A platform agnostic library for the Texas Instruments DAC8568.
DAC8568 are low-power, voltage-output, eight-channel, 12-, 14- and 16-bit digital-to-analog converters, respectively. These devices include a 2.5V, 2ppm/°C internal reference (disabled by default), giving a full-scale output voltage range of 2.5V or 5V. The internal reference has an initial accuracy of 0.004% and can source up to 20mA at the VREFIN/VREFOUT pin. These devices are monotonic, providing excellent linearity and minimizing undesired code-to-code transient voltages (glitch). They use a versatile 3-wire serial interface that operates at clock rates up to 50MHz. The interface is compatible with standard SPI™, QSPI™, Microwire™, and digital signal processor (DSP) interfaces.
- Support for Texas Instruments DAC8568
- Full no-std support
- Implemented with
- Blocking and non-blocking support
- Basic feature set including synchronous static mode
Feel free to create an issue and PR if you would like to add support for the more advanced features
- Asynchronous modes utilizing the LDAC line
- Flexible mode
- Generic support for DAC7568 (12-Bit) and DAC8168 (14-Bit)
Note: Quick example based on the
// Initialise SPI. Ensure correct polarity and phase are respected let spi: Spi<SPI1, Enabled> = interface.spi( (sck, NoMiso, mosi), spi::MODE_1, // polarity: Polarity::IdleLow, // phase: Phase::CaptureOnSecondTransition, 20.mhz(), prec, clocks, ); // Initialise SYNC for SPI communications let sync = sync.into_push_pull_output(); // Initialize the dac instance let mut dac = dac8568::Dac::new(spi, sync); // Configure the DAC to use the internal 2.5v reference dac.use_internal_reference().unwrap(); // Optionally, invert the output signal dac.set_inverted_output(true); // Now transfer the data to update the DAC as a blocking call dac.set_voltage(dac8568::Channel::A, voltage).unwrap(); // Alternatively, you can maintain ownership of the SPI and SYNC if you need to use // asynchronous communication such as Interrupts and/or DMA let (spi, sync) = dac.release(); // And then access the desired message directly let message = dac8568::Message::get_voltage_message(dac8568::Channel::A, voltage, false); // Get the message data-frame that can be transferred manually let payload = message.get_payload(); // And then write the message bytes to a DMA RAM buffer