ESP32 Forum

I have an interesting bug in my code.
First a little background I'm trying to make a "simple" menu system together with freeRTOS, an encoder and an I2C LCD (16x2).

I have a string array just sitting there in the code doing nothing. Somehow it's printed to the LCD.
Never does Lcd.print make a call to that string.
here below is the sting on line 44 - 46.

Then I thought well let's remove this string and when that bug happens t esp32 crashes with a LoadProhibited fault.
I know what this error means (it means you can't read this bit of memory) so think this is just the way I send the data out to the lcd.

I have uploaded the code to Github https://github.com/sebasdt/BUGS/tree/ma ... ystem_test and here is a video what happens https://youtu.be/LcgOLV3JvBM.

thank you for the help in advance.

The raw encoder value is ultimately being used as the index for array Keuzes, without any checking. If it isn't conveniently 0, 1, or 2 then all bets are off.

Whatever value it was (-1?) just happened to be the offset to one of the pointers ("Back"?) in your other 'unused' array.

boarchuz wrote: ↑

Wed Jan 06, 2021 10:48 am

The raw encoder value is ultimately being used as the index for array Keuzes, without any checking. If it isn't conveniently 0, 1, or 2 then all bets are off.

thanks for the tip! I overshot the index of the array. and have fixed it