Matrix Orbital Corp

Hello,

I have the EVE2-USB2SPI-KIT-A board with the EVE3-70G-BLM-TPC-F32 display.

When I try to use the software EVE3_70G_TPC.exe from the repo https://github.com/MatrixOrbital/Basic-EVE-Demo I have an error. The soft goes into an infinite loop. It only shows that then nothing:
I also tried the Visual Studio project, I defined EVE_70, EVE3 and TOUCH_CAPACITIVE in MatrixEve2Conf.h and I saw that the program is looping in: It always return 0x00.

I have the driver "mtx-ftdi-2.12.28-1" and the board is seen as "Matrix Orbital USB 2 SPI Driver (COM23)" by my computer.

Here is a photo of my setup, the USB led is always OFF. I also tried with an external power supply.

Do you have any idea of the problem?

Thank you

Hello Jean,

Thank you for posting on the forum.

I also received your email via support@matrixorbital.ca, I hope you have read my response.
With the big 7.0" display, you will need to make sure to supply external power (5V-15) via the barrel jack on the USB bridge.

Let me know how it turns out.

Thank you,
Raquel

Hello Raquel,

I found the email address before this forum.

I tried with an external power supply 5V 2A but current consumption on power supply is~10mA when USB cable is connected.

I checked the flat cable and it seems ok. Everything seems like the github photo

Is it normal that USB led is always off ?
On the USB2SPI:

C9 tension is 3.297V

PWR led is on on the display.
On the display pads:

3V3 is 3.260V
RST = 2.414V (always, even when the software is running)

Thank you,
Jean

I checked SPI signals. CS and CLK seems good.
MOSI seems good too:

First MOSI 0x30

Second MOSI 0x20

Third MOSI 0x00

I continue in the next message because I have the error "Forbidden. Message seems to be spam."

But the display is not responding, MISO:

Complete MISO

First MISO

Second MISO

Third MISO

Fourth MISO

I also checked the RST signal, is it the normal behavior?


Glitch when RST goes from 3.3v to 2.48V

Thank you,
Jean

Hello Jean,

Thank you for the scope captures.
As I write this reply, I see that you have figured out the issue and the display is now working.

Best Regards,
Raquel

Hello Jean and Raquel,

would you be so kind to explain the final solution?
I've got the same situation here but RST is low.

Thanks!
Thomas