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    I tried the i2c version (same version as I have...

    I tried the i2c version (same version as I have now but you just connect some jumper pads on the back to switch between i2c and spi). With i2c the display runs so slow that my dac writes and the...
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    I am not sure what you are referring to as not...

    I am not sure what you are referring to as not having the beginTransaction, the libraries I am using for the OLED and graphics are a significant mod to the Adafruit library by sumotoy here: ...
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    I guess one of the things that is confusing to me...

    I guess one of the things that is confusing to me is that if the DOUT/MOSI pin is sending SPI - DMA to OLED, then if I want to write out the word to the SPI DAC on the same pin, would there even be a...
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    Here is a code snippet of my current stripped...

    Here is a code snippet of my current stripped down test:
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    DMA with OLED and DAC

    I am currently trying to speed up communication on my project by using DMA. It appears when I use the test example for the OLED_ssd1306 library it works fine, but when I try to use my spi DAC things...
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