Oled display SDD1305

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Alfredoadafruit
 
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Oled display SDD1305

Post by Alfredoadafruit »

Dear all: we recently acquired from your Italian representative and seller (Robot Italy) few "Adalogger feather M0" boards and "OLED 2,47 - 128x64 SSD1305" displays.

After installing the libraries (Adafruit_SSD1305, Adafruit_GFX), when "feather M0" is in use, the sketch of test that Adafruit proposes ("ssd1305test") is rejected and refused, even with the plate disconnected.
We realize that only when set on "Arduino uno" the verification passes positively the test.

We kindly ask you where we can acquire other sketch of test for “SSD1305” which could be suitable to work on "Adafruit feather M0" boards.

Please consider that the “OLED” module will have to communicate with "Mode I2C" e that “Jamper R18 and R21” resistances have been already properly put in place.
Many thanks for your assistance.

Kindest regards,

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adafruit_support_rick
 
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Re: Oled display SDD1305

Post by adafruit_support_rick »

I just updated the ssd1305 library this morning to work with the M0. Please try it. The library should be available from the Library Manager. If not, you can get it here:
https://github.com/adafruit/Adafruit_SSD1305_Library

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Alfredoadafruit
 
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Re: Oled display SDD1305

Post by Alfredoadafruit »

Thanks for modifying the sketch now it passes the test but the test only works in SPI MODE.

I need to use it exclusively in I2C MODE.

I attach the photos and screen shot of the current situation, kindly ask you to help me understand what the problem is.

Thank you
I2C MODE
I2C MODE
I2C mode.jpg (124.89 KiB) Viewed 288 times
I2C Wiring
I2C Wiring
I2C Wiring.jpg (104.47 KiB) Viewed 288 times
Test code change
Test code change
Screenshot change the top area.JPG (39.04 KiB) Viewed 288 times

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adafruit_support_rick
 
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Re: Oled display SDD1305

Post by adafruit_support_rick »

Looks OK, but you don't want the resistive divider on RST, since the voltage level is already 3.3V. Maybe that's the problem.

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Alfredoadafruit
 
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Re: Oled display SDD1305

Post by Alfredoadafruit »

I tried without resistive divider but did not change anything, the display stays completely off.
I do not think the display is defective, as SPI mode works perfectly.
Do you have the ability to test the same display in I2C mode with a M0 feather and the new sketch?
I would be sure that the display, the feather M0 and I2C mode are compatible.

Thanks

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adafruit_support_rick
 
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Re: Oled display SDD1305

Post by adafruit_support_rick »

i don't have the equipment with me right now, I'll see what I can do over the weekend

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adafruit_support_rick
 
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Re: Oled display SDD1305

Post by adafruit_support_rick »

Well, I discovered that I don't have an SSD1305 display after all. I'll have to get one before I can check this out.
Sorry - I'll get one as soon as possible.

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adafruit2
 
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Re: Oled display SDD1305

Post by adafruit2 »

it works, make sure you add 2x 10K pullups to SDA and SCL to 3.3V!

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Alfredoadafruit
 
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Re: Oled display SDD1305

Post by Alfredoadafruit »

True, I did not put the pull-up resistors! In the instructions of the display it was not indicated but I knew it had to be done!

I'm sorry to have made you waste time for this nonsense.

Thank you!

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adafruit2
 
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Re: Oled display SDD1305

Post by adafruit2 »

lol its ok! we updated the guide :)

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