{

std::array<uint16_t, 100> data{};

constexpr auto HalfOutput = ((1 << 12) - 1) / 2; // 12 bit dac

for (size_t i = 0; i < data.size(); ++i) {

constexpr auto pi = std::numbers::pi_v<float>;

data[i] = HalfOutput * (1 + sin(i * (2*pi / data.size())));

}

return data;

{

Board::initialize();

LedBlue::setOutput();

MODM_LOG_INFO << "DAC Demo" << modm::endl;

// Output ~8 kHz sine / cosine waveforms on gpio A4/A5

Dac::connect<GpioA4::Out1, GpioA5::Out2>();

Dac::initialize();

Dac::enableChannel(Dac::Channel::Channel1);

Dac::enableChannel(Dac::Channel::Channel2);

Dac::enableOutputBuffer(Dac::Channel::Channel1, true);

Dac::enableOutputBuffer(Dac::Channel::Channel2, true);

uint32_t counter = 0;

while (true)

{

constexpr auto size = sinTable.size();

const auto sinIndex = counter % size;

const auto cosIndex = (counter + (size/4)) % size;

counter++;

Dac::setOutput1(sinTable[sinIndex]);

Dac::setOutput2(sinTable[cosIndex]);

LedBlue::toggle();

modm::delay_us(1);

}

return 0;