File SpiBlockingTransmit.cpp

File List > examples > SPI > SpiBlockingTransmit > SpiBlockingTransmit.cpp

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Source Code

#include "daisy_seed.h"

using namespace daisy;

DaisySeed hw;

int main(void)
{
    // Initialize the hardware
    hw.Init();

    // Handle we'll use to interact with SPI
    SpiHandle spi_handle;

    // Structure to configure the SPI handle
    SpiHandle::Config spi_conf;

    spi_conf.mode = SpiHandle::Config::Mode::MASTER; // we're in charge

    spi_conf.periph = SpiHandle::Config::Peripheral::SPI_1; // Use the SPI_1 Peripheral

    // Pins to use. These must be available on the selected peripheral
    spi_conf.pin_config.sclk = seed::D8; // Use pin D8 as SCLK
    spi_conf.pin_config.miso = Pin(); // We won't need this
    spi_conf.pin_config.mosi = seed::D10; // Use D10 as MOSI
    spi_conf.pin_config.nss = seed::D7; // use D7 as NSS

    // data will flow from master to slave over just the MOSI line
    spi_conf.direction = SpiHandle::Config::Direction::TWO_LINES_TX_ONLY;

    // The master will output on the NSS line
    spi_conf.nss = SpiHandle::Config::NSS::HARD_OUTPUT;

    // Initialize the SPI Handle
    spi_handle.Init(spi_conf);

    // loop forever
    while(1) 
    {
        // put these four bytes in a buffer
        uint8_t buffer[4] = {0, 1, 2, 3};

        // transmit those 4 bytes
        spi_handle.BlockingTransmit(buffer, 4);

        // wait 500 ms
        System::Delay(500);
    }
}