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olikraus / u8g2

U8glib library for monochrome displays, version 2
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Voltage on GPIO D12 when using HW SPI #1063

Closed aviator93 closed 4 years ago

aviator93 commented 4 years ago

Hello

I have a rather large sketch running on my Arduino Nano Every to control 3 stepper Motors, an OLED and a rotary Encoder.

On the Every, SW SPI is very slow, so I use HW SPI. This works very fast, but every time I use HW SPI I have a small voltage on GPIO D12. As my stepper Motor is connected to this port, it is always turning slowly. All my digital ports are used, so I can't use a different one but Pin 12.

Does anybody have an idea how I can prevent this from happening? I would love to use HW SPI...

These are the constructors I use:

U8G2_SSD1327_WS_128X128_1_4W_SW_SPI u8g2(U8G2_R0, / clock=/ 13, / data=/ 11, / cs=/ 10, / dc=/ 9, / reset=/ U8X8_PIN_NONE);

U8G2_SSD1327_WS_128X128_1_4W_HW_SPI u8g2(U8G2_R0, / cs=/ 10, / dc=/ 9, / reset=/ U8X8_PIN_NONE);

Thanks in advance! Dominik

aviator93 commented 4 years ago

Good news! Problem is not solved but I found a way to use a different gpio instead of 12. The every has even more Digital Pins than the Nano, I didn't know.

olikraus commented 4 years ago

I think Arduino SPI will always use D12 (MISO)

aviator93 commented 4 years ago

thanks Oli for your quick reply! Thats what I thought myself too...