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Extended ADC library
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- MAX116xx-10bit ADC library extended significantly
- Added even more examples with wakeup delay as well
This commit is contained in:
Robin Müller
2021-12-14 00:40:22 +01:00
committed by Robin Mueller
parent 850bd08eae
commit 403407547d
3 changed files with 184 additions and 83 deletions
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198
examples/max11619-adc.rs
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@ -1,13 +1,13 @@
//! MAX11619 ADC example applikcation
#![no_main]
#![no_std]
use core::panic;
use cortex_m_rt::entry;
use embedded_hal::spi;
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},
@ -16,14 +16,15 @@ use va108xx_hal::{
timer::{default_ms_irq_handler, set_up_ms_timer, Delay},
};
use vorago_reb1::max11619::{
max11619_externally_clocked, max11619_internally_clocked, EocPin, AN2_CHANNEL,
POTENTIOMETER_CHANNEL,
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)]
@ -31,9 +32,10 @@ pub enum ReadMode {
Single,
Multiple,
MultipleNToHighest,
AverageN,
}
const EXAMPLE_MODE: ExampleMode = ExampleMode::NotUsingEoc;
const EXAMPLE_MODE: ExampleMode = ExampleMode::UsingEoc;
const READ_MODE: ReadMode = ReadMode::Multiple;
#[entry]
@ -89,6 +91,10 @@ fn main() -> ! {
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);
}
}
}
@ -97,9 +103,17 @@ 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(spi)
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 {
@ -108,50 +122,36 @@ fn spi_example_externally_clocked(spi: SpiBase<SPIB>, mut delay: Delay) -> ! {
match READ_MODE {
ReadMode::Single => {
rprintln!("Reading single potentiometer channel");
let pot_val = match adc.read_single_channel(&mut cmd_buf, POTENTIOMETER_CHANNEL) {
Ok(pot_val) => pot_val,
_ => {
panic!("Creating externally clocked MAX11619 ADC failed");
}
};
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];
match adc.read_multiple_channels_0_to_n(
adc.read_multiple_channels_0_to_n(
&mut cmd_buf,
&mut res_buf.iter_mut(),
POTENTIOMETER_CHANNEL,
) {
Ok(_) => {
rprintln!("Multi channel read from 0 to 3:");
rprintln!("\tAN0 value: {}", res_buf[0]);
rprintln!("\tAN1 value: {}", res_buf[1]);
rprintln!("\tAN2 value: {}", res_buf[2]);
rprintln!("\tAN3 / Potentiometer value: {}", res_buf[3]);
}
_ => {
panic!("Multi-Channel read failed");
}
}
)
.expect("Multi-Channel read failed");
print_res_buf(&res_buf);
}
ReadMode::MultipleNToHighest => {
let mut res_buf: [u16; 2] = [0; 2];
match adc.read_multiple_channels_n_to_highest(
adc.read_multiple_channels_n_to_highest(
&mut cmd_buf,
&mut res_buf.iter_mut(),
AN2_CHANNEL,
) {
Ok(_) => {
rprintln!("Multi channel read from 2 to 3:");
rprintln!("\tAN2 value: {}", res_buf[0]);
rprintln!("\tAN3 / Potentiometer value: {}", res_buf[1]);
}
_ => {
panic!("Multi-Channel read failed");
}
}
)
.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;
@ -159,22 +159,122 @@ fn spi_example_externally_clocked(spi: SpiBase<SPIB>, mut delay: Delay) -> ! {
}
}
fn spi_example_internally_clocked(spi: SpiBase<SPIB>, mut delay: Delay, mut eoc_pin: EocPin) -> ! {
let mut adc = max11619_internally_clocked(spi).expect("Creaintg MAX116xx device failed");
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 adc.request_single_channel(POTENTIOMETER_CHANNEL) {
Ok(_) => (),
_ => panic!("Requesting single channel value failed"),
};
let pot_val = match nb::block!(adc.get_single_channel(&mut eoc_pin)) {
Ok(pot_val) => pot_val,
_ => panic!("Reading single channel value failed"),
};
rprintln!("\tPotentiometer value: {}", pot_val);
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]);
}