Toit
#Hi, trying to fill a list, below is my code and result.
Thread channel in help
Macca 04/04/2023 06:27 AM
import gpio
import gpio.adc show Adc
SampleSize := 3
Sample := 0
SampleTotal := 0.0
adc := Adc (gpio.Pin 34)
Readings := []
main:
for i := 0; i < SampleSize; i += 1:
Readings[i] = adc.get
sleep --ms=1
//print Readings[i]
Calculate_RMS
sleep --ms=10000
Calculate_RMS:
Readings.do: SampleTotal = SampleTotal + it.SampleTotal
print SampleTotal
print Sample
Decoding by
**
EXCEPTION error.
OUT_OFBOUNDS
0: List .[]= <sdk>/core/collections.toit:1865:24
1: main adc_test.toit:14:17
**
import gpio.adc show Adc
SampleSize := 3
Sample := 0
SampleTotal := 0.0
adc := Adc (gpio.Pin 34)
Readings := []
main:
for i := 0; i < SampleSize; i += 1:
Readings[i] = adc.get
sleep --ms=1
//print Readings[i]
Calculate_RMS
sleep --ms=10000
Calculate_RMS:
Readings.do: SampleTotal = SampleTotal + it.SampleTotal
print SampleTotal
print Sample
Decoding by
jagEXCEPTION error.
OUT_OF
0: List
1: main adc_test.toit:14:17
Macca 04/04/2023 06:30 AM
line 14 is Readings[i] = adc.get
Macca 04/04/2023 06:57 AM
After much trial & error I fixed it. My answer was:
Macca 04/04/2023 06:57 AM
for i := 0;i < SampleSize - 1; i += 1:
Reading = adc.get
Readings.add Reading
Reading = adc.get
Readings.add Reading
bitphlipphar 04/04/2023 09:11 AM
i < SampleSize was correct.
bitphlipphar 04/04/2023 09:12 AM
... and an alternative to calling add (which grows the list) is to do
Readings := List SampleSizebitphlipphar 04/04/2023 09:13 AM
You can even try
Readings := List SampleSize: adc.getbitphlipphar 04/04/2023 09:13 AM
It calls the block passed to the list constructor SampleSize times.
bitphlipphar 04/04/2023 09:14 AM
You can sleep from within there too.
Macca 04/05/2023 07:46 AM
Thanks @bitphlipphar , yes I discovered that Readings kept growing, so cleared it after each "loop" I will try your suggestion.(edited)
10 messages in total