New G2 Firmware 20200116 - Problems - FIXED w/ 20200121

[cyrille de brébisson]

Hello,

As Tim has explained, the current touch chipset which detects touches on the screen and converts them to touch locations for the CPU is going "End Of Line", meaning that the manufacturer will stop producing it.

As a result, we will be moving G2 manufacturing to a new chipset in the next couple of months (note that apart from 10 prototypes or so, NO calculators "in the wild" should have this new chipset).

This beta has drivers for both touch chipset. It is supposed to use a couple of CPU IO Pins dedicated to indicate "HW revision" to figure out which chipset is present.

If after the upgrade a Prime G2 touch screen stops working, it most likely means that it is mis-identified as a "newer" HW, which should not happen. But, hey, Murphy (a very interesting read on the history of Murphy's law: http://www.todayifoundout.com/index.php/...xpression/)!!!


So, for those that have the touch screen issue, can you please check something for me.

- Disconnect the calculator from the PC.
- Reboot the calculator in "update mode" (Press the ON key, press the Symb key, release the ON key, BUT KEEP THE Symb key pressed!) it should get you to the "base" update screen with a large HP logo and "HP Prime update mode" display.
On the top left, you should see 2 numbers a 3 and some other number. Can you please report what this number is?
Try it a couple a times and make sure it always report the same number.
This number is the "internal HW revision", which correspond to the values of these CPU IO pins described earlier...

My best guess is that the HW detection mechanism is unreliable... Probably due to some delays in the GPIO lines....
Another possibility is that some machines have been badly manufactured with the wrong IO pin selection, but this is a low probability in my opinion...

Thanks,
Cyrille