MRAA and I2C Display

Question

Pastebin URL: https://pastebin.com/QgCNn7eD

Anyhow, I'm using the SSD1306 I2C screen module. I'm programming in Python, and have it working pretty well, for the most part.hat is,

Until I try to use MRAA to read analog inputs. Suddenly, the screen will not turn on.

With the commented section commented, the screen turns on. Uncommented, it turns off, even though the code still runs in the terminal.

Has anyone else had this problem, is it documented somewhere, or is something else wrong that I'm doing, involving using both?

vandia · Accepted Answer

So, according to: http://www.intel.com/content/dam/support/us/en/documents/edison/sb/edison-arduino-hardware-guide.pdf Don't use Analog 5/6 if you plan to use I2C, they both use the same Arduino pin. This seems to be a thing with the Atmega chip, not the Edison itself.I hope this helps someone in the future! For Future Search Results of others: Can't Read Analog while using I2C because shared pin on Arduino Edison Above is worded in a way search engines would recognize it, please excuse the grammar, normal folks! I sincerely thank you for your input, Andy! But since I already thought of that, and had to find the documentation myself, I'm marking this the correct answer for having a direct reference to conflicting pins (and changing tags).

Workshopshed · Answer

There are shared pins on the Edison, is that analogue pin used for something else? Have you tried a different pin?

Workshopshed · Answer

Perhaps in the hardware guide for the Edison breakout? There are ways to emulate an analogue pin with two digital pins and a timer if you need or an external A-D chip

MRAA and I2C Display

Top Replies