296 lines
10 KiB
Rust
296 lines
10 KiB
Rust
//! MAX11619 ADC example applikcation
|
|
#![no_main]
|
|
#![no_std]
|
|
|
|
use cortex_m_rt::entry;
|
|
use embedded_hal::{blocking::delay::DelayUs, spi};
|
|
use max116xx_10bit::VoltageRefMode;
|
|
use max116xx_10bit::{AveragingConversions, AveragingResults};
|
|
use panic_rtt_target as _;
|
|
use rtt_target::{rprintln, rtt_init_print};
|
|
use va108xx_hal::timer::CountDownTimer;
|
|
use va108xx_hal::{
|
|
gpio::PinsA,
|
|
pac::{self, interrupt, SPIB},
|
|
prelude::*,
|
|
spi::{Spi, SpiBase, SpiConfig, TransferConfig},
|
|
timer::{default_ms_irq_handler, set_up_ms_timer, Delay, IrqCfg},
|
|
utility::{port_mux, Funsel, PortSel},
|
|
};
|
|
use vorago_reb1::max11619::{
|
|
max11619_externally_clocked_no_wakeup, max11619_externally_clocked_with_wakeup,
|
|
max11619_internally_clocked, EocPin, AN2_CHANNEL, POTENTIOMETER_CHANNEL,
|
|
};
|
|
|
|
#[derive(Debug, PartialEq, Copy, Clone)]
|
|
pub enum ExampleMode {
|
|
UsingEoc,
|
|
NotUsingEoc,
|
|
NotUsingEocWithDelay,
|
|
}
|
|
|
|
#[derive(Debug, PartialEq, Copy, Clone)]
|
|
pub enum ReadMode {
|
|
Single,
|
|
Multiple,
|
|
MultipleNToHighest,
|
|
AverageN,
|
|
}
|
|
|
|
#[derive(Debug, PartialEq, Copy, Clone)]
|
|
pub enum MuxMode {
|
|
None,
|
|
PortB19to17,
|
|
}
|
|
|
|
const EXAMPLE_MODE: ExampleMode = ExampleMode::NotUsingEoc;
|
|
const READ_MODE: ReadMode = ReadMode::Multiple;
|
|
const MUX_MODE: MuxMode = MuxMode::None;
|
|
|
|
#[entry]
|
|
fn main() -> ! {
|
|
rtt_init_print!();
|
|
rprintln!("-- Vorago ADC Example --");
|
|
|
|
let mut dp = pac::Peripherals::take().unwrap();
|
|
let tim0 = set_up_ms_timer(
|
|
IrqCfg::new(pac::Interrupt::OC0, true, true),
|
|
&mut dp.SYSCONFIG,
|
|
Some(&mut dp.IRQSEL),
|
|
50.mhz(),
|
|
dp.TIM0,
|
|
);
|
|
let delay = Delay::new(tim0);
|
|
unsafe {
|
|
cortex_m::peripheral::NVIC::unmask(pac::Interrupt::OC0);
|
|
}
|
|
|
|
let pinsa = PinsA::new(&mut dp.SYSCONFIG, None, dp.PORTA);
|
|
let spi_cfg = SpiConfig::default();
|
|
let (sck, mosi, miso) = (
|
|
pinsa.pa20.into_funsel_2(),
|
|
pinsa.pa19.into_funsel_2(),
|
|
pinsa.pa18.into_funsel_2(),
|
|
);
|
|
|
|
if MUX_MODE == MuxMode::PortB19to17 {
|
|
port_mux(&mut dp.IOCONFIG, PortSel::PortB, 19, Funsel::Funsel1).ok();
|
|
port_mux(&mut dp.IOCONFIG, PortSel::PortB, 18, Funsel::Funsel1).ok();
|
|
port_mux(&mut dp.IOCONFIG, PortSel::PortB, 17, Funsel::Funsel1).ok();
|
|
port_mux(&mut dp.IOCONFIG, PortSel::PortB, 16, Funsel::Funsel1).ok();
|
|
}
|
|
// Set the accelerometer chip select low in case the board slot is populated
|
|
let mut accel_cs = pinsa.pa16.into_push_pull_output();
|
|
accel_cs
|
|
.set_high()
|
|
.expect("Setting accelerometer chip select high failed");
|
|
|
|
let transfer_cfg = TransferConfig::new(
|
|
3.mhz(),
|
|
spi::MODE_0,
|
|
Some(pinsa.pa17.into_funsel_2()),
|
|
true,
|
|
false,
|
|
);
|
|
let spi = Spi::spib(
|
|
dp.SPIB,
|
|
(sck, miso, mosi),
|
|
50.mhz(),
|
|
spi_cfg,
|
|
Some(&mut dp.SYSCONFIG),
|
|
Some(&transfer_cfg.downgrade()),
|
|
)
|
|
.downgrade();
|
|
match EXAMPLE_MODE {
|
|
ExampleMode::NotUsingEoc => spi_example_externally_clocked(spi, delay),
|
|
ExampleMode::UsingEoc => {
|
|
spi_example_internally_clocked(spi, delay, pinsa.pa14.into_floating_input());
|
|
}
|
|
ExampleMode::NotUsingEocWithDelay => {
|
|
let delay_us = CountDownTimer::new(&mut dp.SYSCONFIG, 50.mhz(), dp.TIM2);
|
|
spi_example_externally_clocked_with_delay(spi, delay, delay_us);
|
|
}
|
|
}
|
|
}
|
|
|
|
#[interrupt]
|
|
fn OC0() {
|
|
default_ms_irq_handler();
|
|
}
|
|
|
|
/// Use the SPI clock as the conversion clock
|
|
fn spi_example_externally_clocked(spi: SpiBase<SPIB>, mut delay: Delay) -> ! {
|
|
let mut adc = max11619_externally_clocked_no_wakeup(spi)
|
|
.expect("Creating externally clocked MAX11619 device failed");
|
|
if READ_MODE == ReadMode::AverageN {
|
|
adc.averaging(
|
|
AveragingConversions::FourConversions,
|
|
AveragingResults::FourResults,
|
|
)
|
|
.expect("Error setting up averaging register");
|
|
}
|
|
let mut cmd_buf: [u8; 32] = [0; 32];
|
|
let mut counter = 0;
|
|
loop {
|
|
rprintln!("-- Measurement {} --", counter);
|
|
|
|
match READ_MODE {
|
|
ReadMode::Single => {
|
|
rprintln!("Reading single potentiometer channel");
|
|
let pot_val = adc
|
|
.read_single_channel(&mut cmd_buf, POTENTIOMETER_CHANNEL)
|
|
.expect("Creating externally clocked MAX11619 ADC failed");
|
|
rprintln!("Single channel read:");
|
|
rprintln!("\tPotentiometer value: {}", pot_val);
|
|
}
|
|
ReadMode::Multiple => {
|
|
let mut res_buf: [u16; 4] = [0; 4];
|
|
adc.read_multiple_channels_0_to_n(
|
|
&mut cmd_buf,
|
|
&mut res_buf.iter_mut(),
|
|
POTENTIOMETER_CHANNEL,
|
|
)
|
|
.expect("Multi-Channel read failed");
|
|
print_res_buf(&res_buf);
|
|
}
|
|
ReadMode::MultipleNToHighest => {
|
|
let mut res_buf: [u16; 2] = [0; 2];
|
|
adc.read_multiple_channels_n_to_highest(
|
|
&mut cmd_buf,
|
|
&mut res_buf.iter_mut(),
|
|
AN2_CHANNEL,
|
|
)
|
|
.expect("Multi-Channel read failed");
|
|
rprintln!("Multi channel read from 2 to 3:");
|
|
rprintln!("\tAN2 value: {}", res_buf[0]);
|
|
rprintln!("\tAN3 / Potentiometer value: {}", res_buf[1]);
|
|
}
|
|
ReadMode::AverageN => {
|
|
rprintln!("Scanning and averaging not possible for externally clocked mode");
|
|
}
|
|
}
|
|
counter += 1;
|
|
delay.delay_ms(500);
|
|
}
|
|
}
|
|
|
|
fn spi_example_externally_clocked_with_delay(
|
|
spi: SpiBase<SPIB>,
|
|
mut delay: Delay,
|
|
mut delay_us: impl DelayUs<u8>,
|
|
) -> ! {
|
|
let mut adc =
|
|
max11619_externally_clocked_with_wakeup(spi).expect("Creating MAX116xx device failed");
|
|
let mut cmd_buf: [u8; 32] = [0; 32];
|
|
let mut counter = 0;
|
|
loop {
|
|
rprintln!("-- Measurement {} --", counter);
|
|
|
|
match READ_MODE {
|
|
ReadMode::Single => {
|
|
rprintln!("Reading single potentiometer channel");
|
|
let pot_val = adc
|
|
.read_single_channel(&mut cmd_buf, POTENTIOMETER_CHANNEL, &mut delay_us)
|
|
.expect("Creating externally clocked MAX11619 ADC failed");
|
|
rprintln!("Single channel read:");
|
|
rprintln!("\tPotentiometer value: {}", pot_val);
|
|
}
|
|
ReadMode::Multiple => {
|
|
let mut res_buf: [u16; 4] = [0; 4];
|
|
adc.read_multiple_channels_0_to_n(
|
|
&mut cmd_buf,
|
|
&mut res_buf.iter_mut(),
|
|
POTENTIOMETER_CHANNEL,
|
|
&mut delay_us,
|
|
)
|
|
.expect("Multi-Channel read failed");
|
|
print_res_buf(&res_buf);
|
|
}
|
|
ReadMode::MultipleNToHighest => {
|
|
let mut res_buf: [u16; 2] = [0; 2];
|
|
adc.read_multiple_channels_n_to_highest(
|
|
&mut cmd_buf,
|
|
&mut res_buf.iter_mut(),
|
|
AN2_CHANNEL,
|
|
&mut delay_us,
|
|
)
|
|
.expect("Multi-Channel read failed");
|
|
rprintln!("Multi channel read from 2 to 3:");
|
|
rprintln!("\tAN2 value: {}", res_buf[0]);
|
|
rprintln!("\tAN3 / Potentiometer value: {}", res_buf[1]);
|
|
}
|
|
ReadMode::AverageN => {
|
|
rprintln!("Scanning and averaging not possible for externally clocked mode");
|
|
}
|
|
}
|
|
counter += 1;
|
|
delay.delay_ms(500);
|
|
}
|
|
}
|
|
|
|
/// This function uses the EOC pin to determine whether the conversion finished
|
|
fn spi_example_internally_clocked(spi: SpiBase<SPIB>, mut delay: Delay, eoc_pin: EocPin) -> ! {
|
|
let mut adc = max11619_internally_clocked(
|
|
spi,
|
|
eoc_pin,
|
|
VoltageRefMode::ExternalSingleEndedNoWakeupDelay,
|
|
)
|
|
.expect("Creating MAX116xx device failed");
|
|
let mut counter = 0;
|
|
loop {
|
|
rprintln!("-- Measurement {} --", counter);
|
|
|
|
match READ_MODE {
|
|
ReadMode::Single => {
|
|
adc.request_single_channel(POTENTIOMETER_CHANNEL)
|
|
.expect("Requesting single channel value failed");
|
|
|
|
let pot_val = nb::block!(adc.get_single_channel())
|
|
.expect("Reading single channel value failed");
|
|
rprintln!("\tPotentiometer value: {}", pot_val);
|
|
}
|
|
ReadMode::Multiple => {
|
|
adc.request_multiple_channels_0_to_n(POTENTIOMETER_CHANNEL)
|
|
.expect("Requesting single channel value failed");
|
|
let mut res_buf: [u16; 4] = [0; 4];
|
|
nb::block!(adc.get_multi_channel(&mut res_buf.iter_mut()))
|
|
.expect("Requesting multiple channel values failed");
|
|
print_res_buf(&res_buf);
|
|
}
|
|
ReadMode::MultipleNToHighest => {
|
|
adc.request_multiple_channels_n_to_highest(AN2_CHANNEL)
|
|
.expect("Requesting single channel value failed");
|
|
let mut res_buf: [u16; 4] = [0; 4];
|
|
nb::block!(adc.get_multi_channel(&mut res_buf.iter_mut()))
|
|
.expect("Requesting multiple channel values failed");
|
|
rprintln!("Multi channel read from 2 to 3:");
|
|
rprintln!("\tAN2 value: {}", res_buf[0]);
|
|
rprintln!("\tAN3 / Potentiometer value: {}", res_buf[1]);
|
|
}
|
|
ReadMode::AverageN => {
|
|
adc.request_channel_n_repeatedly(POTENTIOMETER_CHANNEL)
|
|
.expect("Reading channel multiple times failed");
|
|
let mut res_buf: [u16; 16] = [0; 16];
|
|
nb::block!(adc.get_multi_channel(&mut res_buf.iter_mut()))
|
|
.expect("Requesting multiple channel values failed");
|
|
rprintln!("Reading potentiometer 4 times");
|
|
rprintln!("\tValue 0: {}", res_buf[0]);
|
|
rprintln!("\tValue 1: {}", res_buf[1]);
|
|
rprintln!("\tValue 2: {}", res_buf[2]);
|
|
rprintln!("\tValue 3: {}", res_buf[3]);
|
|
}
|
|
}
|
|
|
|
counter += 1;
|
|
delay.delay_ms(500);
|
|
}
|
|
}
|
|
|
|
fn print_res_buf(buf: &[u16; 4]) {
|
|
rprintln!("Multi channel read from 0 to 3:");
|
|
rprintln!("\tAN0 value: {}", buf[0]);
|
|
rprintln!("\tAN1 value: {}", buf[1]);
|
|
rprintln!("\tAN2 value: {}", buf[2]);
|
|
rprintln!("\tAN3 / Potentiometer value: {}", buf[3]);
|
|
}
|