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thermocouple: Only shutdown on multiple consecutive sensor errors

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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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14
src/thermocouple.c
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@ -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