[WIP] Added TI ina226 I2C power monitor

[davids5]

@dagar - prelim for discussion on how to factor in this part and finally refactor the batery_status system_power.

There is extra raw values as debug code in the msg for now.

[dagar]

What are the desired use cases?

• how should a system with both analog power bricks and ina226 power monitors be configured?
• multiple ina226 power monitors?

[davids5]

@dagar Long term analog will go away. This will replace that function. 1 per brick on separate buses.

[davids5]

Address changed to 0x41 to match latest HW. Re based on master

[bys1123]

I brought one, glad to test this driver later, my module have a R100(0.1ohm) regsister on it, looks like it's too big for drone, I need to change it. Happy to see there is a shunt parameter for this sensor.

[bys1123]

R100 is dead.

[bys1123]

I used a wrong formula earlier. Right way to calculate the power of this resistor is P=I²R

[davids5]

@dagar were you going to merge this?

[bys1123]

1. Looks like it's not working
   

Parameters shows up, but

1. the shunt value can't set below “0.001”
2. They are not showing in Sensors group.

[davids5]

@bys1123 What flight controller and what connector did you plug it into?

[bys1123]

@davids5 It's Pixhawk4, on I2C A port.

[bys1123]

Looks like the default address is 0x40. 0b1000000

[davids5]

The board I am testing is at 0x41, we should add a scan and a range.

[davids5]

You can change this line for now

[bys1123]

OK, no problem. I'm try it later.

[bys1123]

Do you think scan this large range would cause other issue? Maybe a parameter for this address is better? Just a suggestion, let's find out.

[bys1123]

It's working (I didn't connect battery now.)