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Topics - peter

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OLEDs / NHD-2.8-25664UCB2 goes dark under heavy updates
« on: December 08, 2016, 09:38:34 AM »
I am using the NHD-2.8-25664UCB2 as the main user feedback during the satellite antenna pointing exercise.  The user needs to know where the antenna should point (azimuth and elevation), where it is currently pointing, and what the current receive signal strength might be.  The updates to three of these items can happen 7 times per second.

I am using:
   Adafruit library
   SPI 4 wire interface
   TS-4600 SBC (https://www.embeddedarm.com/products/TS-4600)

The OLED will go blank (black with no text) or it will freeze after an unspecified amount of time.  The underlying application is still running, we know this through the debian linux OS and with an oscilloscope checking the SCLK, SDIN, DC, CS signals on the display.

The display buffer is cleared before every write to the display, and only one display update can be performed at a time.
I have other configuration / information screens that are accessed through a keypad.  Any of those screen images will display for hours, even days without any issues.

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