From 1efaaa4025120413ec17de90106244445208804a Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Tue, 25 Nov 2025 11:32:37 -0800 Subject: I2c Controller Blocking Driver (#27) * I2c Master Signed-off-by: Felipe Balbi * Fix review comments Signed-off-by: Felipe Balbi * More review comments Signed-off-by: Felipe Balbi --------- Signed-off-by: Felipe Balbi Co-authored-by: Felipe Balbi --- examples/src/bin/i2c-blocking.rs | 31 +++++++++++++++++++++++++++++++ examples/src/bin/i2c-scan-blocking.rs | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 65 insertions(+) create mode 100644 examples/src/bin/i2c-blocking.rs create mode 100644 examples/src/bin/i2c-scan-blocking.rs (limited to 'examples/src') diff --git a/examples/src/bin/i2c-blocking.rs b/examples/src/bin/i2c-blocking.rs new file mode 100644 index 000000000..0f6c8cbae --- /dev/null +++ b/examples/src/bin/i2c-blocking.rs @@ -0,0 +1,31 @@ +#![no_std] +#![no_main] + +use embassy_executor::Spawner; +use embassy_time::Timer; +use hal::clocks::config::Div8; +use hal::config::Config; +use hal::i2c::controller::{self, I2c, Speed}; +use tmp108::Tmp108; +use {defmt_rtt as _, embassy_mcxa as hal, panic_probe as _}; + +#[embassy_executor::main] +async fn main(_spawner: Spawner) { + let mut config = Config::default(); + config.clock_cfg.sirc.fro_lf_div = Div8::from_divisor(1); + + let p = hal::init(config); + + defmt::info!("I2C example"); + + let mut config = controller::Config::default(); + config.speed = Speed::Standard; + let i2c = I2c::new_blocking(p.LPI2C3, p.P3_27, p.P3_28, config).unwrap(); + let mut tmp = Tmp108::new_with_a0_gnd(i2c); + + loop { + let temperature = tmp.temperature().unwrap(); + defmt::info!("Temperature: {}C", temperature); + Timer::after_secs(1).await; + } +} diff --git a/examples/src/bin/i2c-scan-blocking.rs b/examples/src/bin/i2c-scan-blocking.rs new file mode 100644 index 000000000..6d1247e7a --- /dev/null +++ b/examples/src/bin/i2c-scan-blocking.rs @@ -0,0 +1,34 @@ +#![no_std] +#![no_main] + +use embassy_executor::Spawner; +use embassy_time::Timer; +use hal::clocks::config::Div8; +use hal::config::Config; +use hal::i2c::controller::{self, I2c, Speed}; +use {defmt_rtt as _, embassy_mcxa as hal, panic_probe as _}; + +#[embassy_executor::main] +async fn main(_spawner: Spawner) { + let mut config = Config::default(); + config.clock_cfg.sirc.fro_lf_div = Div8::from_divisor(1); + + let p = hal::init(config); + + defmt::info!("I2C example"); + + let mut config = controller::Config::default(); + config.speed = Speed::Standard; + let mut i2c = I2c::new_blocking(p.LPI2C3, p.P3_27, p.P3_28, config).unwrap(); + + for addr in 0x01..=0x7f { + let result = i2c.blocking_write(addr, &[]); + if result.is_ok() { + defmt::info!("Device found at addr {:02x}", addr); + } + } + + loop { + Timer::after_secs(10).await; + } +} -- cgit