EVE2 USB2SPI kit problem with EVE3-70G-BLM-TPC-F32 display

[jeanb]

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:

Code: Select all

channels found : 1
USB->SPI Bridge opened

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:

Code: Select all

do
  {
    Ready = Cmd_READ_REG_ID();
  }while (!Ready);

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

[Raquel]

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

[jeanb]

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

[jeanb]

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."

[jeanb]

But the display is not responding, MISO:

Complete MISO

First MISO

Second MISO

Third MISO

Fourth MISO

[jeanb]

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


Glitch when RST goes from 3.3v to 2.48V

Thank you,
Jean

[Raquel]

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

[eschmo]

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