26 lines
782 B
Rust
26 lines
782 B
Rust
#![no_std]
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#![no_main]
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use defmt::{info, unwrap};
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use embassy_executor::Spawner;
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use embassy_stm32::i2c::I2c;
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use embassy_stm32::time::Hertz;
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use {defmt_rtt as _, panic_probe as _};
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const HTS221_ADDRESS: u8 = 0x5F;
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const WHOAMI: u8 = 0x0F;
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#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
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let p = embassy_stm32::init(Default::default());
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let mut i2c = I2c::new_blocking(p.I2C2, p.PH4, p.PH5, Hertz(100_000), Default::default());
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let mut data = [0u8; 1];
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unwrap!(i2c.blocking_write_read(HTS221_ADDRESS, &[WHOAMI], &mut data));
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// HTS221 data sheet is here: https://www.st.com/resource/en/datasheet/hts221.pdf
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// 7.1 WHO_AM_I command is x0F which expected response xBC.
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info!("Whoami: 0x{:02x}", data[0]);
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assert_eq!(0xBC, data[0]);
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}
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