The else of this if is 24MHz, what does this number mean ? I read Arduino 101 clock is 32MHz and not 16MHz. SPI.beginTransaction(SPISettings(24000000, MSBFIRST, SPI_MODE0)) įrom my understanding of programming and one told me that ARDUINO_ARCH_ARC32 is related to intel chip but how this if statement works ?! if the condition is true then SPI clock is 16MHz ! But how ? SPI.beginTransaction(SPISettings(16000000, MSBFIRST, SPI_MODE0)) Also I found in a TFT library that uses SPI, this guard piece of code:.SPISettings(uint32_t clock, uint8_t bitOrder, uint8_t dataMode) Like in SPISettings class, what does the clock mean? The 16MHz or the system 2MHz? In the datasheet does Fosc mean the actual oscillator speed or the system speed ?.If the speed for example 15MHz, what should be the SPI speed ?.What is the speed of SPI if I have Arduino Nano ?.I've some questions about relationship between SPI speed and Arduino uni / nano speed.
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