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UnifiedEngineering / T-962-improvements

Improvements made to the cheap T-962 reflow oven utilizing the _existing_ controller HW
GNU General Public License v3.0
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The display does not work after the firmware update #115

Open ZekMan opened 7 years ago

ZekMan commented 7 years ago

After the update, the display stopped working. The backlight of the display blinks after the stove is turned on. After that, nothing is displayed on the displays.

I was also stupid enough not to make a dump of the original firmware. =\

Can you share the original firmware or help with the display?

balcer commented 7 years ago

I have old MCU with original Chinese firmware. It will be difficult but I can make dump of the hex. Did you tried to flash the uC with unpluged display. This was the problem in my case. I think the flashing interface is also connected to display.

GitLang commented 7 years ago

Is it possible you have left the connection that puts it into programming mode, maybe by leaving a programming lead attached?. That is exactly the effect you would see.

ZekMan commented 7 years ago

@GitLang I tried to put the controller into the firmware mode and reset it again (Pull n_RESET low briefly). If you talk about this.

GadgetGroup commented 7 years ago

Hi, I just bricked my T-962 it seems. I have uploaded the firmware 0.51 on a LPC2144. The firmware is loaded without any problems, but the display is all white, with no text. Heater and fan comes on when power is turn on.

If any one have a original hex it would be lovely :o)

mattmccrink commented 7 years ago

Any updates on this? I just bricked my T-962 as well. Serial data seems to be streaming correctly, but LCD is blank...

JohnWestlake commented 7 years ago

My oven (the larger T962C) has a LPC2134 - are you sure your oven uses a LPC2144?

GadgetGroup commented 6 years ago

Yes, it is a LPC2144, so if there is no response for a new hex file, I believe I need to begin to see if someone have made an upgrade kit or maybe buy a http://www.zallus.com/product/zallus-learning-controller-kit/ if the good guy is still in business.

GadgetGroup commented 6 years ago

Or a Controleo3

JohnWestlake commented 6 years ago

I just purchased the smaller T962 oven (the smallest unit) - here is the HEX dump (I hope I copied all the required memory blocks).

https://www.dropbox.com/s/b6kvk0z91dchwax/T962%20Original%20MiniOven.hex?dl=0

GadgetGroup commented 6 years ago

Perfect thanks, I will try to flash the oven. I just purchased the Controleo3 on eBay, just the basic kit. I need to have the oven up and running as soon as possible.

romansavrulin commented 6 years ago

@JohnWestlake , Please tell what tool did you use to dump the firmware?

xnk commented 6 years ago

My old T962 LPC was not read protected in any way, a simple read from Flash magic was all that was needed. But it sounds really strange that the firmware wouldn't even boot properly. Does the board still look the same as in the pictures here? Any output on the serial link (the one used for programming)?

xnk commented 6 years ago

Looking through the tested configurations, there are reports of successful LPC2144 installations so is really should behave properly.. If there's any output on the serial port when booting that would be very interesting to see.

eschercode commented 3 years ago

I'm getting this bug too (with v0.52 firmware), but out of 15 boots or so, 2 have successfully displayed the Unified Engineering logo & UI works successfully. The rest of the boots the LCD is just backlight, however pressing buttons gets a reaction out of the oven - eg I can start and stop a bake (though I don't know which profile I selected, obviously). Hence, this is probably an issue with driving the display rather than bricking the MCU. Or possible duplicate of issue 186.