Wire.h not found during build in an external library

erbfrog07 · July 20, 2022, 2:44am

I’m using the arduino framework, and trying to use the OV767X@^0.0.2 library, published by arduino (linked here:PlatformIO Registry) on an esp32, but am getting an error upon building that states “Wire.h not found”. I’ve tried, as follows from other forums, to include wire.h as a lib_dep, but this just introduces a whole new string of errors. The vs-code auto-compiler (I think, not sure what it’s called, but produces the red lines) does not mark this as missing. Anyone know what the problem could be here? Thank you in advance. Below is my .ini file, nothing else in the code has been modified

maxgerhardt · July 20, 2022, 6:57am

Do you have #include <Arduino_OV767X.h> on your main.cpp? PlatformIO won’t scan the dependencies otherwise.

maxgerhardt · July 20, 2022, 7:03am

Also looking at PlatformIO Registry, the last release date is very old in comparison to the actual new commits (Commits · arduino-libraries/Arduino_OV767X · GitHub), so conside using lib_deps = https://github.com/arduino-libraries/Arduino_OV767X.git if errors pop up.

erbfrog07 · July 21, 2022, 1:29am

I did not, included this and wire compiled, thank you! I do now have a bunch of other errors so will attempt your second comment

erbfrog07 · July 21, 2022, 1:32am

Unfortunately this did not change the errors, but will keep it as the dependency given the new commits. Not sure what the other errors are born from, but it involves many functions and variables assumed to be declared such as “NRF_GPIO_Type” not being declared in the scope. Any knowledge regarding where these could source from?

maxgerhardt · July 21, 2022, 9:41am

Okay this code is completely useless to you, it assumes you’re running an nRF52 microcontroller, hence the NRF_I2S register / peripheral references that try to generate the master clock

github.com

arduino-libraries/Arduino_OV767X/blob/master/src/OV767X.cpp#L358-L369


      
          void OV767X::beginXClk()
          {
            // Generates 16 MHz signal using I2S peripheral
            NRF_I2S->CONFIG.MCKEN = (I2S_CONFIG_MCKEN_MCKEN_ENABLE << I2S_CONFIG_MCKEN_MCKEN_Pos);
            NRF_I2S->CONFIG.MCKFREQ = I2S_CONFIG_MCKFREQ_MCKFREQ_32MDIV2  << I2S_CONFIG_MCKFREQ_MCKFREQ_Pos;
            NRF_I2S->CONFIG.MODE = I2S_CONFIG_MODE_MODE_MASTER << I2S_CONFIG_MODE_MODE_Pos;
          
          
  NRF_I2S->PSEL.MCK = (digitalPinToPinName(_xclkPin) << I2S_PSEL_MCK_PIN_Pos);
          
          
  NRF_I2S->ENABLE = 1;
            NRF_I2S->TASKS_START = 1;
          }

Looking at Arduino_OV767X/library.properties at master · arduino-libraries/Arduino_OV767X · GitHub, it’s for the ArduinoCore-mbed, likely the Nano 33 BLE board, not an ESP32.

maxgerhardt · July 21, 2022, 9:48am

You may want to look into GitHub - bitluni/ESP32CameraI2S if you want to use only Arduino, or the “full” library from Espressif with GitHub - espressif/esp32-camera, but this for ESP-IDF. Still, you can* use Arduino on top of ESP-IDF per this, but I recommend to test the camera in a ESP-IDF-only program as intended first.

erbfrog07 · July 21, 2022, 3:26pm

That’s tough, Arduino said on their site that it was applicable to all boards using the Arduino framework but Iooks like that was a lie. I’ll try it with the Arduino only library right now; was looking into using the esp32 espidf based framework but decided it was a bad idea as learning to use it will take a long time, thank you again for your help here!