x4:
if fault & 0x4:
self.fault("MAX31855 : Short to Vcc")
adc = adc >> MAX31855_SCALE
# Fix sign bit:
@ -222,9 +222,9 @@ class MAX6675(SensorBase):
def __init__(self, config):
SensorBase.__init__(self, config, "MAX6675", spi_mode=0)
def calc_temp(self, adc, fault):
if adc & 0x02:
if fault & 0x02:
self.fault("Max6675 : Device ID error")
if adc & 0x04:
if fault & 0x04:
self.fault("Max6675 : Thermocouple Open Fault")
adc = adc >> MAX6675_SCALE
# Fix sign bit:
@ -293,7 +293,7 @@ class MAX31865(SensorBase):
self.fault("Max31865 VRTD- is less than 0.85 * VBIAS, FORCE- open")
if fault & 0x04:
self.fault("Max31865 Overvoltage or undervoltage fault")
if fault & 0x03:
if not fault & 0xfc:
self.fault("Max31865 Unspecified error")
adc = adc >> 1 # remove fault bit
R_div_nominal = adc * self.adc_to_resist_div_nominal

18
src/thermocouple.c
View File

@ -90,6 +90,8 @@ thermocouple_respond(struct thermocouple_spi *spi, uint32_t next_begin_time
/* 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)
try_shutdown("Thermocouple reader fault");
}
static void
@ -101,10 +103,7 @@ thermocouple_handle_max31855(struct thermocouple_spi *spi
uint32_t value;
memcpy(&value, msg, sizeof(value));
value = be32_to_cpu(value);
thermocouple_respond(spi, next_begin_time, value, 0, oid);
// Kill after data send, host decode an error
if (value & 0x04)
try_shutdown("Thermocouple reader fault");
thermocouple_respond(spi, next_begin_time, value, value & 0x07, oid);
}
#define MAX31856_LTCBH_REG 0x0C
@ -142,10 +141,8 @@ thermocouple_handle_max31865(struct thermocouple_spi *spi
msg[0] = MAX31865_FAULTSTAT_REG;
msg[1] = 0x00;
spidev_transfer(spi->spi, 1, 2, msg);
thermocouple_respond(spi, next_begin_time, value, msg[1], oid);
// Kill after data send, host decode an error
if (value & 0x0001)
try_shutdown("Thermocouple reader fault");
uint8_t fault = (msg[1] & ~0x03) | (value & 0x0001);
thermocouple_respond(spi, next_begin_time, value, fault, oid);
}
static void
@ -157,10 +154,7 @@ thermocouple_handle_max6675(struct thermocouple_spi *spi
uint16_t value;
memcpy(&value, msg, sizeof(msg));
value = be16_to_cpu(value);
thermocouple_respond(spi, next_begin_time, value, 0, oid);
// Kill after data send, host decode an error
if (value & 0x04)
try_shutdown("Thermocouple reader fault");
thermocouple_respond(spi, next_begin_time, value, value & 0x06, oid);
}
// task to read thermocouple and send response