Analog I/O dead

tobias_s

Hello! On my bela the analog I/O seems to be dead. i made custom hardware with potentiometers and analog out and it worked fine. then i worked on another part of the project and now it does not work anymore.
In the mean time i did sth stupid, that is i shut down bela while it was copying on the emmc. i used the shutdown button however the emmc still got corrupted. i flashed an sd card and cloned the image to the emmc, now it works again. In the process I also removed the cape for testing.
The steps above should not damage the analog I/O and it could have been something completely different, however this is the only unusual thing that happened since it last worked.
the hardware looks fine, no corrosion etc.

Since the version was updated when i repaired the emmc i thought it may be a problem with the version and so i also installed the older v3.7d - still no change.
All the potentiometers read a constant value of 0.999985 using analogRead()
I put a photo of a minimal setup. When running Examples/analog/analog-input nothing changes when rotating the potti.
i also tried the analog-output example with an led - no light on the led (the led was on when i connected the + side to 3.3v)

Do you have an idea what could be the problem?
I guess something in the hardware fried ...

tobias_s

p.s. i just found out that within the first 2 seconds the values increase until they reach the maximum. they all are exactly the same. Here is an rt_printf-output every 0.01 seconds from the start of the program:

Potentiometer Values: 0.036054, 0.036054, 0.036054, 0.036054, 0.036054, 0.036054, 0.036054, 0.036054,
Potentiometer Values: 0.072387, 0.072387, 0.072387, 0.072387, 0.072387, 0.072387, 0.072387, 0.072387,
Potentiometer Values: 0.107625, 0.107625, 0.107625, 0.107625, 0.107625, 0.107625, 0.107625, 0.107625,
Potentiometer Values: 0.141800, 0.141800, 0.141800, 0.141800, 0.141800, 0.141800, 0.141800, 0.141800,
Potentiometer Values: 0.174945, 0.174945, 0.174945, 0.174945, 0.174945, 0.174945, 0.174945, 0.174945,
Potentiometer Values: 0.207091, 0.207091, 0.207091, 0.207091, 0.207091, 0.207091, 0.207091, 0.207091,
Potentiometer Values: 0.238268, 0.238268, 0.238268, 0.238268, 0.238268, 0.238268, 0.238268, 0.238268,
Potentiometer Values: 0.268504, 0.268504, 0.268504, 0.268504, 0.268504, 0.268504, 0.268504, 0.268504,
Potentiometer Values: 0.297829, 0.297829, 0.297829, 0.297829, 0.297829, 0.297829, 0.297829, 0.297829,
Potentiometer Values: 0.326270, 0.326270, 0.326270, 0.326270, 0.326270, 0.326270, 0.326270, 0.326270,
Potentiometer Values: 0.353854, 0.353854, 0.353854, 0.353854, 0.353854, 0.353854, 0.353854, 0.353854,
Potentiometer Values: 0.380606, 0.380606, 0.380606, 0.380606, 0.380606, 0.380606, 0.380606, 0.380606,
Potentiometer Values: 0.406551, 0.406551, 0.406551, 0.406551, 0.406551, 0.406551, 0.406551, 0.406551,
Potentiometer Values: 0.431714, 0.431714, 0.431714, 0.431714, 0.431714, 0.431714, 0.431714, 0.431714,
Potentiometer Values: 0.456119, 0.456119, 0.456119, 0.456119, 0.456119, 0.456119, 0.456119, 0.456119,
Potentiometer Values: 0.479787, 0.479787, 0.479787, 0.479787, 0.479787, 0.479787, 0.479787, 0.479787,
Potentiometer Values: 0.502743, 0.502743, 0.502743, 0.502743, 0.502743, 0.502743, 0.502743, 0.502743,
Potentiometer Values: 0.525006, 0.525006, 0.525006, 0.525006, 0.525006, 0.525006, 0.525006, 0.525006,
Potentiometer Values: 0.546598, 0.546598, 0.546598, 0.546598, 0.546598, 0.546598, 0.546598, 0.546598,
Potentiometer Values: 0.567539, 0.567539, 0.567539, 0.567539, 0.567539, 0.567539, 0.567539, 0.567539,
Potentiometer Values: 0.587848, 0.587848, 0.587848, 0.587848, 0.587848, 0.587848, 0.587848, 0.587848,
Potentiometer Values: 0.607546, 0.607546, 0.607546, 0.607546, 0.607546, 0.607546, 0.607546, 0.607546,
Potentiometer Values: 0.626649, 0.626649, 0.626649, 0.626649, 0.626649, 0.626649, 0.626649, 0.626649,
Potentiometer Values: 0.645177, 0.645177, 0.645177, 0.645177, 0.645177, 0.645177, 0.645177, 0.645177,
Potentiometer Values: 0.663146, 0.663146, 0.663146, 0.663146, 0.663146, 0.663146, 0.663146, 0.663146,
Potentiometer Values: 0.680573, 0.680573, 0.680573, 0.680573, 0.680573, 0.680573, 0.680573, 0.680573,
Potentiometer Values: 0.697475, 0.697475, 0.697475, 0.697475, 0.697475, 0.697475, 0.697475, 0.697475,
Potentiometer Values: 0.713867, 0.713867, 0.713867, 0.713867, 0.713867, 0.713867, 0.713867, 0.713867,
Potentiometer Values: 0.729765, 0.729765, 0.729765, 0.729765, 0.729765, 0.729765, 0.729765, 0.729765,
Potentiometer Values: 0.745184, 0.745184, 0.745184, 0.745184, 0.745184, 0.745184, 0.745184, 0.745184,
Potentiometer Values: 0.760138, 0.760138, 0.760138, 0.760138, 0.760138, 0.760138, 0.760138, 0.760138,
Potentiometer Values: 0.774641, 0.774641, 0.774641, 0.774641, 0.774641, 0.774641, 0.774641, 0.774641,
Potentiometer Values: 0.788707, 0.788707, 0.788707, 0.788707, 0.788707, 0.788707, 0.788707, 0.788707,
Potentiometer Values: 0.802349, 0.802349, 0.802349, 0.802349, 0.802349, 0.802349, 0.802349, 0.802349,
Potentiometer Values: 0.815579, 0.815579, 0.815579, 0.815579, 0.815579, 0.815579, 0.815579, 0.815579,
Potentiometer Values: 0.828411, 0.828411, 0.828411, 0.828411, 0.828411, 0.828411, 0.828411, 0.828411,
Potentiometer Values: 0.840855, 0.840855, 0.840855, 0.840855, 0.840855, 0.840855, 0.840855, 0.840855,
Potentiometer Values: 0.852925, 0.852925, 0.852925, 0.852925, 0.852925, 0.852925, 0.852925, 0.852925,
Potentiometer Values: 0.864631, 0.864631, 0.864631, 0.864631, 0.864631, 0.864631, 0.864631, 0.864631,
Potentiometer Values: 0.875983, 0.875983, 0.875983, 0.875983, 0.875983, 0.875983, 0.875983, 0.875983,
Potentiometer Values: 0.886994, 0.886994, 0.886994, 0.886994, 0.886994, 0.886994, 0.886994, 0.886994,
Potentiometer Values: 0.897672, 0.897672, 0.897672, 0.897672, 0.897672, 0.897672, 0.897672, 0.897672,
Potentiometer Values: 0.908029, 0.908029, 0.908029, 0.908029, 0.908029, 0.908029, 0.908029, 0.908029,

giuliomoro

In the image you have a Bela cape rev C. That requiere image v0.3.8h , can you install that and try again, please?

tobias_s

oh my god, that actually worked, thanks so much!
I thought i had installed v0.3.8h already, but it was v0.3.8f i dont know why i did that...