diff --git a/examples/stm32u5/src/bin/i2c.rs b/examples/stm32u5/src/bin/i2c.rs new file mode 100644 index 000000000..e376c6bc8 --- /dev/null +++ b/examples/stm32u5/src/bin/i2c.rs @@ -0,0 +1,41 @@ +#![no_std] +#![no_main] + +use defmt::{info, unwrap}; +use embassy_executor::Spawner; +use embassy_stm32::dma::NoDma; +use embassy_stm32::i2c::I2c; +use embassy_stm32::time::Hertz; +use embassy_stm32::{bind_interrupts, i2c, peripherals}; +use {defmt_rtt as _, panic_probe as _}; + +const HTS221_ADDRESS: u8 = 0x5F; +const WHOAMI: u8 = 0x0F; + +bind_interrupts!(struct Irqs { + I2C2_EV => i2c::EventInterruptHandler; + I2C2_ER => i2c::ErrorInterruptHandler; +}); + +#[embassy_executor::main] +async fn main(_spawner: Spawner) { + let p = embassy_stm32::init(Default::default()); + let mut i2c = I2c::new( + p.I2C2, + p.PH4, + p.PH5, + Irqs, + NoDma, + NoDma, + Hertz(100_000), + Default::default(), + ); + + let mut data = [0u8; 1]; + unwrap!(i2c.blocking_write_read(HTS221_ADDRESS, &[WHOAMI], &mut data)); + + // HTS221 data sheet is here: https://www.st.com/resource/en/datasheet/hts221.pdf + // 7.1 WHO_AM_I command is x0F which expected response xBC. + info!("Whoami: 0x{:02x}", data[0]); + assert_eq!(0xBC, data[0]); +}