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Reintroduce AvgAdv, avoid *64 as it could easily overflow

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This reverts partly commit 9189dc8563.
This commit is contained in:
Philippe Teuwen 2020-06-10 00:06:18 +02:00
commit 0ce3be2f34
3 changed files with 15 additions and 11 deletions
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21
armsrc/appmain.c
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@ -137,11 +137,14 @@ static uint16_t ReadAdc(int ch) {
}
// was static - merlok
uint16_t AvgAdc(int ch) {
return SumAdc(ch, 32) >> 5;
}
uint16_t SumAdc(int ch, int NbSamples) {
uint16_t a = 0;
for (uint8_t i = 0; i < NbSamples; i++)
a += ReadAdc(ch);
return (a + (NbSamples >> 1) - 1);
}
@ -225,9 +228,9 @@ static void MeasureAntennaTuning(void) {
static uint16_t MeasureAntennaTuningHfData(void) {
#if defined RDV4
return (MAX_ADC_HF_VOLTAGE_RDV40 * SumAdc(ADC_CHAN_HF_RDV40, 64)) >> 16;
return (MAX_ADC_HF_VOLTAGE_RDV40 * SumAdc(ADC_CHAN_HF_RDV40, 32)) >> 15;
#else
return (MAX_ADC_HF_VOLTAGE * SumAdc(ADC_CHAN_HF, 64)) >> 16;
return (MAX_ADC_HF_VOLTAGE * SumAdc(ADC_CHAN_HF, 32)) >> 15;
#endif
}
@ -540,7 +543,7 @@ void ListenReaderField(uint8_t limit) {
LEDsoff();
if (limit == LF_ONLY) {
lf_av = lf_max = SumAdc(ADC_CHAN_LF, 32) >> 5;
lf_av = lf_max = AvgAdc(ADC_CHAN_LF);
Dbprintf("LF 125/134kHz Baseline: %dmV", (MAX_ADC_LF_VOLTAGE * lf_av) >> 10);
lf_baseline = lf_av;
}
@ -549,9 +552,9 @@ void ListenReaderField(uint8_t limit) {
#if defined RDV4
// iceman, useless, since we are measuring readerfield, not our field. My tests shows a max of 20v from a reader.
hf_av = hf_max = SumAdc(ADC_CHAN_HF_RDV40, 32) >> 5;
hf_av = hf_max = AvgAdc(ADC_CHAN_HF_RDV40);
#else
hf_av = hf_max = SumAdc(ADC_CHAN_HF, 32) >> 5;
hf_av = hf_max = AvgAdc(ADC_CHAN_HF);
#endif
Dbprintf("HF 13.56MHz Baseline: %dmV", (MAX_ADC_HF_VOLTAGE * hf_av) >> 10);
hf_baseline = hf_av;
@ -585,7 +588,7 @@ void ListenReaderField(uint8_t limit) {
LED_D_OFF();
}
lf_av_new = SumAdc(ADC_CHAN_LF, 32) >> 5;
lf_av_new = AvgAdc(ADC_CHAN_LF);
// see if there's a significant change
if (ABS(lf_av - lf_av_new) > REPORT_CHANGE) {
Dbprintf("LF 125/134kHz Field Change: %5dmV", (MAX_ADC_LF_VOLTAGE * lf_av_new) >> 10);
@ -604,9 +607,9 @@ void ListenReaderField(uint8_t limit) {
}
#if defined RDV4
hf_av_new = SumAdc(ADC_CHAN_HF_RDV40, 32) >> 5;
hf_av_new = AvgAdc(ADC_CHAN_HF_RDV40);
#else
hf_av_new = SumAdc(ADC_CHAN_HF, 32) >> 5;
hf_av_new = AvgAdc(ADC_CHAN_HF);
#endif
// see if there's a significant change
if (ABS(hf_av - hf_av_new) > REPORT_CHANGE) {