Crate ads129xx

Expand description

Driver crate for the Texas Instruments ADS1292 24-bit 2-channel low-power analog front end for ECG applications.

This initial version supports the ADS1292 (for the most part), but it’s a goal to support the ADS1291 and ADS1292R as well.

Usage:

// spi: spi interface
// ncs: not-Chip-Select pin
// timer: timer, 500kHz timeout.

let spi_device = SpiDevice::new(spi, ncs, timer)?;
let mut ads = Ads1292::init(spi_device)?;

// start conversions
ads.cmd(ads129xx::Command::START).unwrap();
ads.wait(200)?; // Wait a while in between sending commands
ads.cmd(ads129xx::Command::RDATAC).unwrap();
ads.wait(200)?;

let mut stream = ads.into_data_stream()?;

let mut buf = [[ChannelData::default(); 2]; 10];

// Opens stream, sends RDATAC command to ads
let data_stream = ads1292.into_data_stream()?;
ads.wait(200)?;

// A buffer to read data into
let mut buf = [[Ads1292Data::default(); 2]; 2000];

for i in buf.iter_mut() {
   // some way of finding out NDRDY has been low since last read (preferably by an interrupt-set flag)
   // data_stream always returns data (for now), so we can unwrap here
   *i = data_stream.next().unwrap()?;
}
// Don't forget to close; this will send the SDATAC command to the ads
data_stream.into_inner();

Modules§

ads1292: Ads1292-specific code
data: Data representation
spi: SPI interface

Structs§

ChannelSettings: Configuration for the register that configures the power mode, PGA gain, and multiplexer settings channels.
Conf1: Configuration for the register that configures each ADC channel sample rate.
Conf2: Configuration for the register that configures the test signal, clock, reference and LOFF buffer.
Loff: Configuration for the register that configures the lead-off detection operation.
LoffSense: Configuration for the register that selects the positive and negative side from each channel for lead-off detection.
RLDSenseSelection: Configuration for the register that controls the selection of the positive and negative signals from each channel for right leg drive derivation.
RespConf2: Configuration for the register that controls the respiration and calibration functionality.

Enums§

Ads129xxError
ChopFrequency
Command: SPI commands
GainSetting
InputSelection
LeadOffCurrentMagnitude
Register: Read / write-able registers
SampleRate

Traits§

Ads129xx: Represents any ADS129xx device

Type Aliases§