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kirdy-firmware
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AD7172: Add AD7172 drivers fns 

- Port from Thermostat Firmware
This commit is contained in:
linuswck 2024-01-16 16:18:39 +08:00
parent e355e83d28
commit af8d361b95
7 changed files with 830 additions and 1 deletions
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2
Cargo.lock generated
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@ -366,6 +366,8 @@ name = "kirdy"
version = "0.0.0"
dependencies = [
"bare-metal 1.0.0",
"bit_field",
"byteorder",
"cortex-m",
"cortex-m-log",
"cortex-m-rt",

2
Cargo.toml
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@ -34,6 +34,8 @@ rtt-target = { version = "0.3.1", features = ["cortex-m"] }
miniconf = "0.6.3"
serde = { version = "1.0.158", features = ["derive"], default-features = false }
sfkv = "0.1"
bit_field = "0.10"
byteorder = { version = "1", default-features = false }
[features]
semihosting = ["cortex-m-log/semihosting"]
RTT = []

276
src/thermostat/ad7172/adc.rs Normal file
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@ -0,0 +1,276 @@
use core::fmt;
use log::{info, warn};
use stm32f4xx_hal::hal::{
blocking::spi::Transfer,
digital::v2::OutputPin,
};
use uom::si::{
f64::ElectricPotential,
electric_potential::volt,
};
use super::{
regs::{self, Register, RegisterData},
checksum::{ChecksumMode, Checksum},
Mode, Input, RefSource, PostFilter, DigitalFilterOrder,
};
/// AD7172-2 implementation
///
/// [Manual](https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-2.pdf)
pub struct Adc<SPI: Transfer<u8>, NSS: OutputPin> {
spi: SPI,
nss: NSS,
checksum_mode: ChecksumMode,
}
impl<SPI: Transfer<u8, Error = E>, NSS: OutputPin, E: fmt::Debug> Adc<SPI, NSS> {
pub fn new(spi: SPI, mut nss: NSS) -> Result<Self, SPI::Error> {
let _ = nss.set_high();
let mut adc = Adc {
spi, nss,
checksum_mode: ChecksumMode::Off,
};
adc.reset()?;
adc.set_checksum_mode(ChecksumMode::Crc).unwrap();
let mut retries = 0;
let mut adc_id;
loop {
adc_id = adc.identify()?;
if adc_id & 0xFFF0 == 0x00D0 {
break;
} else {
retries += 1;
}
}
info!("ADC id: {:04X} ({} retries)", adc_id, retries);
let mut adc_mode = <regs::AdcMode as Register>::Data::empty();
adc_mode.set_ref_en(true);
adc_mode.set_mode(Mode::Standby);
adc.write_reg(&regs::AdcMode, &mut adc_mode)?;
Ok(adc)
}
/// `0x00DX` for AD7172-2
pub fn identify(&mut self) -> Result<u16, SPI::Error> {
self.read_reg(&regs::Id)
.map(|id| id.id())
}
pub fn set_checksum_mode(&mut self, mode: ChecksumMode) -> Result<(), SPI::Error> {
// Cannot use update_reg() here because checksum_mode is
// updated between read_reg() and write_reg().
let mut ifmode = self.read_reg(&regs::IfMode)?;
ifmode.set_crc(mode);
self.checksum_mode = mode;
self.write_reg(&regs::IfMode, &mut ifmode)?;
Ok(())
}
pub fn set_sync_enable(&mut self, enable: bool) -> Result<(), SPI::Error> {
self.update_reg(&regs::GpioCon, |data| {
data.set_sync_en(enable);
})
}
pub fn setup_channel(
&mut self, index: u8, in_pos: Input, in_neg: Input
) -> Result<(), SPI::Error> {
self.update_reg(&regs::SetupCon { index }, |data| {
data.set_bipolar(false);
data.set_refbuf_pos(true);
data.set_refbuf_neg(true);
data.set_ainbuf_pos(true);
data.set_ainbuf_neg(true);
data.set_ref_sel(RefSource::External);
})?;
self.update_reg(&regs::FiltCon { index }, |data| {
data.set_enh_filt_en(true);
data.set_enh_filt(PostFilter::F16SPS);
data.set_order(DigitalFilterOrder::Sinc5Sinc1);
// output data rate: 10 Hz
data.set_odr(0b10011);
})?;
self.update_reg(&regs::Channel { index }, |data| {
data.set_setup(index);
data.set_enabled(true);
data.set_a_in_pos(in_pos);
data.set_a_in_neg(in_neg);
})?;
Ok(())
}
pub fn get_calibration(&mut self, index: u8) -> Result<ChannelCalibration, SPI::Error> {
let offset = self.read_reg(&regs::Offset { index })?.offset();
let gain = self.read_reg(&regs::Gain { index })?.gain();
let bipolar = self.read_reg(&regs::SetupCon { index })?.bipolar();
Ok(ChannelCalibration { offset, gain, bipolar })
}
pub fn start_continuous_conversion(&mut self) -> Result<(), SPI::Error> {
let mut adc_mode = <regs::AdcMode as Register>::Data::empty();
adc_mode.set_ref_en(true);
adc_mode.set_mode(Mode::ContinuousConversion);
self.write_reg(&regs::AdcMode, &mut adc_mode)?;
Ok(())
}
pub fn get_postfilter(&mut self, index: u8) -> Result<Option<PostFilter>, SPI::Error> {
self.read_reg(&regs::FiltCon { index })
.map(|data| {
if data.enh_filt_en() {
Some(data.enh_filt())
} else {
None
}
})
}
pub fn set_postfilter(&mut self, index: u8, filter: Option<PostFilter>) -> Result<(), SPI::Error> {
self.update_reg(&regs::FiltCon { index }, |data| {
match filter {
None => data.set_enh_filt_en(false),
Some(filter) => {
data.set_enh_filt_en(true);
data.set_enh_filt(filter);
}
}
})
}
/// Returns the channel the data is from
pub fn data_ready(&mut self) -> Result<Option<u8>, SPI::Error> {
self.read_reg(&regs::Status)
.map(|status| {
if status.ready() {
Some(status.channel())
} else {
None
}
})
}
/// Get data
pub fn read_data(&mut self) -> Result<u32, SPI::Error> {
self.read_reg(&regs::Data)
.map(|data| data.data())
}
fn read_reg<R: regs::Register>(&mut self, reg: &R) -> Result<R::Data, SPI::Error> {
let mut reg_data = R::Data::empty();
let address = 0x40 | reg.address();
let mut checksum = Checksum::new(self.checksum_mode);
checksum.feed(&[address]);
let checksum_out = checksum.result();
loop {
let checksum_in = self.transfer(address, reg_data.as_mut(), checksum_out)?;
checksum.feed(&reg_data);
let checksum_expected = checksum.result();
if checksum_expected == checksum_in {
break;
}
// Retry
warn!("read_reg {:02X}: checksum error: {:?}!={:?}, retrying", reg.address(), checksum_expected, checksum_in);
}
Ok(reg_data)
}
fn write_reg<R: regs::Register>(&mut self, reg: &R, reg_data: &mut R::Data) -> Result<(), SPI::Error> {
loop {
let address = reg.address();
let mut checksum = Checksum::new(match self.checksum_mode {
ChecksumMode::Off => ChecksumMode::Off,
// write checksums are always crc
ChecksumMode::Xor => ChecksumMode::Crc,
ChecksumMode::Crc => ChecksumMode::Crc,
});
checksum.feed(&[address]);
checksum.feed(&reg_data);
let checksum_out = checksum.result();
let mut data = reg_data.clone();
self.transfer(address, data.as_mut(), checksum_out)?;
// Verification
let readback_data = self.read_reg(reg)?;
if *readback_data == **reg_data {
return Ok(());
}
warn!("write_reg {:02X}: readback error, {:?}!={:?}, retrying", address, &*readback_data, &**reg_data);
}
}
fn update_reg<R, F, A>(&mut self, reg: &R, f: F) -> Result<A, SPI::Error>
where
R: regs::Register,
F: FnOnce(&mut R::Data) -> A,
{
let mut reg_data = self.read_reg(reg)?;
let result = f(&mut reg_data);
self.write_reg(reg, &mut reg_data)?;
Ok(result)
}
pub fn reset(&mut self) -> Result<(), SPI::Error> {
let mut buf = [0xFFu8; 8];
let _ = self.nss.set_low();
let result = self.spi.transfer(&mut buf);
let _ = self.nss.set_high();
result?;
Ok(())
}
fn transfer<'w>(&mut self, addr: u8, reg_data: &'w mut [u8], checksum: Option<u8>) -> Result<Option<u8>, SPI::Error> {
let mut addr_buf = [addr];
let _ = self.nss.set_low();
let result = match self.spi.transfer(&mut addr_buf) {
Ok(_) => self.spi.transfer(reg_data),
Err(e) => Err(e),
};
let result = match (result, checksum) {
(Ok(_), None) =>
Ok(None),
(Ok(_), Some(checksum_out)) => {
let mut checksum_buf = [checksum_out; 1];
match self.spi.transfer(&mut checksum_buf) {
Ok(_) => Ok(Some(checksum_buf[0])),
Err(e) => Err(e),
}
}
(Err(e), _) =>
Err(e),
};
let _ = self.nss.set_high();
result
}
}
#[derive(Debug, Clone)]
pub struct ChannelCalibration {
offset: u32,
gain: u32,
bipolar: bool,
}
impl ChannelCalibration {
pub fn convert_data(&self, data: u32) -> ElectricPotential {
let data = if self.bipolar {
(data as i32 - 0x80_0000) as f64
} else {
data as f64 / 2.0
};
let data = data / (self.gain as f64 / (0x40_0000 as f64));
let data = data + (self.offset as i32 - 0x80_0000) as f64;
let data = data / (2 << 23) as f64;
const V_REF: f64 = 3.3;
ElectricPotential::new::<volt>(data * V_REF / 0.75)
}
}

60
src/thermostat/ad7172/checksum.rs Normal file
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@ -0,0 +1,60 @@
#[derive(Clone, Copy, PartialEq)]
#[repr(u8)]
pub enum ChecksumMode {
Off = 0b00,
/// Seems much less reliable than `Crc`
Xor = 0b01,
Crc = 0b10,
}
impl From<u8> for ChecksumMode {
fn from(x: u8) -> Self {
match x {
0 => ChecksumMode::Off,
1 => ChecksumMode::Xor,
_ => ChecksumMode::Crc,
}
}
}
pub struct Checksum {
mode: ChecksumMode,
state: u8,
}
impl Checksum {
pub fn new(mode: ChecksumMode) -> Self {
Checksum { mode, state: 0 }
}
fn feed_byte(&mut self, input: u8) {
match self.mode {
ChecksumMode::Off => {},
ChecksumMode::Xor => self.state ^= input,
ChecksumMode::Crc => {
for i in 0..8 {
let input_mask = 0x80 >> i;
self.state = (self.state << 1) ^
if ((self.state & 0x80) != 0) != ((input & input_mask) != 0) {
0x07 /* x8 + x2 + x + 1 */
} else {
0
};
}
}
}
}
pub fn feed(&mut self, input: &[u8]) {
for &b in input {
self.feed_byte(b);
}
}
pub fn result(&self) -> Option<u8> {
match self.mode {
ChecksumMode::Off => None,
_ => Some(self.state)
}
}
}

221
src/thermostat/ad7172/mod.rs Normal file
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@ -0,0 +1,221 @@
use core::fmt;
use num_traits::float::Float;
use serde::{Serialize, Deserialize};
use fugit::MegahertzU32;
use stm32f4xx_hal::spi;
pub mod regs;
mod checksum;
pub use checksum::ChecksumMode;
mod adc;
pub use adc::*;
/// SPI Mode 3
pub const SPI_MODE: spi::Mode = spi::Mode {
polarity: spi::Polarity::IdleHigh,
phase: spi::Phase::CaptureOnSecondTransition,
};
/// 2 MHz
pub const SPI_CLOCK_MHZ: MegahertzU32 = MegahertzU32::from_raw(2);
pub const MAX_VALUE: u32 = 0xFF_FFFF;
#[derive(Clone, Copy, Debug)]
#[repr(u8)]
pub enum Mode {
ContinuousConversion = 0b000,
SingleConversion = 0b001,
Standby = 0b010,
PowerDown = 0b011,
InternalOffsetCalibration = 0b100,
Invalid,
SystemOffsetCalibration = 0b110,
SystemGainCalibration = 0b111,
}
impl From<u8> for Mode {
fn from(x: u8) -> Self {
use Mode::*;
match x {
0b000 => ContinuousConversion,
0b001 => SingleConversion,
0b010 => Standby,
0b011 => PowerDown,
0b100 => InternalOffsetCalibration,
0b110 => SystemOffsetCalibration,
0b111 => SystemGainCalibration,
_ => Invalid,
}
}
}
#[derive(Clone, Copy, Debug)]
#[repr(u8)]
pub enum Input {
Ain0 = 0,
Ain1 = 1,
Ain2 = 2,
Ain3 = 3,
Ain4 = 4,
TemperaturePos = 17,
TemperatureNeg = 18,
AnalogSupplyPos = 19,
AnalogSupplyNeg = 20,
RefPos = 21,
RefNeg = 22,
Invalid = 0b11111,
}
impl From<u8> for Input {
fn from(x: u8) -> Self {
match x {
0 => Input::Ain0,
1 => Input::Ain1,
2 => Input::Ain2,
3 => Input::Ain3,
4 => Input::Ain4,
17 => Input::TemperaturePos,
18 => Input::TemperatureNeg,
19 => Input::AnalogSupplyPos,
20 => Input::AnalogSupplyNeg,
21 => Input::RefPos,
22 => Input::RefNeg,
_ => Input::Invalid,
}
}
}
impl fmt::Display for Input {
fn fmt(&self, fmt: &mut fmt::Formatter) -> Result<(), fmt::Error> {
use Input::*;
match self {
Ain0 => "ain0",
Ain1 => "ain1",
Ain2 => "ain2",
Ain3 => "ain3",
Ain4 => "ain4",
TemperaturePos => "temperature+",
TemperatureNeg => "temperature-",
AnalogSupplyPos => "analogsupply+",
AnalogSupplyNeg => "analogsupply-",
RefPos => "ref+",
RefNeg => "ref-",
_ => "<INVALID>",
}.fmt(fmt)
}
}
/// Reference source for ADC conversion
#[repr(u8)]
pub enum RefSource {
/// External reference
External = 0b00,
/// Internal 2.5V reference
Internal = 0b10,
/// AVDD1 − AVSS
Avdd1MinusAvss = 0b11,
Invalid = 0b01,
}
impl From<u8> for RefSource {
fn from(x: u8) -> Self {
match x {
0 => RefSource::External,
1 => RefSource::Internal,
2 => RefSource::Avdd1MinusAvss,
_ => RefSource::Invalid,
}
}
}
impl fmt::Display for RefSource {
fn fmt(&self, fmt: &mut fmt::Formatter) -> Result<(), fmt::Error> {
use RefSource::*;
match self {
External => "external",
Internal => "internal",
Avdd1MinusAvss => "avdd1-avss",
_ => "<INVALID>",
}.fmt(fmt)
}
}
#[derive(Clone, Copy, Debug, PartialEq, Serialize, Deserialize)]
#[repr(u8)]
pub enum PostFilter {
/// 27 SPS, 47 dB rejection, 36.7 ms settling
F27SPS = 0b010,
/// 21.25 SPS, 62 dB rejection, 40 ms settling
F21SPS = 0b011,
/// 20 SPS, 86 dB rejection, 50 ms settling
F20SPS = 0b101,
/// 16.67 SPS, 92 dB rejection, 60 ms settling
F16SPS = 0b110,
Invalid = 0b111,
}
impl PostFilter {
pub const VALID_VALUES: &'static [Self] = &[
PostFilter::F27SPS,
PostFilter::F21SPS,
PostFilter::F20SPS,
PostFilter::F16SPS,
];
pub fn closest(rate: f32) -> Option<Self> {
let mut best: Option<(f32, Self)> = None;
for value in Self::VALID_VALUES {
let error = (rate - value.output_rate().unwrap()).abs();
let better = best
.map(|(best_error, _)| error < best_error)
.unwrap_or(true);
if better {
best = Some((error, *value));
}
}
best.map(|(_, best)| best)
}
/// Samples per Second
pub fn output_rate(&self) -> Option<f32> {
match self {
PostFilter::F27SPS => Some(27.0),
PostFilter::F21SPS => Some(21.25),
PostFilter::F20SPS => Some(20.0),
PostFilter::F16SPS => Some(16.67),
PostFilter::Invalid => None,
}
}
}
impl From<u8> for PostFilter {
fn from(x: u8) -> Self {
match x {
0b010 => PostFilter::F27SPS,
0b011 => PostFilter::F21SPS,
0b101 => PostFilter::F20SPS,
0b110 => PostFilter::F16SPS,
_ => PostFilter::Invalid,
}
}
}
#[repr(u8)]
pub enum DigitalFilterOrder {
Sinc5Sinc1 = 0b00,
Sinc3 = 0b11,
Invalid = 0b10,
}
impl From<u8> for DigitalFilterOrder {
fn from(x: u8) -> Self {
match x {
0b00 => DigitalFilterOrder::Sinc5Sinc1,
0b11 => DigitalFilterOrder::Sinc3,
_ => DigitalFilterOrder::Invalid,
}
}
}

267
src/thermostat/ad7172/regs.rs Normal file
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@ -0,0 +1,267 @@
use core::ops::{Deref, DerefMut};
use byteorder::{BigEndian, ByteOrder};
use bit_field::BitField;
use super::*;
pub trait Register {
type Data: RegisterData;
fn address(&self) -> u8;
}
pub trait RegisterData: Clone + Deref<Target=[u8]> + DerefMut {
fn empty() -> Self;
}
macro_rules! def_reg {
($Reg: ident, $reg: ident, $addr: expr, $size: expr) => {
/// AD7172 register
pub struct $Reg;
impl Register for $Reg {
/// Register contents
type Data = $reg::Data;
/// Register address
fn address(&self) -> u8 {
$addr
}
}
mod $reg {
/// Register contents
#[derive(Clone)]
pub struct Data(pub [u8; $size]);
impl super::RegisterData for Data {
/// Generate zeroed register contents
fn empty() -> Self {
Data([0; $size])
}
}
impl core::ops::Deref for Data {
type Target = [u8];
fn deref(&self) -> &[u8] {
&self.0
}
}
impl core::ops::DerefMut for Data {
fn deref_mut(&mut self) -> &mut [u8] {
&mut self.0
}
}
}
};
($Reg: ident, u8, $reg: ident, $addr: expr, $size: expr) => {
pub struct $Reg { pub index: u8, }
impl Register for $Reg {
type Data = $reg::Data;
fn address(&self) -> u8 {
$addr + self.index
}
}
mod $reg {
#[derive(Clone)]
pub struct Data(pub [u8; $size]);
impl super::RegisterData for Data {
fn empty() -> Self {
Data([0; $size])
}
}
impl core::ops::Deref for Data {
type Target = [u8];
fn deref(&self) -> &[u8] {
&self.0
}
}
impl core::ops::DerefMut for Data {
fn deref_mut(&mut self) -> &mut [u8] {
&mut self.0
}
}
}
}
}
macro_rules! reg_bit {
($getter: ident, $byte: expr, $bit: expr, $doc: expr) => {
#[allow(unused)]
#[doc = $doc]
pub fn $getter(&self) -> bool {
self.0[$byte].get_bit($bit)
}
};
($getter: ident, $setter: ident, $byte: expr, $bit: expr, $doc: expr) => {
#[allow(unused)]
#[doc = $doc]
pub fn $getter(&self) -> bool {
self.0[$byte].get_bit($bit)
}
#[allow(unused)]
#[doc = $doc]
pub fn $setter(&mut self, value: bool) {
self.0[$byte].set_bit($bit, value);
}
};
}
macro_rules! reg_bits {
($getter: ident, $byte: expr, $bits: expr, $doc: expr) => {
#[allow(unused)]
#[doc = $doc]
pub fn $getter(&self) -> u8 {
self.0[$byte].get_bits($bits)
}
};
($getter: ident, $setter: ident, $byte: expr, $bits: expr, $doc: expr) => {
#[allow(unused)]
#[doc = $doc]
pub fn $getter(&self) -> u8 {
self.0[$byte].get_bits($bits)
}
#[allow(unused)]
#[doc = $doc]
pub fn $setter(&mut self, value: u8) {
self.0[$byte].set_bits($bits, value);
}
};
($getter: ident, $byte: expr, $bits: expr, $ty: ty, $doc: expr) => {
#[allow(unused)]
#[doc = $doc]
pub fn $getter(&self) -> $ty {
self.0[$byte].get_bits($bits) as $ty
}
};
($getter: ident, $setter: ident, $byte: expr, $bits: expr, $ty: ty, $doc: expr) => {
#[allow(unused)]
#[doc = $doc]
pub fn $getter(&self) -> $ty {
self.0[$byte].get_bits($bits).into()
}
#[allow(unused)]
#[doc = $doc]
pub fn $setter(&mut self, value: $ty) {
self.0[$byte].set_bits($bits, value as u8);
}
};
}
def_reg!(Status, status, 0x00, 1);
impl status::Data {
/// Is there new data to read?
pub fn ready(&self) -> bool {
! self.not_ready()
}
reg_bit!(not_ready, 0, 7, "No data ready indicator");
reg_bits!(channel, 0, 0..=1, "Channel for which data is ready");
reg_bit!(adc_error, 0, 6, "ADC error");
reg_bit!(crc_error, 0, 5, "SPI CRC error");
reg_bit!(reg_error, 0, 4, "Register error");
}
def_reg!(AdcMode, adc_mode, 0x01, 2);
impl adc_mode::Data {
reg_bits!(delay, set_delay, 0, 0..=2, "Delay after channel switch");
reg_bit!(sing_cyc, set_sing_cyc, 0, 5, "Can only used with single channel");
reg_bit!(hide_delay, set_hide_delay, 0, 6, "Hide delay");
reg_bit!(ref_en, set_ref_en, 0, 7, "Enable internal reference, output buffered 2.5 V to REFOUT");
reg_bits!(clockset, set_clocksel, 1, 2..=3, "Clock source");
reg_bits!(mode, set_mode, 1, 4..=6, Mode, "Operating mode");
}
def_reg!(IfMode, if_mode, 0x02, 2);
impl if_mode::Data {
reg_bits!(crc, set_crc, 1, 2..=3, ChecksumMode, "SPI checksum mode");
}
def_reg!(Data, data, 0x04, 3);
impl data::Data {
pub fn data(&self) -> u32 {
(u32::from(self.0[0]) << 16) |
(u32::from(self.0[1]) << 8) |
u32::from(self.0[2])
}
}
def_reg!(GpioCon, gpio_con, 0x06, 2);
impl gpio_con::Data {
reg_bit!(sync_en, set_sync_en, 0, 3, "Enables the SYNC/ERROR pin as a sync input");
}
def_reg!(Id, id, 0x07, 2);
impl id::Data {
pub fn id(&self) -> u16 {
BigEndian::read_u16(&self.0)
}
}
def_reg!(Channel, u8, channel, 0x10, 2);
impl channel::Data {
reg_bit!(enabled, set_enabled, 0, 7, "Channel enabled");
reg_bits!(setup, set_setup, 0, 4..=5, "Setup number");
/// Which input is connected to positive input of this channel
#[allow(unused)]
pub fn a_in_pos(&self) -> Input {
((self.0[0].get_bits(0..=1) << 3) |
self.0[1].get_bits(5..=7)).into()
}
/// Set which input is connected to positive input of this channel
#[allow(unused)]
pub fn set_a_in_pos(&mut self, value: Input) {
let value = value as u8;
self.0[0].set_bits(0..=1, value >> 3);
self.0[1].set_bits(5..=7, value & 0x7);
}
reg_bits!(a_in_neg, set_a_in_neg, 1, 0..=4, Input,
"Which input is connected to negative input of this channel");
}
def_reg!(SetupCon, u8, setup_con, 0x20, 2);
impl setup_con::Data {
reg_bit!(bipolar, set_bipolar, 0, 4, "Unipolar (`false`) or bipolar (`true`) coded output");
reg_bit!(refbuf_pos, set_refbuf_pos, 0, 3, "Enable REF+ input buffer");
reg_bit!(refbuf_neg, set_refbuf_neg, 0, 2, "Enable REF- input buffer");
reg_bit!(ainbuf_pos, set_ainbuf_pos, 0, 1, "Enable AIN+ input buffer");
reg_bit!(ainbuf_neg, set_ainbuf_neg, 0, 0, "Enable AIN- input buffer");
reg_bit!(burnout_en, 1, 7, "enables a 10 µA current source on the positive analog input selected and a 10 µA current sink on the negative analog input selected");
reg_bits!(ref_sel, set_ref_sel, 1, 4..=5, RefSource, "Select reference source for conversion");
}
def_reg!(FiltCon, u8, filt_con, 0x28, 2);
impl filt_con::Data {
reg_bit!(sinc3_map, 0, 7, "If set, mapping of filter register changes to directly program the decimation rate of the sinc3 filter");
reg_bit!(enh_filt_en, set_enh_filt_en, 0, 3, "Enable postfilters for enhanced 50Hz and 60Hz rejection");
reg_bits!(enh_filt, set_enh_filt, 0, 0..=2, PostFilter, "Select postfilters for enhanced 50Hz and 60Hz rejection");
reg_bits!(order, set_order, 1, 5..=6, DigitalFilterOrder, "order of the digital filter that processes the modulator data");
reg_bits!(odr, set_odr, 1, 0..=4, "Output data rate");
}
def_reg!(Offset, u8, offset, 0x30, 3);
impl offset::Data {
#[allow(unused)]
pub fn offset(&self) -> u32 {
(u32::from(self.0[0]) << 16) |
(u32::from(self.0[1]) << 8) |
u32::from(self.0[2])
}
#[allow(unused)]
pub fn set_offset(&mut self, value: u32) {
self.0[0] = (value >> 16) as u8;
self.0[1] = (value >> 8) as u8;
self.0[2] = value as u8;
}
}
def_reg!(Gain, u8, gain, 0x38, 3);
impl gain::Data {
#[allow(unused)]
pub fn gain(&self) -> u32 {
(u32::from(self.0[0]) << 16) |
(u32::from(self.0[1]) << 8) |
u32::from(self.0[2])
}
#[allow(unused)]
pub fn set_gain(&mut self, value: u32) {
self.0[0] = (value >> 16) as u8;
self.0[1] = (value >> 8) as u8;
self.0[2] = value as u8;
}
}

1
src/thermostat/mod.rs
View File

@ -1,3 +1,4 @@
pub mod ad5680;
pub mod max1968;
pub mod thermostat;
pub mod ad7172;