NP-41 Emulator (may be)

[Chris Chung]

(12-15-2017 12:14 AM)Sylvain Cote Wrote:  I am currently working 15h/day to reactivate a production line to refurbished 90k embedded devices before the end of the year.
Due to cut off and peoples leaving, I am doing almost everything by myself.

It is 19h00 EST here and I am currently on the commuting train, I expect to be at home at around 20h30.
I will look into this later and will come back here with my test results.
Sorry about that.

Sylvain

Sorry to hear that you are loaded w/ work when we are closing in for the holidays. No worry on the testing. I look a 6 month leave on the project too. It's just a hobby project and I won't do it when it's stressing on myself.

It is more on my bad that this first batch did not went that well. I remember we do have little issues for the 1st batch NP25, mostly quality issues (not firmware). I should have limited this batch to less units and take another iteration to refine the firmware etc.

Sylvain Cote Wrote:2) initial display: NP41 = 3613

It's kind of odd to register 3.6V, the MCU runs between 1.8V to 3.6V.

Sylvain Cote Wrote:Edit #2: I have also tried the [USER] press + [plug-serial-connector] + [USER] release
-> no display, again tried all baud rates, no avail

Edit #3: calc is starting to behave strangely, keycode test no longer works,
it stays on the initial screen but voltage changes when I press different keys
[USER] now close the calculator and [PRGM] bring it up on the initial screen.

#2 would be the last resort as I had placed the bootloader far away from the main firmware location. The bootloader don't do LCD initialization, it only setup a most basic UART and the only purpose is to replace firmware.
So it this fails, it's more like a hardware problem.

#3 It appeared that it was rebooting itself upon keypress, so you got back the "NP41 V=????" initial display.

I am going to replace your unit next week. Please only ship back the deflect units when you have time after the holidays. There is no rush.

I have enough PCB and parts to produce replacements should the need arise.

Also a reminder for other users, I forgot to mention that you will need a 4 pin 0.1" header pins for building the USB-serial cable.

I shall order this dongles in the future and included them in kits.