DAC855X examples

demo_hw_spi.ino write a sawtooth to channel A followed by a sinus uses HW SPI

demo_sw_spi.ino write a sawtooth to channel A followed by a sinus uses SW SPI

demo_same_time_write.ino writes two square waves that trigger at the same time

demo_sequential_write.ino writes two square waves sequentially (slight time difference)

demo_powerdown.ino idem