Justin Mammarella
Justin Mammarella
I didn't realise there were no tests for the OLED display. Here's one that uses the MegaCommand core. ``` #include "OLED.h" /* The screen should turn completely white for 2...
The sketch descriptions should say with core to run against. But I understand it can be easily overlooked.
So on the 3v3 rail it's not working (with HC4050 removed). But attaching to the 5v rail it works?
Do you have a link to the OLED you purchased? For reference, i've built over 30 of these boards. None of which had this OLED problem. I had one dead...
Cool. Well you've found a solution 👍 You should be able rewire the power easily. Out of interest, does the display hum or buzz under 5V ?
Have you tested the SDCard subsystem using the SDCard test firmware. That would be my first check.
Thanks for patching that. I've tested your changes here: Initializing SD card...initialization done. Writing to test.txt...Wrote: 1048576 bytes done. Reading contents from test.txt: SDCard read data matches RAM. File Size:...
Regarding your SDCard issue. First of all, are you using the Yamaichi Micro SD card slot? The MegaCommand board has the facility to use the Yamaichi slot directly (the sd...
I use 8GB Sandisk SDHC cards. I would try and get a replacement Arduino Mega compatible board. Probably going to be cheaper than buying the adafruit sd card breakout. And...
It sounds like you're pretty close to finding the problem. This is the reference diagram for the SRAM from the Atmega 2560 datasheet. With the aid of the Latch, AD7:0...