From 8dff89bfd99140bc7de48bb5de600a2aeb920681 Mon Sep 17 00:00:00 2001 From: shufps Date: Thu, 8 Feb 2024 11:07:30 +0100 Subject: added ADC example running on L0 --- examples/stm32l0/src/bin/adc.rs | 46 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 examples/stm32l0/src/bin/adc.rs (limited to 'examples') diff --git a/examples/stm32l0/src/bin/adc.rs b/examples/stm32l0/src/bin/adc.rs new file mode 100644 index 000000000..93bf5adc6 --- /dev/null +++ b/examples/stm32l0/src/bin/adc.rs @@ -0,0 +1,46 @@ +#![no_std] +#![no_main] + +use defmt::*; +use embassy_stm32::Config; +use embassy_executor::Spawner; +use embassy_stm32::adc::{Adc, SampleTime}; +use embassy_stm32::peripherals::ADC; +use embassy_stm32::{adc, bind_interrupts}; +use embassy_time::{Delay, Timer}; +use {defmt_rtt as _, panic_probe as _}; + +bind_interrupts!(struct Irqs { + ADC1_COMP => adc::InterruptHandler; +}); + +#[embassy_executor::main] +async fn main(_spawner: Spawner) { + // enable HSI because default is MSI but ADC doesn't support + // this as clock source on L0s and uses HSI by default + let mut config = Config::default(); + config.rcc.hsi = true; + let p = embassy_stm32::init(config); + + info!("Hello World!"); + + let mut adc = Adc::new(p.ADC, Irqs, &mut Delay); + adc.set_sample_time(SampleTime::Cycles79_5); + let mut pin = p.PA1; + + let mut vrefint = adc.enable_vref(&mut Delay); + let vrefint_sample = adc.read(&mut vrefint).await; + let convert_to_millivolts = |sample| { + // From https://www.st.com/resource/en/datasheet/stm32l051c6.pdf + // 6.3.3 Embedded internal reference voltage + const VREFINT_MV: u32 = 1224; // mV + + (u32::from(sample) * VREFINT_MV / u32::from(vrefint_sample)) as u16 + }; + + loop { + let v = adc.read(&mut pin).await; + info!("--> {} - {} mV", v, convert_to_millivolts(v)); + Timer::after_millis(100).await; + } +} -- cgit From 158d7dbc8f4714c94cf58e48942543726d717f57 Mon Sep 17 00:00:00 2001 From: shufps Date: Thu, 8 Feb 2024 11:11:13 +0100 Subject: cargo fmt --- examples/stm32l0/src/bin/adc.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'examples') diff --git a/examples/stm32l0/src/bin/adc.rs b/examples/stm32l0/src/bin/adc.rs index 93bf5adc6..f94bf907f 100644 --- a/examples/stm32l0/src/bin/adc.rs +++ b/examples/stm32l0/src/bin/adc.rs @@ -2,10 +2,10 @@ #![no_main] use defmt::*; -use embassy_stm32::Config; use embassy_executor::Spawner; use embassy_stm32::adc::{Adc, SampleTime}; use embassy_stm32::peripherals::ADC; +use embassy_stm32::Config; use embassy_stm32::{adc, bind_interrupts}; use embassy_time::{Delay, Timer}; use {defmt_rtt as _, panic_probe as _}; -- cgit From b2b2abeb333f9bacaa43910d1b75308a3f1c5c4e Mon Sep 17 00:00:00 2001 From: shufps Date: Thu, 8 Feb 2024 11:14:29 +0100 Subject: clippy --- examples/stm32l0/src/bin/adc.rs | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'examples') diff --git a/examples/stm32l0/src/bin/adc.rs b/examples/stm32l0/src/bin/adc.rs index f94bf907f..eee69211c 100644 --- a/examples/stm32l0/src/bin/adc.rs +++ b/examples/stm32l0/src/bin/adc.rs @@ -5,8 +5,7 @@ use defmt::*; use embassy_executor::Spawner; use embassy_stm32::adc::{Adc, SampleTime}; use embassy_stm32::peripherals::ADC; -use embassy_stm32::Config; -use embassy_stm32::{adc, bind_interrupts}; +use embassy_stm32::{adc, bind_interrupts, Config}; use embassy_time::{Delay, Timer}; use {defmt_rtt as _, panic_probe as _}; -- cgit From 34c71b58cf281e7a0d5517a3f3939477dadb5575 Mon Sep 17 00:00:00 2001 From: shufps Date: Thu, 8 Feb 2024 11:28:53 +0100 Subject: made adc example working with default clock configuration and switched in `v1` to PCLK/2 per default --- examples/stm32l0/src/bin/adc.rs | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) (limited to 'examples') diff --git a/examples/stm32l0/src/bin/adc.rs b/examples/stm32l0/src/bin/adc.rs index eee69211c..adeaa208a 100644 --- a/examples/stm32l0/src/bin/adc.rs +++ b/examples/stm32l0/src/bin/adc.rs @@ -5,7 +5,7 @@ use defmt::*; use embassy_executor::Spawner; use embassy_stm32::adc::{Adc, SampleTime}; use embassy_stm32::peripherals::ADC; -use embassy_stm32::{adc, bind_interrupts, Config}; +use embassy_stm32::{adc, bind_interrupts}; use embassy_time::{Delay, Timer}; use {defmt_rtt as _, panic_probe as _}; @@ -15,12 +15,7 @@ bind_interrupts!(struct Irqs { #[embassy_executor::main] async fn main(_spawner: Spawner) { - // enable HSI because default is MSI but ADC doesn't support - // this as clock source on L0s and uses HSI by default - let mut config = Config::default(); - config.rcc.hsi = true; - let p = embassy_stm32::init(config); - + let p = embassy_stm32::init(Default::default()); info!("Hello World!"); let mut adc = Adc::new(p.ADC, Irqs, &mut Delay); -- cgit