OLED display support for nRF52832 (SSD1306, Adafruit GFX)

RE: OLED display support for nRF52832 (SSD1306, Adafruit GFX)

alexSvarc — Wed, 30 Jan 2019 02:24:50 GMT

how do you print text on the display?

RE: OLED display support for nRF52832 (SSD1306, Adafruit GFX)

vohra alihussain — Fri, 05 Oct 2018 13:45:59 GMT

will u tell me between which pins resistor should be placed and of how much value?

RE: OLED display support for nRF52832 (SSD1306, Adafruit GFX)

Sorrow91 — Thu, 05 Oct 2017 15:40:26 GMT

No problem, thank you anyway Makesh! I love your projects, will buying an bluey in near future :)

RE: OLED display support for nRF52832 (SSD1306, Adafruit GFX)

Mahesh Venkitachalam — Thu, 05 Oct 2017 15:17:35 GMT

My code uses Softdevice, and it uses the ARM GCC toolchain. Sorry, but I am not familiar with Keil. The issue as I said is just with linking.

RE: OLED display support for nRF52832 (SSD1306, Adafruit GFX)

Sorrow91 — Thu, 05 Oct 2017 14:07:22 GMT

Hey Makesh,

I tried to figure out where the code is linkin twice, but I can't find where... I uploaded my code to github. IDE is Keil.

github link

Thanks Kevin

RE: OLED display support for nRF52832 (SSD1306, Adafruit GFX)

Mahesh Venkitachalam — Thu, 05 Oct 2017 14:00:21 GMT

...textsize multiply defined (by main.o and adafruit_gfx.o).

You are linking in the same code twice.

How did you build our code? Which SDK, and did you add any extra code?

Regards

Mahesh

RE: OLED display support for nRF52832 (SSD1306, Adafruit GFX)

Sorrow91 — Thu, 05 Oct 2017 09:16:06 GMT

I copied the code into my ble application.

But everytime I get the same errors:

.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol textsize multiply defined (by main.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol rotation multiply defined (by main.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol wrap multiply defined (by main.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol WIDTH multiply defined (by ssd1306.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol WIDTH multiply defined (by main.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol HEIGHT multiply defined (by ssd1306.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol HEIGHT multiply defined (by main.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol _width multiply defined (by main.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol _height multiply defined (by main.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol cursor_x multiply defined (by main.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol cursor_y multiply defined (by main.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol textcolor multiply defined (by main.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol textbgcolor multiply defined (by main.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol _drawPixel multiply defined (by main.o and adafruit_gfx.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol _i2caddr multiply defined (by main.o and ssd1306.o).
.\_build\nrf52832_xxaa.axf: Error: L6200E: Symbol _vccstate multiply defined (by main.o and ssd1306.o).

Can't figure out why this happen.

Can you help me guys?

Thanks