INA3221 driver

Use with embedded-hal 1.0.

This is a minimum implementation.

IN3221 supports 4 different i2c addresses. Use [Ina3221::new_with_addr] for addresses other than 0x40.

What's implemented:

• power mode(off/oneshot/continuous)
• all 3 channel readings
• averaging mode
• (not yet)voltage conversion time
• current calculation
• chip ID reading

Usage

let mut voltmon = Ina3221::new(SharedI2cBus::new(mutex_i2c_bus))
    // optionally set the shunt resistor values
    // all defaults to 10 milli-ohms
    .shunt_r1(100)
    .shunt_r2(10)
    .shunt_r3(100);

println!("Channel1 voltage: {}mV", voltmon.bus_channel1().unwrap())
println!("Channel2 current: {}mA", voltmon.current_channel2().unwrap())