From fbde5c13ac1ca83d55a7f4834f2f6f7592f8f1ef Mon Sep 17 00:00:00 2001
From: Stephen D <webmaster@scd31.com>
Date: Sun, 24 Nov 2024 11:49:54 -0400
Subject: [PATCH] add bme280 support
---
Cargo.lock | 10 ++++++++++
Cargo.toml | 1 +
src/main.rs | 47 ++++++++++++++++++++++++++++++++++++++++++-----
src/shell.rs | 21 ++++++++++++++++++++-
4 files changed, 73 insertions(+), 6 deletions(-)
diff --git a/Cargo.lock b/Cargo.lock
index b6d03ce..bcfdfd5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -65,6 +65,15 @@ dependencies = [
"wyz",
]
+[[package]]
+name = "bme280"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32c139eaf2284d0c91a25f61d84dd326444cace86cb0371f45d71d2d055ba432"
+dependencies = [
+ "embedded-hal 0.2.7",
+]
+
[[package]]
name = "byteorder"
version = "1.5.0"
@@ -76,6 +85,7 @@ name = "cats-mobile-transceiver-mainboard"
version = "0.2.1"
dependencies = [
"arrayvec",
+ "bme280",
"cortex-m",
"cortex-m-rt",
"cortex-m-rtic",
diff --git a/Cargo.toml b/Cargo.toml
index 6412f1d..1891060 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,3 +36,4 @@ num-traits = { version = "0.2.17", default-features = false, features = ["libm"]
rand = { version = "0.8", default-features = false, features = ["small_rng"] }
postcard = "1.0.8"
serde = { version = "1.0.196", default-features = false, features = ["derive"] }
+bme280 = { version = "0.3", default-features = false }
diff --git a/src/main.rs b/src/main.rs
index 1037e27..1a68693 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -24,6 +24,7 @@ mod app {
use core::fmt::Write;
use arrayvec::ArrayString;
+ use bme280::i2c::BME280;
use cortex_m::singleton;
use hal::{
adc::{config::AdcConfig, Adc},
@@ -42,7 +43,12 @@ mod app {
packet::Packet,
whisker::{Gps, NodeInfoBuilder, Route},
};
- use stm32f4xx_hal as hal;
+ use stm32f4xx_hal::{
+ self as hal,
+ i2c::I2c,
+ pac::{I2C1, TIM11},
+ timer::Delay,
+ };
use systick_monotonic::{fugit::Instant, ExtU64, Systick};
use usb_device::prelude::*;
@@ -73,6 +79,8 @@ mod app {
#[monotonic(binds = SysTick, default = true)]
type MyMono = Systick<{ SYS_TICK_FREQ }>;
+ pub type MyBme280 = BME280<I2c<I2C1>, Delay<TIM11, 1000>>;
+
#[local]
struct Local {
green: gpio::Pin<'B', 15, gpio::Output>,
@@ -91,6 +99,7 @@ mod app {
radio: Option<RadioManager<'static>>,
gps: GpsModule,
volt_meter: VoltMeter,
+ bme280: MyBme280,
usb_dev: UsbDevice<'static, UsbBusType>,
shell: Shell,
@@ -191,6 +200,19 @@ mod app {
.with_u8_data();
gps_serial.listen(serial::Event::Rxne);
+ // Set up BME280
+ let scl = gpiob.pb8;
+ let sda = gpiob.pb9;
+ let i2c = I2c::new(
+ dp.I2C1,
+ (scl, sda),
+ hal::i2c::Mode::standard(100.kHz()),
+ &clocks,
+ );
+
+ let mut bme280 = BME280::new_primary(i2c, dp.TIM11.delay_ms(&clocks));
+ let _ = bme280.init();
+
// Setup USB
static mut EP_MEMORY: [u32; 1024] = [0; 1024];
static mut USB_BUS: Option<usb_device::bus::UsbBusAllocator<UsbBusType>> = None;
@@ -258,6 +280,7 @@ mod app {
radio,
gps: GpsModule::new(),
volt_meter,
+ bme280,
usb_dev,
shell,
@@ -292,7 +315,7 @@ mod app {
}
}
- #[task(priority = 2, local = [buf, bootup_time], shared = [red, radio, gps, config, status, volt_meter])]
+ #[task(priority = 2, local = [buf, bootup_time], shared = [red, radio, gps, config, status, volt_meter, bme280])]
fn transmit_position(mut ctx: transmit_position::Context) {
let mut config = ctx.shared.config;
let (black_hole, transmit_period_seconds) =
@@ -331,6 +354,14 @@ mod app {
.to_secs()
.try_into()
.unwrap_or(0);
+ let (temperature, pressure, humidity) = ctx.shared.bme280.lock(|b| match b.measure() {
+ Ok(o) => (o.temperature, o.pressure, o.humidity),
+ Err(_) => {
+ let _ = b.init(); // hail mary attempt
+
+ (0.0, 0.0, 0.0)
+ }
+ });
let mut info_builder = NodeInfoBuilder::default()
.hardware_id(HARDWARE_ID)
@@ -348,7 +379,12 @@ mod app {
.unwrap();
let mut buf: ArrayString<64> = ArrayString::new();
- write!(&mut buf, "{} {} {}", sensors[0], sensors[1], sensors[2]).unwrap();
+ write!(
+ &mut buf,
+ "{} {} {} {} {} {}",
+ sensors[0], sensors[1], sensors[2], temperature, pressure, humidity
+ )
+ .unwrap();
cats.add_comment(&buf).unwrap();
cats.add_route(Route::new(config.max_hops)).unwrap();
@@ -467,17 +503,18 @@ mod app {
}
}
- #[task(binds=OTG_FS, priority = 2, local=[flash], shared=[usb_dev, shell, volt_meter])]
+ #[task(binds=OTG_FS, priority = 2, local=[flash], shared=[usb_dev, shell, volt_meter,bme280])]
fn usb_fs(cx: usb_fs::Context) {
let usb_fs::SharedResources {
mut usb_dev,
mut shell,
mut volt_meter,
+ mut bme280,
} = cx.shared;
(&mut usb_dev, &mut shell).lock(|usb_dev, shell| {
while usb_dev.poll(&mut [shell.ushell.get_serial_mut()]) {
- shell.poll(cx.local.flash, &mut volt_meter);
+ shell.poll(cx.local.flash, &mut volt_meter, &mut bme280);
}
});
}
diff --git a/src/shell.rs b/src/shell.rs
index dc9fab4..1a9c596 100644
--- a/src/shell.rs
+++ b/src/shell.rs
@@ -10,6 +10,7 @@ use usbd_serial::SerialPort;
use ushell::{autocomplete::StaticAutocomplete, history::LRUHistory, Input, ShellError, UShell};
use crate::{
+ app::MyBme280,
config::{BlackHoleSetting, Config, Frequency, GpsSetting, Maybe, MaybeBlackHole},
voltage::VoltMeter,
};
@@ -54,7 +55,12 @@ impl Shell {
Self { ushell, config }
}
- pub fn poll<V: Mutex<T = VoltMeter>>(&mut self, flash: &mut LockedFlash, volt_meter: &mut V) {
+ pub fn poll<V: Mutex<T = VoltMeter>, B: Mutex<T = MyBme280>>(
+ &mut self,
+ flash: &mut LockedFlash,
+ volt_meter: &mut V,
+ bme280: &mut B,
+ ) {
loop {
let ushell = &mut self.ushell;
match ushell.poll() {
@@ -266,6 +272,19 @@ impl Shell {
)
.ok();
}
+ "bme280" => match bme280.lock(|b| b.measure()) {
+ Ok(m) => {
+ write!(
+ ushell,
+ "\r\nTemperature: {} deg C\r\nPressure: {} pascals\r\nHumidity: {}%\r\n",
+ m.temperature, m.pressure, m.humidity
+ ).ok();
+ }
+ Err(e) => {
+ write!(ushell, "Could not communicate with the bme280: {:?}", e)
+ .ok();
+ }
+ },
"help" => {
write!(ushell, "{}", HELP_TEXT).ok();
}
--
GitLab