Pi-Top 2 memory map

Is there anyway of finding out where the battery life info is in the memory map of a Pi-Top 2?

Podule space!

I suspect it’s not ‘in the memory map’. On the Pi-Top 1, battery life info etc. was requested by talking to the battery management chip via I2C. I presume it’s the same on the Pi-Top 2 except they use a different chip and so far haven’t published the spec for how to talk to it (despite saying they had done, and linking to a non-existent page on SorceForge).
Pi-Top 1 battery management was achieved because a user reverse-engineered the spec and published it!

I seem to recall querying all the I2C addresses to see what responded to find the address for the battery on the original pi-top.

If the Debian source is anything to go by its on I2C address &10 and the registers are as follows:

    PWR__SHUTDOWN_CTRL = 0xA0
    PWR__BUTT_SHORT_HOLD_TURNON = 0xA1
    PWR__BUTT_SHORT_HOLD_TURNOFF = 0xA2
    PWR__BUTT_LONG_HOLD = 0xA3
    PWR__M1_TIMEOUT_MIN = 0xAA
    PWR__M1_TIMEOUT_MAX = 0xAB
    PWR__M2_TIMEOUT_MIN = 0xAC
    PWR__M2_TIMEOUT_MAX = 0xAD
    PWR__M3_TIMEOUT = 0xAE
    BAT__TEMPERATURE = 0xB1
    BAT__VOLTAGE = 0xB2
    BAT__CURRENT = 0xB3
    BAT__RSOC = 0xB4
    BAT__TIME_TO_EMPTY = 0xB5
    BAT__TIME_TO_FULL = 0xB6
    AUD__CONFIG = 0xC0
    DIS__BACKLIGHT = 0xD1

You could try downloading my “pi-top utilities”https://forums.jaspp.org.uk/forum/viewforum.php?f=28 and modify !pi-topUtils.!Runimage, the I2C address and registers are all at the top.

I spotted more info is now available on the GitHub page, it looks like they’ve learned the error of their ways and ditched SPI for pi-topHUB v2. Querying the battery should no longer run the risk of putting the hub into an indeterminate state.

They’ve also changed pi-topSPEAKER v2 which has a different I2C address and only one this time, instead of up to three. I’ve not looked to see if it’s now mono only.

Interestingly the drivers are all written in Python, so no hardware drivers required. RISCOS will still require an HID driver as HID is not something the OS natively supports.

Watch this space for an announcement re pi-top v2 RISC OS monitoring of battery, turning power off, speaker enabling etc..

Hi Jon Abbott I changed the source of your pi-top program. It now displays the numbers as it should. Can I send the updated program to you ( if you give me you your contact details )
I will have a look to sound later this week. Have you also looked to analog inputs from pi-top PROTO+ ?

Watch this space for an announcement re pi-top v2 RISC OS monitoring of battery, turning power off, speaker enabling etc..

In the absence of Chris posting, I’d better say that CJE /4D now have battery management, screen brightness, power control and speaker enabling software available here: http://cjemicros.co.uk/products/4D-PITOP2-UPSKIT

There is also a pi-top compatible RTC now available here: http://cjemicros.co.uk/products/4D-PITOP-RTC-U

Can I send the updated program to you ( if you give me you your contact details )

Yes please (jon at jaspp dot org dot uk), I’m working on the next release as we speak with updates to handle alternative keyboard VID/PID used on the original pi-top, so I’ll roll your changes in.

I will have a look to sound later this week.

If you’ve not already noticed, the BASIC code executes a script file (the one bundled with the original driver) to initialise the speaker(s) and the Module the controls the volume from inside the HID driver. Assuming the new driver also has a script, you might be able to just drop it in to get the speaker working.

Have you also looked to analog inputs from pi-top PROTO+ ?

No, I’ve just read the specification and believe it’s a Pi GPIO board, so is probably covered elsewhere by standard GPIO access. I don’t think it needs a bespoke driver.

1) I will do hopefully today
2) Sound . Ahum kuch I did found out you need a module for that which I don’t have at this moment. So that has to wait.
3) Yes and No. There are analog inputs located on the board an there is an Atmel processor located on the board and there is also python source available to read values from it.

Hi Jon,

I just send to you the file. Please let me know if you have received it ( with attachment ;-)).

Yours,
Timo

Please let me know if you have received it ( with attachment ;-)).

Received and merged in. If you hop over to the JASPP forum I’ve posted a build for you to test.

As I’m currently looking at adding support for the various keyboards pi-top used, its also worth testing the HID driver to see if its compatible with the pi-top2 keyboard.