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Add fast moving average filter for faster startup

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This commit is contained in:
Mario Hüttel
2021-01-09 22:26:31 +01:00
parent bbfcd429fe
commit 69ff13a991
2 changed files with 19 additions and 2 deletions
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13
stm-firmware/adc-meas.c
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@@ -303,14 +303,23 @@ void adc_pt1000_disable(void)
static inline __attribute__((optimize("O3"))) void adc_pt1000_filter(float adc_prefiltered_value)
{
float alpha;
float res;
if (filter_startup_cnt > 0) {
filter_startup_cnt--;
if (filter_startup_cnt == 0)
safety_controller_ack_flag_with_key(ERR_FLAG_MEAS_ADC_UNSTABLE, MEAS_ADC_SAFETY_FLAG_KEY);
}
pt1000_res_raw_lf = (1.0f - filter_alpha) * pt1000_res_raw_lf +
filter_alpha * ADC_TO_RES(adc_prefiltered_value);
res = ADC_TO_RES(adc_prefiltered_value);
if (ABS(res - pt1000_res_raw_lf) > 20)
alpha = ADC_PT1000_FILTER_WEIGHT_FAST;
else
alpha = filter_alpha;
pt1000_res_raw_lf = (1.0f - alpha) * pt1000_res_raw_lf +
alpha * res;
safety_controller_report_timing(ERR_TIMING_MEAS_ADC);
}