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9 years, 7 months ago.
how to use two SPI in one code?
Hello, i would like to ask how can i use Two spi buses in one code? how to write numbers so i can declare which is SPI 1 and which is SPI 2 bus ?
1 Answer
9 years, 7 months ago.
Have a look at the pinout diagram on the platform page. In your case it looks like you're using the ST Nucleo F401RE. You'll see a few different groups of SPI pins.
In example program you've used it refers to the pins like this...
SPI device(SPI_MOSI, SPI_MISO, SPI_SCK);
SPI_MOSI is an alias for PA_7, SPI_MISO is PA_6, SPI_SCK is PA_5 so if you were to change the line to
SPI device(PA_7, PA_6, PA_5);
it would function the same way.
It means you can also define a second SPI instance using another set of SPI pins, for example you could use.
SPI device2(PB_5, PB_4, PB_3);