1. Smart Batteries
Spring 2016 – Update 1

2. Actual Work Done We’re done with foundation
We’ve actually gotten something working
SMBus Communications
Interface for Hardware Charger & Operating System
We’re done with foundation
Raspberry Pi and Arduino Communications are set! (I2C)
Minnowboard is being set up
Components are almost all bought
We’re starting to build up circuits
We were able to connect the raspberry pi and the Arduino with I2C bus. We were able to send the data from the Arduino to the Raspberry Pi and the Raspberry pi was able to receive data and interpret the data.

3. Arduino The standard to all hardware prototype
Communicates via SMBus to our boards
Communicates with other components
Intermediate between PC Board and Batteries
The standard of standing standards

4. AT Tiny Based off the Arduino Software Has SMBus / I2C Communications
Will be placed on individual batteries
Holds ALL persistent data for the batteries

5. Minnowboard Turbot Intel x86_64 Architecture Full ACPI Compliance
A PC Board that fits our bill
Intel x86_64 Architecture
(Very well documented)
Full ACPI Compliance
ACPI Debugging provisions
I2C breakout available
Power hungry Beast
2.5 Amp use without HDD
Up to 4 with HDD

6. Coulomb Counter - LTC4150 Standard Run of the mill current sense
Shows power going in and going out
Standard method for calculating battery use and state of charge
CHALLENGE: Limited at 8.5 watts
8.5V)

7. 18650 Lithium Cell Our first battery that we’ll work with
Standard Secondary Li-Ion Cell
No circuitry
Very well profiled
DIY’s finest

8. Code Written Not that much yet
Python Script for SMBus communications with Arduino
Based on C Library
Arduino Script for SMBus Device activity
Several well documented examples available
Manipulation of CPUs on x86_64 Linux
Linux Kernel programs offer fine control with cpufreq-set
We found an Arduino script online that checks for data within the pins of arduino. We created an array of integers that simulates battery information. In the future the array will be constantly updated. Whenever the Raspberry Pi request for data, the Arduino sends the updated array of integers by I2C bus. (Van)
I created a python script that gets all the information from the arduino at any time. (manny)
This concept was made using master reader and slave sender configuration via I2C synchronous serial protocol. This configuration literally makes the Raspberry Pi the master while the Arduino is the slave. (manny)
We have been messing around with the CPU frequency using linux commands.
Most frequency scaling algorithms only offer the CPU to be set to one frequency.
For dynamic frequency scaling, cpu frequency core must be able to tell these drivers
of a specific frequency.
That is where CPU frequency governors comes in. Some of these governors are
*Performance, which sets the highest frequency (from the min, max frequencies).
*PowerSave, sets the frequency to the lowest (from the min, max frequencies).
*Ondemand,sets the frequency according to the current usage.
And the one we are interested in is:
**Userspace, which allows the userspace program running with the id "root", to
set the CPU to a specific frequency. (Van)

9. Up coming goals: Show you SOMETHING working Minnowboard running
Possibly with batteries
Control of CPU Frequency (With Hardware?)
A driver for the Arduino (Just something basic)
Arduino being a team player
Communicate constants to the OS on boot
Have some hardware display (7 Segment display acceptable)

10. Our up coming demo: We will have something to show for next time
An ACPI Smart Battery
Running with an ATTiny
At least 1 chemistry
Charge and Discharge
Controlled by a master arduino

11. Our next presentation You tell us More Code? More Pictures?
What do you want to know?