esp-hal/hil-test/tests/i2c.rs

//! I2C test
//!
//! Folowing pins are used:
//! SDA     GPIO2   (esp32s2 and esp32s3)
//!         GPIO6   (esp32c6)
//!         GPIO18  (esp32c2)
//!         GPIO4   (esp32, esp32h2 and esp32c3)
//!
//! SCL     GPIO3   (esp32s2 and esp32s3)
//!         GPIO7   (esp32c6, esp32 and esp32c3)
//!         GPIO22  (esp32h2)
//!         GPIO19  (esp32c2)

//% CHIPS: esp32 esp32c2 esp32c3 esp32c6 esp32h2 esp32s2 esp32s3

#![no_std]
#![no_main]

use esp_hal::{gpio::Io, i2c::I2C, peripherals::I2C0, prelude::*, Blocking};
use hil_test as _;

struct Context {
    i2c: I2C<'static, I2C0, Blocking>,
}
#[cfg(test)]
#[embedded_test::tests]
mod tests {
    use defmt::assert_ne;

    use super::*;

    #[init]
    fn init() -> Context {
        let (peripherals, clocks) = esp_hal::init(esp_hal::Config::default());
        let io = Io::new(peripherals.GPIO, peripherals.IO_MUX);

        let (sda, scl) = hil_test::i2c_pins!(io);

        // Create a new peripheral object with the described wiring and standard
        // I2C clock speed:
        let i2c = I2C::new(peripherals.I2C0, sda, scl, 100.kHz(), &clocks);

        Context { i2c }
    }

    #[test]
    #[timeout(3)]
    fn test_read_cali(mut ctx: Context) {
        let mut read_data = [0u8; 22];

        ctx.i2c.write_read(0x77, &[0xaa], &mut read_data).ok();

        assert_ne!(read_data, [0u8; 22])
    }
}