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stickbreaker / arduino-esp32

Arduino core for the ESP32
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Question about using RTOS and I2C #49

Closed arminsalcin closed 5 years ago

arminsalcin commented 5 years ago

Hello , I have just a question not an issue .

So i started to work on one esp32 project i must use RTOS as i need to run more tasks independently , so i actually read some sensors and send to server .

My question is as i have about 4-5 I2C devices, and suspect that in RTOS I2C get unstable and crash sometime causing module to restart. So what i do is every communication with devices over I2C i put like semaphores so only one communication at a time is available , i think that it crash when i have more tasks reading sensors maybe two tasks reading different sensor go immediately one after another.

What is solution or is it okay to do like this , or to remove so I2C can be used in RTOS as in normal running code.

stickbreaker commented 5 years ago

@arminsalcin The current Wire() implementation only supports Single Thread access. So, you will need to create a MUTEX around all Wire() transactions. Each of your threads will need to grab and release the MUTEX semaphore around their transactions.

Chuck.

arminsalcin commented 5 years ago

Thank you , you saved my project !

Have a nice day !