There is no USPS pickup on Monday Feb 15th, 2016 because of President's Day. USPS orders placed after 11am EST Fri February 12th will go out Tuesday February 16. UPS orders will ship as normal.

Code for OLED Character display with RW pin grounded
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Code for OLED Character display with RW pin grounded

by nachoHacker on Sat Feb 23, 2013 9:07 pm

I've got this display.

I want to free up a pin on my arduino. I want to tie the RW pin of the OLED display to ground.

How can I use the Adafruit OLED library when the RW pin is grounded?

This line, for example, forces me to declare a RW pin, but I don't want the arduino to deal with a RW pin:
Code: Select all | TOGGLE FULL SIZE
Adafruit_CharacterOLED lcd(4, 5, 6, 7, 8, 9, 10);
nachoHacker
 
Posts: 8
Joined: Sun May 06, 2012 1:30 am

Re: Code for OLED Character display with RW pin grounded

by adafruit_support_bill on Sun Feb 24, 2013 9:55 am

How can I use the Adafruit OLED library when the RW pin is grounded?

You can't. At least not with our library. The command timing data in the manufacturer's spec sheet is 100% fictitious and after many-many hours of trying to determine the appropriate delays required for various command sequences, we were unable to come up with a reasonable set of timings that worked reliably in all cases. No-one to my knowledge has been able to run these reliably without the RW pin.

Here is another take on the subject: viewtopic.php?f=8&t=29207&p=183258

adafruit_support_bill
 
Posts: 45791
Joined: Sat Feb 07, 2009 10:11 am

Please be positive and constructive with your questions and comments.