// Setup the DAC's SPI bus and SYNC pin
let gpioc = p.GPIOC.split();
let spi3_sclk = gpioc.pc10.into_alternate();
let spi3_miso = gpioc.pc11.into_alternate();
let spi3_mosi = gpioc.pc12.into_alternate();
// We are using the ~SYNC pin as CS with ~LDAC tied to ground this puts
// the device in individual update mode, loading the dac register on each
// write operation
let gpioa = p.GPIOA.split();
let spi3_dac_sync = gpioa
    .pa15
    .into_push_pull_output_in_state(hal::gpio::PinState::High);
// SPI Instance initialization in MODE 2
let spi3 = Spi::new(
    p.SPI3,
    (spi3_sclk, spi3_miso, spi3_mosi),
    Mode {
            phase: hal::spi::Phase::CaptureOnFirstTransition,
            polarity: hal::spi::Polarity::IdleHigh,
    },
    1.MHz(),
    &ccdr,
);
// SPI Bus creation using embedded-hal-bus
let spi_bus = RefCell::new(spi3);
// Creating shared DAC SPI Device
let mut dac = Ad57xxShared::new_ad57x4(RefCellDevice::new(&spi_bus, spi3_dac_sync, NoDelay));
// Setup the DAC as desired.
dac.set_power(ad57xx::ad57x4::Channel::AllDacs, true).unwrap();
dac.set_output_range(ad57xx::ad57x4::Channel::AllDacs, ad57xx::OutputRange::Bipolar5V)
    .unwrap();
// Output a value (left-aligned 16 bit)
dac.set_dac_output(ad57xx::ad57x4::Channel::DacA, 0x9000).unwrap();