i2c_loopback.rs

//! This test needs a connection between:
//!
//! | from GPIO (pico Pin) | to GPIO (pico Pin) |
//! | -------------------- | ------------------ |
//! |         0 (1)        |       2 (4)        |
//! |         1 (2)        |       3 (5)        |

#![no_std]
#![no_main]
#![cfg(test)]

use defmt_rtt as _; // defmt transport
use defmt_test as _;
use panic_probe as _;
use rp2040_hal as hal; // memory layout // panic handler

use hal::pac::interrupt;

/// The linker will place this boot block at the start of our program image. We
/// need this to help the ROM bootloader get our code up and running.
/// Note: This boot block is not necessary when using a rp-hal based BSP
/// as the BSPs already perform this step.
#[link_section = ".boot2"]
#[used]
pub static BOOT2: [u8; 256] = rp2040_boot2::BOOT_LOADER_GENERIC_03H;

/// External high-speed crystal on the Raspberry Pi Pico board is 12 MHz. Adjust
/// if your board has a different frequency
const XTAL_FREQ_HZ: u32 = 12_000_000u32;

pub mod i2c_tests;

#[interrupt]
unsafe fn I2C1_IRQ() {
    i2c_tests::blocking::peripheral_handler();
}

#[defmt_test::tests]
mod tests {
    use crate::i2c_tests::{self, blocking::State, ADDR_10BIT, ADDR_7BIT};

    #[init]
    fn setup() -> State {
        i2c_tests::blocking::setup(super::XTAL_FREQ_HZ, ADDR_7BIT)
    }

    #[test]
    fn write(state: &mut State) {
        i2c_tests::blocking::write(state, ADDR_7BIT);
        i2c_tests::blocking::write(state, ADDR_10BIT);
    }

    #[test]
    fn write_iter(state: &mut State) {
        i2c_tests::blocking::write_iter(state, ADDR_7BIT);
        i2c_tests::blocking::write_iter(state, ADDR_10BIT);
    }

    #[test]
    fn write_iter_read(state: &mut State) {
        i2c_tests::blocking::write_iter_read(state, ADDR_7BIT, 1..=1);
        i2c_tests::blocking::write_iter_read(state, ADDR_10BIT, 2..=2);
    }

    #[test]
    fn write_read(state: &mut State) {
        i2c_tests::blocking::write_read(state, ADDR_7BIT, 1..=1);
        i2c_tests::blocking::write_read(state, ADDR_10BIT, 2..=2);
    }

    #[test]
    fn read(state: &mut State) {
        i2c_tests::blocking::read(state, ADDR_7BIT, 0..=0);
        i2c_tests::blocking::read(state, ADDR_10BIT, 1..=1);
    }

    #[test]
    fn transactions_read(state: &mut State) {
        i2c_tests::blocking::transactions_read(state, ADDR_7BIT, 0..=0);
        i2c_tests::blocking::transactions_read(state, ADDR_10BIT, 1..=1);
    }

    #[test]
    fn transactions_write(state: &mut State) {
        i2c_tests::blocking::transactions_write(state, ADDR_7BIT);
        i2c_tests::blocking::transactions_write(state, ADDR_10BIT);
    }

    #[test]
    fn transactions_read_write(state: &mut State) {
        i2c_tests::blocking::transactions_read_write(state, ADDR_7BIT, 1..=1);
        i2c_tests::blocking::transactions_read_write(state, ADDR_10BIT, 2..=2);
    }

    #[test]
    fn transactions_write_read(state: &mut State) {
        i2c_tests::blocking::transactions_write_read(state, ADDR_7BIT, 1..=1);
        i2c_tests::blocking::transactions_write_read(state, ADDR_10BIT, 2..=2);
    }

    #[test]
    fn transaction(state: &mut State) {
        i2c_tests::blocking::transaction(state, ADDR_7BIT, 7..=9);
        i2c_tests::blocking::transaction(state, ADDR_10BIT, 7..=9);
    }

    #[test]
    fn transactions_iter(state: &mut State) {
        i2c_tests::blocking::transactions_iter(state, ADDR_7BIT, 1..=1);
        i2c_tests::blocking::transactions_iter(state, ADDR_10BIT, 2..=2);
    }

    #[test]
    fn embedded_hal(state: &mut State) {
        i2c_tests::blocking::embedded_hal(state, ADDR_7BIT, 2..=2);
        i2c_tests::blocking::embedded_hal(state, ADDR_10BIT, 2..=7);
    }

    // Sad paths:
    // invalid tx buf on write
    // invalid rx buf on read
    //
    // invalid (rx/tx) buf in transactions
    //
    // Peripheral Nack
    //
    // Arbritration conflict
}